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;
 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
 861 static int
 862 syncprov_op_abandon( Operation *op, SlapReply *rs )
 863 {
 864         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
 865         syncprov_info_t         *si = on->on_bi.bi_private;
 866         syncops *so, *soprev;
 867
 868         ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
 869         for ( so=si->si_ops, soprev = (syncops *)&si->si_ops; so;
 870                 soprev=so, so=so->s_next ) {
 871                 if ( so->s_op->o_connid == op->o_connid &&
 872                         so->s_op->o_msgid == op->orn_msgid ) {
 873                                 so->s_op->o_abandon = 1;
 874                                 soprev->s_next = so->s_next;
 875                                 break;
 876                 }
 877         }
 878         ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
 879         if ( so ) {
 880                 /* Is this really a Cancel exop? */
 881                 if ( op->o_tag != LDAP_REQ_ABANDON ) {
 882                         rs->sr_err = LDAP_CANCELLED;
 883                         send_ldap_result( so->s_op, rs );
 884                 }
 885                 syncprov_drop_psearch( so, 0 );
 886         }
 887         return SLAP_CB_CONTINUE;
 888 }
 889
 890 /* Find which persistent searches are affected by this operation */
 891 static void
 892 syncprov_matchops( Operation *op, opcookie *opc, int saveit )
 893 {
 894         slap_overinst *on = opc->son;
 895         syncprov_info_t         *si = on->on_bi.bi_private;
 896
 897         fbase_cookie fc;
 898         syncops *ss, *sprev, *snext;
 899         Entry *e;
 900         Attribute *a;
 901         int rc;
 902         struct berval newdn;
 903         int freefdn = 0;
 904
 905         fc.fdn = &op->o_req_ndn;
 906         /* compute new DN */
 907         if ( op->o_tag == LDAP_REQ_MODRDN && !saveit ) {
 908                 struct berval pdn;
 909                 if ( op->orr_nnewSup ) pdn = *op->orr_nnewSup;
 910                 else dnParent( fc.fdn, &pdn );
 911                 build_new_dn( &newdn, &pdn, &op->orr_nnewrdn, op->o_tmpmemctx );
 912                 fc.fdn = &newdn;
 913                 freefdn = 1;
 914         }
 915         if ( op->o_tag != LDAP_REQ_ADD ) {
 916                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
 917                 rc = be_entry_get_rw( op, fc.fdn, NULL, NULL, 0, &e );
 918                 op->o_bd->bd_info = (BackendInfo *)on;
 919                 if ( rc ) return;
 920         } else {
 921                 e = op->ora_e;
 922         }
 923
 924         /* Never replicate these */
 925         if ( is_entry_syncConsumerSubentry( e )) {
 926                 goto done;
 927         }
 928         if ( saveit ) {
 929                 ber_dupbv_x( &opc->sdn, &e->e_name, op->o_tmpmemctx );
 930                 ber_dupbv_x( &opc->sndn, &e->e_nname, op->o_tmpmemctx );
 931                 opc->sreference = is_entry_referral( e );
 932         }
 933         if ( saveit || op->o_tag == LDAP_REQ_ADD ) {
 934                 a = attr_find( e->e_attrs, slap_schema.si_ad_entryUUID );
 935                 if ( a )
 936                         ber_dupbv_x( &opc->suuid, &a->a_nvals[0], op->o_tmpmemctx );
 937         }
 938
 939         ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
 940         for (ss = si->si_ops, sprev = (syncops *)&si->si_ops; ss;
 941                 sprev = ss, ss=snext)
 942         {
 943                 syncmatches *sm;
 944                 int found = 0;
 945
 946                 snext = ss->s_next;
 947                 /* validate base */
 948                 fc.fss = ss;
 949                 fc.fbase = 0;
 950                 fc.fscope = 0;
 951
 952                 /* If the base of the search is missing, signal a refresh */
 953                 rc = syncprov_findbase( op, &fc );
 954                 if ( rc != LDAP_SUCCESS ) {
 955                         SlapReply rs = {REP_RESULT};
 956                         send_ldap_error( ss->s_op, &rs, LDAP_SYNC_REFRESH_REQUIRED,
 957                                 "search base has changed" );
 958                         sprev->s_next = snext;
 959                         syncprov_drop_psearch( ss, 1 );
 960                         continue;
 961                 }
 962
 963                 /* If we're sending results now, look for this op in old matches */
 964                 if ( !saveit ) {
 965                         syncmatches *old;
 966                         for ( sm=opc->smatches, old=(syncmatches *)&opc->smatches; sm;
 967                                 old=sm, sm=sm->sm_next ) {
 968                                 if ( sm->sm_op == ss ) {
 969                                         found = 1;
 970                                         old->sm_next = sm->sm_next;
 971                                         op->o_tmpfree( sm, op->o_tmpmemctx );
 972                                         break;
 973                                 }
 974                         }
 975                 }
 976
 977                 /* check if current o_req_dn is in scope and matches filter */
 978                 if ( fc.fscope && test_filter( op, e, ss->s_op->ors_filter ) ==
 979                         LDAP_COMPARE_TRUE ) {
 980                         if ( saveit ) {
 981                                 sm = op->o_tmpalloc( sizeof(syncmatches), op->o_tmpmemctx );
 982                                 sm->sm_next = opc->smatches;
 983                                 sm->sm_op = ss;
 984                                 ss->s_inuse++;
 985                                 opc->smatches = sm;
 986                         } else {
 987                                 /* if found send UPDATE else send ADD */
 988                                 syncprov_sendresp( op, opc, ss, e,
 989                                         found ? LDAP_SYNC_MODIFY : LDAP_SYNC_ADD, 1 );
 990                         }
 991                 } else if ( !saveit && found ) {
 992                         /* send DELETE */
 993                         syncprov_sendresp( op, opc, ss, NULL, LDAP_SYNC_DELETE, 1 );
 994                 }
 995         }
 996         ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
 997 done:
 998         if ( op->o_tag != LDAP_REQ_ADD ) {
 999                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
1000                 be_entry_release_rw( op, e, 0 );
1001                 op->o_bd->bd_info = (BackendInfo *)on;
1002         }
1003         if ( freefdn ) {
