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 static int
 254 syncprov_sendinfo(
 255         Operation       *op,
 256         SlapReply       *rs,
 257         int                     type,
 258         struct berval *cookie,
 259         int                     refreshDone,
 260         BerVarray       syncUUIDs,
 261         int                     refreshDeletes )
 262 {
 263         BerElementBuffer berbuf;
 264         BerElement *ber = (BerElement *)&berbuf;
 265         struct berval rspdata;
 266
 267         int ret;
 268
 269         ber_init2( ber, NULL, LBER_USE_DER );
 270         ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
 271
 272         if ( type ) {
 273                 switch ( type ) {
 274                 case LDAP_TAG_SYNC_NEW_COOKIE:
 275                         ber_printf( ber, "tO", type, cookie );
 276                         break;
 277                 case LDAP_TAG_SYNC_REFRESH_DELETE:
 278                 case LDAP_TAG_SYNC_REFRESH_PRESENT:
 279                         ber_printf( ber, "t{", type );
 280                         if ( cookie ) {
 281                                 ber_printf( ber, "O", cookie );
 282                         }
 283                         if ( refreshDone == 0 ) {
 284                                 ber_printf( ber, "b", refreshDone );
 285                         }
 286                         ber_printf( ber, "N}" );
 287                         break;
 288                 case LDAP_TAG_SYNC_ID_SET:
 289                         ber_printf( ber, "t{", type );
 290                         if ( cookie ) {
 291                                 ber_printf( ber, "O", cookie );
 292                         }
 293                         if ( refreshDeletes == 1 ) {
 294                                 ber_printf( ber, "b", refreshDeletes );
 295                         }
 296                         ber_printf( ber, "[W]", syncUUIDs );
 297                         ber_printf( ber, "N}" );
 298                         break;
 299                 default:
 300                         Debug( LDAP_DEBUG_TRACE,
 301                                 "syncprov_sendinfo: invalid syncinfo type (%d)\n",
 302                                 type, 0, 0 );
 303                         return LDAP_OTHER;
 304                 }
 305         }
 306
 307         ret = ber_flatten2( ber, &rspdata, 0 );
 308
 309         if ( ret < 0 ) {
 310                 Debug( LDAP_DEBUG_TRACE,
 311                         "syncprov_sendinfo: ber_flatten2 failed\n",
 312                         0, 0, 0 );
 313                 send_ldap_error( op, rs, LDAP_OTHER, "internal error" );
 314                 return ret;
 315         }
 316
 317         rs->sr_rspoid = LDAP_SYNC_INFO;
 318         rs->sr_rspdata = &rspdata;
 319         send_ldap_intermediate( op, rs );
 320         rs->sr_rspdata = NULL;
 321         ber_free_buf( ber );
 322
 323         return LDAP_SUCCESS;
 324 }
 325
 326 /* Find a modtarget in an AVL tree */
 327 static int
 328 sp_avl_cmp( const void *c1, const void *c2 )
 329 {
 330         const modtarget *m1, *m2;
 331         int rc;
 332
 333         m1 = c1; m2 = c2;
 334         rc = m1->mt_op->o_req_ndn.bv_len - m2->mt_op->o_req_ndn.bv_len;
 335
 336         if ( rc ) return rc;
 337         return ber_bvcmp( &m1->mt_op->o_req_ndn, &m2->mt_op->o_req_ndn );
 338 }
 339
 340 /* syncprov_findbase:
 341  *   finds the true DN of the base of a search (with alias dereferencing) and
 342  * checks to make sure the base entry doesn't get replaced with a different
 343  * entry (e.g., swapping trees via ModDN, or retargeting an alias). If a
 344  * change is detected, any persistent search on this base must be terminated /
 345  * reloaded.
 346  *   On the first call, we just save the DN and entryID. On subsequent calls
 347  * we compare the DN and entryID with the saved values.
 348  */
 349 static int
 350 findbase_cb( Operation *op, SlapReply *rs )
 351 {
 352         slap_callback *sc = op->o_callback;
 353
 354         if ( rs->sr_type == REP_SEARCH && rs->sr_err == LDAP_SUCCESS ) {
 355                 fbase_cookie *fc = sc->sc_private;
 356
 357                 /* If no entryID, we're looking for the first time.
 358                  * Just store whatever we got.
 359                  */
 360                 if ( fc->fss->s_eid == NOID ) {
 361                         fc->fbase = 1;
 362                         fc->fss->s_eid = rs->sr_entry->e_id;
 363                         ber_dupbv( &fc->fss->s_base, &rs->sr_entry->e_nname );
 364
 365                 } else if ( rs->sr_entry->e_id == fc->fss->s_eid &&
 366                         dn_match( &rs->sr_entry->e_nname, &fc->fss->s_base )) {
 367
 368                 /* OK, the DN is the same and the entryID is the same. Now
 369                  * see if the fdn resides in the scope.
 370                  */
 371                         fc->fbase = 1;
 372                         switch ( fc->fss->s_op->ors_scope ) {
 373                         case LDAP_SCOPE_BASE:
 374                                 fc->fscope = dn_match( fc->fdn, &rs->sr_entry->e_nname );
 375                                 break;
 376                         case LDAP_SCOPE_ONELEVEL: {
 377                                 struct berval pdn;
 378                                 dnParent( fc->fdn, &pdn );
 379                                 fc->fscope = dn_match( &pdn, &rs->sr_entry->e_nname );
 380                                 break; }
 381                         case LDAP_SCOPE_SUBTREE:
 382                                 fc->fscope = dnIsSuffix( fc->fdn, &rs->sr_entry->e_nname );
 383                                 break;
 384 #ifdef LDAP_SCOPE_SUBORDINATE
 385                         case LDAP_SCOPE_SUBORDINATE:
 386                                 fc->fscope = dnIsSuffix( fc->fdn, &rs->sr_entry->e_nname ) &&
 387                                         !dn_match( fc->fdn, &rs->sr_entry->e_nname );
 388                                 break;
 389 #endif
 390                         }
 391                 }
 392         }
 393         if ( rs->sr_err != LDAP_SUCCESS ) {
 394                 Debug( LDAP_DEBUG_ANY, "findbase failed! %d\n", rs->sr_err,0,0 );
 395         }
 396         return LDAP_SUCCESS;
 397 }
 398
 399 static int
 400 syncprov_findbase( Operation *op, fbase_cookie *fc )
 401 {
 402         opcookie *opc = op->o_callback->sc_private;
 403         slap_overinst *on = opc->son;
 404         syncprov_info_t         *si = on->on_bi.bi_private;
 405
 406         slap_callback cb = {0};
 407         Operation fop;
 408         SlapReply frs = { REP_RESULT };
 409         int rc;
 410
 411         fop = *op;
 412
 413         cb.sc_response = findbase_cb;
 414         cb.sc_private = fc;
 415
 416         fop.o_sync_mode &= SLAP_CONTROL_MASK;   /* turn off sync mode */
 417         fop.o_managedsait = SLAP_CONTROL_CRITICAL;
 418         fop.o_callback = &cb;
 419         fop.o_tag = LDAP_REQ_SEARCH;
 420         fop.ors_scope = LDAP_SCOPE_BASE;
 421         fop.ors_deref = fc->fss->s_op->ors_deref;
 422         fop.ors_limit = NULL;
 423         fop.ors_slimit = 1;
 424         fop.ors_tlimit = SLAP_NO_LIMIT;
 425         fop.ors_attrs = slap_anlist_no_attrs;
 426         fop.ors_attrsonly = 1;
 427         fop.ors_filter = fc->fss->s_op->ors_filter;
 428         fop.ors_filterstr = fc->fss->s_op->ors_filterstr;
 429
 430         fop.o_req_ndn = fc->fss->s_op->o_req_ndn;
 431
 432         fop.o_bd->bd_info = on->on_info->oi_orig;
 433         rc = fop.o_bd->be_search( &fop, &frs );
 434         fop.o_bd->bd_info = (BackendInfo *)on;
 435
 436         if ( fc->fbase ) return LDAP_SUCCESS;
 437
 438         /* If entryID has changed, then the base of this search has
 439          * changed. Invalidate the psearch.
 440          */
 441         return LDAP_NO_SUCH_OBJECT;
 442 }
 443
 444 /* syncprov_findcsn:
 445  *   This function has three different purposes, but they all use a search
 446  * that filters on entryCSN so they're combined here.
 447  * 1: at startup time, after a contextCSN has been read from the database,
 448  * we search for all entries with CSN >= contextCSN in case the contextCSN
 449  * was not checkpointed at the previous shutdown.
 450  *
 451  * 2: when the current contextCSN is known and we have a sync cookie, we search
 452  * for one entry with CSN <= the cookie CSN. (Used to search for =.) If an
 453  * entry is found, the cookie CSN is valid, otherwise it is stale.
 454  *
 455  * 3: during a refresh phase, we search for all entries with CSN <= the cookie
 456  * CSN, and generate Present records for them. We always collect this result
 457  * in SyncID sets, even if there's only one match.
