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 2004-2011 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 #include "config.h"
  29 #include "ldap_rq.h"
  30
  31 #ifdef LDAP_DEVEL
  32 #define CHECK_CSN       1
  33 #endif
  34
  35 /* A modify request on a particular entry */
  36 typedef struct modinst {
  37         struct modinst *mi_next;
  38         Operation *mi_op;
  39 } modinst;
  40
  41 typedef struct modtarget {
  42         struct modinst *mt_mods;
  43         struct modinst *mt_tail;
  44         Operation *mt_op;
  45         ldap_pvt_thread_mutex_t mt_mutex;
  46 } modtarget;
  47
  48 /* A queued result of a persistent search */
  49 typedef struct syncres {
  50         struct syncres *s_next;
  51         Entry *s_e;
  52         struct berval s_dn;
  53         struct berval s_ndn;
  54         struct berval s_uuid;
  55         struct berval s_csn;
  56         char s_mode;
  57         char s_isreference;
  58 } syncres;
  59
  60 /* Record of a persistent search */
  61 typedef struct syncops {
  62         struct syncops *s_next;
  63         struct berval   s_base;         /* ndn of search base */
  64         ID              s_eid;          /* entryID of search base */
  65         Operation       *s_op;          /* search op */
  66         int             s_rid;
  67         int             s_sid;
  68         struct berval s_filterstr;
  69         int             s_flags;        /* search status */
  70 #define PS_IS_REFRESHING        0x01
  71 #define PS_IS_DETACHED          0x02
  72 #define PS_WROTE_BASE           0x04
  73 #define PS_FIND_BASE            0x08
  74 #define PS_FIX_FILTER           0x10
  75 #define PS_TASK_QUEUED          0x20
  76
  77         int             s_inuse;        /* reference count */
  78         struct syncres *s_res;
  79         struct syncres *s_restail;
  80         ldap_pvt_thread_mutex_t s_mutex;
  81 } syncops;
  82
  83 /* A received sync control */
  84 typedef struct sync_control {
  85         struct sync_cookie sr_state;
  86         int sr_rhint;
  87 } sync_control;
  88
  89 #if 0 /* moved back to slap.h */
  90 #define o_sync  o_ctrlflag[slap_cids.sc_LDAPsync]
  91 #endif
  92 /* o_sync_mode uses data bits of o_sync */
  93 #define o_sync_mode     o_ctrlflag[slap_cids.sc_LDAPsync]
  94
  95 #define SLAP_SYNC_NONE                                  (LDAP_SYNC_NONE<<SLAP_CONTROL_SHIFT)
  96 #define SLAP_SYNC_REFRESH                               (LDAP_SYNC_REFRESH_ONLY<<SLAP_CONTROL_SHIFT)
  97 #define SLAP_SYNC_PERSIST                               (LDAP_SYNC_RESERVED<<SLAP_CONTROL_SHIFT)
  98 #define SLAP_SYNC_REFRESH_AND_PERSIST   (LDAP_SYNC_REFRESH_AND_PERSIST<<SLAP_CONTROL_SHIFT)
  99
 100 /* Record of which searches matched at premodify step */
 101 typedef struct syncmatches {
 102         struct syncmatches *sm_next;
 103         syncops *sm_op;
 104 } syncmatches;
 105
 106 /* Session log data */
 107 typedef struct slog_entry {
 108         struct slog_entry *se_next;
 109         struct berval se_uuid;
 110         struct berval se_csn;
 111         int     se_sid;
 112         ber_tag_t       se_tag;
 113 } slog_entry;
 114
 115 typedef struct sessionlog {
 116         int             sl_num;
 117         int             sl_size;
 118         slog_entry *sl_head;
 119         slog_entry *sl_tail;
 120         ldap_pvt_thread_mutex_t sl_mutex;
 121 } sessionlog;
 122
 123 /* The main state for this overlay */
 124 typedef struct syncprov_info_t {
 125         syncops         *si_ops;
 126         BerVarray       si_ctxcsn;      /* ldapsync context */
 127         struct berval   si_contextdn;
 128         int             *si_sids;
 129         int             si_numcsns;
 130         int             si_chkops;      /* checkpointing info */
 131         int             si_chktime;
 132         int             si_numops;      /* number of ops since last checkpoint */
 133         int             si_nopres;      /* Skip present phase */
 134         int             si_usehint;     /* use reload hint */
 135         int             si_active;      /* True if there are active mods */