1004                 op->o_tmpfree( fc.fdn->bv_val, op->o_tmpmemctx );
1005         }
1006 }
1007
1008 static int
1009 syncprov_op_cleanup( Operation *op, SlapReply *rs )
1010 {
1011         slap_callback *cb = op->o_callback;
1012         opcookie *opc = cb->sc_private;
1013         slap_overinst *on = opc->son;
1014         syncprov_info_t         *si = on->on_bi.bi_private;
1015         syncmatches *sm, *snext;
1016         modtarget *mt, mtdummy;
1017
1018         for (sm = opc->smatches; sm; sm=snext) {
1019                 snext = sm->sm_next;
1020                 syncprov_free_syncop( sm->sm_op );
1021                 op->o_tmpfree( sm, op->o_tmpmemctx );
1022         }
1023
1024         /* Remove op from lock table */
1025         mtdummy.mt_op = op;
1026         ldap_pvt_thread_mutex_lock( &si->si_mods_mutex );
1027         mt = avl_find( si->si_mods, &mtdummy, sp_avl_cmp );
1028         ldap_pvt_thread_mutex_unlock( &si->si_mods_mutex );
1029         if ( mt ) {
1030                 modinst *mi = mt->mt_mods;
1031
1032                 /* If there are more, promote the next one */
1033                 ldap_pvt_thread_mutex_lock( &mt->mt_mutex );
1034                 if ( mi->mi_next ) {
1035                         mt->mt_mods = mi->mi_next;
1036                         mt->mt_op = mt->mt_mods->mi_op;
1037                         ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
1038                 } else {
1039                         ldap_pvt_thread_mutex_lock( &si->si_mods_mutex );
1040                         avl_delete( &si->si_mods, mt, sp_avl_cmp );
1041                         ldap_pvt_thread_mutex_unlock( &si->si_mods_mutex );
1042                         ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
1043                         ldap_pvt_thread_mutex_destroy( &mt->mt_mutex );
1044                         ch_free( mt );
1045                 }
1046         }
1047         if ( !BER_BVISNULL( &opc->suuid ))
1048                 op->o_tmpfree( opc->suuid.bv_val, op->o_tmpmemctx );
1049         if ( !BER_BVISNULL( &opc->sndn ))
1050                 op->o_tmpfree( opc->sndn.bv_val, op->o_tmpmemctx );
1051         if ( !BER_BVISNULL( &opc->sdn ))
1052                 op->o_tmpfree( opc->sdn.bv_val, op->o_tmpmemctx );
1053         op->o_callback = cb->sc_next;
1054         op->o_tmpfree(cb, op->o_tmpmemctx);
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         for ( sl = si->si_logs; sl; ) {
1097                 /* Allocate a record. UUIDs are not NUL-terminated. */
1098                 se = ch_malloc( sizeof( slog_entry ) + opc->suuid.bv_len +
1099                         csn->bv_len + 1 );
1100                 se->se_next = NULL;
1101                 se->se_tag = op->o_tag;
1102
1103                 se->se_uuid.bv_val = (char *)(se+1);
1104                 se->se_csn.bv_val = se->se_uuid.bv_val + opc->suuid.bv_len + 1;
1105                 AC_MEMCPY( se->se_uuid.bv_val, opc->suuid.bv_val, opc->suuid.bv_len );
1106                 se->se_uuid.bv_len = opc->suuid.bv_len;
1107
1108                 AC_MEMCPY( se->se_csn.bv_val, csn->bv_val, csn->bv_len );
1109                 se->se_csn.bv_val[csn->bv_len] = '\0';
1110                 se->se_csn.bv_len = csn->bv_len;
1111
1112                 ldap_pvt_thread_mutex_lock( &sl->sl_mutex );
1113                 if ( sl->sl_head ) {
1114                         sl->sl_tail->se_next = se;
1115                 } else {
1116                         sl->sl_head = se;
1117                 }
1118                 sl->sl_tail = se;
1119                 sl->sl_num++;
1120                 while ( sl->sl_num > sl->sl_size ) {
1121                         se = sl->sl_head;
1122                         sl->sl_head = se->se_next;
1123                         strcpy( sl->sl_mincsn.bv_val, se->se_csn.bv_val );
1124                         sl->sl_mincsn.bv_len = se->se_csn.bv_len;
1125                         ch_free( se );
1126                         sl->sl_num--;
1127                         if ( !sl->sl_head ) {
1128                                 sl->sl_tail = NULL;
1129                         }
1130                 }
1131                 ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
1132         }
1133 }
1134
1135 /* Just set a flag if we found the matching entry */
1136 static int
1137 playlog_cb( Operation *op, SlapReply *rs )
1138 {
1139         if ( rs->sr_type == REP_SEARCH ) {
1140                 op->o_callback->sc_private = (void *)1;
1141         }
1142         return rs->sr_err;
1143 }
1144
1145 /* enter with sl->sl_mutex locked, release before returning */
1146 static void
1147 syncprov_playlog( Operation *op, SlapReply *rs, sessionlog *sl,
1148         struct berval *oldcsn, struct berval *ctxcsn )
1149 {
1150         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
1151         syncprov_info_t         *si = on->on_bi.bi_private;
1152         slog_entry *se;
1153         int i, j, ndel, num, nmods, mmods;
1154         BerVarray uuids;
1155
1156         if ( !sl->sl_num ) {
1157                 ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
1158                 return;
1159         }
1160
1161         num = sl->sl_num;
1162         i = 0;
1163         nmods = 0;
1164
1165         uuids = op->o_tmpalloc( (num+1) * sizeof( struct berval ) +
1166                 num * UUID_LEN, op->o_tmpmemctx );
1167
1168         uuids[0].bv_val = (char *)(uuids + num + 1);
1169
1170         /* Make a copy of the relevant UUIDs. Put the Deletes up front
1171          * and everything else at the end. Do this first so we can
1172          * unlock the list mutex.
1173          */
1174         for ( se=sl->sl_head; se; se=se->se_next ) {
1175                 if ( ber_bvcmp( &se->se_csn, oldcsn ) < 0 ) continue;
1176                 if ( ber_bvcmp( &se->se_csn, ctxcsn ) > 0 ) break;
1177                 if ( se->se_tag == LDAP_REQ_DELETE ) {
1178                         j = i;
1179                         i++;
1180                 } else {
1181                         nmods++;
1182                         j = num - nmods;
1183                 }
1184                 uuids[j].bv_val = uuids[0].bv_val + (j * UUID_LEN);
1185                 AC_MEMCPY(uuids[j].bv_val, se->se_uuid.bv_val, UUID_LEN);
1186                 uuids[j].bv_len = UUID_LEN;
1187         }
1188         ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
1189
1190         ndel = i;
1191
1192         /* Zero out unused slots */
1193         for ( i=ndel; i < num - nmods; i++ )
1194                 uuids[i].bv_len = 0;
1195
1196         /* Mods must be validated to see if they belong in this delete set.