 458  */
 459 #define FIND_MAXCSN     1
 460 #define FIND_CSN        2
 461 #define FIND_PRESENT    3
 462
 463 static int
 464 findmax_cb( Operation *op, SlapReply *rs )
 465 {
 466         if ( rs->sr_type == REP_SEARCH && rs->sr_err == LDAP_SUCCESS ) {
 467                 struct berval *maxcsn = op->o_callback->sc_private;
 468                 Attribute *a = attr_find( rs->sr_entry->e_attrs,
 469                         slap_schema.si_ad_entryCSN );
 470
 471                 if ( a && ber_bvcmp( &a->a_vals[0], maxcsn ) > 0 ) {
 472                         maxcsn->bv_len = a->a_vals[0].bv_len;
 473                         strcpy( maxcsn->bv_val, a->a_vals[0].bv_val );
 474                 }
 475         }
 476         return LDAP_SUCCESS;
 477 }
 478
 479 static int
 480 findcsn_cb( Operation *op, SlapReply *rs )
 481 {
 482         slap_callback *sc = op->o_callback;
 483
 484         if ( rs->sr_type == REP_SEARCH && rs->sr_err == LDAP_SUCCESS ) {
 485                 sc->sc_private = (void *)1;
 486         }
 487         return LDAP_SUCCESS;
 488 }
 489
 490 /* Build a list of entryUUIDs for sending in a SyncID set */
 491
 492 #define UUID_LEN        16
 493
 494 typedef struct fpres_cookie {
 495         int num;
 496         BerVarray uuids;
 497         char *last;
 498 } fpres_cookie;
 499
 500 static int
 501 findpres_cb( Operation *op, SlapReply *rs )
 502 {
 503         slap_callback *sc = op->o_callback;
 504         fpres_cookie *pc = sc->sc_private;
 505         Attribute *a;
 506         int ret = SLAP_CB_CONTINUE;
 507
 508         switch ( rs->sr_type ) {
 509         case REP_SEARCH:
 510                 a = attr_find( rs->sr_entry->e_attrs, slap_schema.si_ad_entryUUID );
 511                 if ( a ) {
 512                         pc->uuids[pc->num].bv_val = pc->last;
 513                         AC_MEMCPY( pc->uuids[pc->num].bv_val, a->a_nvals[0].bv_val,
 514                                 pc->uuids[pc->num].bv_len );
 515                         pc->num++;
 516                         pc->last = pc->uuids[pc->num].bv_val;
 517                         pc->uuids[pc->num].bv_val = NULL;
 518                 }
 519                 ret = LDAP_SUCCESS;
 520                 if ( pc->num != SLAP_SYNCUUID_SET_SIZE )
 521                         break;
 522                 /* FALLTHRU */
 523         case REP_RESULT:
 524                 ret = rs->sr_err;
 525                 if ( pc->num ) {
 526                         ret = syncprov_sendinfo( op, rs, LDAP_TAG_SYNC_ID_SET, NULL,
 527                                 0, pc->uuids, 0 );
 528                         pc->uuids[pc->num].bv_val = pc->last;
 529                         pc->num = 0;
 530                         pc->last = pc->uuids[0].bv_val;
 531                 }
 532                 break;
 533         default:
 534                 break;
 535         }
 536         return ret;
 537 }
 538
 539 static int
 540 syncprov_findcsn( Operation *op, int mode )
 541 {
 542         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
 543         syncprov_info_t         *si = on->on_bi.bi_private;
 544
 545         slap_callback cb = {0};
 546         Operation fop;
 547         SlapReply frs = { REP_RESULT };
 548         char buf[LDAP_LUTIL_CSNSTR_BUFSIZE + STRLENOF("(entryCSN<=)")];
 549         char cbuf[LDAP_LUTIL_CSNSTR_BUFSIZE];
 550         struct berval fbuf, maxcsn;
 551         Filter cf, af;
 552 #ifdef LDAP_COMP_MATCH
 553         AttributeAssertion eq = { NULL, BER_BVNULL, NULL };
 554 #else
 555         AttributeAssertion eq = { NULL, BER_BVNULL };
 556 #endif
 557         int i, rc = LDAP_SUCCESS;
 558         fpres_cookie pcookie;
 559         sync_control *srs = NULL;
 560
 561         if ( mode != FIND_MAXCSN ) {
 562                 srs = op->o_controls[slap_cids.sc_LDAPsync];
 563
 564                 if ( srs->sr_state.ctxcsn.bv_len >= LDAP_LUTIL_CSNSTR_BUFSIZE ) {
 565                         return LDAP_OTHER;
 566                 }
 567         }
 568
 569         fop = *op;
 570         fop.o_sync_mode &= SLAP_CONTROL_MASK;   /* turn off sync_mode */
 571         /* We want pure entries, not referrals */
 572         fop.o_managedsait = SLAP_CONTROL_CRITICAL;
 573
 574         fbuf.bv_val = buf;
 575         cf.f_ava = &eq;
 576         cf.f_av_desc = slap_schema.si_ad_entryCSN;
 577         cf.f_next = NULL;
 578
 579         fop.o_callback = &cb;
 580         fop.ors_limit = NULL;
 581         fop.ors_tlimit = SLAP_NO_LIMIT;
 582         fop.ors_filter = &cf;
 583         fop.ors_filterstr = fbuf;
 584
 585         switch( mode ) {
 586         case FIND_MAXCSN:
 587                 cf.f_choice = LDAP_FILTER_GE;
 588                 cf.f_av_value = si->si_ctxcsn;
 589                 fbuf.bv_len = sprintf( buf, "(entryCSN>=%s)",
 590                         cf.f_av_value.bv_val );
 591                 fop.ors_attrsonly = 0;
 592                 fop.ors_attrs = csn_anlist;
 593                 fop.ors_slimit = SLAP_NO_LIMIT;
 594                 cb.sc_private = &maxcsn;
 595                 cb.sc_response = findmax_cb;
 596                 strcpy( cbuf, si->si_ctxcsn.bv_val );
 597                 maxcsn.bv_val = cbuf;
 598                 maxcsn.bv_len = si->si_ctxcsn.bv_len;
 599                 break;
 600         case FIND_CSN:
 601                 cf.f_choice = LDAP_FILTER_LE;
 602                 cf.f_av_value = srs->sr_state.ctxcsn;
 603                 fbuf.bv_len = sprintf( buf, "(entryCSN<=%s)",
 604                         cf.f_av_value.bv_val );
 605                 fop.ors_attrsonly = 1;
 606                 fop.ors_attrs = slap_anlist_no_attrs;
 607                 fop.ors_slimit = 1;
 608                 cb.sc_private = NULL;
 609                 cb.sc_response = findcsn_cb;
 610                 break;
 611         case FIND_PRESENT:
 612                 af.f_choice = LDAP_FILTER_AND;
 613                 af.f_next = NULL;
 614                 af.f_and = &cf;
 615                 cf.f_choice = LDAP_FILTER_LE;
 616                 cf.f_av_value = srs->sr_state.ctxcsn;
 617                 cf.f_next = op->ors_filter;
 618                 fop.ors_filter = &af;
 619                 filter2bv_x( &fop, fop.ors_filter, &fop.ors_filterstr );
 620                 fop.ors_attrsonly = 0;
 621                 fop.ors_attrs = uuid_anlist;
 622                 fop.ors_slimit = SLAP_NO_LIMIT;
 623                 cb.sc_private = &pcookie;
 624                 cb.sc_response = findpres_cb;
 625                 pcookie.num = 0;
 626
 627                 /* preallocate storage for a full set */
 628                 pcookie.uuids = op->o_tmpalloc( (SLAP_SYNCUUID_SET_SIZE+1) *
 629                         sizeof(struct berval) + SLAP_SYNCUUID_SET_SIZE * UUID_LEN,
 630                         op->o_tmpmemctx );
 631                 pcookie.last = (char *)(pcookie.uuids + SLAP_SYNCUUID_SET_SIZE+1);
 632                 pcookie.uuids[0].bv_val = pcookie.last;
 633                 pcookie.uuids[0].bv_len = UUID_LEN;
 634                 for (i=1; i<SLAP_SYNCUUID_SET_SIZE; i++) {
 635                         pcookie.uuids[i].bv_val = pcookie.uuids[i-1].bv_val + UUID_LEN;
 636                         pcookie.uuids[i].bv_len = UUID_LEN;
 637                 }
 638                 break;
 639         }
 640
 641         fop.o_bd->bd_info = on->on_info->oi_orig;
 642         fop.o_bd->be_search( &fop, &frs );
 643         fop.o_bd->bd_info = (BackendInfo *)on;
 644
 645         switch( mode ) {
 646         case FIND_MAXCSN:
 647                 strcpy( si->si_ctxcsnbuf, maxcsn.bv_val );
 648                 si->si_ctxcsn.bv_len = maxcsn.bv_len;
 649                 break;
 650         case FIND_CSN:
 651                 /* If matching CSN was not found, invalidate the context. */
 652                 if ( !cb.sc_private ) rc = LDAP_NO_SUCH_OBJECT;
 653                 break;
 654         case FIND_PRESENT:
 655                 op->o_tmpfree( pcookie.uuids, op->o_tmpmemctx );
 656                 op->o_tmpfree( fop.ors_filterstr.bv_val, op->o_tmpmemctx );
 657                 break;
 658         }
 659
 660         return rc;
 661 }
 662
 663 /* Queue a persistent search response if still in Refresh stage */
 664 static int
 665 syncprov_qresp( opcookie *opc, syncops *so, int mode )
 666 {
 667         syncres *sr;
 668
 669         sr = ch_malloc(sizeof(syncres) + opc->suuid.bv_len + 1 +
 670                 opc->sdn.bv_len + 1 + opc->sndn.bv_len + 1 + opc->sctxcsn.bv_len + 1 );
 671         sr->s_next = NULL;
 672         sr->s_dn.bv_val = (char *)(sr + 1);
 673         sr->s_mode = mode;
 674         sr->s_isreference = opc->sreference;
 675         sr->s_ndn.bv_val = lutil_strcopy( sr->s_dn.bv_val, opc->sdn.bv_val );
 676         *(sr->s_ndn.bv_val++) = '\0';
 677         sr->s_uuid.bv_val = lutil_strcopy( sr->s_ndn.bv_val, opc->sndn.bv_val );
 678         *(sr->s_uuid.bv_val++) = '\0';
 679         sr->s_csn.bv_val = lutil_strcopy( sr->s_uuid.bv_val, opc->suuid.bv_val );
 680
 681         if ( !so->s_res ) {
 682                 so->s_res = sr;
 683         } else {
 684                 so->s_restail->s_next = sr;
 685         }
 686         so->s_restail = sr;
 687         ldap_pvt_thread_mutex_unlock( &so->s_mutex );
 688         return LDAP_SUCCESS;
 689 }
 690
 691 /* Send a persistent search response */
 692 static int
 693 syncprov_sendresp( Operation *op, opcookie *opc, syncops *so, Entry *e, int mode, int queue )
 694 {
 695         slap_overinst *on = opc->son;
 696         syncprov_info_t *si = on->on_bi.bi_private;
 697
 698         SlapReply rs = { REP_SEARCH };
 699         LDAPControl *ctrls[2];
 700         struct berval cookie;
 701         Entry e_uuid = {0};
 702         Attribute a_uuid = {0};
