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 2004-2005 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_rid;
  60         struct berval s_filterstr;
  61         int             s_flags;        /* search status */
  62         int             s_inuse;        /* reference count */
  63         struct syncres *s_res;
  64         struct syncres *s_restail;
  65         ldap_pvt_thread_mutex_t s_mutex;
  66 } syncops;
  67
  68 /* A received sync control */
  69 typedef struct sync_control {
  70         struct sync_cookie sr_state;
  71         int sr_rhint;
  72 } sync_control;
  73
  74 #if 0 /* moved back to slap.h */
  75 #define o_sync  o_ctrlflag[slap_cids.sc_LDAPsync]
  76 #endif
  77 /* o_sync_mode uses data bits of o_sync */
  78 #define o_sync_mode     o_ctrlflag[slap_cids.sc_LDAPsync]
  79
  80 #define SLAP_SYNC_NONE                                  (LDAP_SYNC_NONE<<SLAP_CONTROL_SHIFT)
  81 #define SLAP_SYNC_REFRESH                               (LDAP_SYNC_REFRESH_ONLY<<SLAP_CONTROL_SHIFT)
  82 #define SLAP_SYNC_PERSIST                               (LDAP_SYNC_RESERVED<<SLAP_CONTROL_SHIFT)
  83 #define SLAP_SYNC_REFRESH_AND_PERSIST   (LDAP_SYNC_REFRESH_AND_PERSIST<<SLAP_CONTROL_SHIFT)
  84
  85 #define PS_IS_REFRESHING        0x01
  86 #define PS_IS_DETACHED          0x02
  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 berval   sl_mincsn;
 104         int             sl_num;
 105         int             sl_size;
 106         slog_entry *sl_head;
 107         slog_entry *sl_tail;
 108         ldap_pvt_thread_mutex_t sl_mutex;
 109 } sessionlog;
 110
 111 /* The main state for this overlay */
 112 typedef struct syncprov_info_t {
 113         syncops         *si_ops;
 114         struct berval   si_ctxcsn;      /* ldapsync context */
 115         int             si_chkops;      /* checkpointing info */
 116         int             si_chktime;
 117         int             si_numops;      /* number of ops since last checkpoint */
 118         time_t  si_chklast;     /* time of last checkpoint */
 119         Avlnode *si_mods;       /* entries being modified */
 120         sessionlog      *si_logs;
 121         ldap_pvt_thread_mutex_t si_csn_mutex;
 122         ldap_pvt_thread_mutex_t si_ops_mutex;
 123         ldap_pvt_thread_mutex_t si_mods_mutex;
 124         char            si_ctxcsnbuf[LDAP_LUTIL_CSNSTR_BUFSIZE];
 125 } syncprov_info_t;
 126
 127 typedef struct opcookie {
 128         slap_overinst *son;
 129         syncmatches *smatches;
 130         struct berval sdn;      /* DN of entry, for deletes */
 131         struct berval sndn;
 132         struct berval suuid;    /* UUID of entry */
 133         struct berval sctxcsn;
 134         int sreference; /* Is the entry a reference? */
 135 } opcookie;
 136
 137 typedef struct fbase_cookie {
 138         struct berval *fdn;     /* DN of a modified entry, for scope testing */
 139         syncops *fss;   /* persistent search we're testing against */
 140         int fbase;      /* if TRUE we found the search base and it's still valid */
 141         int fscope;     /* if TRUE then fdn is within the psearch scope */
 142 } fbase_cookie;
 143
 144 static AttributeName csn_anlist[2];
 145 static AttributeName uuid_anlist[2];
 146
 147 /* Build a LDAPsync intermediate state control */
 148 static int
 149 syncprov_state_ctrl(
 150         Operation       *op,
 151         SlapReply       *rs,
 152         Entry           *e,
 153         int             entry_sync_state,
 154         LDAPControl     **ctrls,
 155         int             num_ctrls,
 156         int             send_cookie,
 157         struct berval   *cookie )
 158 {
 159         Attribute* a;
 160         int ret;
 161         int res;
 162         const char *text = NULL;
 163
 164         BerElementBuffer berbuf;
 165         BerElement *ber = (BerElement *)&berbuf;
 166
 167         struct berval   entryuuid_bv = BER_BVNULL;
 168
 169         ber_init2( ber, 0, LBER_USE_DER );
 170         ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
 171
 172         ctrls[num_ctrls] = op->o_tmpalloc( sizeof ( LDAPControl ), op->o_tmpmemctx );
 173
 174         for ( a = e->e_attrs; a != NULL; a = a->a_next ) {
 175                 AttributeDescription *desc = a->a_desc;
 176                 if ( desc == slap_schema.si_ad_entryUUID ) {
 177                         entryuuid_bv = a->a_nvals[0];
 178                         break;
 179                 }
 180         }
 181
 182         if ( send_cookie && cookie ) {
 183                 ber_printf( ber, "{eOON}",
 184                         entry_sync_state, &entryuuid_bv, cookie );
 185         } else {
 186                 ber_printf( ber, "{eON}",
 187                         entry_sync_state, &entryuuid_bv );
 188         }
 189
 190         ctrls[num_ctrls]->ldctl_oid = LDAP_CONTROL_SYNC_STATE;
 191         ctrls[num_ctrls]->ldctl_iscritical = (op->o_sync == SLAP_CONTROL_CRITICAL);
 192         ret = ber_flatten2( ber, &ctrls[num_ctrls]->ldctl_value, 1 );
 193
 194         ber_free_buf( ber );
 195
 196         if ( ret < 0 ) {
 197                 Debug( LDAP_DEBUG_TRACE,
 198                         "slap_build_sync_ctrl: ber_flatten2 failed\n",
 199                         0, 0, 0 );
 200                 send_ldap_error( op, rs, LDAP_OTHER, "internal error" );
 201                 return ret;
 202         }
 203
 204         return LDAP_SUCCESS;
 205 }
 206
 207 /* Build a LDAPsync final state control */
 208 static int
 209 syncprov_done_ctrl(
 210         Operation       *op,
 211         SlapReply       *rs,
 212         LDAPControl     **ctrls,
 213         int                     num_ctrls,
 214         int                     send_cookie,
 215         struct berval *cookie,
 216         int                     refreshDeletes )
 217 {
 218         int ret;
 219         BerElementBuffer berbuf;
 220         BerElement *ber = (BerElement *)&berbuf;
 221
 222         ber_init2( ber, NULL, LBER_USE_DER );
 223         ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
 224
 225         ctrls[num_ctrls] = op->o_tmpalloc( sizeof ( LDAPControl ), op->o_tmpmemctx );
 226
 227         ber_printf( ber, "{" );
 228         if ( send_cookie && cookie ) {
 229                 ber_printf( ber, "O", cookie );
 230         }
 231         if ( refreshDeletes == LDAP_SYNC_REFRESH_DELETES ) {
 232                 ber_printf( ber, "b", refreshDeletes );
 233         }
 234         ber_printf( ber, "N}" );
 235
 236         ctrls[num_ctrls]->ldctl_oid = LDAP_CONTROL_SYNC_DONE;
 237         ctrls[num_ctrls]->ldctl_iscritical = (op->o_sync == SLAP_CONTROL_CRITICAL);
 238         ret = ber_flatten2( ber, &ctrls[num_ctrls]->ldctl_value, 1 );
 239
 240         ber_free_buf( ber );
 241
 242         if ( ret < 0 ) {
 243                 Debug( LDAP_DEBUG_TRACE,
 244                         "syncprov_done_ctrl: ber_flatten2 failed\n",
 245                         0, 0, 0 );
 246                 send_ldap_error( op, rs, LDAP_OTHER, "internal error" );
 247                 return ret;
 248         }
 249
 250         return LDAP_SUCCESS;
 251 }
 252
 253 #if 0
 254 /* Generate state based on session log - not implemented yet */
 255 static int
 256 syncprov_state_ctrl_from_slog(
 257         Operation       *op,
 258         SlapReply       *rs,
 259         struct slog_entry *slog_e,
 260         int                     entry_sync_state,
 261         LDAPControl     **ctrls,
 262         int                     num_ctrls,
 263         int                     send_cookie,
 264         struct berval   *cookie)
 265 {
 266         Attribute* a;
 267         int ret;
 268         int res;
 269         const char *text = NULL;
 270
 271         BerElementBuffer berbuf;
 272         BerElement *ber = (BerElement *)&berbuf;
 273
 274         struct berval entryuuid_bv      = BER_BVNULL;
 275
 276         ber_init2( ber, NULL, LBER_USE_DER );
 277         ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
 278
 279         ctrls[num_ctrls] = ch_malloc ( sizeof ( LDAPControl ) );
 280
 281         entryuuid_bv = slog_e->sl_uuid;
 282
 283         if ( send_cookie && cookie ) {
 284                 ber_printf( ber, "{eOON}",
 285                         entry_sync_state, &entryuuid_bv, cookie );
 286         } else {
 287                 ber_printf( ber, "{eON}",
 288                         entry_sync_state, &entryuuid_bv );
 289         }
 290
 291         ctrls[num_ctrls]->ldctl_oid = LDAP_CONTROL_SYNC_STATE;
 292         ctrls[num_ctrls]->ldctl_iscritical = (op->o_sync == SLAP_CONTROL_CRITICAL);
 293         ret = ber_flatten2( ber, &ctrls[num_ctrls]->ldctl_value, 1 );
 294
 295         ber_free_buf( ber );
 296
 297         if ( ret < 0 ) {
 298                 Debug( LDAP_DEBUG_TRACE,
 299                         "slap_build_sync_ctrl: ber_flatten2 failed\n",
 300                         0, 0, 0 );
 301                 send_ldap_error( op, rs, LDAP_OTHER, "internal error" );
 302                 return ret;
 303         }
 304
 305         return LDAP_SUCCESS;
 306 }
 307 #endif
 308
 309 static int
 310 syncprov_sendinfo(
 311         Operation       *op,
 312         SlapReply       *rs,
 313         int                     type,
 314         struct berval *cookie,
 315         int                     refreshDone,
 316         BerVarray       syncUUIDs,
 317         int                     refreshDeletes )
 318 {
 319         BerElementBuffer berbuf;
 320         BerElement *ber = (BerElement *)&berbuf;
 321         struct berval rspdata;
 322
 323         int ret;
 324
 325         ber_init2( ber, NULL, LBER_USE_DER );
 326         ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
 327
 328         if ( type ) {
 329                 switch ( type ) {
 330                 case LDAP_TAG_SYNC_NEW_COOKIE:
 331                         ber_printf( ber, "tO", type, cookie );
 332                         break;
 333                 case LDAP_TAG_SYNC_REFRESH_DELETE:
 334                 case LDAP_TAG_SYNC_REFRESH_PRESENT:
 335                         ber_printf( ber, "t{", type );
 336                         if ( cookie ) {
 337                                 ber_printf( ber, "O", cookie );
 338                         }
 339                         if ( refreshDone == 0 ) {
 340                                 ber_printf( ber, "b", refreshDone );
 341                         }
 342                         ber_printf( ber, "N}" );
 343                         break;
 344                 case LDAP_TAG_SYNC_ID_SET:
 345                         ber_printf( ber, "t{", type );
 346                         if ( cookie ) {
 347                                 ber_printf( ber, "O", cookie );
 348                         }
 349                         if ( refreshDeletes == 1 ) {
 350                                 ber_printf( ber, "b", refreshDeletes );
 351                         }
 352                         ber_printf( ber, "[W]", syncUUIDs );
 353                         ber_printf( ber, "N}" );
 354                         break;
 355                 default:
 356                         Debug( LDAP_DEBUG_TRACE,
 357                                 "syncprov_sendinfo: invalid syncinfo type (%d)\n",
 358                                 type, 0, 0 );
 359                         return LDAP_OTHER;
 360                 }
 361         }
 362
 363         ret = ber_flatten2( ber, &rspdata, 0 );
 364
 365         if ( ret < 0 ) {
 366                 Debug( LDAP_DEBUG_TRACE,
 367                         "syncprov_sendinfo: ber_flatten2 failed\n",
 368                         0, 0, 0 );
 369                 send_ldap_error( op, rs, LDAP_OTHER, "internal error" );
 370                 return ret;
 371         }
 372
 373         rs->sr_rspoid = LDAP_SYNC_INFO;
 374         rs->sr_rspdata = &rspdata;
 375         send_ldap_intermediate( op, rs );
 376         rs->sr_rspdata = NULL;
 377         ber_free_buf( ber );
 378
 379         return LDAP_SUCCESS;
 380 }
 381
 382 /* Find a modtarget in an AVL tree */
 383 static int
 384 sp_avl_cmp( const void *c1, const void *c2 )
 385 {
 386         const modtarget *m1, *m2;
 387         int rc;
 388
 389         m1 = c1; m2 = c2;
 390         rc = m1->mt_op->o_req_ndn.bv_len - m2->mt_op->o_req_ndn.bv_len;
 391
 392         if ( rc ) return rc;
 393         return ber_bvcmp( &m1->mt_op->o_req_ndn, &m2->mt_op->o_req_ndn );
 394 }
 395
 396 /* syncprov_findbase:
 397  *   finds the true DN of the base of a search (with alias dereferencing) and
 398  * checks to make sure the base entry doesn't get replaced with a different
 399  * entry (e.g., swapping trees via ModDN, or retargeting an alias). If a
 400  * change is detected, any persistent search on this base must be terminated /
 401  * reloaded.