1197          */
1198
1199         mmods = nmods;
1200         /* Strip any duplicates */
1201         for ( i=0; i<nmods; i++ ) {
1202                 for ( j=0; j<ndel; j++ ) {
1203                         if ( bvmatch( &uuids[j], &uuids[num - 1 - i] )) {
1204                                 uuids[num - 1 - i].bv_len = 0;
1205                                 mmods --;
1206                                 break;
1207                         }
1208                 }
1209                 if ( uuids[num - 1 - i].bv_len == 0 ) continue;
1210                 for ( j=0; j<i; j++ ) {
1211                         if ( bvmatch( &uuids[num - 1 - j], &uuids[num - 1 - i] )) {
1212                                 uuids[num - 1 - i].bv_len = 0;
1213                                 mmods --;
1214                                 break;
1215                         }
1216                 }
1217         }
1218
1219         if ( mmods ) {
1220                 Operation fop;
1221                 SlapReply frs = { REP_RESULT };
1222                 int rc;
1223                 Filter mf, af;
1224                 AttributeAssertion eq;
1225                 slap_callback cb = {0};
1226
1227                 fop = *op;
1228
1229                 fop.o_sync_mode = 0;
1230                 fop.o_callback = &cb;
1231                 fop.ors_limit = NULL;
1232                 fop.ors_tlimit = SLAP_NO_LIMIT;
1233                 fop.ors_attrs = slap_anlist_all_attributes;
1234                 fop.ors_attrsonly = 0;
1235                 fop.o_managedsait = SLAP_CONTROL_CRITICAL;
1236
1237                 af.f_choice = LDAP_FILTER_AND;
1238                 af.f_next = NULL;
1239                 af.f_and = &mf;
1240                 mf.f_choice = LDAP_FILTER_EQUALITY;
1241                 mf.f_ava = &eq;
1242                 mf.f_av_desc = slap_schema.si_ad_entryUUID;
1243                 mf.f_next = fop.ors_filter;
1244
1245                 fop.ors_filter = &af;
1246
1247                 cb.sc_response = playlog_cb;
1248                 fop.o_bd->bd_info = on->on_info->oi_orig;
1249
1250                 for ( i=ndel; i<num; i++ ) {
1251                         if ( uuids[i].bv_len == 0 ) continue;
1252
1253                         mf.f_av_value = uuids[i];
1254                         cb.sc_private = NULL;
1255                         fop.ors_slimit = 1;
1256                         rc = fop.o_bd->be_search( &fop, &frs );
1257
1258                         /* If entry was not found, add to delete list */
1259                         if ( !cb.sc_private ) {
1260                                 uuids[ndel++] = uuids[i];
1261                         }
1262                 }
1263                 fop.o_bd->bd_info = (BackendInfo *)on;
1264         }
1265         if ( ndel ) {
1266                 uuids[ndel].bv_val = NULL;
1267                 syncprov_sendinfo( op, rs, LDAP_TAG_SYNC_ID_SET, NULL, 0, uuids, 1 );
1268         }
1269 }
1270
1271 static int
1272 syncprov_op_response( Operation *op, SlapReply *rs )
1273 {
1274         opcookie *opc = op->o_callback->sc_private;
1275         slap_overinst *on = opc->son;
1276         syncprov_info_t         *si = on->on_bi.bi_private;
1277         syncmatches *sm;
1278
1279         if ( rs->sr_err == LDAP_SUCCESS )
1280         {
1281                 struct berval maxcsn = BER_BVNULL, curcsn = BER_BVNULL;
1282                 char cbuf[LDAP_LUTIL_CSNSTR_BUFSIZE];
1283
1284                 /* Update our context CSN */
1285                 cbuf[0] = '\0';
1286                 ldap_pvt_thread_mutex_lock( &si->si_csn_mutex );
1287                 slap_get_commit_csn( op, &maxcsn, &curcsn );
1288                 if ( !BER_BVISNULL( &maxcsn ) ) {
1289                         strcpy( cbuf, maxcsn.bv_val );
1290                         if ( ber_bvcmp( &maxcsn, &si->si_ctxcsn ) > 0 ) {
1291                                 strcpy( si->si_ctxcsnbuf, cbuf );
1292                                 si->si_ctxcsn.bv_len = maxcsn.bv_len;
1293                         }
1294                 }
1295
1296                 si->si_numops++;
1297                 if ( si->si_chkops || si->si_chktime ) {
1298                         int do_check=0;
1299                         if ( si->si_chkops && si->si_numops >= si->si_chkops ) {
1300                                 do_check = 1;
1301                                 si->si_numops = 0;
1302                         }
1303                         if ( si->si_chktime &&
1304                                 (op->o_time - si->si_chklast >= si->si_chktime )) {
1305                                 do_check = 1;
1306                                 si->si_chklast = op->o_time;
1307                         }
1308                         if ( do_check ) {
1309                                 syncprov_checkpoint( op, rs, on );
1310                         }
1311                 }
1312                 ldap_pvt_thread_mutex_unlock( &si->si_csn_mutex );
1313
1314                 opc->sctxcsn.bv_len = maxcsn.bv_len;
1315                 opc->sctxcsn.bv_val = cbuf;
1316
1317                 /* Handle any persistent searches */
1318                 if ( si->si_ops ) {
1319                         switch(op->o_tag) {
1320                         case LDAP_REQ_ADD:
1321                         case LDAP_REQ_MODIFY:
1322                         case LDAP_REQ_MODRDN:
1323                         case LDAP_REQ_EXTENDED:
1324                                 syncprov_matchops( op, opc, 0 );
1325                                 break;
1326                         case LDAP_REQ_DELETE:
1327                                 /* for each match in opc->smatches:
1328                                  *   send DELETE msg
1329                                  */
1330                                 ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
1331                                 for ( sm = opc->smatches; sm; sm=sm->sm_next ) {
1332                                         if ( sm->sm_op->s_op->o_abandon )
1333                                                 continue;
1334                                         syncprov_sendresp( op, opc, sm->sm_op, NULL,
1335                                                 LDAP_SYNC_DELETE, 1 );
1336                                 }
1337                                 ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
1338                                 break;
1339                         }
1340                 }
1341
1342                 /* Add any log records */
1343                 if ( si->si_logs && op->o_tag != LDAP_REQ_ADD ) {
1344                         syncprov_add_slog( op, &curcsn );
1345                 }
1346
1347         }
1348         return SLAP_CB_CONTINUE;
1349 }
1350
1351 /* We don't use a subentry to store the context CSN any more.
1352  * We expose the current context CSN as an operational attribute
1353  * of the suffix entry.
1354  */
1355 static int
1356 syncprov_op_compare( Operation *op, SlapReply *rs )
1357 {
1358         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
1359         syncprov_info_t         *si = on->on_bi.bi_private;
1360         int rc = SLAP_CB_CONTINUE;
1361
1362         if ( dn_match( &op->o_req_ndn, op->o_bd->be_nsuffix ) &&
1363                 op->oq_compare.rs_ava->aa_desc == slap_schema.si_ad_contextCSN )
1364         {
1365                 Entry e = {0};
1366                 Attribute a = {0};
1367                 struct berval bv[2];
1368
1369                 e.e_name = op->o_bd->be_suffix[0];
1370                 e.e_nname = op->o_bd->be_nsuffix[0];
1371
1372                 BER_BVZERO( &bv[1] );
1373                 bv[0] = si->si_ctxcsn;
1374
1375                 a.a_desc = slap_schema.si_ad_contextCSN;
1376                 a.a_vals = bv;
1377                 a.a_nvals = a.a_vals;
1378
1379                 ldap_pvt_thread_mutex_lock( &si->si_csn_mutex );
1380
1381                 rs->sr_err = access_allowed( op, &e, op->oq_compare.rs_ava->aa_desc,
1382                         &op->oq_compare.rs_ava->aa_value, ACL_COMPARE, NULL );
1383                 if ( ! rs->sr_err ) {
1384                         rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
1385                         goto return_results;
1386                 }
1387
1388                 if ( get_assert( op ) &&
1389                         ( test_filter( op, &e, get_assertion( op ) ) != LDAP_COMPARE_TRUE ) )
1390                 {
1391                         rs->sr_err = LDAP_ASSERTION_FAILED;
1392                         goto return_results;
1393                 }
1394
1395
1396                 rs->sr_err = LDAP_COMPARE_FALSE;
1397
1398                 if ( value_find_ex( op->oq_compare.rs_ava->aa_desc,
1399                         SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
1400                                 SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
1401                                 a.a_nvals, &op->oq_compare.rs_ava->aa_value, op->o_tmpmemctx ) == 0 )
1402                 {
1403                         rs->sr_err = LDAP_COMPARE_TRUE;
1404                 }
1405
1406 return_results:;
1407
1408                 ldap_pvt_thread_mutex_unlock( &si->si_csn_mutex );
1409
1410                 send_ldap_result( op, rs );
1411
1412                 if( rs->sr_err == LDAP_COMPARE_FALSE || rs->sr_err == LDAP_COMPARE_TRUE ) {
1413                         rs->sr_err = LDAP_SUCCESS;
1414                 }
1415                 rc = rs->sr_err;
1416         }
1417
1418         return rc;
1419 }
1420
1421 static int
1422 syncprov_op_mod( Operation *op, SlapReply *rs )
1423 {
1424         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
1425         syncprov_info_t         *si = on->on_bi.bi_private;
1426
1427         slap_callback *cb = op->o_tmpcalloc(1, sizeof(slap_callback)+
1428                 sizeof(opcookie) +
1429                 (si->si_ops ? sizeof(modinst) : 0 ),
1430                 op->o_tmpmemctx);
1431         opcookie *opc = (opcookie *)(cb+1);
1432         opc->son = on;
1433         cb->sc_response = syncprov_op_response;
1434         cb->sc_cleanup = syncprov_op_cleanup;
1435         cb->sc_private = opc;
1436         cb->sc_next = op->o_callback;
1437         op->o_callback = cb;
1438
1439         /* If there are active persistent searches, lock this operation.