 703         Operation sop = *so->s_op;
 704         Opheader ohdr;
 705
 706         ohdr = *sop.o_hdr;
 707         sop.o_hdr = &ohdr;
 708         sop.o_tmpmemctx = op->o_tmpmemctx;
 709         sop.o_bd = op->o_bd;
 710         sop.o_controls = op->o_controls;
 711
 712         if ( queue && (so->s_flags & PS_IS_REFRESHING) ) {
 713                 ldap_pvt_thread_mutex_lock( &so->s_mutex );
 714                 if ( so->s_flags & PS_IS_REFRESHING )
 715                         return syncprov_qresp( opc, so, mode );
 716                 ldap_pvt_thread_mutex_unlock( &so->s_mutex );
 717         }
 718
 719         ctrls[1] = NULL;
 720         slap_compose_sync_cookie( op, &cookie, &opc->sctxcsn, so->s_rid );
 721
 722         e_uuid.e_attrs = &a_uuid;
 723         a_uuid.a_desc = slap_schema.si_ad_entryUUID;
 724         a_uuid.a_nvals = &opc->suuid;
 725         rs.sr_err = syncprov_state_ctrl( &sop, &rs, &e_uuid,
 726                 mode, ctrls, 0, 1, &cookie );
 727
 728         rs.sr_entry = e;
 729         rs.sr_ctrls = ctrls;
 730         switch( mode ) {
 731         case LDAP_SYNC_ADD:
 732                 if ( opc->sreference ) {
 733                         rs.sr_ref = get_entry_referrals( &sop, e );
 734                         send_search_reference( &sop, &rs );
 735                         ber_bvarray_free( rs.sr_ref );
 736                         break;
 737                 }
 738                 /* fallthru */
 739         case LDAP_SYNC_MODIFY:
 740                 rs.sr_attrs = sop.ors_attrs;
 741                 send_search_entry( &sop, &rs );
 742                 break;
 743         case LDAP_SYNC_DELETE:
 744                 e_uuid.e_attrs = NULL;
 745                 e_uuid.e_name = opc->sdn;
 746                 e_uuid.e_nname = opc->sndn;
 747                 rs.sr_entry = &e_uuid;
 748                 if ( opc->sreference ) {
 749                         struct berval bv = BER_BVNULL;
 750                         rs.sr_ref = &bv;
 751                         send_search_reference( &sop, &rs );
 752                 } else {
 753                         send_search_entry( &sop, &rs );
 754                 }
 755                 break;
 756         default:
 757                 assert(0);
 758         }
 759         op->o_tmpfree( rs.sr_ctrls[0], op->o_tmpmemctx );
 760         rs.sr_ctrls = NULL;
 761         return rs.sr_err;
 762 }
 763
 764 static void
 765 syncprov_free_syncop( syncops *so )
 766 {
 767         syncres *sr, *srnext;
 768         GroupAssertion *ga, *gnext;
 769
 770         ldap_pvt_thread_mutex_lock( &so->s_mutex );
 771         so->s_inuse--;
 772         if ( so->s_inuse > 0 ) {
 773                 ldap_pvt_thread_mutex_unlock( &so->s_mutex );
 774                 return;
 775         }
 776         ldap_pvt_thread_mutex_unlock( &so->s_mutex );
 777         if ( so->s_flags & PS_IS_DETACHED ) {
 778                 filter_free( so->s_op->ors_filter );
 779                 for ( ga = so->s_op->o_groups; ga; ga=gnext ) {
 780                         gnext = ga->ga_next;
 781                         ch_free( ga );
 782                 }
 783                 ch_free( so->s_op );
 784         }
 785         ch_free( so->s_base.bv_val );
 786         for ( sr=so->s_res; sr; sr=srnext ) {
 787                 srnext = sr->s_next;
 788                 ch_free( sr );
 789         }
 790         ldap_pvt_thread_mutex_destroy( &so->s_mutex );
 791         ch_free( so );
 792 }
 793
 794 static int
 795 syncprov_drop_psearch( syncops *so, int lock )
 796 {
 797         if ( so->s_flags & PS_IS_DETACHED ) {
 798                 if ( lock )
 799                         ldap_pvt_thread_mutex_lock( &so->s_op->o_conn->c_mutex );
 800                 so->s_op->o_conn->c_n_ops_executing--;
 801                 so->s_op->o_conn->c_n_ops_completed++;
 802                 LDAP_STAILQ_REMOVE( &so->s_op->o_conn->c_ops, so->s_op, slap_op,
 803                         o_next );
 804                 if ( lock )
 805                         ldap_pvt_thread_mutex_unlock( &so->s_op->o_conn->c_mutex );
 806         }
 807         syncprov_free_syncop( so );
 808
 809         return 0;
 810 }
 811
 812 static int
 813 syncprov_ab_cleanup( Operation *op, SlapReply *rs )
 814 {
 815         slap_callback *sc = op->o_callback;
 816         op->o_callback = sc->sc_next;
 817         syncprov_drop_psearch( op->o_callback->sc_private, 0 );
 818         op->o_tmpfree( sc, op->o_tmpmemctx );
 819         return 0;
 820 }
 821
 822 static int
 823 syncprov_op_abandon( Operation *op, SlapReply *rs )
 824 {
 825         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
 826         syncprov_info_t         *si = on->on_bi.bi_private;
 827         syncops *so, *soprev;
 828
 829         ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
 830         for ( so=si->si_ops, soprev = (syncops *)&si->si_ops; so;
 831                 soprev=so, so=so->s_next ) {
 832                 if ( so->s_op->o_connid == op->o_connid &&
 833                         so->s_op->o_msgid == op->orn_msgid ) {
 834                                 so->s_op->o_abandon = 1;
 835                                 soprev->s_next = so->s_next;
 836                                 break;
 837                 }
 838         }
 839         ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
 840         if ( so ) {
 841                 /* Is this really a Cancel exop? */
 842                 if ( op->o_tag != LDAP_REQ_ABANDON ) {
 843                         so->s_op->o_cancel = SLAP_CANCEL_ACK;
 844                         rs->sr_err = LDAP_CANCELLED;
 845                         send_ldap_result( so->s_op, rs );
 846                         if ( so->s_flags & PS_IS_DETACHED ) {
 847                                 slap_callback *cb;
 848                                 cb = op->o_tmpcalloc( 1, sizeof(slap_callback), op->o_tmpmemctx );
 849                                 cb->sc_cleanup = syncprov_ab_cleanup;
 850                                 cb->sc_next = op->o_callback;
 851                                 cb->sc_private = so;
 852                                 return SLAP_CB_CONTINUE;
 853                         }
 854                 }
 855                 syncprov_drop_psearch( so, 0 );
 856         }
 857         return SLAP_CB_CONTINUE;
 858 }
 859
 860 /* Find which persistent searches are affected by this operation */
 861 static void
 862 syncprov_matchops( Operation *op, opcookie *opc, int saveit )
 863 {
 864         slap_overinst *on = opc->son;
 865         syncprov_info_t         *si = on->on_bi.bi_private;
 866
 867         fbase_cookie fc;
 868         syncops *ss, *sprev, *snext;
 869         Entry *e;
 870         Attribute *a;
 871         int rc;
 872         struct berval newdn;
 873         int freefdn = 0;
 874
 875         fc.fdn = &op->o_req_ndn;
 876         /* compute new DN */
 877         if ( op->o_tag == LDAP_REQ_MODRDN && !saveit ) {
 878                 struct berval pdn;
 879                 if ( op->orr_nnewSup ) pdn = *op->orr_nnewSup;
 880                 else dnParent( fc.fdn, &pdn );
 881                 build_new_dn( &newdn, &pdn, &op->orr_nnewrdn, op->o_tmpmemctx );
 882                 fc.fdn = &newdn;
 883                 freefdn = 1;
 884         }
 885         if ( op->o_tag != LDAP_REQ_ADD ) {
 886                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
 887                 rc = be_entry_get_rw( op, fc.fdn, NULL, NULL, 0, &e );
 888                 op->o_bd->bd_info = (BackendInfo *)on;
 889                 if ( rc ) return;
 890         } else {
 891                 e = op->ora_e;
 892         }
 893
 894         if ( saveit ) {
 895                 ber_dupbv_x( &opc->sdn, &e->e_name, op->o_tmpmemctx );
 896                 ber_dupbv_x( &opc->sndn, &e->e_nname, op->o_tmpmemctx );
 897                 opc->sreference = is_entry_referral( e );
 898         }
 899         if ( saveit || op->o_tag == LDAP_REQ_ADD ) {
 900                 a = attr_find( e->e_attrs, slap_schema.si_ad_entryUUID );
 901                 if ( a )
 902                         ber_dupbv_x( &opc->suuid, &a->a_nvals[0], op->o_tmpmemctx );
 903         }
 904
 905         ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
 906         for (ss = si->si_ops, sprev = (syncops *)&si->si_ops; ss;
 907                 sprev = ss, ss=snext)
 908         {
 909                 syncmatches *sm;
 910                 int found = 0;
 911
 912                 snext = ss->s_next;
 913                 /* validate base */
 914                 fc.fss = ss;
 915                 fc.fbase = 0;
 916                 fc.fscope = 0;
 917
 918                 /* If the base of the search is missing, signal a refresh */
 919                 rc = syncprov_findbase( op, &fc );
 920                 if ( rc != LDAP_SUCCESS ) {
 921                         SlapReply rs = {REP_RESULT};
 922                         send_ldap_error( ss->s_op, &rs, LDAP_SYNC_REFRESH_REQUIRED,
 923                                 "search base has changed" );
 924                         sprev->s_next = snext;
 925                         syncprov_drop_psearch( ss, 1 );
 926                         continue;
 927                 }
 928
 929                 /* If we're sending results now, look for this op in old matches */
 930                 if ( !saveit ) {
 931                         syncmatches *old;
 932                         for ( sm=opc->smatches, old=(syncmatches *)&opc->smatches; sm;
 933                                 old=sm, sm=sm->sm_next ) {
 934                                 if ( sm->sm_op == ss ) {
 935                                         found = 1;
 936                                         old->sm_next = sm->sm_next;