 402  *   On the first call, we just save the DN and entryID. On subsequent calls
 403  * we compare the DN and entryID with the saved values.
 404  */
 405 static int
 406 findbase_cb( Operation *op, SlapReply *rs )
 407 {
 408         slap_callback *sc = op->o_callback;
 409
 410         if ( rs->sr_type == REP_SEARCH && rs->sr_err == LDAP_SUCCESS ) {
 411                 fbase_cookie *fc = sc->sc_private;
 412
 413                 /* If no entryID, we're looking for the first time.
 414                  * Just store whatever we got.
 415                  */
 416                 if ( fc->fss->s_eid == NOID ) {
 417                         fc->fbase = 1;
 418                         fc->fss->s_eid = rs->sr_entry->e_id;
 419                         ber_dupbv( &fc->fss->s_base, &rs->sr_entry->e_nname );
 420
 421                 } else if ( rs->sr_entry->e_id == fc->fss->s_eid &&
 422                         dn_match( &rs->sr_entry->e_nname, &fc->fss->s_base )) {
 423
 424                 /* OK, the DN is the same and the entryID is the same. Now
 425                  * see if the fdn resides in the scope.
 426                  */
 427                         fc->fbase = 1;
 428                         switch ( fc->fss->s_op->ors_scope ) {
 429                         case LDAP_SCOPE_BASE:
 430                                 fc->fscope = dn_match( fc->fdn, &rs->sr_entry->e_nname );
 431                                 break;
 432                         case LDAP_SCOPE_ONELEVEL: {
 433                                 struct berval pdn;
 434                                 dnParent( fc->fdn, &pdn );
 435                                 fc->fscope = dn_match( &pdn, &rs->sr_entry->e_nname );
 436                                 break; }
 437                         case LDAP_SCOPE_SUBTREE:
 438                                 fc->fscope = dnIsSuffix( fc->fdn, &rs->sr_entry->e_nname );
 439                                 break;
 440 #ifdef LDAP_SCOPE_SUBORDINATE
 441                         case LDAP_SCOPE_SUBORDINATE:
 442                                 fc->fscope = dnIsSuffix( fc->fdn, &rs->sr_entry->e_nname ) &&
 443                                         !dn_match( fc->fdn, &rs->sr_entry->e_nname );
 444                                 break;
 445 #endif
 446                         }
 447                 }
 448         }
 449         if ( rs->sr_err != LDAP_SUCCESS ) {
 450                 Debug( LDAP_DEBUG_ANY, "findbase failed! %d\n", rs->sr_err,0,0 );
 451         }
 452         return LDAP_SUCCESS;
 453 }
 454
 455 static int
 456 syncprov_findbase( Operation *op, fbase_cookie *fc )
 457 {
 458         opcookie *opc = op->o_callback->sc_private;
 459         slap_overinst *on = opc->son;
 460         syncprov_info_t         *si = on->on_bi.bi_private;
 461
 462         slap_callback cb = {0};
 463         Operation fop;
 464         SlapReply frs = { REP_RESULT };
 465         int rc;
 466
 467         fop = *op;
 468
 469         cb.sc_response = findbase_cb;
 470         cb.sc_private = fc;
 471
 472         fop.o_sync_mode &= SLAP_CONTROL_MASK;   /* turn off sync mode */
 473         fop.o_callback = &cb;
 474         fop.o_tag = LDAP_REQ_SEARCH;
 475         fop.ors_scope = LDAP_SCOPE_BASE;
 476         fop.ors_deref = fc->fss->s_op->ors_deref;
 477         fop.ors_limit = NULL;
 478         fop.ors_slimit = 1;
 479         fop.ors_tlimit = SLAP_NO_LIMIT;
 480         fop.ors_attrs = slap_anlist_no_attrs;
 481         fop.ors_attrsonly = 1;
 482         fop.ors_filter = fc->fss->s_op->ors_filter;
 483         fop.ors_filterstr = fc->fss->s_op->ors_filterstr;
 484
 485         fop.o_req_ndn = fc->fss->s_op->o_req_ndn;
 486
 487         fop.o_bd->bd_info = on->on_info->oi_orig;
 488         rc = fop.o_bd->be_search( &fop, &frs );
 489         fop.o_bd->bd_info = (BackendInfo *)on;
 490
 491         if ( fc->fbase ) return LDAP_SUCCESS;
 492
 493         /* If entryID has changed, then the base of this search has
 494          * changed. Invalidate the psearch.
 495          */
 496         return LDAP_NO_SUCH_OBJECT;
 497 }
 498
 499 /* syncprov_findcsn:
 500  *   This function has three different purposes, but they all use a search
 501  * that filters on entryCSN so they're combined here.
 502  * 1: at startup time, after a contextCSN has been read from the database,
 503  * we search for all entries with CSN >= contextCSN in case the contextCSN
 504  * was not checkpointed at the previous shutdown.
 505  *
 506  * 2: when the current contextCSN is known and we have a sync cookie, we search
 507  * for one entry with CSN <= the cookie CSN. (Used to search for =.) If an
 508  * entry is found, the cookie CSN is valid, otherwise it is stale.
 509  *
 510  * 3: during a refresh phase, we search for all entries with CSN <= the cookie
 511  * CSN, and generate Present records for them. We always collect this result
 512  * in SyncID sets, even if there's only one match.
 513  */
 514 #define FIND_MAXCSN     1
 515 #define FIND_CSN        2
 516 #define FIND_PRESENT    3
 517
 518 static int
 519 findmax_cb( Operation *op, SlapReply *rs )
 520 {
 521         if ( rs->sr_type == REP_SEARCH && rs->sr_err == LDAP_SUCCESS ) {
 522                 struct berval *maxcsn = op->o_callback->sc_private;
 523                 Attribute *a = attr_find( rs->sr_entry->e_attrs,
 524                         slap_schema.si_ad_entryCSN );
 525
 526                 if ( a && ber_bvcmp( &a->a_vals[0], maxcsn ) > 0 ) {
 527                         maxcsn->bv_len = a->a_vals[0].bv_len;
 528                         strcpy( maxcsn->bv_val, a->a_vals[0].bv_val );
 529                 }
 530         }
 531         return LDAP_SUCCESS;
 532 }
 533
 534 static int
 535 findcsn_cb( Operation *op, SlapReply *rs )
 536 {
 537         slap_callback *sc = op->o_callback;
 538
 539         if ( rs->sr_type == REP_SEARCH && rs->sr_err == LDAP_SUCCESS ) {
 540                 sc->sc_private = (void *)1;
 541         }
 542         return LDAP_SUCCESS;
 543 }
 544
 545 /* Build a list of entryUUIDs for sending in a SyncID set */
 546
 547 #define UUID_LEN        16
 548
 549 typedef struct fpres_cookie {
 550         int num;
 551         BerVarray uuids;
 552         char *last;
 553 } fpres_cookie;
 554
 555 static int
 556 findpres_cb( Operation *op, SlapReply *rs )
 557 {
 558         slap_callback *sc = op->o_callback;
 559         fpres_cookie *pc = sc->sc_private;
 560         Attribute *a;
 561         int ret = SLAP_CB_CONTINUE;
 562
 563         switch ( rs->sr_type ) {
 564         case REP_SEARCH:
 565                 a = attr_find( rs->sr_entry->e_attrs, slap_schema.si_ad_entryUUID );
 566                 if ( a ) {
 567                         pc->uuids[pc->num].bv_val = pc->last;
 568                         AC_MEMCPY( pc->uuids[pc->num].bv_val, a->a_nvals[0].bv_val,
 569                                 pc->uuids[pc->num].bv_len );
 570                         pc->num++;
 571                         pc->last = pc->uuids[pc->num].bv_val;
 572                         pc->uuids[pc->num].bv_val = NULL;
 573                 }
 574                 ret = LDAP_SUCCESS;
 575                 if ( pc->num != SLAP_SYNCUUID_SET_SIZE )
 576                         break;
 577                 /* FALLTHRU */
 578         case REP_RESULT:
 579                 ret = rs->sr_err;
 580                 if ( pc->num ) {
 581                         ret = syncprov_sendinfo( op, rs, LDAP_TAG_SYNC_ID_SET, NULL,
 582                                 0, pc->uuids, 0 );
 583                         pc->uuids[pc->num].bv_val = pc->last;
 584                         pc->num = 0;
 585                         pc->last = pc->uuids[0].bv_val;
 586                 }
 587                 break;
 588         default:
 589                 break;
 590         }
 591         return ret;
 592 }
 593
 594 static int
 595 syncprov_findcsn( Operation *op, int mode )
 596 {
 597         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
 598         syncprov_info_t         *si = on->on_bi.bi_private;
 599
 600         slap_callback cb = {0};
 601         Operation fop;
 602         SlapReply frs = { REP_RESULT };
 603         char buf[LDAP_LUTIL_CSNSTR_BUFSIZE + STRLENOF("(entryCSN<=)")];
 604         char cbuf[LDAP_LUTIL_CSNSTR_BUFSIZE];
 605         struct berval fbuf, maxcsn;
 606         Filter cf, af;
 607         AttributeAssertion eq;
 608         int i, rc = LDAP_SUCCESS;
 609         fpres_cookie pcookie;
 610         sync_control *srs = NULL;
 611
 612         if ( mode != FIND_MAXCSN ) {
 613                 srs = op->o_controls[slap_cids.sc_LDAPsync];
 614
 615                 if ( srs->sr_state.ctxcsn.bv_len >= LDAP_LUTIL_CSNSTR_BUFSIZE ) {
 616                         return LDAP_OTHER;
 617                 }
 618         }
 619
 620         fop = *op;
 621         fop.o_sync_mode &= SLAP_CONTROL_MASK;   /* turn off sync_mode */
 622
 623         fbuf.bv_val = buf;
 624         cf.f_ava = &eq;
 625         cf.f_av_desc = slap_schema.si_ad_entryCSN;
 626         cf.f_next = NULL;
 627
 628         fop.o_callback = &cb;
 629         fop.ors_limit = NULL;
 630         fop.ors_tlimit = SLAP_NO_LIMIT;
 631         fop.ors_filter = &cf;
 632         fop.ors_filterstr = fbuf;
 633
 634         switch( mode ) {
 635         case FIND_MAXCSN:
 636                 cf.f_choice = LDAP_FILTER_GE;
 637                 cf.f_av_value = si->si_ctxcsn;
 638                 fbuf.bv_len = sprintf( buf, "(entryCSN>=%s)",
 639                         cf.f_av_value.bv_val );
 640                 fop.ors_attrsonly = 0;
 641                 fop.ors_attrs = csn_anlist;
 642                 fop.ors_slimit = SLAP_NO_LIMIT;
 643                 cb.sc_private = &maxcsn;
 644                 cb.sc_response = findmax_cb;
 645                 strcpy( cbuf, si->si_ctxcsn.bv_val );
 646                 maxcsn.bv_val = cbuf;
 647                 maxcsn.bv_len = si->si_ctxcsn.bv_len;
 648                 break;
 649         case FIND_CSN:
 650                 cf.f_choice = LDAP_FILTER_LE;
 651                 cf.f_av_value = srs->sr_state.ctxcsn;
 652                 fbuf.bv_len = sprintf( buf, "(entryCSN<=%s)",
 653                         cf.f_av_value.bv_val );
 654                 fop.ors_attrsonly = 1;
 655                 fop.ors_attrs = slap_anlist_no_attrs;
 656                 fop.ors_slimit = 1;
 657                 cb.sc_private = NULL;
 658                 cb.sc_response = findcsn_cb;
 659                 break;
 660         case FIND_PRESENT:
 661                 af.f_choice = LDAP_FILTER_AND;
 662                 af.f_next = NULL;
 663                 af.f_and = &cf;
 664                 cf.f_choice = LDAP_FILTER_LE;
 665                 cf.f_av_value = srs->sr_state.ctxcsn;
 666                 cf.f_next = op->ors_filter;
 667                 fop.ors_filter = &af;
 668                 filter2bv_x( &fop, fop.ors_filter, &fop.ors_filterstr );
 669                 fop.ors_attrsonly = 0;
 670                 fop.ors_attrs = uuid_anlist;