1440          * See seqmod.c for the locking logic on its own.
1441          */
1442         if ( si->si_ops ) {
1443                 modtarget *mt, mtdummy;
1444                 modinst *mi;
1445
1446                 mi = (modinst *)(opc+1);
1447                 mi->mi_op = op;
1448
1449                 /* See if we're already modifying this entry... */
1450                 mtdummy.mt_op = op;
1451                 ldap_pvt_thread_mutex_lock( &si->si_mods_mutex );
1452                 mt = avl_find( si->si_mods, &mtdummy, sp_avl_cmp );
1453                 if ( mt ) {
1454                         ldap_pvt_thread_mutex_lock( &mt->mt_mutex );
1455                         ldap_pvt_thread_mutex_unlock( &si->si_mods_mutex );
1456                         mt->mt_tail->mi_next = mi;
1457                         mt->mt_tail = mi;
1458                         /* wait for this op to get to head of list */
1459                         while ( mt->mt_mods != mi ) {
1460                                 ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
1461                                 ldap_pvt_thread_yield();
1462                                 ldap_pvt_thread_mutex_lock( &mt->mt_mutex );
1463                         }
1464                         ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
1465                 } else {
1466                         /* Record that we're modifying this entry now */
1467                         mt = ch_malloc( sizeof(modtarget) );
1468                         mt->mt_mods = mi;
1469                         mt->mt_tail = mi;
1470                         mt->mt_op = mi->mi_op;
1471                         ldap_pvt_thread_mutex_init( &mt->mt_mutex );
1472                         avl_insert( &si->si_mods, mt, sp_avl_cmp, avl_dup_error );
1473                         ldap_pvt_thread_mutex_unlock( &si->si_mods_mutex );
1474                 }
1475         }
1476
1477         if (( si->si_ops || si->si_logs ) && op->o_tag != LDAP_REQ_ADD )
1478                 syncprov_matchops( op, opc, 1 );
1479
1480
1481         return SLAP_CB_CONTINUE;
1482 }
1483
1484 static int
1485 syncprov_op_extended( Operation *op, SlapReply *rs )
1486 {
1487         if ( exop_is_write( op ))
1488                 return syncprov_op_mod( op, rs );
1489
1490         return SLAP_CB_CONTINUE;
1491 }
1492
1493 typedef struct searchstate {
1494         slap_overinst *ss_on;
1495         syncops *ss_so;
1496         int ss_present;
1497 } searchstate;
1498
1499 static int
1500 syncprov_search_cleanup( Operation *op, SlapReply *rs )
1501 {
1502         if ( rs->sr_ctrls ) {
1503                 op->o_tmpfree( rs->sr_ctrls[0], op->o_tmpmemctx );
1504                 op->o_tmpfree( rs->sr_ctrls, op->o_tmpmemctx );
1505                 rs->sr_ctrls = NULL;
1506         }
1507         return 0;
1508 }
1509
1510 static void
1511 syncprov_detach_op( Operation *op, syncops *so )
1512 {
1513         Operation *op2;
1514         int i, alen = 0;
1515         size_t size;
1516         char *ptr;
1517         GroupAssertion *g1, *g2;
1518
1519         /* count the search attrs */
1520         for (i=0; op->ors_attrs && !BER_BVISNULL( &op->ors_attrs[i].an_name ); i++) {
1521                 alen += op->ors_attrs[i].an_name.bv_len + 1;
1522         }
1523         /* Make a new copy of the operation */
1524         size = sizeof(Operation) + sizeof(Opheader) +
1525                 (i ? ( (i+1) * sizeof(AttributeName) + alen) : 0) +
1526                 op->o_req_dn.bv_len + 1 +
1527                 op->o_req_ndn.bv_len + 1 +
1528                 op->o_ndn.bv_len + 1 +
1529                 so->s_filterstr.bv_len + 1;
1530         op2 = (Operation *)ch_calloc( 1, size );
1531         op2->o_hdr = (Opheader *)(op2+1);
1532
1533         /* Copy the fields we care about explicitly, leave the rest alone */
1534         *op2->o_hdr = *op->o_hdr;
1535         op2->o_tag = op->o_tag;
1536         op2->o_time = op->o_time;
1537         op2->o_bd = op->o_bd;
1538         op2->o_request = op->o_request;
1539
1540         if ( i ) {
1541                 op2->ors_attrs = (AttributeName *)(op2->o_hdr + 1);
1542                 ptr = (char *)(op2->ors_attrs+i+1);
1543                 for (i=0; !BER_BVISNULL( &op->ors_attrs[i].an_name ); i++) {
1544                         op2->ors_attrs[i] = op->ors_attrs[i];
1545                         op2->ors_attrs[i].an_name.bv_val = ptr;
1546                         ptr = lutil_strcopy( ptr, op->ors_attrs[i].an_name.bv_val ) + 1;
1547                 }
1548                 BER_BVZERO( &op2->ors_attrs[i].an_name );
1549         } else {
1550                 ptr = (char *)(op2->o_hdr + 1);
1551         }
1552         op2->o_authz = op->o_authz;
1553         op2->o_ndn.bv_val = ptr;
1554         ptr = lutil_strcopy(ptr, op->o_ndn.bv_val) + 1;
1555         op2->o_dn = op2->o_ndn;
1556         op2->o_req_dn.bv_len = op->o_req_dn.bv_len;
1557         op2->o_req_dn.bv_val = ptr;
1558         ptr = lutil_strcopy(ptr, op->o_req_dn.bv_val) + 1;
1559         op2->o_req_ndn.bv_len = op->o_req_ndn.bv_len;
1560         op2->o_req_ndn.bv_val = ptr;
1561         ptr = lutil_strcopy(ptr, op->o_req_ndn.bv_val) + 1;
1562         op2->ors_filterstr.bv_val = ptr;
1563         strcpy( ptr, so->s_filterstr.bv_val );
1564         op2->ors_filterstr.bv_len = so->s_filterstr.bv_len;
1565         op2->ors_filter = str2filter( ptr );
1566         so->s_op = op2;
1567
1568         /* Copy any cached group ACLs individually */
1569         op2->o_groups = NULL;
1570         for ( g1=op->o_groups; g1; g1=g1->ga_next ) {
1571                 g2 = ch_malloc( sizeof(GroupAssertion) + g1->ga_len );
1572                 *g2 = *g1;
1573                 strcpy( g2->ga_ndn, g1->ga_ndn );
1574                 g2->ga_next = op2->o_groups;
1575                 op2->o_groups = g2;
1576         }
1577
1578         /* Add op2 to conn so abandon will find us */
1579         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1580         op->o_conn->c_n_ops_executing++;
1581         op->o_conn->c_n_ops_completed--;
1582         LDAP_STAILQ_INSERT_TAIL( &op->o_conn->c_ops, op2, o_next );
1583         so->s_flags |= PS_IS_DETACHED;
1584         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1585 }
1586
1587 static int
1588 syncprov_search_response( Operation *op, SlapReply *rs )
1589 {
1590         searchstate *ss = op->o_callback->sc_private;
1591         slap_overinst *on = ss->ss_on;
1592         syncprov_info_t         *si = on->on_bi.bi_private;
1593         sync_control *srs = op->o_controls[slap_cids.sc_LDAPsync];
1594
1595         if ( rs->sr_type == REP_SEARCH || rs->sr_type == REP_SEARCHREF ) {
1596                 int i;
1597                 /* If we got a referral without a referral object, there's
1598                  * something missing that we cannot replicate. Just ignore it.