 937                                         op->o_tmpfree( sm, op->o_tmpmemctx );
 938                                         break;
 939                                 }
 940                         }
 941                 }
 942
 943                 /* check if current o_req_dn is in scope and matches filter */
 944                 if ( fc.fscope && test_filter( op, e, ss->s_op->ors_filter ) ==
 945                         LDAP_COMPARE_TRUE ) {
 946                         if ( saveit ) {
 947                                 sm = op->o_tmpalloc( sizeof(syncmatches), op->o_tmpmemctx );
 948                                 sm->sm_next = opc->smatches;
 949                                 sm->sm_op = ss;
 950                                 ss->s_inuse++;
 951                                 opc->smatches = sm;
 952                         } else {
 953                                 /* if found send UPDATE else send ADD */
 954                                 syncprov_sendresp( op, opc, ss, e,
 955                                         found ? LDAP_SYNC_MODIFY : LDAP_SYNC_ADD, 1 );
 956                         }
 957                 } else if ( !saveit && found ) {
 958                         /* send DELETE */
 959                         syncprov_sendresp( op, opc, ss, NULL, LDAP_SYNC_DELETE, 1 );
 960                 }
 961         }
 962         ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
 963 done:
 964         if ( op->o_tag != LDAP_REQ_ADD ) {
 965                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
 966                 be_entry_release_rw( op, e, 0 );
 967                 op->o_bd->bd_info = (BackendInfo *)on;
 968         }
 969         if ( freefdn ) {
 970                 op->o_tmpfree( fc.fdn->bv_val, op->o_tmpmemctx );
 971         }
 972 }
 973
 974 static int
 975 syncprov_op_cleanup( Operation *op, SlapReply *rs )
 976 {
 977         slap_callback *cb = op->o_callback;
 978         opcookie *opc = cb->sc_private;
 979         slap_overinst *on = opc->son;
 980         syncprov_info_t         *si = on->on_bi.bi_private;
 981         syncmatches *sm, *snext;
 982         modtarget *mt, mtdummy;
 983
 984         for (sm = opc->smatches; sm; sm=snext) {
 985                 snext = sm->sm_next;
 986                 syncprov_free_syncop( sm->sm_op );
 987                 op->o_tmpfree( sm, op->o_tmpmemctx );
 988         }
 989
 990         /* Remove op from lock table */
 991         mtdummy.mt_op = op;
 992         ldap_pvt_thread_mutex_lock( &si->si_mods_mutex );
 993         mt = avl_find( si->si_mods, &mtdummy, sp_avl_cmp );
 994         ldap_pvt_thread_mutex_unlock( &si->si_mods_mutex );
 995         if ( mt ) {
 996                 modinst *mi = mt->mt_mods;
 997
 998                 /* If there are more, promote the next one */
 999                 ldap_pvt_thread_mutex_lock( &mt->mt_mutex );
1000                 if ( mi->mi_next ) {
1001                         mt->mt_mods = mi->mi_next;
1002                         mt->mt_op = mt->mt_mods->mi_op;
1003                         ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
1004                 } else {
1005                         ldap_pvt_thread_mutex_lock( &si->si_mods_mutex );
1006                         avl_delete( &si->si_mods, mt, sp_avl_cmp );
1007                         ldap_pvt_thread_mutex_unlock( &si->si_mods_mutex );
1008                         ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
1009                         ldap_pvt_thread_mutex_destroy( &mt->mt_mutex );
1010                         ch_free( mt );
1011                 }
1012         }
1013         if ( !BER_BVISNULL( &opc->suuid ))
1014                 op->o_tmpfree( opc->suuid.bv_val, op->o_tmpmemctx );
1015         if ( !BER_BVISNULL( &opc->sndn ))
1016                 op->o_tmpfree( opc->sndn.bv_val, op->o_tmpmemctx );
1017         if ( !BER_BVISNULL( &opc->sdn ))
1018                 op->o_tmpfree( opc->sdn.bv_val, op->o_tmpmemctx );
1019         op->o_callback = cb->sc_next;
1020         op->o_tmpfree(cb, op->o_tmpmemctx);
1021
1022         return 0;
1023 }
1024
1025 static void
1026 syncprov_checkpoint( Operation *op, SlapReply *rs, slap_overinst *on )
1027 {
1028         syncprov_info_t         *si = on->on_bi.bi_private;
1029         Modifications mod;
1030         Operation opm;
1031         struct berval bv[2];
1032         slap_callback cb = {0};
1033         int manage = get_manageDSAit(op);
1034
1035         mod.sml_values = bv;
1036         bv[1].bv_val = NULL;
1037         bv[0] = si->si_ctxcsn;
1038         mod.sml_nvalues = NULL;
1039         mod.sml_desc = slap_schema.si_ad_contextCSN;
1040         mod.sml_op = LDAP_MOD_REPLACE;
1041         mod.sml_next = NULL;
1042
1043         cb.sc_response = slap_null_cb;
1044         opm = *op;
1045         opm.o_tag = LDAP_REQ_MODIFY;
1046         opm.o_callback = &cb;
1047         opm.orm_modlist = &mod;
1048         opm.o_req_dn = op->o_bd->be_suffix[0];
1049         opm.o_req_ndn = op->o_bd->be_nsuffix[0];
1050         opm.o_bd->bd_info = on->on_info->oi_orig;
1051         opm.o_managedsait = SLAP_CONTROL_NONCRITICAL;
1052         opm.o_bd->be_modify( &opm, rs );
1053         opm.o_managedsait = manage;
1054 }
1055
1056 static void
1057 syncprov_add_slog( Operation *op, struct berval *csn )
1058 {
1059         opcookie *opc = op->o_callback->sc_private;
1060         slap_overinst *on = opc->son;
1061         syncprov_info_t         *si = on->on_bi.bi_private;
1062         sessionlog *sl;
1063         slog_entry *se;
1064
1065         sl = si->si_logs;
1066         {
1067                 /* Allocate a record. UUIDs are not NUL-terminated. */
1068                 se = ch_malloc( sizeof( slog_entry ) + opc->suuid.bv_len +
1069                         csn->bv_len + 1 );
1070                 se->se_next = NULL;
1071                 se->se_tag = op->o_tag;
1072
1073                 se->se_uuid.bv_val = (char *)(se+1);
1074                 se->se_csn.bv_val = se->se_uuid.bv_val + opc->suuid.bv_len + 1;
1075                 AC_MEMCPY( se->se_uuid.bv_val, opc->suuid.bv_val, opc->suuid.bv_len );
1076                 se->se_uuid.bv_len = opc->suuid.bv_len;
1077
1078                 AC_MEMCPY( se->se_csn.bv_val, csn->bv_val, csn->bv_len );
1079                 se->se_csn.bv_val[csn->bv_len] = '\0';
1080                 se->se_csn.bv_len = csn->bv_len;
1081
1082                 ldap_pvt_thread_mutex_lock( &sl->sl_mutex );
1083                 if ( sl->sl_head ) {
1084                         sl->sl_tail->se_next = se;
1085                 } else {
1086                         sl->sl_head = se;
1087                 }
1088                 sl->sl_tail = se;
1089                 sl->sl_num++;
1090                 while ( sl->sl_num > sl->sl_size ) {
1091                         se = sl->sl_head;
1092                         sl->sl_head = se->se_next;
1093                         strcpy( sl->sl_mincsn.bv_val, se->se_csn.bv_val );
1094                         sl->sl_mincsn.bv_len = se->se_csn.bv_len;
1095                         ch_free( se );
1096                         sl->sl_num--;
1097                         if ( !sl->sl_head ) {
1098                                 sl->sl_tail = NULL;
1099                         }
1100                 }
1101                 ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
1102         }
1103 }
1104
1105 /* Just set a flag if we found the matching entry */
1106 static int
1107 playlog_cb( Operation *op, SlapReply *rs )
1108 {
1109         if ( rs->sr_type == REP_SEARCH ) {
1110                 op->o_callback->sc_private = (void *)1;
1111         }
1112         return rs->sr_err;
1113 }
1114
1115 /* enter with sl->sl_mutex locked, release before returning */
1116 static void
1117 syncprov_playlog( Operation *op, SlapReply *rs, sessionlog *sl,
1118         struct berval *oldcsn, struct berval *ctxcsn )
1119 {
1120         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
1121         syncprov_info_t         *si = on->on_bi.bi_private;
1122         slog_entry *se;
1123         int i, j, ndel, num, nmods, mmods;
1124         BerVarray uuids;
1125
1126         if ( !sl->sl_num ) {
1127                 ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
1128                 return;
1129         }
1130
1131         num = sl->sl_num;
1132         i = 0;
1133         nmods = 0;
1134
1135         uuids = op->o_tmpalloc( (num+1) * sizeof( struct berval ) +
1136                 num * UUID_LEN, op->o_tmpmemctx );
1137
1138         uuids[0].bv_val = (char *)(uuids + num + 1);
1139
1140         /* Make a copy of the relevant UUIDs. Put the Deletes up front
1141          * and everything else at the end. Do this first so we can
1142          * unlock the list mutex.
1143          */
1144         for ( se=sl->sl_head; se; se=se->se_next ) {
1145                 if ( ber_bvcmp( &se->se_csn, oldcsn ) < 0 ) continue;
1146                 if ( ber_bvcmp( &se->se_csn, ctxcsn ) > 0 ) break;
1147                 if ( se->se_tag == LDAP_REQ_DELETE ) {
1148                         j = i;
1149                         i++;
1150                 } else {
1151                         nmods++;
1152                         j = num - nmods;
1153                 }
1154                 uuids[j].bv_val = uuids[0].bv_val + (j * UUID_LEN);
1155                 AC_MEMCPY(uuids[j].bv_val, se->se_uuid.bv_val, UUID_LEN);
1156                 uuids[j].bv_len = UUID_LEN;
1157         }
1158         ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
1159
1160         ndel = i;
1161
1162         /* Zero out unused slots */
1163         for ( i=ndel; i < num - nmods; i++ )
1164                 uuids[i].bv_len = 0;
1165
1166         /* Mods must be validated to see if they belong in this delete set.