 671                 fop.ors_slimit = SLAP_NO_LIMIT;
 672                 /* We want pure entries, not referrals */
 673                 fop.o_managedsait = SLAP_CONTROL_CRITICAL;
 674                 cb.sc_private = &pcookie;
 675                 cb.sc_response = findpres_cb;
 676                 pcookie.num = 0;
 677
 678                 /* preallocate storage for a full set */
 679                 pcookie.uuids = op->o_tmpalloc( (SLAP_SYNCUUID_SET_SIZE+1) *
 680                         sizeof(struct berval) + SLAP_SYNCUUID_SET_SIZE * UUID_LEN,
 681                         op->o_tmpmemctx );
 682                 pcookie.last = (char *)(pcookie.uuids + SLAP_SYNCUUID_SET_SIZE+1);
 683                 pcookie.uuids[0].bv_val = pcookie.last;
 684                 pcookie.uuids[0].bv_len = UUID_LEN;
 685                 for (i=1; i<SLAP_SYNCUUID_SET_SIZE; i++) {
 686                         pcookie.uuids[i].bv_val = pcookie.uuids[i-1].bv_val + UUID_LEN;
 687                         pcookie.uuids[i].bv_len = UUID_LEN;
 688                 }
 689                 break;
 690         }
 691
 692         fop.o_bd->bd_info = on->on_info->oi_orig;
 693         fop.o_bd->be_search( &fop, &frs );
 694         fop.o_bd->bd_info = (BackendInfo *)on;
 695
 696         switch( mode ) {
 697         case FIND_MAXCSN:
 698                 strcpy( si->si_ctxcsnbuf, maxcsn.bv_val );
 699                 si->si_ctxcsn.bv_len = maxcsn.bv_len;
 700                 break;
 701         case FIND_CSN:
 702                 /* If matching CSN was not found, invalidate the context. */
 703                 if ( !cb.sc_private ) rc = LDAP_NO_SUCH_OBJECT;
 704                 break;
 705         case FIND_PRESENT:
 706                 op->o_tmpfree( pcookie.uuids, op->o_tmpmemctx );
 707                 op->o_tmpfree( fop.ors_filterstr.bv_val, op->o_tmpmemctx );
 708                 break;
 709         }
 710
 711         return rc;
 712 }
 713
 714 /* Queue a persistent search response if still in Refresh stage */
 715 static int
 716 syncprov_qresp( opcookie *opc, syncops *so, int mode )
 717 {
 718         syncres *sr;
 719
 720         sr = ch_malloc(sizeof(syncres) + opc->suuid.bv_len + 1 +
 721                 opc->sdn.bv_len + 1 + opc->sndn.bv_len + 1 + opc->sctxcsn.bv_len + 1 );
 722         sr->s_next = NULL;
 723         sr->s_dn.bv_val = (char *)(sr + 1);
 724         sr->s_mode = mode;
 725         sr->s_isreference = opc->sreference;
 726         sr->s_ndn.bv_val = lutil_strcopy( sr->s_dn.bv_val, opc->sdn.bv_val );
 727         *(sr->s_ndn.bv_val++) = '\0';
 728         sr->s_uuid.bv_val = lutil_strcopy( sr->s_ndn.bv_val, opc->sndn.bv_val );
 729         *(sr->s_uuid.bv_val++) = '\0';
 730         sr->s_csn.bv_val = lutil_strcopy( sr->s_uuid.bv_val, opc->suuid.bv_val );
 731
 732         if ( !so->s_res ) {
 733                 so->s_res = sr;
 734         } else {
 735                 so->s_restail->s_next = sr;
 736         }
 737         so->s_restail = sr;
 738         ldap_pvt_thread_mutex_unlock( &so->s_mutex );
 739         return LDAP_SUCCESS;
 740 }
 741
 742 /* Send a persistent search response */
 743 static int
 744 syncprov_sendresp( Operation *op, opcookie *opc, syncops *so, Entry *e, int mode, int queue )
 745 {
 746         slap_overinst *on = opc->son;
 747         syncprov_info_t *si = on->on_bi.bi_private;
 748
 749         SlapReply rs = { REP_SEARCH };
 750         LDAPControl *ctrls[2];
 751         struct berval cookie;
 752         Entry e_uuid = {0};
 753         Attribute a_uuid = {0};
 754         Operation sop = *so->s_op;
 755         Opheader ohdr;
 756
 757         ohdr = *sop.o_hdr;
 758         sop.o_hdr = &ohdr;
 759         sop.o_tmpmemctx = op->o_tmpmemctx;
 760         sop.o_bd = op->o_bd;
 761         sop.o_controls = op->o_controls;
 762
 763         if ( queue && (so->s_flags & PS_IS_REFRESHING) ) {
 764                 ldap_pvt_thread_mutex_lock( &so->s_mutex );
 765                 if ( so->s_flags & PS_IS_REFRESHING )
 766                         return syncprov_qresp( opc, so, mode );
 767                 ldap_pvt_thread_mutex_unlock( &so->s_mutex );
 768         }
 769
 770         ctrls[1] = NULL;
 771         slap_compose_sync_cookie( op, &cookie, &opc->sctxcsn, so->s_rid );
 772
 773         e_uuid.e_attrs = &a_uuid;
 774         a_uuid.a_desc = slap_schema.si_ad_entryUUID;
 775         a_uuid.a_nvals = &opc->suuid;
 776         rs.sr_err = syncprov_state_ctrl( &sop, &rs, &e_uuid,
 777                 mode, ctrls, 0, 1, &cookie );
 778
 779         rs.sr_entry = e;
 780         rs.sr_ctrls = ctrls;
 781         switch( mode ) {
 782         case LDAP_SYNC_ADD:
 783                 if ( opc->sreference ) {
 784                         rs.sr_ref = get_entry_referrals( &sop, e );
 785                         send_search_reference( &sop, &rs );
 786                         ber_bvarray_free( rs.sr_ref );
 787                         break;
 788                 }
 789                 /* fallthru */
 790         case LDAP_SYNC_MODIFY:
 791                 rs.sr_attrs = sop.ors_attrs;
 792                 send_search_entry( &sop, &rs );
 793                 break;
 794         case LDAP_SYNC_DELETE:
 795                 e_uuid.e_attrs = NULL;
 796                 e_uuid.e_name = opc->sdn;
 797                 e_uuid.e_nname = opc->sndn;
 798                 rs.sr_entry = &e_uuid;
 799                 if ( opc->sreference ) {
 800                         struct berval bv = BER_BVNULL;
 801                         rs.sr_ref = &bv;
 802                         send_search_reference( &sop, &rs );
 803                 } else {
 804                         send_search_entry( &sop, &rs );
 805                 }
 806                 break;
 807         default:
 808                 assert(0);
 809         }
 810         op->o_tmpfree( rs.sr_ctrls[0], op->o_tmpmemctx );
 811         rs.sr_ctrls = NULL;
 812         return rs.sr_err;
 813 }
 814
 815 static void
 816 syncprov_free_syncop( syncops *so )
 817 {
 818         syncres *sr, *srnext;
 819         GroupAssertion *ga, *gnext;
 820
 821         ldap_pvt_thread_mutex_lock( &so->s_mutex );
 822         so->s_inuse--;
 823         if ( so->s_inuse > 0 ) {
 824                 ldap_pvt_thread_mutex_unlock( &so->s_mutex );
 825                 return;
 826         }
 827         ldap_pvt_thread_mutex_unlock( &so->s_mutex );
 828         if ( so->s_flags & PS_IS_DETACHED ) {
 829                 filter_free( so->s_op->ors_filter );
 830                 for ( ga = so->s_op->o_groups; ga; ga=gnext ) {
 831                         gnext = ga->ga_next;
 832                         ch_free( ga );
 833                 }
 834                 ch_free( so->s_op );
 835         }
 836         ch_free( so->s_base.bv_val );
 837         for ( sr=so->s_res; sr; sr=srnext ) {
 838                 srnext = sr->s_next;
 839                 ch_free( sr );
 840         }
 841         ldap_pvt_thread_mutex_destroy( &so->s_mutex );
 842         ch_free( so );
 843 }
 844
 845 static int
 846 syncprov_drop_psearch( syncops *so, int lock )
 847 {
 848         if ( so->s_flags & PS_IS_DETACHED ) {
 849                 if ( lock )
 850                         ldap_pvt_thread_mutex_lock( &so->s_op->o_conn->c_mutex );
 851                 so->s_op->o_conn->c_n_ops_executing--;
 852                 so->s_op->o_conn->c_n_ops_completed++;
 853                 LDAP_STAILQ_REMOVE( &so->s_op->o_conn->c_ops, so->s_op, slap_op,
 854                         o_next );
 855                 if ( lock )
 856                         ldap_pvt_thread_mutex_unlock( &so->s_op->o_conn->c_mutex );
 857         }
 858         syncprov_free_syncop( so );
 859
 860         return 0;
 861 }
 862
 863 static int
 864 syncprov_op_abandon( Operation *op, SlapReply *rs )
 865 {
 866         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
 867         syncprov_info_t         *si = on->on_bi.bi_private;
 868         syncops *so, *soprev;
 869
 870         ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
 871         for ( so=si->si_ops, soprev = (syncops *)&si->si_ops; so;
 872                 soprev=so, so=so->s_next ) {
 873                 if ( so->s_op->o_connid == op->o_connid &&
 874                         so->s_op->o_msgid == op->orn_msgid ) {
 875                                 so->s_op->o_abandon = 1;
 876                                 soprev->s_next = so->s_next;
 877                                 break;
 878                 }
 879         }
 880         ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
 881         if ( so ) {
 882                 /* Is this really a Cancel exop? */
 883                 if ( op->o_tag != LDAP_REQ_ABANDON ) {
 884                         rs->sr_err = LDAP_CANCELLED;
 885                         send_ldap_result( so->s_op, rs );
 886                 }
 887                 syncprov_drop_psearch( so, 0 );
 888         }
 889         return SLAP_CB_CONTINUE;
 890 }
 891
 892 /* Find which persistent searches are affected by this operation */
 893 static void
 894 syncprov_matchops( Operation *op, opcookie *opc, int saveit )
 895 {
 896         slap_overinst *on = opc->son;
 897         syncprov_info_t         *si = on->on_bi.bi_private;
 898
 899         fbase_cookie fc;
 900         syncops *ss, *sprev, *snext;
 901         Entry *e;
 902         Attribute *a;
 903         int rc;
 904         struct berval newdn;
 905         int freefdn = 0;
 906
 907         fc.fdn = &op->o_req_ndn;
 908         /* compute new DN */
 909         if ( op->o_tag == LDAP_REQ_MODRDN && !saveit ) {
 910                 struct berval pdn;
 911                 if ( op->orr_nnewSup ) pdn = *op->orr_nnewSup;
 912                 else dnParent( fc.fdn, &pdn );
 913                 build_new_dn( &newdn, &pdn, &op->orr_nnewrdn, op->o_tmpmemctx );
 914                 fc.fdn = &newdn;
 915                 freefdn = 1;
 916         }
 917         if ( op->o_tag != LDAP_REQ_ADD ) {
 918                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
 919                 rc = be_entry_get_rw( op, fc.fdn, NULL, NULL, 0, &e );
 920                 op->o_bd->bd_info = (BackendInfo *)on;
 921                 if ( rc ) return;
 922         } else {
 923                 e = op->ora_e;
 924         }
 925
 926         if ( saveit ) {
 927                 ber_dupbv_x( &opc->sdn, &e->e_name, op->o_tmpmemctx );
 928                 ber_dupbv_x( &opc->sndn, &e->e_nname, op->o_tmpmemctx );
 929                 opc->sreference = is_entry_referral( e );
 930         }
 931         if ( saveit || op->o_tag == LDAP_REQ_ADD ) {
 932                 a = attr_find( e->e_attrs, slap_schema.si_ad_entryUUID );
 933                 if ( a )
 934                         ber_dupbv_x( &opc->suuid, &a->a_nvals[0], op->o_tmpmemctx );
 935         }
 936
 937         ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
 938         for (ss = si->si_ops, sprev = (syncops *)&si->si_ops; ss;
 939                 sprev = ss, ss=snext)
 940         {
 941                 syncmatches *sm;