1599                  * The consumer will abort because we didn't send the expected
1600                  * control.
1601                  */
1602                 if ( !rs->sr_entry ) {
1603                         assert( rs->sr_entry );
1604                         Debug( LDAP_DEBUG_ANY, "bogus referral in context\n",0,0,0 );
1605                         return SLAP_CB_CONTINUE;
1606                 }
1607                 if ( srs->sr_state.ctxcsn ) {
1608                         Attribute *a = attr_find( rs->sr_entry->e_attrs,
1609                                 slap_schema.si_ad_entryCSN );
1610
1611                         /* Don't send the ctx entry twice */
1612                         if ( a && bvmatch( &a->a_nvals[0], srs->sr_state.ctxcsn ) )
1613                                 return LDAP_SUCCESS;
1614                 }
1615                 rs->sr_ctrls = op->o_tmpalloc( sizeof(LDAPControl *)*2,
1616                         op->o_tmpmemctx );
1617                 rs->sr_ctrls[1] = NULL;
1618                 rs->sr_err = syncprov_state_ctrl( op, rs, rs->sr_entry,
1619                         LDAP_SYNC_ADD, rs->sr_ctrls, 0, 0, NULL );
1620         } else if ( rs->sr_type == REP_RESULT && rs->sr_err == LDAP_SUCCESS ) {
1621                 struct berval cookie;
1622
1623                 slap_compose_sync_cookie( op, &cookie,
1624                         &op->ors_filter->f_and->f_ava->aa_value,
1625                         srs->sr_state.rid );
1626
1627                 /* Is this a regular refresh? */
1628                 if ( !ss->ss_so ) {
1629                         rs->sr_ctrls = op->o_tmpalloc( sizeof(LDAPControl *)*2,
1630                                 op->o_tmpmemctx );
1631                         rs->sr_ctrls[1] = NULL;
1632                         rs->sr_err = syncprov_done_ctrl( op, rs, rs->sr_ctrls,
1633                                 0, 1, &cookie, ss->ss_present ?  LDAP_SYNC_REFRESH_PRESENTS :
1634                                         LDAP_SYNC_REFRESH_DELETES );
1635                 } else {
1636                         int locked = 0;
1637                 /* It's RefreshAndPersist, transition to Persist phase */
1638                         syncprov_sendinfo( op, rs, ( ss->ss_present && rs->sr_nentries ) ?
1639                                 LDAP_TAG_SYNC_REFRESH_PRESENT : LDAP_TAG_SYNC_REFRESH_DELETE,
1640                                 &cookie, 1, NULL, 0 );
1641                         /* Flush any queued persist messages */
1642                         if ( ss->ss_so->s_res ) {
1643                                 syncres *sr, *srnext;
1644                                 Entry *e;
1645                                 opcookie opc;
1646
1647                                 opc.son = on;
1648                                 ldap_pvt_thread_mutex_lock( &ss->ss_so->s_mutex );
1649                                 locked = 1;
1650                                 for (sr = ss->ss_so->s_res; sr; sr=srnext) {
1651                                         int rc = LDAP_SUCCESS;
1652                                         srnext = sr->s_next;
1653                                         opc.sdn = sr->s_dn;
1654                                         opc.sndn = sr->s_ndn;
1655                                         opc.suuid = sr->s_uuid;
1656                                         opc.sctxcsn = sr->s_csn;
1657                                         opc.sreference = sr->s_isreference;
1658                                         e = NULL;
1659
1660                                         if ( sr->s_mode != LDAP_SYNC_DELETE ) {
1661                                                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
1662                                                 rc = be_entry_get_rw( op, &opc.sndn, NULL, NULL, 0, &e );
1663                                                 op->o_bd->bd_info = (BackendInfo *)on;
1664                                         }
1665                                         if ( rc == LDAP_SUCCESS )
1666                                                 syncprov_sendresp( op, &opc, ss->ss_so, e,
1667                                                         sr->s_mode, 0 );
1668
1669                                         if ( e ) {
1670                                                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
1671                                                 be_entry_release_rw( op, e, 0 );
1672                                                 op->o_bd->bd_info = (BackendInfo *)on;
1673                                         }
1674                                         ch_free( sr );
1675                                 }
1676                                 ss->ss_so->s_res = NULL;
1677                                 ss->ss_so->s_restail = NULL;
1678                         }
1679
1680                         /* Turn off the refreshing flag */
1681                         ss->ss_so->s_flags ^= PS_IS_REFRESHING;
1682                         if ( locked )
1683                                 ldap_pvt_thread_mutex_unlock( &ss->ss_so->s_mutex );
1684
1685                         /* Detach this Op from frontend control */
1686                         syncprov_detach_op( op, ss->ss_so );
1687
1688                         return LDAP_SUCCESS;
1689                 }
1690         }
1691
1692         return SLAP_CB_CONTINUE;
1693 }
1694
1695 static int
1696 syncprov_op_search( Operation *op, SlapReply *rs )
1697 {
1698         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
1699         syncprov_info_t         *si = (syncprov_info_t *)on->on_bi.bi_private;
1700         slap_callback   *cb;
1701         int gotstate = 0, nochange = 0, do_present = 1;
1702         Filter *fand, *fava;
1703         syncops *sop = NULL;
1704         searchstate *ss;
1705         sync_control *srs;
1706         struct berval ctxcsn;
1707         char csnbuf[LDAP_LUTIL_CSNSTR_BUFSIZE];
1708
1709         if ( !(op->o_sync_mode & SLAP_SYNC_REFRESH) ) return SLAP_CB_CONTINUE;
1710
1711         if ( op->ors_deref & LDAP_DEREF_SEARCHING ) {
1712                 send_ldap_error( op, rs, LDAP_PROTOCOL_ERROR, "illegal value for derefAliases" );
1713                 return rs->sr_err;
1714         }
1715
1716         srs = op->o_controls[slap_cids.sc_LDAPsync];
1717
1718         /* If this is a persistent search, set it up right away */
1719         if ( op->o_sync_mode & SLAP_SYNC_PERSIST ) {
1720                 syncops so = {0};
1721                 fbase_cookie fc;
1722                 opcookie opc;
1723                 slap_callback sc;
1724
1725                 fc.fss = &so;
1726                 fc.fbase = 0;
1727                 so.s_eid = NOID;
1728                 so.s_op = op;
1729                 so.s_flags = PS_IS_REFRESHING;
1730                 /* syncprov_findbase expects to be called as a callback... */
1731                 sc.sc_private = &opc;
1732                 opc.son = on;
1733                 cb = op->o_callback;
1734                 op->o_callback = &sc;
1735                 rs->sr_err = syncprov_findbase( op, &fc );
1736                 op->o_callback = cb;
1737
1738                 if ( rs->sr_err != LDAP_SUCCESS ) {
1739                         send_ldap_result( op, rs );
1740                         return rs->sr_err;
1741                 }
1742                 sop = ch_malloc( sizeof( syncops ));
1743                 *sop = so;
1744                 ldap_pvt_thread_mutex_init( &sop->s_mutex );
1745                 sop->s_rid = srs->sr_state.rid;
1746                 sop->s_inuse = 1;
1747
1748                 ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
1749                 sop->s_next = si->si_ops;
1750                 si->si_ops = sop;
1751                 ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
1752         }
1753
1754         /* snapshot the ctxcsn */
1755         ldap_pvt_thread_mutex_lock( &si->si_csn_mutex );
1756         strcpy( csnbuf, si->si_ctxcsnbuf );
1757         ctxcsn.bv_len = si->si_ctxcsn.bv_len;
1758         ldap_pvt_thread_mutex_unlock( &si->si_csn_mutex );
1759         ctxcsn.bv_val = csnbuf;
1760
1761         /* If we have a cookie, handle the PRESENT lookups */
1762         if ( srs->sr_state.ctxcsn ) {
1763                 sessionlog *sl;
1764
1765                 /* The cookie was validated when it was parsed, just use it */
1766
1767                 /* If just Refreshing and nothing has changed, shortcut it */
1768                 if ( bvmatch( srs->sr_state.ctxcsn, &ctxcsn )) {
1769                         nochange = 1;
1770                         if ( !(op->o_sync_mode & SLAP_SYNC_PERSIST) ) {
1771                                 LDAPControl     *ctrls[2];
1772
1773                                 ctrls[0] = NULL;
1774                                 ctrls[1] = NULL;
1775                                 syncprov_done_ctrl( op, rs, ctrls, 0, 0,
1776                                         NULL, LDAP_SYNC_REFRESH_DELETES );
1777                                 rs->sr_ctrls = ctrls;