1167          */
1168
1169         mmods = nmods;
1170         /* Strip any duplicates */
1171         for ( i=0; i<nmods; i++ ) {
1172                 for ( j=0; j<ndel; j++ ) {
1173                         if ( bvmatch( &uuids[j], &uuids[num - 1 - i] )) {
1174                                 uuids[num - 1 - i].bv_len = 0;
1175                                 mmods --;
1176                                 break;
1177                         }
1178                 }
1179                 if ( uuids[num - 1 - i].bv_len == 0 ) continue;
1180                 for ( j=0; j<i; j++ ) {
1181                         if ( bvmatch( &uuids[num - 1 - j], &uuids[num - 1 - i] )) {
1182                                 uuids[num - 1 - i].bv_len = 0;
1183                                 mmods --;
1184                                 break;
1185                         }
1186                 }
1187         }
1188
1189         if ( mmods ) {
1190                 Operation fop;
1191                 SlapReply frs = { REP_RESULT };
1192                 int rc;
1193                 Filter mf, af;
1194 #ifdef LDAP_COMP_MATCH
1195                 AttributeAssertion eq = { NULL, BER_BVNULL, NULL };
1196 #else
1197                 AttributeAssertion eq;
1198 #endif
1199                 slap_callback cb = {0};
1200
1201                 fop = *op;
1202
1203                 fop.o_sync_mode = 0;
1204                 fop.o_callback = &cb;
1205                 fop.ors_limit = NULL;
1206                 fop.ors_tlimit = SLAP_NO_LIMIT;
1207                 fop.ors_attrs = slap_anlist_all_attributes;
1208                 fop.ors_attrsonly = 0;
1209                 fop.o_managedsait = SLAP_CONTROL_CRITICAL;
1210
1211                 af.f_choice = LDAP_FILTER_AND;
1212                 af.f_next = NULL;
1213                 af.f_and = &mf;
1214                 mf.f_choice = LDAP_FILTER_EQUALITY;
1215                 mf.f_ava = &eq;
1216                 mf.f_av_desc = slap_schema.si_ad_entryUUID;
1217                 mf.f_next = fop.ors_filter;
1218
1219                 fop.ors_filter = &af;
1220
1221                 cb.sc_response = playlog_cb;
1222                 fop.o_bd->bd_info = on->on_info->oi_orig;
1223
1224                 for ( i=ndel; i<num; i++ ) {
1225                         if ( uuids[i].bv_len == 0 ) continue;
1226
1227                         mf.f_av_value = uuids[i];
1228                         cb.sc_private = NULL;
1229                         fop.ors_slimit = 1;
1230                         rc = fop.o_bd->be_search( &fop, &frs );
1231
1232                         /* If entry was not found, add to delete list */
1233                         if ( !cb.sc_private ) {
1234                                 uuids[ndel++] = uuids[i];
1235                         }
1236                 }
1237                 fop.o_bd->bd_info = (BackendInfo *)on;
1238         }
1239         if ( ndel ) {
1240                 uuids[ndel].bv_val = NULL;
1241                 syncprov_sendinfo( op, rs, LDAP_TAG_SYNC_ID_SET, NULL, 0, uuids, 1 );
1242         }
1243 }
1244
1245 static int
1246 syncprov_op_response( Operation *op, SlapReply *rs )
1247 {
1248         opcookie *opc = op->o_callback->sc_private;
1249         slap_overinst *on = opc->son;
1250         syncprov_info_t         *si = on->on_bi.bi_private;
1251         syncmatches *sm;
1252
1253         if ( rs->sr_err == LDAP_SUCCESS )
1254         {
1255                 struct berval maxcsn = BER_BVNULL, curcsn = BER_BVNULL;
1256                 char cbuf[LDAP_LUTIL_CSNSTR_BUFSIZE];
1257
1258                 /* Update our context CSN */
1259                 cbuf[0] = '\0';
1260                 ldap_pvt_thread_mutex_lock( &si->si_csn_mutex );
1261                 slap_get_commit_csn( op, &maxcsn, &curcsn );
1262                 if ( !BER_BVISNULL( &maxcsn ) ) {
1263                         strcpy( cbuf, maxcsn.bv_val );
1264                         if ( ber_bvcmp( &maxcsn, &si->si_ctxcsn ) > 0 ) {
1265                                 strcpy( si->si_ctxcsnbuf, cbuf );
1266                                 si->si_ctxcsn.bv_len = maxcsn.bv_len;
1267                         }
1268                 }
1269
1270                 /* Don't do any processing for consumer contextCSN updates */
1271                 if ( SLAP_SYNC_SHADOW( op->o_bd ) &&
1272                         op->o_msgid == SLAP_SYNC_UPDATE_MSGID ) {
1273                         ldap_pvt_thread_mutex_unlock( &si->si_csn_mutex );
1274                         return SLAP_CB_CONTINUE;
1275                 }
1276
1277                 si->si_numops++;
1278                 if ( si->si_chkops || si->si_chktime ) {
1279                         int do_check=0;
1280                         if ( si->si_chkops && si->si_numops >= si->si_chkops ) {
1281                                 do_check = 1;
1282                                 si->si_numops = 0;
1283                         }
1284                         if ( si->si_chktime &&
1285                                 (op->o_time - si->si_chklast >= si->si_chktime )) {
1286                                 do_check = 1;
1287                                 si->si_chklast = op->o_time;
1288                         }
1289                         if ( do_check ) {
1290                                 syncprov_checkpoint( op, rs, on );
1291                         }
1292                 }
1293                 ldap_pvt_thread_mutex_unlock( &si->si_csn_mutex );
1294
1295                 opc->sctxcsn.bv_len = maxcsn.bv_len;
1296                 opc->sctxcsn.bv_val = cbuf;
1297
1298                 /* Handle any persistent searches */
1299                 if ( si->si_ops ) {
1300                         switch(op->o_tag) {
1301                         case LDAP_REQ_ADD:
1302                         case LDAP_REQ_MODIFY:
1303                         case LDAP_REQ_MODRDN:
1304                         case LDAP_REQ_EXTENDED:
1305                                 syncprov_matchops( op, opc, 0 );
1306                                 break;
1307                         case LDAP_REQ_DELETE:
1308                                 /* for each match in opc->smatches:
1309                                  *   send DELETE msg
1310                                  */
1311                                 ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
1312                                 for ( sm = opc->smatches; sm; sm=sm->sm_next ) {
1313                                         if ( sm->sm_op->s_op->o_abandon )
1314                                                 continue;
1315                                         syncprov_sendresp( op, opc, sm->sm_op, NULL,
1316                                                 LDAP_SYNC_DELETE, 1 );
1317                                 }
1318                                 ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
1319                                 break;
1320                         }
1321                 }
1322
1323                 /* Add any log records */
1324                 if ( si->si_logs && op->o_tag != LDAP_REQ_ADD ) {
1325                         syncprov_add_slog( op, &curcsn );
1326                 }
1327
1328         }
1329         return SLAP_CB_CONTINUE;
1330 }
1331
1332 /* We don't use a subentry to store the context CSN any more.
1333  * We expose the current context CSN as an operational attribute
1334  * of the suffix entry.
1335  */
1336 static int
1337 syncprov_op_compare( Operation *op, SlapReply *rs )
1338 {
1339         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
1340         syncprov_info_t         *si = on->on_bi.bi_private;
1341         int rc = SLAP_CB_CONTINUE;
1342
1343         if ( dn_match( &op->o_req_ndn, op->o_bd->be_nsuffix ) &&
1344                 op->oq_compare.rs_ava->aa_desc == slap_schema.si_ad_contextCSN )
1345         {
1346                 Entry e = {0};
1347                 Attribute a = {0};
1348                 struct berval bv[2];
1349
1350                 e.e_name = op->o_bd->be_suffix[0];
1351                 e.e_nname = op->o_bd->be_nsuffix[0];
1352
1353                 BER_BVZERO( &bv[1] );
1354                 bv[0] = si->si_ctxcsn;
1355
1356                 a.a_desc = slap_schema.si_ad_contextCSN;
1357                 a.a_vals = bv;
1358                 a.a_nvals = a.a_vals;
1359
1360                 ldap_pvt_thread_mutex_lock( &si->si_csn_mutex );
1361
1362                 rs->sr_err = access_allowed( op, &e, op->oq_compare.rs_ava->aa_desc,
1363                         &op->oq_compare.rs_ava->aa_value, ACL_COMPARE, NULL );
1364                 if ( ! rs->sr_err ) {
1365                         rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
1366                         goto return_results;
1367                 }
1368
1369                 if ( get_assert( op ) &&
1370                         ( test_filter( op, &e, get_assertion( op ) ) != LDAP_COMPARE_TRUE ) )
1371                 {
1372                         rs->sr_err = LDAP_ASSERTION_FAILED;
1373                         goto return_results;
1374                 }
1375
1376
1377                 rs->sr_err = LDAP_COMPARE_FALSE;
1378
1379                 if ( value_find_ex( op->oq_compare.rs_ava->aa_desc,
1380                         SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
1381                                 SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
1382                                 a.a_nvals, &op->oq_compare.rs_ava->aa_value, op->o_tmpmemctx ) == 0 )
1383                 {
1384                         rs->sr_err = LDAP_COMPARE_TRUE;
1385                 }
1386
1387 return_results:;
1388
1389                 ldap_pvt_thread_mutex_unlock( &si->si_csn_mutex );
1390
1391                 send_ldap_result( op, rs );
1392
1393                 if( rs->sr_err == LDAP_COMPARE_FALSE || rs->sr_err == LDAP_COMPARE_TRUE ) {
1394                         rs->sr_err = LDAP_SUCCESS;
1395                 }
1396                 rc = rs->sr_err;
1397         }
1398
1399         return rc;
1400 }
1401
1402 static int
1403 syncprov_op_mod( Operation *op, SlapReply *rs )
1404 {
1405         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
1406         syncprov_info_t         *si = on->on_bi.bi_private;
1407
1408         slap_callback *cb = op->o_tmpcalloc(1, sizeof(slap_callback)+
1409                 sizeof(opcookie) +
1410                 (si->si_ops ? sizeof(modinst) : 0 ),
1411                 op->o_tmpmemctx);
1412         opcookie *opc = (opcookie *)(cb+1);
1413         opc->son = on;
1414         cb->sc_response = syncprov_op_response;
1415         cb->sc_cleanup = syncprov_op_cleanup;
1416         cb->sc_private = opc;
1417         cb->sc_next = op->o_callback;
1418         op->o_callback = cb;
1419
1420         /* If there are active persistent searches, lock this operation.
1421          * See seqmod.c for the locking logic on its own.