 942                 int found = 0;
 943
 944                 snext = ss->s_next;
 945                 /* validate base */
 946                 fc.fss = ss;
 947                 fc.fbase = 0;
 948                 fc.fscope = 0;
 949
 950                 /* If the base of the search is missing, signal a refresh */
 951                 rc = syncprov_findbase( op, &fc );
 952                 if ( rc != LDAP_SUCCESS ) {
 953                         SlapReply rs = {REP_RESULT};
 954                         send_ldap_error( ss->s_op, &rs, LDAP_SYNC_REFRESH_REQUIRED,
 955                                 "search base has changed" );
 956                         sprev->s_next = snext;
 957                         syncprov_drop_psearch( ss, 1 );
 958                         continue;
 959                 }
 960
 961                 /* If we're sending results now, look for this op in old matches */
 962                 if ( !saveit ) {
 963                         syncmatches *old;
 964                         for ( sm=opc->smatches, old=(syncmatches *)&opc->smatches; sm;
 965                                 old=sm, sm=sm->sm_next ) {
 966                                 if ( sm->sm_op == ss ) {
 967                                         found = 1;
 968                                         old->sm_next = sm->sm_next;
 969                                         op->o_tmpfree( sm, op->o_tmpmemctx );
 970                                         break;
 971                                 }
 972                         }
 973                 }
 974
 975                 /* check if current o_req_dn is in scope and matches filter */
 976                 if ( fc.fscope && test_filter( op, e, ss->s_op->ors_filter ) ==
 977                         LDAP_COMPARE_TRUE ) {
 978                         if ( saveit ) {
 979                                 sm = op->o_tmpalloc( sizeof(syncmatches), op->o_tmpmemctx );
 980                                 sm->sm_next = opc->smatches;
 981                                 sm->sm_op = ss;
 982                                 ss->s_inuse++;
 983                                 opc->smatches = sm;
 984                         } else {
 985                                 /* if found send UPDATE else send ADD */
 986                                 syncprov_sendresp( op, opc, ss, e,
 987                                         found ? LDAP_SYNC_MODIFY : LDAP_SYNC_ADD, 1 );
 988                         }
 989                 } else if ( !saveit && found ) {
 990                         /* send DELETE */
 991                         syncprov_sendresp( op, opc, ss, NULL, LDAP_SYNC_DELETE, 1 );
 992                 }
 993         }
 994         ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
 995 done:
 996         if ( op->o_tag != LDAP_REQ_ADD ) {
 997                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
 998                 be_entry_release_rw( op, e, 0 );
 999                 op->o_bd->bd_info = (BackendInfo *)on;
1000         }
1001         if ( freefdn ) {
1002                 op->o_tmpfree( fc.fdn->bv_val, op->o_tmpmemctx );
1003         }
1004 }
1005
1006 static int
1007 syncprov_op_cleanup( Operation *op, SlapReply *rs )
1008 {
1009         slap_callback *cb = op->o_callback;
1010         opcookie *opc = cb->sc_private;
1011         slap_overinst *on = opc->son;
1012         syncprov_info_t         *si = on->on_bi.bi_private;
1013         syncmatches *sm, *snext;
1014         modtarget *mt, mtdummy;
1015
1016         for (sm = opc->smatches; sm; sm=snext) {
1017                 snext = sm->sm_next;
1018                 syncprov_free_syncop( sm->sm_op );
1019                 op->o_tmpfree( sm, op->o_tmpmemctx );
1020         }
1021
1022         /* Remove op from lock table */
1023         mtdummy.mt_op = op;
1024         ldap_pvt_thread_mutex_lock( &si->si_mods_mutex );
1025         mt = avl_find( si->si_mods, &mtdummy, sp_avl_cmp );
1026         ldap_pvt_thread_mutex_unlock( &si->si_mods_mutex );
1027         if ( mt ) {
1028                 modinst *mi = mt->mt_mods;
1029
1030                 /* If there are more, promote the next one */
1031                 ldap_pvt_thread_mutex_lock( &mt->mt_mutex );
1032                 if ( mi->mi_next ) {
1033                         mt->mt_mods = mi->mi_next;
1034                         mt->mt_op = mt->mt_mods->mi_op;
1035                         ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
1036                 } else {
1037                         ldap_pvt_thread_mutex_lock( &si->si_mods_mutex );
1038                         avl_delete( &si->si_mods, mt, sp_avl_cmp );
1039                         ldap_pvt_thread_mutex_unlock( &si->si_mods_mutex );
1040                         ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
1041                         ldap_pvt_thread_mutex_destroy( &mt->mt_mutex );
1042                         ch_free( mt );
1043                 }
1044         }
1045         if ( !BER_BVISNULL( &opc->suuid ))
1046                 op->o_tmpfree( opc->suuid.bv_val, op->o_tmpmemctx );
1047         if ( !BER_BVISNULL( &opc->sndn ))
1048                 op->o_tmpfree( opc->sndn.bv_val, op->o_tmpmemctx );
1049         if ( !BER_BVISNULL( &opc->sdn ))
1050                 op->o_tmpfree( opc->sdn.bv_val, op->o_tmpmemctx );
1051         op->o_callback = cb->sc_next;
1052         op->o_tmpfree(cb, op->o_tmpmemctx);
1053
1054         return 0;
1055 }
1056
1057 static void
1058 syncprov_checkpoint( Operation *op, SlapReply *rs, slap_overinst *on )
1059 {
1060         syncprov_info_t         *si = on->on_bi.bi_private;
1061         Modifications mod;
1062         Operation opm;
1063         struct berval bv[2];
1064         BackendInfo *orig;
1065         slap_callback cb = {0};
1066
1067         mod.sml_values = bv;
1068         bv[1].bv_val = NULL;
1069         bv[0] = si->si_ctxcsn;
1070         mod.sml_nvalues = NULL;
1071         mod.sml_desc = slap_schema.si_ad_contextCSN;
1072         mod.sml_op = LDAP_MOD_REPLACE;
1073         mod.sml_next = NULL;
1074
1075         cb.sc_response = slap_null_cb;
1076         opm = *op;
1077         opm.o_tag = LDAP_REQ_MODIFY;
1078         opm.o_callback = &cb;
1079         opm.orm_modlist = &mod;
1080         opm.o_req_dn = op->o_bd->be_suffix[0];
1081         opm.o_req_ndn = op->o_bd->be_nsuffix[0];
1082         orig = opm.o_bd->bd_info;
1083         opm.o_bd->bd_info = on->on_info->oi_orig;
1084         opm.o_bd->be_modify( &opm, rs );
1085 }
1086
1087 static void
1088 syncprov_add_slog( Operation *op, struct berval *csn )
1089 {
1090         opcookie *opc = op->o_callback->sc_private;
1091         slap_overinst *on = opc->son;
1092         syncprov_info_t         *si = on->on_bi.bi_private;
1093         sessionlog *sl;
1094         slog_entry *se;
1095
1096         sl = si->si_logs;
1097         {
1098                 /* Allocate a record. UUIDs are not NUL-terminated. */
1099                 se = ch_malloc( sizeof( slog_entry ) + opc->suuid.bv_len +
1100                         csn->bv_len + 1 );
1101                 se->se_next = NULL;
1102                 se->se_tag = op->o_tag;
1103
1104                 se->se_uuid.bv_val = (char *)(se+1);
1105                 se->se_csn.bv_val = se->se_uuid.bv_val + opc->suuid.bv_len + 1;
1106                 AC_MEMCPY( se->se_uuid.bv_val, opc->suuid.bv_val, opc->suuid.bv_len );
1107                 se->se_uuid.bv_len = opc->suuid.bv_len;
1108
1109                 AC_MEMCPY( se->se_csn.bv_val, csn->bv_val, csn->bv_len );
1110                 se->se_csn.bv_val[csn->bv_len] = '\0';
1111                 se->se_csn.bv_len = csn->bv_len;
1112
1113                 ldap_pvt_thread_mutex_lock( &sl->sl_mutex );
1114                 if ( sl->sl_head ) {
1115                         sl->sl_tail->se_next = se;
1116                 } else {
1117                         sl->sl_head = se;
1118                 }
1119                 sl->sl_tail = se;
1120                 sl->sl_num++;
1121                 while ( sl->sl_num > sl->sl_size ) {
1122                         se = sl->sl_head;
1123                         sl->sl_head = se->se_next;
1124                         strcpy( sl->sl_mincsn.bv_val, se->se_csn.bv_val );
1125                         sl->sl_mincsn.bv_len = se->se_csn.bv_len;
1126                         ch_free( se );
1127                         sl->sl_num--;
1128                         if ( !sl->sl_head ) {
1129                                 sl->sl_tail = NULL;
1130                         }
1131                 }
1132                 ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
1133         }
1134 }
1135
1136 /* Just set a flag if we found the matching entry */
1137 static int
1138 playlog_cb( Operation *op, SlapReply *rs )
1139 {
1140         if ( rs->sr_type == REP_SEARCH ) {
1141                 op->o_callback->sc_private = (void *)1;
1142         }
1143         return rs->sr_err;
1144 }
1145
1146 /* enter with sl->sl_mutex locked, release before returning */
1147 static void
1148 syncprov_playlog( Operation *op, SlapReply *rs, sessionlog *sl,
1149         struct berval *oldcsn, struct berval *ctxcsn )
1150 {
1151         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
1152         syncprov_info_t         *si = on->on_bi.bi_private;
1153         slog_entry *se;
1154         int i, j, ndel, num, nmods, mmods;
1155         BerVarray uuids;
1156
1157         if ( !sl->sl_num ) {
1158                 ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
1159                 return;
1160         }
1161
1162         num = sl->sl_num;
1163         i = 0;
1164         nmods = 0;
1165
1166         uuids = op->o_tmpalloc( (num+1) * sizeof( struct berval ) +
1167                 num * UUID_LEN, op->o_tmpmemctx );
1168
1169         uuids[0].bv_val = (char *)(uuids + num + 1);
1170
1171         /* Make a copy of the relevant UUIDs. Put the Deletes up front
1172          * and everything else at the end. Do this first so we can
1173          * unlock the list mutex.
1174          */
1175         for ( se=sl->sl_head; se; se=se->se_next ) {
1176                 if ( ber_bvcmp( &se->se_csn, oldcsn ) < 0 ) continue;
1177                 if ( ber_bvcmp( &se->se_csn, ctxcsn ) > 0 ) break;
1178                 if ( se->se_tag == LDAP_REQ_DELETE ) {
1179                         j = i;
1180                         i++;
1181                 } else {
1182                         nmods++;
1183                         j = num - nmods;
1184                 }
1185                 uuids[j].bv_val = uuids[0].bv_val + (j * UUID_LEN);
1186                 AC_MEMCPY(uuids[j].bv_val, se->se_uuid.bv_val, UUID_LEN);
1187                 uuids[j].bv_len = UUID_LEN;
1188         }
1189         ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
1190
1191         ndel = i;
1192
1193         /* Zero out unused slots */
1194         for ( i=ndel; i < num - nmods; i++ )
1195                 uuids[i].bv_len = 0;
1196
1197         /* Mods must be validated to see if they belong in this delete set.