1778                                 rs->sr_err = LDAP_SUCCESS;
1779                                 send_ldap_result( op, rs );
1780                                 rs->sr_ctrls = NULL;
1781                                 return rs->sr_err;
1782                         }
1783                         goto shortcut;
1784                 }
1785                 /* Do we have a sessionlog for this search? */
1786                 sl=si->si_logs;
1787                 if ( sl ) {
1788                         ldap_pvt_thread_mutex_lock( &sl->sl_mutex );
1789                         if ( ber_bvcmp( srs->sr_state.ctxcsn, &sl->sl_mincsn ) >= 0 ) {
1790                                 do_present = 0;
1791                                 /* mutex is unlocked in playlog */
1792                                 syncprov_playlog( op, rs, sl, srs->sr_state.ctxcsn, &ctxcsn );
1793                         } else {
1794                                 ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
1795                         }
1796                 }
1797                 /* Is the CSN still present in the database? */
1798                 if ( syncprov_findcsn( op, FIND_CSN ) != LDAP_SUCCESS ) {
1799                         /* No, so a reload is required */
1800 #if 0           /* the consumer doesn't seem to send this hint */
1801                         if ( op->o_sync_rhint == 0 ) {
1802                                 send_ldap_error( op, rs, LDAP_SYNC_REFRESH_REQUIRED, "sync cookie is stale" );
1803                                 return rs->sr_err;
1804                         }
1805 #endif
1806                 } else {
1807                         gotstate = 1;
1808                         /* If changed and doing Present lookup, send Present UUIDs */
1809                         if ( do_present && syncprov_findcsn( op, FIND_PRESENT ) !=
1810                                 LDAP_SUCCESS ) {
1811                                 send_ldap_result( op, rs );
1812                                 return rs->sr_err;
1813                         }
1814                 }
1815         }
1816
1817 shortcut:
1818         /* Append CSN range to search filter, save original filter
1819          * for persistent search evaluation
1820          */
1821         if ( sop ) {
1822                 sop->s_filterstr= op->ors_filterstr;
1823         }
1824
1825         fand = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
1826         fand->f_choice = LDAP_FILTER_AND;
1827         fand->f_next = NULL;
1828         fava = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
1829         fava->f_choice = LDAP_FILTER_LE;
1830         fava->f_ava = op->o_tmpalloc( sizeof(AttributeAssertion), op->o_tmpmemctx );
1831         fava->f_ava->aa_desc = slap_schema.si_ad_entryCSN;
1832         ber_dupbv_x( &fava->f_ava->aa_value, &ctxcsn, op->o_tmpmemctx );
1833         fand->f_and = fava;
1834         if ( gotstate ) {
1835                 fava->f_next = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
1836                 fava = fava->f_next;
1837                 fava->f_choice = LDAP_FILTER_GE;
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, srs->sr_state.ctxcsn, op->o_tmpmemctx );
1841         }
1842         fava->f_next = op->ors_filter;
1843         op->ors_filter = fand;
1844         filter2bv_x( op, op->ors_filter, &op->ors_filterstr );
1845
1846         /* Let our callback add needed info to returned entries */
1847         cb = op->o_tmpcalloc(1, sizeof(slap_callback)+sizeof(searchstate), op->o_tmpmemctx);
1848         ss = (searchstate *)(cb+1);
1849         ss->ss_on = on;
1850         ss->ss_so = sop;
1851         ss->ss_present = do_present;
1852         cb->sc_response = syncprov_search_response;
1853         cb->sc_cleanup = syncprov_search_cleanup;
1854         cb->sc_private = ss;
1855         cb->sc_next = op->o_callback;
1856         op->o_callback = cb;
1857
1858 #if 0   /* I don't think we need to shortcircuit back-bdb any more */
1859         op->o_sync_mode &= SLAP_CONTROL_MASK;
1860 #endif
1861
1862         /* If this is a persistent search and no changes were reported during
1863          * the refresh phase, just invoke the response callback to transition
1864          * us into persist phase
1865          */
1866         if ( nochange ) {
1867                 rs->sr_err = LDAP_SUCCESS;
1868                 rs->sr_nentries = 0;
1869                 send_ldap_result( op, rs );
1870                 return rs->sr_err;
1871         }
1872         return SLAP_CB_CONTINUE;
1873 }
1874
1875 static int
1876 syncprov_operational(
1877         Operation *op,
1878         SlapReply *rs )
1879 {
1880         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
1881         syncprov_info_t         *si = (syncprov_info_t *)on->on_bi.bi_private;
1882
1883         if ( rs->sr_entry &&
1884                 dn_match( &rs->sr_entry->e_nname, op->o_bd->be_nsuffix )) {
1885
1886                 if ( SLAP_OPATTRS( rs->sr_attr_flags ) ||
1887                         ad_inlist( slap_schema.si_ad_contextCSN, rs->sr_attrs )) {
1888                         Attribute *a, **ap = NULL;
1889
1890                         for ( a=rs->sr_entry->e_attrs; a; a=a->a_next ) {
1891                                 if ( a->a_desc == slap_schema.si_ad_contextCSN )
1892                                         break;
1893                         }
1894
1895                         if ( !a ) {
1896                                 for ( ap = &rs->sr_operational_attrs; *ap; ap=&(*ap)->a_next );
1897
1898                                 a = ch_malloc( sizeof(Attribute));
1899                                 a->a_desc = slap_schema.si_ad_contextCSN;
1900                                 a->a_vals = ch_malloc( 2 * sizeof(struct berval));
1901                                 a->a_vals[1].bv_val = NULL;
1902                                 a->a_nvals = a->a_vals;
1903                                 a->a_next = NULL;
1904                                 a->a_flags = 0;
1905                                 *ap = a;
1906                         }
1907
1908                         ldap_pvt_thread_mutex_lock( &si->si_csn_mutex );
1909                         if ( !ap ) {
1910                                 strcpy( a->a_vals[0].bv_val, si->si_ctxcsnbuf );
1911                         } else {
1912                                 ber_dupbv( &a->a_vals[0], &si->si_ctxcsn );
1913                         }
1914                         ldap_pvt_thread_mutex_unlock( &si->si_csn_mutex );
1915                 }
1916         }
1917         return SLAP_CB_CONTINUE;
1918 }
1919
1920 static int
1921 syncprov_db_config(
1922         BackendDB       *be,
1923         const char      *fname,
1924         int             lineno,
1925         int             argc,
1926         char    **argv
1927 )
1928 {
1929         slap_overinst           *on = (slap_overinst *)be->bd_info;
1930         syncprov_info_t         *si = (syncprov_info_t *)on->on_bi.bi_private;
1931
1932         if ( strcasecmp( argv[ 0 ], "syncprov-checkpoint" ) == 0 ) {
1933                 if ( argc != 3 ) {
1934                         fprintf( stderr, "%s: line %d: wrong number of arguments in "
1935                                 "\"syncprov-checkpoint <ops> <minutes>\"\n", fname, lineno );
1936                         return -1;
1937                 }
1938                 si->si_chkops = atoi( argv[1] );
1939                 si->si_chktime = atoi( argv[2] ) * 60;
1940                 return 0;
1941
1942         } else if ( strcasecmp( argv[0], "syncprov-sessionlog" ) == 0 ) {
1943                 sessionlog *sl;
1944                 int size;
1945                 if ( argc != 2 ) {
1946                         fprintf( stderr, "%s: line %d: wrong number of arguments in "
1947                                 "\"syncprov-sessionlog <size>\"\n", fname, lineno );
1948                         return -1;
1949                 }
1950                 size = atoi( argv[1] );
1951                 if ( size < 0 ) {
1952                         fprintf( stderr,
1953                                 "%s: line %d: session log size %d is negative\n",
1954                                 fname, lineno, size );
1955                         return -1;
1956                 }
1957                 sl = si->si_logs;
1958                 if ( !sl ) {
1959                         sl = ch_malloc( sizeof( sessionlog ) + LDAP_LUTIL_CSNSTR_BUFSIZE );
1960                         sl->sl_mincsn.bv_val = (char *)(sl+1);
1961                         sl->sl_mincsn.bv_len = 0;
1962                         sl->sl_num = 0;
1963                         sl->sl_head = sl->sl_tail = NULL;
1964                         ldap_pvt_thread_mutex_init( &sl->sl_mutex );
1965                         si->si_logs = sl;
1966                 }
1967                 sl->sl_size = size;
1968                 return 0;
1969         }
1970
1971         return SLAP_CONF_UNKNOWN;
1972 }
1973
1974 /* Cheating - we have no thread pool context for these functions,
1975  * so make one.