1422          */
1423         if ( si->si_ops ) {
1424                 modtarget *mt, mtdummy;
1425                 modinst *mi;
1426
1427                 mi = (modinst *)(opc+1);
1428                 mi->mi_op = op;
1429
1430                 /* See if we're already modifying this entry... */
1431                 mtdummy.mt_op = op;
1432                 ldap_pvt_thread_mutex_lock( &si->si_mods_mutex );
1433                 mt = avl_find( si->si_mods, &mtdummy, sp_avl_cmp );
1434                 if ( mt ) {
1435                         ldap_pvt_thread_mutex_lock( &mt->mt_mutex );
1436                         ldap_pvt_thread_mutex_unlock( &si->si_mods_mutex );
1437                         mt->mt_tail->mi_next = mi;
1438                         mt->mt_tail = mi;
1439                         /* wait for this op to get to head of list */
1440                         while ( mt->mt_mods != mi ) {
1441                                 ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
1442                                 ldap_pvt_thread_yield();
1443                                 ldap_pvt_thread_mutex_lock( &mt->mt_mutex );
1444
1445                                 /* clean up if the caller is giving up */
1446                                 if ( op->o_abandon ) {
1447                                         modinst *m2;
1448                                         for ( m2 = mt->mt_mods; m2->mi_next != mi;
1449                                                 m2 = m2->mi_next );
1450                                         m2->mi_next = mi->mi_next;
1451                                         if ( mt->mt_tail == mi ) mt->mt_tail = m2;
1452                                         op->o_tmpfree( cb, op->o_tmpmemctx );
1453                                         ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
1454                                         return SLAPD_ABANDON;
1455                                 }
1456                         }
1457                         ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
1458                 } else {
1459                         /* Record that we're modifying this entry now */
1460                         mt = ch_malloc( sizeof(modtarget) );
1461                         mt->mt_mods = mi;
1462                         mt->mt_tail = mi;
1463                         mt->mt_op = mi->mi_op;
1464                         ldap_pvt_thread_mutex_init( &mt->mt_mutex );
1465                         avl_insert( &si->si_mods, mt, sp_avl_cmp, avl_dup_error );
1466                         ldap_pvt_thread_mutex_unlock( &si->si_mods_mutex );
1467                 }
1468         }
1469
1470         if (( si->si_ops || si->si_logs ) && op->o_tag != LDAP_REQ_ADD )
1471                 syncprov_matchops( op, opc, 1 );
1472
1473
1474         return SLAP_CB_CONTINUE;
1475 }
1476
1477 static int
1478 syncprov_op_extended( Operation *op, SlapReply *rs )
1479 {
1480         if ( exop_is_write( op ))
1481                 return syncprov_op_mod( op, rs );
1482
1483         return SLAP_CB_CONTINUE;
1484 }
1485
1486 typedef struct searchstate {
1487         slap_overinst *ss_on;
1488         syncops *ss_so;
1489         int ss_present;
1490 } searchstate;
1491
1492 static int
1493 syncprov_search_cleanup( Operation *op, SlapReply *rs )
1494 {
1495         if ( rs->sr_ctrls ) {
1496                 op->o_tmpfree( rs->sr_ctrls[0], op->o_tmpmemctx );
1497                 op->o_tmpfree( rs->sr_ctrls, op->o_tmpmemctx );
1498                 rs->sr_ctrls = NULL;
1499         }
1500         return 0;
1501 }
1502
1503 static void
1504 syncprov_detach_op( Operation *op, syncops *so )
1505 {
1506         Operation *op2;
1507         int i, alen = 0;
1508         size_t size;
1509         char *ptr;
1510         GroupAssertion *g1, *g2;
1511
1512         /* count the search attrs */
1513         for (i=0; op->ors_attrs && !BER_BVISNULL( &op->ors_attrs[i].an_name ); i++) {
1514                 alen += op->ors_attrs[i].an_name.bv_len + 1;
1515         }
1516         /* Make a new copy of the operation */
1517         size = sizeof(Operation) + sizeof(Opheader) +
1518                 (i ? ( (i+1) * sizeof(AttributeName) + alen) : 0) +
1519                 op->o_req_dn.bv_len + 1 +
1520                 op->o_req_ndn.bv_len + 1 +
1521                 op->o_ndn.bv_len + 1 +
1522                 so->s_filterstr.bv_len + 1;
1523         op2 = (Operation *)ch_calloc( 1, size );
1524         op2->o_hdr = (Opheader *)(op2+1);
1525
1526         /* Copy the fields we care about explicitly, leave the rest alone */
1527         *op2->o_hdr = *op->o_hdr;
1528         op2->o_tag = op->o_tag;
1529         op2->o_time = op->o_time;
1530         op2->o_bd = op->o_bd;
1531         op2->o_request = op->o_request;
1532
1533         if ( i ) {
1534                 op2->ors_attrs = (AttributeName *)(op2->o_hdr + 1);
1535                 ptr = (char *)(op2->ors_attrs+i+1);
1536                 for (i=0; !BER_BVISNULL( &op->ors_attrs[i].an_name ); i++) {
1537                         op2->ors_attrs[i] = op->ors_attrs[i];
1538                         op2->ors_attrs[i].an_name.bv_val = ptr;
1539                         ptr = lutil_strcopy( ptr, op->ors_attrs[i].an_name.bv_val ) + 1;
1540                 }
1541                 BER_BVZERO( &op2->ors_attrs[i].an_name );
1542         } else {
1543                 ptr = (char *)(op2->o_hdr + 1);
1544         }
1545         op2->o_authz = op->o_authz;
1546         op2->o_ndn.bv_val = ptr;
1547         ptr = lutil_strcopy(ptr, op->o_ndn.bv_val) + 1;
1548         op2->o_dn = op2->o_ndn;
1549         op2->o_req_dn.bv_len = op->o_req_dn.bv_len;
1550         op2->o_req_dn.bv_val = ptr;
1551         ptr = lutil_strcopy(ptr, op->o_req_dn.bv_val) + 1;
1552         op2->o_req_ndn.bv_len = op->o_req_ndn.bv_len;
1553         op2->o_req_ndn.bv_val = ptr;
1554         ptr = lutil_strcopy(ptr, op->o_req_ndn.bv_val) + 1;
1555         op2->ors_filterstr.bv_val = ptr;
1556         strcpy( ptr, so->s_filterstr.bv_val );
1557         op2->ors_filterstr.bv_len = so->s_filterstr.bv_len;
1558         op2->ors_filter = str2filter( ptr );
1559         so->s_op = op2;
1560
1561         /* Copy any cached group ACLs individually */
1562         op2->o_groups = NULL;
1563         for ( g1=op->o_groups; g1; g1=g1->ga_next ) {
1564                 g2 = ch_malloc( sizeof(GroupAssertion) + g1->ga_len );
1565                 *g2 = *g1;
1566                 strcpy( g2->ga_ndn, g1->ga_ndn );
1567                 g2->ga_next = op2->o_groups;
1568                 op2->o_groups = g2;
1569         }
1570
1571         /* Add op2 to conn so abandon will find us */
1572         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1573         op->o_conn->c_n_ops_executing++;
1574         op->o_conn->c_n_ops_completed--;
1575         LDAP_STAILQ_INSERT_TAIL( &op->o_conn->c_ops, op2, o_next );
1576         so->s_flags |= PS_IS_DETACHED;
1577         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1578 }
1579
1580 static int
1581 syncprov_search_response( Operation *op, SlapReply *rs )
1582 {
1583         searchstate *ss = op->o_callback->sc_private;
1584         slap_overinst *on = ss->ss_on;
1585         syncprov_info_t         *si = on->on_bi.bi_private;
1586         sync_control *srs = op->o_controls[slap_cids.sc_LDAPsync];
1587
1588         if ( rs->sr_type == REP_SEARCH || rs->sr_type == REP_SEARCHREF ) {
1589                 int i;
1590                 /* If we got a referral without a referral object, there's
1591                  * something missing that we cannot replicate. Just ignore it.
1592                  * The consumer will abort because we didn't send the expected
1593                  * control.
1594                  */
1595                 if ( !rs->sr_entry ) {
1596                         assert( rs->sr_entry );
1597                         Debug( LDAP_DEBUG_ANY, "bogus referral in context\n",0,0,0 );
1598                         return SLAP_CB_CONTINUE;
1599                 }
1600                 if ( !BER_BVISNULL( &srs->sr_state.ctxcsn )) {
1601                         Attribute *a = attr_find( rs->sr_entry->e_attrs,
1602                                 slap_schema.si_ad_entryCSN );
1603
1604                         /* Don't send the ctx entry twice */
1605                         if ( a && bvmatch( &a->a_nvals[0], &srs->sr_state.ctxcsn ) )
1606                                 return LDAP_SUCCESS;
1607                 }
1608                 rs->sr_ctrls = op->o_tmpalloc( sizeof(LDAPControl *)*2,
1609                         op->o_tmpmemctx );
1610                 rs->sr_ctrls[1] = NULL;
1611                 rs->sr_err = syncprov_state_ctrl( op, rs, rs->sr_entry,
1612                         LDAP_SYNC_ADD, rs->sr_ctrls, 0, 0, NULL );
1613         } else if ( rs->sr_type == REP_RESULT && rs->sr_err == LDAP_SUCCESS ) {
1614                 struct berval cookie;
1615
1616                 slap_compose_sync_cookie( op, &cookie,
1617                         &op->ors_filter->f_and->f_ava->aa_value,
1618                         srs->sr_state.rid );
1619
1620                 /* Is this a regular refresh? */
1621                 if ( !ss->ss_so ) {
1622                         rs->sr_ctrls = op->o_tmpalloc( sizeof(LDAPControl *)*2,
1623                                 op->o_tmpmemctx );
1624                         rs->sr_ctrls[1] = NULL;
1625                         rs->sr_err = syncprov_done_ctrl( op, rs, rs->sr_ctrls,
1626                                 0, 1, &cookie, ss->ss_present ?  LDAP_SYNC_REFRESH_PRESENTS :
1627                                         LDAP_SYNC_REFRESH_DELETES );
1628                 } else {
1629                         int locked = 0;
1630                 /* It's RefreshAndPersist, transition to Persist phase */
1631                         syncprov_sendinfo( op, rs, ( ss->ss_present && rs->sr_nentries ) ?