1198          */
1199
1200         mmods = nmods;
1201         /* Strip any duplicates */
1202         for ( i=0; i<nmods; i++ ) {
1203                 for ( j=0; j<ndel; j++ ) {
1204                         if ( bvmatch( &uuids[j], &uuids[num - 1 - i] )) {
1205                                 uuids[num - 1 - i].bv_len = 0;
1206                                 mmods --;
1207                                 break;
1208                         }
1209                 }
1210                 if ( uuids[num - 1 - i].bv_len == 0 ) continue;
1211                 for ( j=0; j<i; j++ ) {
1212                         if ( bvmatch( &uuids[num - 1 - j], &uuids[num - 1 - i] )) {
1213                                 uuids[num - 1 - i].bv_len = 0;
1214                                 mmods --;
1215                                 break;
1216                         }
1217                 }
1218         }
1219
1220         if ( mmods ) {
1221                 Operation fop;
1222                 SlapReply frs = { REP_RESULT };
1223                 int rc;
1224                 Filter mf, af;
1225                 AttributeAssertion eq;
1226                 slap_callback cb = {0};
1227
1228                 fop = *op;
1229
1230                 fop.o_sync_mode = 0;
1231                 fop.o_callback = &cb;
1232                 fop.ors_limit = NULL;
1233                 fop.ors_tlimit = SLAP_NO_LIMIT;
1234                 fop.ors_attrs = slap_anlist_all_attributes;
1235                 fop.ors_attrsonly = 0;
1236                 fop.o_managedsait = SLAP_CONTROL_CRITICAL;
1237
1238                 af.f_choice = LDAP_FILTER_AND;
1239                 af.f_next = NULL;
1240                 af.f_and = &mf;
1241                 mf.f_choice = LDAP_FILTER_EQUALITY;
1242                 mf.f_ava = &eq;
1243                 mf.f_av_desc = slap_schema.si_ad_entryUUID;
1244                 mf.f_next = fop.ors_filter;
1245
1246                 fop.ors_filter = &af;
1247
1248                 cb.sc_response = playlog_cb;
1249                 fop.o_bd->bd_info = on->on_info->oi_orig;
1250
1251                 for ( i=ndel; i<num; i++ ) {
1252                         if ( uuids[i].bv_len == 0 ) continue;
1253
1254                         mf.f_av_value = uuids[i];
1255                         cb.sc_private = NULL;
1256                         fop.ors_slimit = 1;
1257                         rc = fop.o_bd->be_search( &fop, &frs );
1258
1259                         /* If entry was not found, add to delete list */
1260                         if ( !cb.sc_private ) {
1261                                 uuids[ndel++] = uuids[i];
1262                         }
1263                 }
1264                 fop.o_bd->bd_info = (BackendInfo *)on;
1265         }
1266         if ( ndel ) {
1267                 uuids[ndel].bv_val = NULL;
1268                 syncprov_sendinfo( op, rs, LDAP_TAG_SYNC_ID_SET, NULL, 0, uuids, 1 );
1269         }
1270 }
1271
1272 static int
1273 syncprov_op_response( Operation *op, SlapReply *rs )
1274 {
1275         opcookie *opc = op->o_callback->sc_private;
1276         slap_overinst *on = opc->son;
1277         syncprov_info_t         *si = on->on_bi.bi_private;
1278         syncmatches *sm;
1279
1280         if ( rs->sr_err == LDAP_SUCCESS )
1281         {
1282                 struct berval maxcsn = BER_BVNULL, curcsn = BER_BVNULL;
1283                 char cbuf[LDAP_LUTIL_CSNSTR_BUFSIZE];
1284
1285                 /* Update our context CSN */
1286                 cbuf[0] = '\0';
1287                 ldap_pvt_thread_mutex_lock( &si->si_csn_mutex );
1288                 slap_get_commit_csn( op, &maxcsn, &curcsn );
1289                 if ( !BER_BVISNULL( &maxcsn ) ) {
1290                         strcpy( cbuf, maxcsn.bv_val );
1291                         if ( ber_bvcmp( &maxcsn, &si->si_ctxcsn ) > 0 ) {
1292                                 strcpy( si->si_ctxcsnbuf, cbuf );
1293                                 si->si_ctxcsn.bv_len = maxcsn.bv_len;
1294                         }
1295                 }
1296
1297                 /* Don't do any processing for consumer contextCSN updates */
1298                 if ( SLAP_SYNC_SHADOW( op->o_bd ) &&
1299                         op->o_msgid == SLAP_SYNC_UPDATE_MSGID ) {
1300                         ldap_pvt_thread_mutex_unlock( &si->si_csn_mutex );
1301                         return SLAP_CB_CONTINUE;
1302                 }
1303
1304                 si->si_numops++;
1305                 if ( si->si_chkops || si->si_chktime ) {
1306                         int do_check=0;
1307                         if ( si->si_chkops && si->si_numops >= si->si_chkops ) {
1308                                 do_check = 1;
1309                                 si->si_numops = 0;
1310                         }
1311                         if ( si->si_chktime &&
1312                                 (op->o_time - si->si_chklast >= si->si_chktime )) {
1313                                 do_check = 1;
1314                                 si->si_chklast = op->o_time;
1315                         }
1316                         if ( do_check ) {
1317                                 syncprov_checkpoint( op, rs, on );
1318                         }
1319                 }
1320                 ldap_pvt_thread_mutex_unlock( &si->si_csn_mutex );
1321
1322                 opc->sctxcsn.bv_len = maxcsn.bv_len;
1323                 opc->sctxcsn.bv_val = cbuf;
1324
1325                 /* Handle any persistent searches */
1326                 if ( si->si_ops ) {
1327                         switch(op->o_tag) {
1328                         case LDAP_REQ_ADD:
1329                         case LDAP_REQ_MODIFY:
1330                         case LDAP_REQ_MODRDN:
1331                         case LDAP_REQ_EXTENDED:
1332                                 syncprov_matchops( op, opc, 0 );
1333                                 break;
1334                         case LDAP_REQ_DELETE:
1335                                 /* for each match in opc->smatches:
1336                                  *   send DELETE msg
1337                                  */
1338                                 ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
1339                                 for ( sm = opc->smatches; sm; sm=sm->sm_next ) {
1340                                         if ( sm->sm_op->s_op->o_abandon )
1341                                                 continue;
1342                                         syncprov_sendresp( op, opc, sm->sm_op, NULL,
1343                                                 LDAP_SYNC_DELETE, 1 );
1344                                 }
1345                                 ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
1346                                 break;
1347                         }
1348                 }
1349
1350                 /* Add any log records */
1351                 if ( si->si_logs && op->o_tag != LDAP_REQ_ADD ) {
1352                         syncprov_add_slog( op, &curcsn );
1353                 }
1354
1355         }
1356         return SLAP_CB_CONTINUE;
1357 }
1358
1359 /* We don't use a subentry to store the context CSN any more.
1360  * We expose the current context CSN as an operational attribute
1361  * of the suffix entry.
1362  */
1363 static int
1364 syncprov_op_compare( Operation *op, SlapReply *rs )
1365 {
1366         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
1367         syncprov_info_t         *si = on->on_bi.bi_private;
1368         int rc = SLAP_CB_CONTINUE;
1369
1370         if ( dn_match( &op->o_req_ndn, op->o_bd->be_nsuffix ) &&
1371                 op->oq_compare.rs_ava->aa_desc == slap_schema.si_ad_contextCSN )
1372         {
1373                 Entry e = {0};
1374                 Attribute a = {0};
1375                 struct berval bv[2];
1376
1377                 e.e_name = op->o_bd->be_suffix[0];
1378                 e.e_nname = op->o_bd->be_nsuffix[0];
1379
1380                 BER_BVZERO( &bv[1] );
1381                 bv[0] = si->si_ctxcsn;
1382
1383                 a.a_desc = slap_schema.si_ad_contextCSN;
1384                 a.a_vals = bv;
1385                 a.a_nvals = a.a_vals;
1386
1387                 ldap_pvt_thread_mutex_lock( &si->si_csn_mutex );
1388
1389                 rs->sr_err = access_allowed( op, &e, op->oq_compare.rs_ava->aa_desc,
1390                         &op->oq_compare.rs_ava->aa_value, ACL_COMPARE, NULL );
1391                 if ( ! rs->sr_err ) {
1392                         rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
1393                         goto return_results;
1394                 }
1395
1396                 if ( get_assert( op ) &&
1397                         ( test_filter( op, &e, get_assertion( op ) ) != LDAP_COMPARE_TRUE ) )
1398                 {
1399                         rs->sr_err = LDAP_ASSERTION_FAILED;
1400                         goto return_results;
1401                 }
1402
1403
1404                 rs->sr_err = LDAP_COMPARE_FALSE;
1405
1406                 if ( value_find_ex( op->oq_compare.rs_ava->aa_desc,
1407                         SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
1408                                 SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
1409                                 a.a_nvals, &op->oq_compare.rs_ava->aa_value, op->o_tmpmemctx ) == 0 )
1410                 {
1411                         rs->sr_err = LDAP_COMPARE_TRUE;
1412                 }
1413
1414 return_results:;
1415
1416                 ldap_pvt_thread_mutex_unlock( &si->si_csn_mutex );
1417
1418                 send_ldap_result( op, rs );
1419
1420                 if( rs->sr_err == LDAP_COMPARE_FALSE || rs->sr_err == LDAP_COMPARE_TRUE ) {
1421                         rs->sr_err = LDAP_SUCCESS;
1422                 }
1423                 rc = rs->sr_err;
1424         }
1425
1426         return rc;
1427 }
1428
1429 static int
1430 syncprov_op_mod( Operation *op, SlapReply *rs )
1431 {
1432         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
1433         syncprov_info_t         *si = on->on_bi.bi_private;
1434
1435         slap_callback *cb = op->o_tmpcalloc(1, sizeof(slap_callback)+
1436                 sizeof(opcookie) +
1437                 (si->si_ops ? sizeof(modinst) : 0 ),
1438                 op->o_tmpmemctx);
1439         opcookie *opc = (opcookie *)(cb+1);
1440         opc->son = on;
1441         cb->sc_response = syncprov_op_response;
1442         cb->sc_cleanup = syncprov_op_cleanup;
1443         cb->sc_private = opc;
1444         cb->sc_next = op->o_callback;
1445         op->o_callback = cb;
1446
1447         /* If there are active persistent searches, lock this operation.
1448          * See seqmod.c for the locking logic on its own.