1976  */
1977 typedef struct thread_keys {
1978         void *key;
1979         void *data;
1980         ldap_pvt_thread_pool_keyfree_t *xfree;
1981 } thread_keys;
1982
1983 #define MAXKEYS 32
1984 /* A fake thread context */
1985 static thread_keys thrctx[MAXKEYS];
1986
1987 /* Read any existing contextCSN from the underlying db.
1988  * Then search for any entries newer than that. If no value exists,
1989  * just generate it. Cache whatever result.
1990  */
1991 static int
1992 syncprov_db_open(
1993     BackendDB *be
1994 )
1995 {
1996         slap_overinst   *on = (slap_overinst *) be->bd_info;
1997         syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
1998
1999         Connection conn;
2000         char opbuf[OPERATION_BUFFER_SIZE];
2001         char ctxcsnbuf[LDAP_LUTIL_CSNSTR_BUFSIZE];
2002         Operation *op = (Operation *)opbuf;
2003         Entry *e;
2004         Attribute *a;
2005         int rc;
2006
2007         connection_fake_init( &conn, op, thrctx );
2008         op->o_bd = be;
2009         op->o_dn = be->be_rootdn;
2010         op->o_ndn = be->be_rootndn;
2011
2012         ctxcsnbuf[0] = '\0';
2013
2014         op->o_bd->bd_info = on->on_info->oi_orig;
2015         rc = be_entry_get_rw( op, be->be_nsuffix, NULL,
2016                 slap_schema.si_ad_contextCSN, 0, &e );
2017
2018         if ( e ) {
2019                 a = attr_find( e->e_attrs, slap_schema.si_ad_contextCSN );
2020                 if ( a ) {
2021                         si->si_ctxcsn.bv_len = a->a_nvals[0].bv_len;
2022                         if ( si->si_ctxcsn.bv_len >= sizeof(si->si_ctxcsnbuf ))
2023                                 si->si_ctxcsn.bv_len = sizeof(si->si_ctxcsnbuf)-1;
2024                         strncpy( si->si_ctxcsnbuf, a->a_nvals[0].bv_val,
2025                                 si->si_ctxcsn.bv_len );
2026                         si->si_ctxcsnbuf[si->si_ctxcsn.bv_len] = '\0';
2027                         strcpy( ctxcsnbuf, si->si_ctxcsnbuf );
2028                 }
2029                 be_entry_release_rw( op, e, 0 );
2030                 op->o_bd->bd_info = (BackendInfo *)on;
2031                 op->o_req_dn = be->be_suffix[0];
2032                 op->o_req_ndn = be->be_nsuffix[0];
2033                 op->ors_scope = LDAP_SCOPE_SUBTREE;
2034                 syncprov_findcsn( op, FIND_MAXCSN );
2035         }
2036
2037         if ( BER_BVISEMPTY( &si->si_ctxcsn ) ) {
2038                 slap_get_csn( op, si->si_ctxcsnbuf, sizeof(si->si_ctxcsnbuf),
2039                                 &si->si_ctxcsn, 0 );
2040         }
2041
2042         /* If our ctxcsn is different from what was read from the root
2043          * entry, write the new value out.
2044          */
2045         if ( strcmp( si->si_ctxcsnbuf, ctxcsnbuf )) {
2046                 SlapReply rs = {REP_RESULT};
2047                 syncprov_checkpoint( op, &rs, on );
2048         }
2049
2050         op->o_bd->bd_info = (BackendInfo *)on;
2051         return 0;
2052 }
2053
2054 /* Write the current contextCSN into the underlying db.