1632                                 LDAP_TAG_SYNC_REFRESH_PRESENT : LDAP_TAG_SYNC_REFRESH_DELETE,
1633                                 &cookie, 1, NULL, 0 );
1634                         /* Flush any queued persist messages */
1635                         if ( ss->ss_so->s_res ) {
1636                                 syncres *sr, *srnext;
1637                                 Entry *e;
1638                                 opcookie opc;
1639
1640                                 opc.son = on;
1641                                 ldap_pvt_thread_mutex_lock( &ss->ss_so->s_mutex );
1642                                 locked = 1;
1643                                 for (sr = ss->ss_so->s_res; sr; sr=srnext) {
1644                                         int rc = LDAP_SUCCESS;
1645                                         srnext = sr->s_next;
1646                                         opc.sdn = sr->s_dn;
1647                                         opc.sndn = sr->s_ndn;
1648                                         opc.suuid = sr->s_uuid;
1649                                         opc.sctxcsn = sr->s_csn;
1650                                         opc.sreference = sr->s_isreference;
1651                                         e = NULL;
1652
1653                                         if ( sr->s_mode != LDAP_SYNC_DELETE ) {
1654                                                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
1655                                                 rc = be_entry_get_rw( op, &opc.sndn, NULL, NULL, 0, &e );
1656                                                 op->o_bd->bd_info = (BackendInfo *)on;
1657                                         }
1658                                         if ( rc == LDAP_SUCCESS )
1659                                                 syncprov_sendresp( op, &opc, ss->ss_so, e,
1660                                                         sr->s_mode, 0 );
1661
1662                                         if ( e ) {
1663                                                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
1664                                                 be_entry_release_rw( op, e, 0 );
1665                                                 op->o_bd->bd_info = (BackendInfo *)on;
1666                                         }
1667                                         ch_free( sr );
1668                                 }
1669                                 ss->ss_so->s_res = NULL;
1670                                 ss->ss_so->s_restail = NULL;
1671                         }
1672
1673                         /* Turn off the refreshing flag */
1674                         ss->ss_so->s_flags ^= PS_IS_REFRESHING;
1675                         if ( locked )
1676                                 ldap_pvt_thread_mutex_unlock( &ss->ss_so->s_mutex );
1677
1678                         /* Detach this Op from frontend control */
1679                         syncprov_detach_op( op, ss->ss_so );
1680
1681                         return LDAP_SUCCESS;
1682                 }
1683         }
1684
1685         return SLAP_CB_CONTINUE;
1686 }
1687
1688 static int
1689 syncprov_op_search( Operation *op, SlapReply *rs )
1690 {
1691         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
1692         syncprov_info_t         *si = (syncprov_info_t *)on->on_bi.bi_private;
1693         slap_callback   *cb;
1694         int gotstate = 0, nochange = 0, do_present = 1;
1695         Filter *fand, *fava;
1696         syncops *sop = NULL;
1697         searchstate *ss;
1698         sync_control *srs;
1699         struct berval ctxcsn;
1700         char csnbuf[LDAP_LUTIL_CSNSTR_BUFSIZE];
1701
1702         if ( !(op->o_sync_mode & SLAP_SYNC_REFRESH) ) return SLAP_CB_CONTINUE;
1703
1704         if ( op->ors_deref & LDAP_DEREF_SEARCHING ) {
1705                 send_ldap_error( op, rs, LDAP_PROTOCOL_ERROR, "illegal value for derefAliases" );
1706                 return rs->sr_err;
1707         }
1708
1709         srs = op->o_controls[slap_cids.sc_LDAPsync];
1710         op->o_managedsait = SLAP_CONTROL_NONCRITICAL;
1711
1712         /* If this is a persistent search, set it up right away */
1713         if ( op->o_sync_mode & SLAP_SYNC_PERSIST ) {
1714                 syncops so = {0};
1715                 fbase_cookie fc;
1716                 opcookie opc;
1717                 slap_callback sc;
1718
1719                 fc.fss = &so;
1720                 fc.fbase = 0;
1721                 so.s_eid = NOID;
1722                 so.s_op = op;
1723                 so.s_flags = PS_IS_REFRESHING;
1724                 /* syncprov_findbase expects to be called as a callback... */
1725                 sc.sc_private = &opc;
1726                 opc.son = on;
1727                 cb = op->o_callback;
1728                 op->o_callback = &sc;
1729                 rs->sr_err = syncprov_findbase( op, &fc );
1730                 op->o_callback = cb;
1731
1732                 if ( rs->sr_err != LDAP_SUCCESS ) {
1733                         send_ldap_result( op, rs );
1734                         return rs->sr_err;
1735                 }
1736                 sop = ch_malloc( sizeof( syncops ));
1737                 *sop = so;
1738                 ldap_pvt_thread_mutex_init( &sop->s_mutex );
1739                 sop->s_rid = srs->sr_state.rid;
1740                 sop->s_inuse = 1;
1741
1742                 ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
1743                 sop->s_next = si->si_ops;
1744                 si->si_ops = sop;
1745                 ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
1746         }
1747
1748         /* snapshot the ctxcsn */
1749         ldap_pvt_thread_mutex_lock( &si->si_csn_mutex );
1750         strcpy( csnbuf, si->si_ctxcsnbuf );
1751         ctxcsn.bv_len = si->si_ctxcsn.bv_len;
1752         ldap_pvt_thread_mutex_unlock( &si->si_csn_mutex );
1753         ctxcsn.bv_val = csnbuf;
1754
1755         /* If we have a cookie, handle the PRESENT lookups */
1756         if ( !BER_BVISNULL( &srs->sr_state.ctxcsn )) {
1757                 sessionlog *sl;
1758
1759                 /* The cookie was validated when it was parsed, just use it */
1760
1761                 /* If just Refreshing and nothing has changed, shortcut it */
1762                 if ( bvmatch( &srs->sr_state.ctxcsn, &ctxcsn )) {
1763                         nochange = 1;
1764                         if ( !(op->o_sync_mode & SLAP_SYNC_PERSIST) ) {
1765                                 LDAPControl     *ctrls[2];
1766
1767                                 ctrls[0] = NULL;
1768                                 ctrls[1] = NULL;
1769                                 syncprov_done_ctrl( op, rs, ctrls, 0, 0,
1770                                         NULL, LDAP_SYNC_REFRESH_DELETES );
1771                                 rs->sr_ctrls = ctrls;
1772                                 rs->sr_err = LDAP_SUCCESS;
1773                                 send_ldap_result( op, rs );
1774                                 rs->sr_ctrls = NULL;
1775                                 return rs->sr_err;
1776                         }
1777                         goto shortcut;
1778                 }
1779                 /* Do we have a sessionlog for this search? */
1780                 sl=si->si_logs;
1781                 if ( sl ) {
1782                         ldap_pvt_thread_mutex_lock( &sl->sl_mutex );
1783                         if ( ber_bvcmp( &srs->sr_state.ctxcsn, &sl->sl_mincsn ) >= 0 ) {
1784                                 do_present = 0;
1785                                 /* mutex is unlocked in playlog */
1786                                 syncprov_playlog( op, rs, sl, &srs->sr_state.ctxcsn, &ctxcsn );
1787                         } else {
1788                                 ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
1789                         }
1790                 }
1791                 /* Is the CSN still present in the database? */
1792                 if ( syncprov_findcsn( op, FIND_CSN ) != LDAP_SUCCESS ) {
1793                         /* No, so a reload is required */
1794 #if 0           /* the consumer doesn't seem to send this hint */
1795                         if ( op->o_sync_rhint == 0 ) {
1796                                 send_ldap_error( op, rs, LDAP_SYNC_REFRESH_REQUIRED, "sync cookie is stale" );
1797                                 return rs->sr_err;
1798                         }
1799 #endif
1800                 } else {
1801                         gotstate = 1;
1802                         /* If changed and doing Present lookup, send Present UUIDs */
1803                         if ( do_present && syncprov_findcsn( op, FIND_PRESENT ) !=
1804                                 LDAP_SUCCESS ) {
1805                                 send_ldap_result( op, rs );
1806                                 return rs->sr_err;
1807                         }
1808                 }
1809         }
1810
1811 shortcut:
1812         /* Append CSN range to search filter, save original filter
1813          * for persistent search evaluation
1814          */
1815         if ( sop ) {
1816                 sop->s_filterstr= op->ors_filterstr;
1817         }
1818
1819         fand = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
1820         fand->f_choice = LDAP_FILTER_AND;
1821         fand->f_next = NULL;
1822         fava = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
1823         fava->f_choice = LDAP_FILTER_LE;
1824         fava->f_ava = op->o_tmpalloc( sizeof(AttributeAssertion), op->o_tmpmemctx );
1825         fava->f_ava->aa_desc = slap_schema.si_ad_entryCSN;
1826 #ifdef LDAP_COMP_MATCH
1827         fava->f_ava->aa_cf = NULL;
1828 #endif
1829         ber_dupbv_x( &fava->f_ava->aa_value, &ctxcsn, op->o_tmpmemctx );
1830         fand->f_and = fava;
1831         if ( gotstate ) {
1832                 fava->f_next = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
1833                 fava = fava->f_next;
1834                 fava->f_choice = LDAP_FILTER_GE;
1835                 fava->f_ava = op->o_tmpalloc( sizeof(AttributeAssertion), op->o_tmpmemctx );
1836                 fava->f_ava->aa_desc = slap_schema.si_ad_entryCSN;
1837 #ifdef LDAP_COMP_MATCH
1838                 fava->f_ava->aa_cf = NULL;
1839 #endif
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         if ( slapMode & SLAP_TOOL_MODE ) {
2008                 return 0;
2009         }
2010
2011         rc = overlay_register_control( be, LDAP_CONTROL_SYNC );
2012         if ( rc ) {
2013                 return rc;
2014         }
2015
2016         connection_fake_init( &conn, op, thrctx );
2017         op->o_bd = be;
2018         op->o_dn = be->be_rootdn;
2019         op->o_ndn = be->be_rootndn;
2020
2021         ctxcsnbuf[0] = '\0';
2022
2023         op->o_bd->bd_info = on->on_info->oi_orig;
2024         rc = be_entry_get_rw( op, be->be_nsuffix, NULL,
2025                 slap_schema.si_ad_contextCSN, 0, &e );
2026
2027         if ( e ) {
2028                 a = attr_find( e->e_attrs, slap_schema.si_ad_contextCSN );
2029                 if ( a ) {
2030                         si->si_ctxcsn.bv_len = a->a_nvals[0].bv_len;
2031                         if ( si->si_ctxcsn.bv_len >= sizeof(si->si_ctxcsnbuf ))
2032                                 si->si_ctxcsn.bv_len = sizeof(si->si_ctxcsnbuf)-1;
2033                         strncpy( si->si_ctxcsnbuf, a->a_nvals[0].bv_val,
2034                                 si->si_ctxcsn.bv_len );
2035                         si->si_ctxcsnbuf[si->si_ctxcsn.bv_len] = '\0';
2036                         strcpy( ctxcsnbuf, si->si_ctxcsnbuf );
2037                 }
2038                 be_entry_release_rw( op, e, 0 );
2039                 op->o_bd->bd_info = (BackendInfo *)on;
2040                 op->o_req_dn = be->be_suffix[0];
2041                 op->o_req_ndn = be->be_nsuffix[0];
2042                 op->ors_scope = LDAP_SCOPE_SUBTREE;
2043                 syncprov_findcsn( op, FIND_MAXCSN );
2044         } else if ( SLAP_SYNC_SHADOW( op->o_bd )) {
2045                 /* If we're also a consumer, and we didn't find the context entry,
2046                  * then don't generate anything, wait for our provider to send it
2047                  * to us.