1449          */
1450         if ( si->si_ops ) {
1451                 modtarget *mt, mtdummy;
1452                 modinst *mi;
1453
1454                 mi = (modinst *)(opc+1);
1455                 mi->mi_op = op;
1456
1457                 /* See if we're already modifying this entry... */
1458                 mtdummy.mt_op = op;
1459                 ldap_pvt_thread_mutex_lock( &si->si_mods_mutex );
1460                 mt = avl_find( si->si_mods, &mtdummy, sp_avl_cmp );
1461                 if ( mt ) {
1462                         ldap_pvt_thread_mutex_lock( &mt->mt_mutex );
1463                         ldap_pvt_thread_mutex_unlock( &si->si_mods_mutex );
1464                         mt->mt_tail->mi_next = mi;
1465                         mt->mt_tail = mi;
1466                         /* wait for this op to get to head of list */
1467                         while ( mt->mt_mods != mi ) {
1468                                 ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
1469                                 ldap_pvt_thread_yield();
1470                                 ldap_pvt_thread_mutex_lock( &mt->mt_mutex );
1471                         }
1472                         ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
1473                 } else {
1474                         /* Record that we're modifying this entry now */
1475                         mt = ch_malloc( sizeof(modtarget) );
1476                         mt->mt_mods = mi;
1477                         mt->mt_tail = mi;
1478                         mt->mt_op = mi->mi_op;
1479                         ldap_pvt_thread_mutex_init( &mt->mt_mutex );
1480                         avl_insert( &si->si_mods, mt, sp_avl_cmp, avl_dup_error );
1481                         ldap_pvt_thread_mutex_unlock( &si->si_mods_mutex );
1482                 }
1483         }
1484
1485         if (( si->si_ops || si->si_logs ) && op->o_tag != LDAP_REQ_ADD )
1486                 syncprov_matchops( op, opc, 1 );
1487
1488
1489         return SLAP_CB_CONTINUE;
1490 }
1491
1492 static int
1493 syncprov_op_extended( Operation *op, SlapReply *rs )
1494 {
1495         if ( exop_is_write( op ))
1496                 return syncprov_op_mod( op, rs );
1497
1498         return SLAP_CB_CONTINUE;
1499 }
1500
1501 typedef struct searchstate {
1502         slap_overinst *ss_on;
1503         syncops *ss_so;
1504         int ss_present;
1505 } searchstate;
1506
1507 static int
1508 syncprov_search_cleanup( Operation *op, SlapReply *rs )
1509 {
1510         if ( rs->sr_ctrls ) {
1511                 op->o_tmpfree( rs->sr_ctrls[0], op->o_tmpmemctx );
1512                 op->o_tmpfree( rs->sr_ctrls, op->o_tmpmemctx );
1513                 rs->sr_ctrls = NULL;
1514         }
1515         return 0;
1516 }
1517
1518 static void
1519 syncprov_detach_op( Operation *op, syncops *so )
1520 {
1521         Operation *op2;
1522         int i, alen = 0;
1523         size_t size;
1524         char *ptr;
1525         GroupAssertion *g1, *g2;
1526
1527         /* count the search attrs */
1528         for (i=0; op->ors_attrs && !BER_BVISNULL( &op->ors_attrs[i].an_name ); i++) {
1529                 alen += op->ors_attrs[i].an_name.bv_len + 1;
1530         }
1531         /* Make a new copy of the operation */
1532         size = sizeof(Operation) + sizeof(Opheader) +
1533                 (i ? ( (i+1) * sizeof(AttributeName) + alen) : 0) +
1534                 op->o_req_dn.bv_len + 1 +
1535                 op->o_req_ndn.bv_len + 1 +
1536                 op->o_ndn.bv_len + 1 +
1537                 so->s_filterstr.bv_len + 1;
1538         op2 = (Operation *)ch_calloc( 1, size );
1539         op2->o_hdr = (Opheader *)(op2+1);
1540
1541         /* Copy the fields we care about explicitly, leave the rest alone */
1542         *op2->o_hdr = *op->o_hdr;
1543         op2->o_tag = op->o_tag;
1544         op2->o_time = op->o_time;
1545         op2->o_bd = op->o_bd;
1546         op2->o_request = op->o_request;
1547
1548         if ( i ) {
1549                 op2->ors_attrs = (AttributeName *)(op2->o_hdr + 1);
1550                 ptr = (char *)(op2->ors_attrs+i+1);
1551                 for (i=0; !BER_BVISNULL( &op->ors_attrs[i].an_name ); i++) {
1552                         op2->ors_attrs[i] = op->ors_attrs[i];
1553                         op2->ors_attrs[i].an_name.bv_val = ptr;
1554                         ptr = lutil_strcopy( ptr, op->ors_attrs[i].an_name.bv_val ) + 1;
1555                 }
1556                 BER_BVZERO( &op2->ors_attrs[i].an_name );
1557         } else {
1558                 ptr = (char *)(op2->o_hdr + 1);
1559         }
1560         op2->o_authz = op->o_authz;
1561         op2->o_ndn.bv_val = ptr;
1562         ptr = lutil_strcopy(ptr, op->o_ndn.bv_val) + 1;
1563         op2->o_dn = op2->o_ndn;
1564         op2->o_req_dn.bv_len = op->o_req_dn.bv_len;
1565         op2->o_req_dn.bv_val = ptr;
1566         ptr = lutil_strcopy(ptr, op->o_req_dn.bv_val) + 1;
1567         op2->o_req_ndn.bv_len = op->o_req_ndn.bv_len;
1568         op2->o_req_ndn.bv_val = ptr;
1569         ptr = lutil_strcopy(ptr, op->o_req_ndn.bv_val) + 1;
1570         op2->ors_filterstr.bv_val = ptr;
1571         strcpy( ptr, so->s_filterstr.bv_val );
1572         op2->ors_filterstr.bv_len = so->s_filterstr.bv_len;
1573         op2->ors_filter = str2filter( ptr );
1574         so->s_op = op2;
1575
1576         /* Copy any cached group ACLs individually */
1577         op2->o_groups = NULL;
1578         for ( g1=op->o_groups; g1; g1=g1->ga_next ) {
1579                 g2 = ch_malloc( sizeof(GroupAssertion) + g1->ga_len );
1580                 *g2 = *g1;
1581                 strcpy( g2->ga_ndn, g1->ga_ndn );
1582                 g2->ga_next = op2->o_groups;
1583                 op2->o_groups = g2;
1584         }
1585
1586         /* Add op2 to conn so abandon will find us */
1587         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1588         op->o_conn->c_n_ops_executing++;
1589         op->o_conn->c_n_ops_completed--;
1590         LDAP_STAILQ_INSERT_TAIL( &op->o_conn->c_ops, op2, o_next );
1591         so->s_flags |= PS_IS_DETACHED;
1592         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1593 }
1594
1595 static int
1596 syncprov_search_response( Operation *op, SlapReply *rs )
1597 {
1598         searchstate *ss = op->o_callback->sc_private;
1599         slap_overinst *on = ss->ss_on;
1600         syncprov_info_t         *si = on->on_bi.bi_private;
1601         sync_control *srs = op->o_controls[slap_cids.sc_LDAPsync];
1602
1603         if ( rs->sr_type == REP_SEARCH || rs->sr_type == REP_SEARCHREF ) {
1604                 int i;
1605                 /* If we got a referral without a referral object, there's
1606                  * something missing that we cannot replicate. Just ignore it.
1607                  * The consumer will abort because we didn't send the expected
1608                  * control.
1609                  */
1610                 if ( !rs->sr_entry ) {
1611                         assert( rs->sr_entry );
1612                         Debug( LDAP_DEBUG_ANY, "bogus referral in context\n",0,0,0 );
1613                         return SLAP_CB_CONTINUE;
1614                 }
1615                 if ( !BER_BVISNULL( &srs->sr_state.ctxcsn )) {
1616                         Attribute *a = attr_find( rs->sr_entry->e_attrs,
1617                                 slap_schema.si_ad_entryCSN );
1618
1619                         /* Don't send the ctx entry twice */
1620                         if ( a && bvmatch( &a->a_nvals[0], &srs->sr_state.ctxcsn ) )
1621                                 return LDAP_SUCCESS;
1622                 }
1623                 rs->sr_ctrls = op->o_tmpalloc( sizeof(LDAPControl *)*2,
1624                         op->o_tmpmemctx );
1625                 rs->sr_ctrls[1] = NULL;
1626                 rs->sr_err = syncprov_state_ctrl( op, rs, rs->sr_entry,
1627                         LDAP_SYNC_ADD, rs->sr_ctrls, 0, 0, NULL );
1628         } else if ( rs->sr_type == REP_RESULT && rs->sr_err == LDAP_SUCCESS ) {
1629                 struct berval cookie;
1630
1631                 slap_compose_sync_cookie( op, &cookie,
1632                         &op->ors_filter->f_and->f_ava->aa_value,
1633                         srs->sr_state.rid );
1634
1635                 /* Is this a regular refresh? */
1636                 if ( !ss->ss_so ) {
1637                         rs->sr_ctrls = op->o_tmpalloc( sizeof(LDAPControl *)*2,
1638                                 op->o_tmpmemctx );
1639                         rs->sr_ctrls[1] = NULL;
1640                         rs->sr_err = syncprov_done_ctrl( op, rs, rs->sr_ctrls,
1641                                 0, 1, &cookie, ss->ss_present ?  LDAP_SYNC_REFRESH_PRESENTS :
1642                                         LDAP_SYNC_REFRESH_DELETES );
1643                 } else {
1644                         int locked = 0;
1645                 /* It's RefreshAndPersist, transition to Persist phase */
1646                         syncprov_sendinfo( op, rs, ( ss->ss_present && rs->sr_nentries ) ?
1647                                 LDAP_TAG_SYNC_REFRESH_PRESENT : LDAP_TAG_SYNC_REFRESH_DELETE,
1648                                 &cookie, 1, NULL, 0 );
1649                         /* Flush any queued persist messages */
1650                         if ( ss->ss_so->s_res ) {
1651                                 syncres *sr, *srnext;
1652                                 Entry *e;
1653                                 opcookie opc;
1654
1655                                 opc.son = on;
1656                                 ldap_pvt_thread_mutex_lock( &ss->ss_so->s_mutex );
1657                                 locked = 1;
1658                                 for (sr = ss->ss_so->s_res; sr; sr=srnext) {
1659                                         int rc = LDAP_SUCCESS;
1660                                         srnext = sr->s_next;
1661                                         opc.sdn = sr->s_dn;
1662                                         opc.sndn = sr->s_ndn;
1663                                         opc.suuid = sr->s_uuid;
1664                                         opc.sctxcsn = sr->s_csn;
1665                                         opc.sreference = sr->s_isreference;
1666                                         e = NULL;
1667
1668                                         if ( sr->s_mode != LDAP_SYNC_DELETE ) {
1669                                                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
1670                                                 rc = be_entry_get_rw( op, &opc.sndn, NULL, NULL, 0, &e );
1671                                                 op->o_bd->bd_info = (BackendInfo *)on;
1672                                         }
1673                                         if ( rc == LDAP_SUCCESS )
1674                                                 syncprov_sendresp( op, &opc, ss->ss_so, e,
1675                                                         sr->s_mode, 0 );
1676
1677                                         if ( e ) {
1678                                                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
1679                                                 be_entry_release_rw( op, e, 0 );
1680                                                 op->o_bd->bd_info = (BackendInfo *)on;
1681                                         }
1682                                         ch_free( sr );
1683                                 }
1684                                 ss->ss_so->s_res = NULL;
1685                                 ss->ss_so->s_restail = NULL;
1686                         }
1687
1688                         /* Turn off the refreshing flag */
1689                         ss->ss_so->s_flags ^= PS_IS_REFRESHING;
1690                         if ( locked )
1691                                 ldap_pvt_thread_mutex_unlock( &ss->ss_so->s_mutex );
1692
1693                         /* Detach this Op from frontend control */
1694                         syncprov_detach_op( op, ss->ss_so );
1695
1696                         return LDAP_SUCCESS;
1697                 }
1698         }
1699
1700         return SLAP_CB_CONTINUE;
1701 }
1702
1703 static int
1704 syncprov_op_search( Operation *op, SlapReply *rs )
1705 {
1706         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
1707         syncprov_info_t         *si = (syncprov_info_t *)on->on_bi.bi_private;
1708         slap_callback   *cb;
1709         int gotstate = 0, nochange = 0, do_present = 1;
1710         Filter *fand, *fava;
1711         syncops *sop = NULL;
1712         searchstate *ss;
1713         sync_control *srs;
1714         struct berval ctxcsn;
1715         char csnbuf[LDAP_LUTIL_CSNSTR_BUFSIZE];
1716