2055  */
2056 static int
2057 syncprov_db_close(
2058     BackendDB *be
2059 )
2060 {
2061     slap_overinst   *on = (slap_overinst *) be->bd_info;
2062     syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
2063         int i;
2064
2065         if ( si->si_numops ) {
2066                 Connection conn;
2067                 char opbuf[OPERATION_BUFFER_SIZE];
2068                 Operation *op = (Operation *)opbuf;
2069                 SlapReply rs = {REP_RESULT};
2070
2071                 connection_fake_init( &conn, op, thrctx );
2072                 op->o_bd = be;
2073                 op->o_dn = be->be_rootdn;
2074                 op->o_ndn = be->be_rootndn;
2075                 syncprov_checkpoint( op, &rs, on );
2076         }
2077         for ( i=0; thrctx[i].key; i++) {
2078                 if ( thrctx[i].xfree )
2079                         thrctx[i].xfree( thrctx[i].key, thrctx[i].data );
2080                 thrctx[i].key = NULL;
2081         }
2082
2083     return 0;
2084 }
2085
2086 static int
2087 syncprov_db_init(
2088         BackendDB *be
2089 )
2090 {
2091         slap_overinst   *on = (slap_overinst *)be->bd_info;
2092         syncprov_info_t *si;
2093
2094         si = ch_calloc(1, sizeof(syncprov_info_t));
2095         on->on_bi.bi_private = si;
2096         ldap_pvt_thread_mutex_init( &si->si_csn_mutex );
2097         ldap_pvt_thread_mutex_init( &si->si_ops_mutex );
2098         ldap_pvt_thread_mutex_init( &si->si_mods_mutex );
2099         si->si_ctxcsn.bv_val = si->si_ctxcsnbuf;
2100
2101         csn_anlist[0].an_desc = slap_schema.si_ad_entryCSN;
2102         csn_anlist[0].an_name = slap_schema.si_ad_entryCSN->ad_cname;
2103
2104         uuid_anlist[0].an_desc = slap_schema.si_ad_entryUUID;
2105         uuid_anlist[0].an_name = slap_schema.si_ad_entryUUID->ad_cname;
2106
2107         return 0;
2108 }
2109
2110 static int
2111 syncprov_db_destroy(
2112         BackendDB *be
2113 )
2114 {
2115         slap_overinst   *on = (slap_overinst *)be->bd_info;
2116         syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
2117
2118         if ( si ) {
2119                 ldap_pvt_thread_mutex_destroy( &si->si_mods_mutex );
2120                 ldap_pvt_thread_mutex_destroy( &si->si_ops_mutex );
2121                 ldap_pvt_thread_mutex_destroy( &si->si_csn_mutex );
2122                 ch_free( si );
2123         }
2124
2125         return 0;
2126 }
2127
2128 static int syncprov_parseCtrl (
2129         Operation *op,
2130         SlapReply *rs,
2131         LDAPControl *ctrl )
2132 {
2133         ber_tag_t tag;
2134         BerElement *ber;
2135         ber_int_t mode;
2136         ber_len_t len;
2137         struct berval cookie = BER_BVNULL;
2138         sync_control *sr;
2139         int rhint = 0;
2140
2141         if ( op->o_sync != SLAP_CONTROL_NONE ) {
2142                 rs->sr_text = "Sync control specified multiple times";
2143                 return LDAP_PROTOCOL_ERROR;
2144         }
2145
2146         if ( op->o_pagedresults != SLAP_CONTROL_NONE ) {
2147                 rs->sr_text = "Sync control specified with pagedResults control";
2148                 return LDAP_PROTOCOL_ERROR;
2149         }
2150
2151         if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
2152                 rs->sr_text = "Sync control value is empty (or absent)";
2153                 return LDAP_PROTOCOL_ERROR;
2154         }
2155
2156         /* Parse the control value
2157          *      syncRequestValue ::= SEQUENCE {
2158          *              mode   ENUMERATED {
2159          *                      -- 0 unused
2160          *                      refreshOnly             (1),
2161          *                      -- 2 reserved
2162          *                      refreshAndPersist       (3)
2163          *              },
2164          *              cookie  syncCookie OPTIONAL
2165          *      }
2166          */
2167
2168         ber = ber_init( &ctrl->ldctl_value );
2169         if( ber == NULL ) {
2170                 rs->sr_text = "internal error";
2171                 return LDAP_OTHER;
2172         }
2173
2174         if ( (tag = ber_scanf( ber, "{i" /*}*/, &mode )) == LBER_ERROR ) {
2175                 rs->sr_text = "Sync control : mode decoding error";
2176                 return LDAP_PROTOCOL_ERROR;
2177         }
2178
2179         switch( mode ) {
2180         case LDAP_SYNC_REFRESH_ONLY:
2181                 mode = SLAP_SYNC_REFRESH;
2182                 break;
2183         case LDAP_SYNC_REFRESH_AND_PERSIST:
2184                 mode = SLAP_SYNC_REFRESH_AND_PERSIST;
2185                 break;
2186         default:
2187                 rs->sr_text = "Sync control : unknown update mode";
2188                 return LDAP_PROTOCOL_ERROR;
2189         }
2190
2191         tag = ber_peek_tag( ber, &len );
2192
2193         if ( tag == LDAP_TAG_SYNC_COOKIE ) {
2194                 if (( ber_scanf( ber, /*{*/ "o", &cookie )) == LBER_ERROR ) {
2195                         rs->sr_text = "Sync control : cookie decoding error";
2196                         return LDAP_PROTOCOL_ERROR;
2197                 }
2198         }
2199         if ( tag == LDAP_TAG_RELOAD_HINT ) {
2200                 if (( ber_scanf( ber, /*{*/ "b", &rhint )) == LBER_ERROR ) {
2201                         rs->sr_text = "Sync control : rhint decoding error";
2202                         return LDAP_PROTOCOL_ERROR;
2203                 }
2204         }
2205         if (( ber_scanf( ber, /*{*/ "}")) == LBER_ERROR ) {
2206                         rs->sr_text = "Sync control : decoding error";
2207                         return LDAP_PROTOCOL_ERROR;
2208         }
2209         sr = op->o_tmpcalloc( 1, sizeof(struct sync_control), op->o_tmpmemctx );
2210         sr->sr_rhint = rhint;
2211         if (!BER_BVISNULL(&cookie)) {
2212                 ber_bvarray_add( &sr->sr_state.octet_str, &cookie );
2213                 slap_parse_sync_cookie( &sr->sr_state );
2214         }
2215
2216         op->o_controls[slap_cids.sc_LDAPsync] = sr;
2217
2218         (void) ber_free( ber, 1 );
2219
2220         op->o_sync = ctrl->ldctl_iscritical
2221                 ? SLAP_CONTROL_CRITICAL
2222                 : SLAP_CONTROL_NONCRITICAL;
2223
2224         op->o_sync_mode |= mode;        /* o_sync_mode shares o_sync */
2225
2226         return LDAP_SUCCESS;
2227 }
2228
2229 /* This overlay is set up for dynamic loading via moduleload. For static
2230  * configuration, you'll need to arrange for the slap_overinst to be
2231  * initialized and registered by some other function inside slapd.
2232  */
2233
2234 static slap_overinst            syncprov;
2235
2236 int
2237 syncprov_init()
2238 {
2239         int rc;
2240
2241         rc = register_supported_control( LDAP_CONTROL_SYNC,
2242                 SLAP_CTRL_HIDE|SLAP_CTRL_SEARCH, NULL,
2243                 syncprov_parseCtrl, &slap_cids.sc_LDAPsync );
2244         if ( rc != LDAP_SUCCESS ) {
2245                 fprintf( stderr, "Failed to register control %d\n", rc );
2246                 return rc;
2247         }
2248
2249         syncprov.on_bi.bi_type = "syncprov";
2250         syncprov.on_bi.bi_db_init = syncprov_db_init;
2251         syncprov.on_bi.bi_db_config = syncprov_db_config;
2252         syncprov.on_bi.bi_db_destroy = syncprov_db_destroy;
2253         syncprov.on_bi.bi_db_open = syncprov_db_open;
2254         syncprov.on_bi.bi_db_close = syncprov_db_close;
2255
2256         syncprov.on_bi.bi_op_abandon = syncprov_op_abandon;
2257         syncprov.on_bi.bi_op_cancel = syncprov_op_abandon;
2258
2259         syncprov.on_bi.bi_op_add = syncprov_op_mod;
2260         syncprov.on_bi.bi_op_compare = syncprov_op_compare;
2261         syncprov.on_bi.bi_op_delete = syncprov_op_mod;
2262         syncprov.on_bi.bi_op_modify = syncprov_op_mod;
2263         syncprov.on_bi.bi_op_modrdn = syncprov_op_mod;
2264         syncprov.on_bi.bi_op_search = syncprov_op_search;
2265         syncprov.on_bi.bi_extended = syncprov_op_extended;
2266         syncprov.on_bi.bi_operational = syncprov_operational;
2267
2268         return overlay_register( &syncprov );
2269 }
2270
2271 #if SLAPD_OVER_SYNCPROV == SLAPD_MOD_DYNAMIC
2272 int
2273 init_module( int argc, char *argv[] )
2274 {
2275         return syncprov_init();
2276 }
2277 #endif /* SLAPD_OVER_SYNCPROV == SLAPD_MOD_DYNAMIC */
2278
2279 #endif /* defined(SLAPD_OVER_SYNCPROV) */