2048                  */
2049                 goto out;
2050         }
2051
2052         if ( BER_BVISEMPTY( &si->si_ctxcsn ) ) {
2053                 slap_get_csn( op, si->si_ctxcsnbuf, sizeof(si->si_ctxcsnbuf),
2054                                 &si->si_ctxcsn, 0 );
2055         }
2056
2057         /* If our ctxcsn is different from what was read from the root
2058          * entry, write the new value out.
2059          */
2060         if ( strcmp( si->si_ctxcsnbuf, ctxcsnbuf )) {
2061                 SlapReply rs = {REP_RESULT};
2062                 syncprov_checkpoint( op, &rs, on );
2063         }
2064
2065 out:
2066         op->o_bd->bd_info = (BackendInfo *)on;
2067         return 0;
2068 }
2069
2070 /* Write the current contextCSN into the underlying db.
2071  */
2072 static int
2073 syncprov_db_close(
2074     BackendDB *be
2075 )
2076 {
2077     slap_overinst   *on = (slap_overinst *) be->bd_info;
2078     syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
2079         int i;
2080
2081         if ( slapMode & SLAP_TOOL_MODE ) {
2082                 return 0;
2083         }
2084         if ( si->si_numops ) {
2085                 Connection conn;
2086                 char opbuf[OPERATION_BUFFER_SIZE];
2087                 Operation *op = (Operation *)opbuf;
2088                 SlapReply rs = {REP_RESULT};
2089
2090                 connection_fake_init( &conn, op, thrctx );
2091                 op->o_bd = be;
2092                 op->o_dn = be->be_rootdn;
2093                 op->o_ndn = be->be_rootndn;
2094                 syncprov_checkpoint( op, &rs, on );
2095         }
2096         for ( i=0; thrctx[i].key; i++) {
2097                 if ( thrctx[i].xfree )
2098                         thrctx[i].xfree( thrctx[i].key, thrctx[i].data );
2099                 thrctx[i].key = NULL;
2100         }
2101
2102     return 0;
2103 }
2104
2105 static int
2106 syncprov_db_init(
2107         BackendDB *be
2108 )
2109 {
2110         slap_overinst   *on = (slap_overinst *)be->bd_info;
2111         syncprov_info_t *si;
2112
2113         si = ch_calloc(1, sizeof(syncprov_info_t));
2114         on->on_bi.bi_private = si;
2115         ldap_pvt_thread_mutex_init( &si->si_csn_mutex );
2116         ldap_pvt_thread_mutex_init( &si->si_ops_mutex );
2117         ldap_pvt_thread_mutex_init( &si->si_mods_mutex );
2118         si->si_ctxcsn.bv_val = si->si_ctxcsnbuf;
2119
2120         csn_anlist[0].an_desc = slap_schema.si_ad_entryCSN;
2121         csn_anlist[0].an_name = slap_schema.si_ad_entryCSN->ad_cname;
2122
2123         uuid_anlist[0].an_desc = slap_schema.si_ad_entryUUID;
2124         uuid_anlist[0].an_name = slap_schema.si_ad_entryUUID->ad_cname;
2125
2126         return 0;
2127 }
2128
2129 static int
2130 syncprov_db_destroy(
2131         BackendDB *be
2132 )
2133 {
2134         slap_overinst   *on = (slap_overinst *)be->bd_info;
2135         syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
2136
2137         if ( si ) {
2138                 ldap_pvt_thread_mutex_destroy( &si->si_mods_mutex );
2139                 ldap_pvt_thread_mutex_destroy( &si->si_ops_mutex );
2140                 ldap_pvt_thread_mutex_destroy( &si->si_csn_mutex );
2141                 ch_free( si );
2142         }
2143
2144         return 0;
2145 }
2146
2147 static int syncprov_parseCtrl (
2148         Operation *op,
2149         SlapReply *rs,
2150         LDAPControl *ctrl )
2151 {
2152         ber_tag_t tag;
2153         BerElement *ber;
2154         ber_int_t mode;
2155         ber_len_t len;
2156         struct berval cookie = BER_BVNULL;
2157         sync_control *sr;
2158         int rhint = 0;
2159
2160         if ( op->o_sync != SLAP_CONTROL_NONE ) {
2161                 rs->sr_text = "Sync control specified multiple times";
2162                 return LDAP_PROTOCOL_ERROR;
2163         }
2164
2165         if ( op->o_pagedresults != SLAP_CONTROL_NONE ) {
2166                 rs->sr_text = "Sync control specified with pagedResults control";
2167                 return LDAP_PROTOCOL_ERROR;
2168         }
2169
2170         if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
2171                 rs->sr_text = "Sync control value is empty (or absent)";
2172                 return LDAP_PROTOCOL_ERROR;
2173         }
2174
2175         /* Parse the control value
2176          *      syncRequestValue ::= SEQUENCE {
2177          *              mode   ENUMERATED {
2178          *                      -- 0 unused
2179          *                      refreshOnly             (1),
2180          *                      -- 2 reserved
2181          *                      refreshAndPersist       (3)
2182          *              },
2183          *              cookie  syncCookie OPTIONAL
2184          *      }
2185          */
2186
2187         ber = ber_init( &ctrl->ldctl_value );
2188         if( ber == NULL ) {
2189                 rs->sr_text = "internal error";
2190                 return LDAP_OTHER;
2191         }
2192
2193         if ( (tag = ber_scanf( ber, "{i" /*}*/, &mode )) == LBER_ERROR ) {
2194                 rs->sr_text = "Sync control : mode decoding error";
2195                 return LDAP_PROTOCOL_ERROR;
2196         }
2197
2198         switch( mode ) {
2199         case LDAP_SYNC_REFRESH_ONLY:
2200                 mode = SLAP_SYNC_REFRESH;
2201                 break;
2202         case LDAP_SYNC_REFRESH_AND_PERSIST:
2203                 mode = SLAP_SYNC_REFRESH_AND_PERSIST;
2204                 break;
2205         default:
2206                 rs->sr_text = "Sync control : unknown update mode";
2207                 return LDAP_PROTOCOL_ERROR;
2208         }
2209
2210         tag = ber_peek_tag( ber, &len );
2211
2212         if ( tag == LDAP_TAG_SYNC_COOKIE ) {
2213                 if (( ber_scanf( ber, /*{*/ "o", &cookie )) == LBER_ERROR ) {
2214                         rs->sr_text = "Sync control : cookie decoding error";
2215                         return LDAP_PROTOCOL_ERROR;
2216                 }
2217         }
2218         if ( tag == LDAP_TAG_RELOAD_HINT ) {
2219                 if (( ber_scanf( ber, /*{*/ "b", &rhint )) == LBER_ERROR ) {
2220                         rs->sr_text = "Sync control : rhint decoding error";
2221                         return LDAP_PROTOCOL_ERROR;
2222                 }
2223         }
2224         if (( ber_scanf( ber, /*{*/ "}")) == LBER_ERROR ) {
2225                         rs->sr_text = "Sync control : decoding error";
2226                         return LDAP_PROTOCOL_ERROR;
2227         }
2228         sr = op->o_tmpcalloc( 1, sizeof(struct sync_control), op->o_tmpmemctx );
2229         sr->sr_rhint = rhint;
2230         if (!BER_BVISNULL(&cookie)) {
2231                 ber_dupbv( &sr->sr_state.octet_str, &cookie );
2232                 slap_parse_sync_cookie( &sr->sr_state );
2233         }
2234
2235         op->o_controls[slap_cids.sc_LDAPsync] = sr;
2236
2237         (void) ber_free( ber, 1 );
2238
2239         op->o_sync = ctrl->ldctl_iscritical
2240                 ? SLAP_CONTROL_CRITICAL
2241                 : SLAP_CONTROL_NONCRITICAL;
2242
2243         op->o_sync_mode |= mode;        /* o_sync_mode shares o_sync */
2244
2245         return LDAP_SUCCESS;
2246 }
2247
2248 /* This overlay is set up for dynamic loading via moduleload. For static
2249  * configuration, you'll need to arrange for the slap_overinst to be
2250  * initialized and registered by some other function inside slapd.
2251  */
2252
2253 static slap_overinst            syncprov;
2254
2255 int
2256 syncprov_init()
2257 {
2258         int rc;
2259
2260         rc = register_supported_control( LDAP_CONTROL_SYNC,
2261                 SLAP_CTRL_HIDE|SLAP_CTRL_SEARCH, NULL,
2262                 syncprov_parseCtrl, &slap_cids.sc_LDAPsync );
2263         if ( rc != LDAP_SUCCESS ) {
2264                 fprintf( stderr, "Failed to register control %d\n", rc );
2265                 return rc;
2266         }
2267
2268         syncprov.on_bi.bi_type = "syncprov";
2269         syncprov.on_bi.bi_db_init = syncprov_db_init;
2270         syncprov.on_bi.bi_db_config = syncprov_db_config;
2271         syncprov.on_bi.bi_db_destroy = syncprov_db_destroy;
2272         syncprov.on_bi.bi_db_open = syncprov_db_open;
2273         syncprov.on_bi.bi_db_close = syncprov_db_close;
2274
2275         syncprov.on_bi.bi_op_abandon = syncprov_op_abandon;
2276         syncprov.on_bi.bi_op_cancel = syncprov_op_abandon;
2277
2278         syncprov.on_bi.bi_op_add = syncprov_op_mod;
2279         syncprov.on_bi.bi_op_compare = syncprov_op_compare;
2280         syncprov.on_bi.bi_op_delete = syncprov_op_mod;
2281         syncprov.on_bi.bi_op_modify = syncprov_op_mod;
2282         syncprov.on_bi.bi_op_modrdn = syncprov_op_mod;
2283         syncprov.on_bi.bi_op_search = syncprov_op_search;
2284         syncprov.on_bi.bi_extended = syncprov_op_extended;
2285         syncprov.on_bi.bi_operational = syncprov_operational;
2286
2287         return overlay_register( &syncprov );
2288 }
2289
2290 #if SLAPD_OVER_SYNCPROV == SLAPD_MOD_DYNAMIC
2291 int
2292 init_module( int argc, char *argv[] )
2293 {
2294         return syncprov_init();
2295 }
2296 #endif /* SLAPD_OVER_SYNCPROV == SLAPD_MOD_DYNAMIC */
2297
2298 #endif /* defined(SLAPD_OVER_SYNCPROV) */