1717         if ( !(op->o_sync_mode & SLAP_SYNC_REFRESH) ) return SLAP_CB_CONTINUE;
1718
1719         if ( op->ors_deref & LDAP_DEREF_SEARCHING ) {
1720                 send_ldap_error( op, rs, LDAP_PROTOCOL_ERROR, "illegal value for derefAliases" );
1721                 return rs->sr_err;
1722         }
1723
1724         srs = op->o_controls[slap_cids.sc_LDAPsync];
1725
1726         /* If this is a persistent search, set it up right away */
1727         if ( op->o_sync_mode & SLAP_SYNC_PERSIST ) {
1728                 syncops so = {0};
1729                 fbase_cookie fc;
1730                 opcookie opc;
1731                 slap_callback sc;
1732
1733                 fc.fss = &so;
1734                 fc.fbase = 0;
1735                 so.s_eid = NOID;
1736                 so.s_op = op;
1737                 so.s_flags = PS_IS_REFRESHING;
1738                 /* syncprov_findbase expects to be called as a callback... */
1739                 sc.sc_private = &opc;
1740                 opc.son = on;
1741                 cb = op->o_callback;
1742                 op->o_callback = &sc;
1743                 rs->sr_err = syncprov_findbase( op, &fc );
1744                 op->o_callback = cb;
1745
1746                 if ( rs->sr_err != LDAP_SUCCESS ) {
1747                         send_ldap_result( op, rs );
1748                         return rs->sr_err;
1749                 }
1750                 sop = ch_malloc( sizeof( syncops ));
1751                 *sop = so;
1752                 ldap_pvt_thread_mutex_init( &sop->s_mutex );
1753                 sop->s_rid = srs->sr_state.rid;
1754                 sop->s_inuse = 1;
1755
1756                 ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
1757                 sop->s_next = si->si_ops;
1758                 si->si_ops = sop;
1759                 ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
1760         }
1761
1762         /* snapshot the ctxcsn */
1763         ldap_pvt_thread_mutex_lock( &si->si_csn_mutex );
1764         strcpy( csnbuf, si->si_ctxcsnbuf );
1765         ctxcsn.bv_len = si->si_ctxcsn.bv_len;
1766         ldap_pvt_thread_mutex_unlock( &si->si_csn_mutex );
1767         ctxcsn.bv_val = csnbuf;
1768
1769         /* If we have a cookie, handle the PRESENT lookups */
1770         if ( !BER_BVISNULL( &srs->sr_state.ctxcsn )) {
1771                 sessionlog *sl;
1772
1773                 /* The cookie was validated when it was parsed, just use it */
1774
1775                 /* If just Refreshing and nothing has changed, shortcut it */
1776                 if ( bvmatch( &srs->sr_state.ctxcsn, &ctxcsn )) {
1777                         nochange = 1;
1778                         if ( !(op->o_sync_mode & SLAP_SYNC_PERSIST) ) {
1779                                 LDAPControl     *ctrls[2];
1780
1781                                 ctrls[0] = NULL;
1782                                 ctrls[1] = NULL;
1783                                 syncprov_done_ctrl( op, rs, ctrls, 0, 0,
1784                                         NULL, LDAP_SYNC_REFRESH_DELETES );
1785                                 rs->sr_ctrls = ctrls;
1786                                 rs->sr_err = LDAP_SUCCESS;
1787                                 send_ldap_result( op, rs );
1788                                 rs->sr_ctrls = NULL;
1789                                 return rs->sr_err;
1790                         }
1791                         goto shortcut;
1792                 }
1793                 /* Do we have a sessionlog for this search? */
1794                 sl=si->si_logs;
1795                 if ( sl ) {
1796                         ldap_pvt_thread_mutex_lock( &sl->sl_mutex );
1797                         if ( ber_bvcmp( &srs->sr_state.ctxcsn, &sl->sl_mincsn ) >= 0 ) {
1798                                 do_present = 0;
1799                                 /* mutex is unlocked in playlog */
1800                                 syncprov_playlog( op, rs, sl, &srs->sr_state.ctxcsn, &ctxcsn );
1801                         } else {
1802                                 ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
1803                         }
1804                 }
1805                 /* Is the CSN still present in the database? */
1806                 if ( syncprov_findcsn( op, FIND_CSN ) != LDAP_SUCCESS ) {
1807                         /* No, so a reload is required */
1808 #if 0           /* the consumer doesn't seem to send this hint */
1809                         if ( op->o_sync_rhint == 0 ) {
1810                                 send_ldap_error( op, rs, LDAP_SYNC_REFRESH_REQUIRED, "sync cookie is stale" );
1811                                 return rs->sr_err;
1812                         }
1813 #endif
1814                 } else {
1815                         gotstate = 1;
1816                         /* If changed and doing Present lookup, send Present UUIDs */
1817                         if ( do_present && syncprov_findcsn( op, FIND_PRESENT ) !=
1818                                 LDAP_SUCCESS ) {
1819                                 send_ldap_result( op, rs );
1820                                 return rs->sr_err;
1821                         }
1822                 }
1823         }
1824
1825 shortcut:
1826         /* Append CSN range to search filter, save original filter
1827          * for persistent search evaluation
1828          */
1829         if ( sop ) {
1830                 sop->s_filterstr= op->ors_filterstr;
1831         }
1832
1833         fand = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
1834         fand->f_choice = LDAP_FILTER_AND;
1835         fand->f_next = NULL;
1836         fava = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
1837         fava->f_choice = LDAP_FILTER_LE;
1838         fava->f_ava = op->o_tmpalloc( sizeof(AttributeAssertion), op->o_tmpmemctx );
1839         fava->f_ava->aa_desc = slap_schema.si_ad_entryCSN;
1840         ber_dupbv_x( &fava->f_ava->aa_value, &ctxcsn, op->o_tmpmemctx );
1841         fand->f_and = fava;
1842         if ( gotstate ) {
1843                 fava->f_next = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
1844                 fava = fava->f_next;
1845                 fava->f_choice = LDAP_FILTER_GE;
1846                 fava->f_ava = op->o_tmpalloc( sizeof(AttributeAssertion), op->o_tmpmemctx );
1847                 fava->f_ava->aa_desc = slap_schema.si_ad_entryCSN;
1848                 ber_dupbv_x( &fava->f_ava->aa_value, &srs->sr_state.ctxcsn, op->o_tmpmemctx );
1849         }
1850         fava->f_next = op->ors_filter;
1851         op->ors_filter = fand;
1852         filter2bv_x( op, op->ors_filter, &op->ors_filterstr );
1853
1854         /* Let our callback add needed info to returned entries */
1855         cb = op->o_tmpcalloc(1, sizeof(slap_callback)+sizeof(searchstate), op->o_tmpmemctx);
1856         ss = (searchstate *)(cb+1);
1857         ss->ss_on = on;
1858         ss->ss_so = sop;
1859         ss->ss_present = do_present;
1860         cb->sc_response = syncprov_search_response;
1861         cb->sc_cleanup = syncprov_search_cleanup;
1862         cb->sc_private = ss;
1863         cb->sc_next = op->o_callback;
1864         op->o_callback = cb;
1865
1866 #if 0   /* I don't think we need to shortcircuit back-bdb any more */
1867         op->o_sync_mode &= SLAP_CONTROL_MASK;
1868 #endif
1869
1870         /* If this is a persistent search and no changes were reported during
1871          * the refresh phase, just invoke the response callback to transition
1872          * us into persist phase
1873          */
1874         if ( nochange ) {
1875                 rs->sr_err = LDAP_SUCCESS;
1876                 rs->sr_nentries = 0;
1877                 send_ldap_result( op, rs );
1878                 return rs->sr_err;
1879         }
1880         return SLAP_CB_CONTINUE;
1881 }
1882
1883 static int
1884 syncprov_operational(
1885         Operation *op,
1886         SlapReply *rs )
1887 {
1888         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
1889         syncprov_info_t         *si = (syncprov_info_t *)on->on_bi.bi_private;
1890
1891         if ( rs->sr_entry &&
1892                 dn_match( &rs->sr_entry->e_nname, op->o_bd->be_nsuffix )) {
1893
1894                 if ( SLAP_OPATTRS( rs->sr_attr_flags ) ||
1895                         ad_inlist( slap_schema.si_ad_contextCSN, rs->sr_attrs )) {
1896                         Attribute *a, **ap = NULL;
1897
1898                         for ( a=rs->sr_entry->e_attrs; a; a=a->a_next ) {
1899                                 if ( a->a_desc == slap_schema.si_ad_contextCSN )
1900                                         break;
1901                         }
1902
1903                         if ( !a ) {
1904                                 for ( ap = &rs->sr_operational_attrs; *ap; ap=&(*ap)->a_next );
1905
1906                                 a = ch_malloc( sizeof(Attribute));
1907                                 a->a_desc = slap_schema.si_ad_contextCSN;
1908                                 a->a_vals = ch_malloc( 2 * sizeof(struct berval));
1909                                 a->a_vals[1].bv_val = NULL;
1910                                 a->a_nvals = a->a_vals;
1911                                 a->a_next = NULL;
1912                                 a->a_flags = 0;
1913                                 *ap = a;
1914                         }
1915
1916                         ldap_pvt_thread_mutex_lock( &si->si_csn_mutex );
1917                         if ( !ap ) {
1918                                 strcpy( a->a_vals[0].bv_val, si->si_ctxcsnbuf );
1919                         } else {
1920                                 ber_dupbv( &a->a_vals[0], &si->si_ctxcsn );
1921                         }
1922                         ldap_pvt_thread_mutex_unlock( &si->si_csn_mutex );
1923                 }
1924         }
1925         return SLAP_CB_CONTINUE;
1926 }
1927
1928 static int
1929 syncprov_db_config(
1930         BackendDB       *be,
1931         const char      *fname,
1932         int             lineno,
1933         int             argc,
1934         char    **argv
1935 )
1936 {
1937         slap_overinst           *on = (slap_overinst *)be->bd_info;
1938         syncprov_info_t         *si = (syncprov_info_t *)on->on_bi.bi_private;
1939
1940         if ( strcasecmp( argv[ 0 ], "syncprov-checkpoint" ) == 0 ) {
1941                 if ( argc != 3 ) {
1942                         fprintf( stderr, "%s: line %d: wrong number of arguments in "
1943                                 "\"syncprov-checkpoint <ops> <minutes>\"\n", fname, lineno );
1944                         return -1;
1945                 }
1946                 si->si_chkops = atoi( argv[1] );
1947                 si->si_chktime = atoi( argv[2] ) * 60;
1948                 return 0;
1949
1950         } else if ( strcasecmp( argv[0], "syncprov-sessionlog" ) == 0 ) {
1951                 sessionlog *sl;
1952                 int size;
1953                 if ( argc != 2 ) {
1954                         fprintf( stderr, "%s: line %d: wrong number of arguments in "
1955                                 "\"syncprov-sessionlog <size>\"\n", fname, lineno );
1956                         return -1;
1957                 }
1958                 size = atoi( argv[1] );
1959                 if ( size < 0 ) {
1960                         fprintf( stderr,
1961                                 "%s: line %d: session log size %d is negative\n",
1962                                 fname, lineno, size );
1963                         return -1;
1964                 }
1965                 sl = si->si_logs;
1966                 if ( !sl ) {
1967                         sl = ch_malloc( sizeof( sessionlog ) + LDAP_LUTIL_CSNSTR_BUFSIZE );
1968                         sl->sl_mincsn.bv_val = (char *)(sl+1);
1969                         sl->sl_mincsn.bv_len = 0;
1970                         sl->sl_num = 0;
1971                         sl->sl_head = sl->sl_tail = NULL;
1972                         ldap_pvt_thread_mutex_init( &sl->sl_mutex );
1973                         si->si_logs = sl;
1974                 }
1975                 sl->sl_size = size;
1976                 return 0;
1977         }
1978
1979         return SLAP_CONF_UNKNOWN;
1980 }
1981
1982 /* Cheating - we have no thread pool context for these functions,
1983  * so make one.
1984  */
1985 typedef struct thread_keys {
1986         void *key;
1987         void *data;
1988         ldap_pvt_thread_pool_keyfree_t *xfree;
1989 } thread_keys;
1990
1991 #define MAXKEYS 32
1992 /* A fake thread context */
1993 static thread_keys thrctx[MAXKEYS];
1994
1995 /* Read any existing contextCSN from the underlying db.
1996  * Then search for any entries newer than that. If no value exists,
1997  * just generate it. Cache whatever result.
1998  */
1999 static int
2000 syncprov_db_open(
2001     BackendDB *be
2002 )
2003 {
2004         slap_overinst   *on = (slap_overinst *) be->bd_info;
2005         syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
2006
2007         Connection conn;
2008         char opbuf[OPERATION_BUFFER_SIZE];
2009         char ctxcsnbuf[LDAP_LUTIL_CSNSTR_BUFSIZE];
2010         Operation *op = (Operation *)opbuf;
2011         Entry *e;
2012         Attribute *a;
2013         int rc;
2014
2015         connection_fake_init( &conn, op, thrctx );
2016         op->o_bd = be;
2017         op->o_dn = be->be_rootdn;
2018         op->o_ndn = be->be_rootndn;
2019
2020         ctxcsnbuf[0] = '\0';
2021
2022         op->o_bd->bd_info = on->on_info->oi_orig;
2023         rc = be_entry_get_rw( op, be->be_nsuffix, NULL,
2024                 slap_schema.si_ad_contextCSN, 0, &e );
2025
2026         if ( e ) {
2027                 a = attr_find( e->e_attrs, slap_schema.si_ad_contextCSN );
2028                 if ( a ) {
2029                         si->si_ctxcsn.bv_len = a->a_nvals[0].bv_len;
2030                         if ( si->si_ctxcsn.bv_len >= sizeof(si->si_ctxcsnbuf ))
2031                                 si->si_ctxcsn.bv_len = sizeof(si->si_ctxcsnbuf)-1;
2032                         strncpy( si->si_ctxcsnbuf, a->a_nvals[0].bv_val,
2033                                 si->si_ctxcsn.bv_len );
2034                         si->si_ctxcsnbuf[si->si_ctxcsn.bv_len] = '\0';
2035                         strcpy( ctxcsnbuf, si->si_ctxcsnbuf );
2036                 }
2037                 be_entry_release_rw( op, e, 0 );
2038                 op->o_bd->bd_info = (BackendInfo *)on;
2039                 op->o_req_dn = be->be_suffix[0];
2040                 op->o_req_ndn = be->be_nsuffix[0];
2041                 op->ors_scope = LDAP_SCOPE_SUBTREE;
2042                 syncprov_findcsn( op, FIND_MAXCSN );
2043         }
2044
2045         if ( BER_BVISEMPTY( &si->si_ctxcsn ) ) {
2046                 slap_get_csn( op, si->si_ctxcsnbuf, sizeof(si->si_ctxcsnbuf),
2047                                 &si->si_ctxcsn, 0 );
2048         }
2049
2050         /* If our ctxcsn is different from what was read from the root
2051          * entry, write the new value out.
2052          */
2053         if ( strcmp( si->si_ctxcsnbuf, ctxcsnbuf )) {
2054                 SlapReply rs = {REP_RESULT};
2055                 syncprov_checkpoint( op, &rs, on );
2056         }
2057
2058         op->o_bd->bd_info = (BackendInfo *)on;
2059         return 0;
2060 }
2061
2062 /* Write the current contextCSN into the underlying db.
2063  */
2064 static int
2065 syncprov_db_close(
2066     BackendDB *be
2067 )
2068 {
2069     slap_overinst   *on = (slap_overinst *) be->bd_info;
2070     syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
2071         int i;
2072
2073         if ( si->si_numops ) {
2074                 Connection conn;
2075                 char opbuf[OPERATION_BUFFER_SIZE];
2076                 Operation *op = (Operation *)opbuf;
2077                 SlapReply rs = {REP_RESULT};
2078
2079                 connection_fake_init( &conn, op, thrctx );
2080                 op->o_bd = be;
2081                 op->o_dn = be->be_rootdn;
2082                 op->o_ndn = be->be_rootndn;
2083                 syncprov_checkpoint( op, &rs, on );
2084         }
2085         for ( i=0; thrctx[i].key; i++) {
2086                 if ( thrctx[i].xfree )
2087                         thrctx[i].xfree( thrctx[i].key, thrctx[i].data );
2088                 thrctx[i].key = NULL;
2089         }
2090
2091     return 0;
2092 }
2093
2094 static int
2095 syncprov_db_init(
2096         BackendDB *be
2097 )
2098 {
2099         slap_overinst   *on = (slap_overinst *)be->bd_info;
2100         syncprov_info_t *si;
2101
2102         si = ch_calloc(1, sizeof(syncprov_info_t));
2103         on->on_bi.bi_private = si;
2104         ldap_pvt_thread_mutex_init( &si->si_csn_mutex );
2105         ldap_pvt_thread_mutex_init( &si->si_ops_mutex );
2106         ldap_pvt_thread_mutex_init( &si->si_mods_mutex );
2107         si->si_ctxcsn.bv_val = si->si_ctxcsnbuf;
2108
2109         csn_anlist[0].an_desc = slap_schema.si_ad_entryCSN;
2110         csn_anlist[0].an_name = slap_schema.si_ad_entryCSN->ad_cname;
2111
2112         uuid_anlist[0].an_desc = slap_schema.si_ad_entryUUID;
2113         uuid_anlist[0].an_name = slap_schema.si_ad_entryUUID->ad_cname;
2114
2115         return 0;
2116 }
2117
2118 static int
2119 syncprov_db_destroy(
2120         BackendDB *be
2121 )
2122 {
2123         slap_overinst   *on = (slap_overinst *)be->bd_info;
2124         syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
2125
2126         if ( si ) {
2127                 ldap_pvt_thread_mutex_destroy( &si->si_mods_mutex );
2128                 ldap_pvt_thread_mutex_destroy( &si->si_ops_mutex );
2129                 ldap_pvt_thread_mutex_destroy( &si->si_csn_mutex );
2130                 ch_free( si );
2131         }
2132
2133         return 0;
2134 }
2135
2136 static int syncprov_parseCtrl (
2137         Operation *op,
2138         SlapReply *rs,
2139         LDAPControl *ctrl )
2140 {
2141         ber_tag_t tag;
2142         BerElement *ber;
2143         ber_int_t mode;
2144         ber_len_t len;
2145         struct berval cookie = BER_BVNULL;
2146         sync_control *sr;
2147         int rhint = 0;
2148
2149         if ( op->o_sync != SLAP_CONTROL_NONE ) {
2150                 rs->sr_text = "Sync control specified multiple times";
2151                 return LDAP_PROTOCOL_ERROR;
2152         }
2153
2154         if ( op->o_pagedresults != SLAP_CONTROL_NONE ) {
2155                 rs->sr_text = "Sync control specified with pagedResults control";
2156                 return LDAP_PROTOCOL_ERROR;
2157         }
2158
2159         if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
2160                 rs->sr_text = "Sync control value is empty (or absent)";
2161                 return LDAP_PROTOCOL_ERROR;
2162         }
2163
2164         /* Parse the control value
2165          *      syncRequestValue ::= SEQUENCE {
2166          *              mode   ENUMERATED {
2167          *                      -- 0 unused
2168          *                      refreshOnly             (1),
2169          *                      -- 2 reserved
2170          *                      refreshAndPersist       (3)
2171          *              },
2172          *              cookie  syncCookie OPTIONAL
2173          *      }
2174          */
2175
2176         ber = ber_init( &ctrl->ldctl_value );
2177         if( ber == NULL ) {
2178                 rs->sr_text = "internal error";
2179                 return LDAP_OTHER;
2180         }
2181
2182         if ( (tag = ber_scanf( ber, "{i" /*}*/, &mode )) == LBER_ERROR ) {
2183                 rs->sr_text = "Sync control : mode decoding error";
2184                 return LDAP_PROTOCOL_ERROR;
2185         }
2186
2187         switch( mode ) {
2188         case LDAP_SYNC_REFRESH_ONLY:
2189                 mode = SLAP_SYNC_REFRESH;
2190                 break;
2191         case LDAP_SYNC_REFRESH_AND_PERSIST:
2192                 mode = SLAP_SYNC_REFRESH_AND_PERSIST;
2193                 break;
2194         default:
2195                 rs->sr_text = "Sync control : unknown update mode";
2196                 return LDAP_PROTOCOL_ERROR;
2197         }
2198
2199         tag = ber_peek_tag( ber, &len );
2200
2201         if ( tag == LDAP_TAG_SYNC_COOKIE ) {
2202                 if (( ber_scanf( ber, /*{*/ "o", &cookie )) == LBER_ERROR ) {
2203                         rs->sr_text = "Sync control : cookie decoding error";
2204                         return LDAP_PROTOCOL_ERROR;
2205                 }
2206         }
2207         if ( tag == LDAP_TAG_RELOAD_HINT ) {
2208                 if (( ber_scanf( ber, /*{*/ "b", &rhint )) == LBER_ERROR ) {
2209                         rs->sr_text = "Sync control : rhint decoding error";
2210                         return LDAP_PROTOCOL_ERROR;
2211                 }
2212         }
2213         if (( ber_scanf( ber, /*{*/ "}")) == LBER_ERROR ) {
2214                         rs->sr_text = "Sync control : decoding error";
2215                         return LDAP_PROTOCOL_ERROR;
2216         }
2217         sr = op->o_tmpcalloc( 1, sizeof(struct sync_control), op->o_tmpmemctx );
2218         sr->sr_rhint = rhint;
2219         if (!BER_BVISNULL(&cookie)) {
2220                 ber_dupbv( &sr->sr_state.octet_str, &cookie );
2221                 slap_parse_sync_cookie( &sr->sr_state );
2222         }
2223
2224         op->o_controls[slap_cids.sc_LDAPsync] = sr;
2225
2226         (void) ber_free( ber, 1 );
2227
2228         op->o_sync = ctrl->ldctl_iscritical
2229                 ? SLAP_CONTROL_CRITICAL
2230                 : SLAP_CONTROL_NONCRITICAL;
2231
2232         op->o_sync_mode |= mode;        /* o_sync_mode shares o_sync */
2233
2234         return LDAP_SUCCESS;
2235 }
2236
2237 /* This overlay is set up for dynamic loading via moduleload. For static
2238  * configuration, you'll need to arrange for the slap_overinst to be
2239  * initialized and registered by some other function inside slapd.
2240  */
2241
2242 static slap_overinst            syncprov;
2243
2244 int
2245 syncprov_init()
2246 {
2247         int rc;
2248
2249         rc = register_supported_control( LDAP_CONTROL_SYNC,
2250                 SLAP_CTRL_HIDE|SLAP_CTRL_SEARCH, NULL,
2251                 syncprov_parseCtrl, &slap_cids.sc_LDAPsync );
2252         if ( rc != LDAP_SUCCESS ) {
2253                 fprintf( stderr, "Failed to register control %d\n", rc );
2254                 return rc;
2255         }
2256
2257         syncprov.on_bi.bi_type = "syncprov";
2258         syncprov.on_bi.bi_db_init = syncprov_db_init;
2259         syncprov.on_bi.bi_db_config = syncprov_db_config;
2260         syncprov.on_bi.bi_db_destroy = syncprov_db_destroy;
2261         syncprov.on_bi.bi_db_open = syncprov_db_open;
2262         syncprov.on_bi.bi_db_close = syncprov_db_close;
2263
2264         syncprov.on_bi.bi_op_abandon = syncprov_op_abandon;
2265         syncprov.on_bi.bi_op_cancel = syncprov_op_abandon;
2266
2267         syncprov.on_bi.bi_op_add = syncprov_op_mod;
2268         syncprov.on_bi.bi_op_compare = syncprov_op_compare;
2269         syncprov.on_bi.bi_op_delete = syncprov_op_mod;
2270         syncprov.on_bi.bi_op_modify = syncprov_op_mod;
2271         syncprov.on_bi.bi_op_modrdn = syncprov_op_mod;
2272         syncprov.on_bi.bi_op_search = syncprov_op_search;
2273         syncprov.on_bi.bi_extended = syncprov_op_extended;
2274         syncprov.on_bi.bi_operational = syncprov_operational;
2275
2276         return overlay_register( &syncprov );
2277 }
2278
2279 #if SLAPD_OVER_SYNCPROV == SLAPD_MOD_DYNAMIC
2280 int
2281 init_module( int argc, char *argv[] )
2282 {
2283         return syncprov_init();
2284 }
2285 #endif /* SLAPD_OVER_SYNCPROV == SLAPD_MOD_DYNAMIC */
2286
2287 #endif /* defined(SLAPD_OVER_SYNCPROV) */