 136         int             si_dirty;       /* True if the context is dirty, i.e changes
 137                                                  * have been made without updating the csn. */
 138         time_t  si_chklast;     /* time of last checkpoint */
 139         Avlnode *si_mods;       /* entries being modified */
 140         sessionlog      *si_logs;
 141         ldap_pvt_thread_rdwr_t  si_csn_rwlock;
 142         ldap_pvt_thread_mutex_t si_ops_mutex;
 143         ldap_pvt_thread_mutex_t si_mods_mutex;
 144         ldap_pvt_thread_mutex_t si_resp_mutex;
 145 } syncprov_info_t;
 146
 147 typedef struct opcookie {
 148         slap_overinst *son;
 149         syncmatches *smatches;
 150         modtarget *smt;
 151         Entry *se;
 152         struct berval sdn;      /* DN of entry, for deletes */
 153         struct berval sndn;
 154         struct berval suuid;    /* UUID of entry */
 155         struct berval sctxcsn;
 156         short osid;     /* sid of op csn */
 157         short rsid;     /* sid of relay */
 158         short sreference;       /* Is the entry a reference? */
 159 } opcookie;
 160
 161 typedef struct mutexint {
 162         ldap_pvt_thread_mutex_t mi_mutex;
 163         int mi_int;
 164 } mutexint;
 165
 166 typedef struct fbase_cookie {
 167         struct berval *fdn;     /* DN of a modified entry, for scope testing */
 168         syncops *fss;   /* persistent search we're testing against */
 169         int fbase;      /* if TRUE we found the search base and it's still valid */
 170         int fscope;     /* if TRUE then fdn is within the psearch scope */
 171 } fbase_cookie;
 172
 173 static AttributeName csn_anlist[3];
 174 static AttributeName uuid_anlist[2];
 175
 176 /* Build a LDAPsync intermediate state control */
 177 static int
 178 syncprov_state_ctrl(
 179         Operation       *op,
 180         SlapReply       *rs,
 181         Entry           *e,
 182         int             entry_sync_state,
 183         LDAPControl     **ctrls,
 184         int             num_ctrls,
 185         int             send_cookie,
 186         struct berval   *cookie )
 187 {
 188         Attribute* a;
 189         int ret;
 190
 191         BerElementBuffer berbuf;
 192         BerElement *ber = (BerElement *)&berbuf;
 193
 194         struct berval   entryuuid_bv = BER_BVNULL;
 195
 196         ber_init2( ber, 0, LBER_USE_DER );
 197         ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
 198
 199         ctrls[num_ctrls] = op->o_tmpalloc( sizeof ( LDAPControl ), op->o_tmpmemctx );
 200
 201         for ( a = e->e_attrs; a != NULL; a = a->a_next ) {
 202                 AttributeDescription *desc = a->a_desc;
 203                 if ( desc == slap_schema.si_ad_entryUUID ) {
 204                         entryuuid_bv = a->a_nvals[0];
 205                         break;
 206                 }
 207         }
 208
 209         /* FIXME: what if entryuuid is NULL or empty ? */
 210
 211         if ( send_cookie && cookie ) {
 212                 ber_printf( ber, "{eOON}",
 213                         entry_sync_state, &entryuuid_bv, cookie );
 214         } else {
 215                 ber_printf( ber, "{eON}",
 216                         entry_sync_state, &entryuuid_bv );
 217         }
 218
 219         ctrls[num_ctrls]->ldctl_oid = LDAP_CONTROL_SYNC_STATE;
 220         ctrls[num_ctrls]->ldctl_iscritical = (op->o_sync == SLAP_CONTROL_CRITICAL);
 221         ret = ber_flatten2( ber, &ctrls[num_ctrls]->ldctl_value, 1 );
 222
 223         ber_free_buf( ber );
 224
 225         if ( ret < 0 ) {
 226                 Debug( LDAP_DEBUG_TRACE,
 227                         "slap_build_sync_ctrl: ber_flatten2 failed\n",
 228                         0, 0, 0 );
 229                 send_ldap_error( op, rs, LDAP_OTHER, "internal error" );
 230                 return ret;
 231         }
 232
 233         return LDAP_SUCCESS;
 234 }
 235
 236 /* Build a LDAPsync final state control */
 237 static int
 238 syncprov_done_ctrl(
 239         Operation       *op,
 240         SlapReply       *rs,
 241         LDAPControl     **ctrls,
 242         int                     num_ctrls,
 243         int                     send_cookie,
 244         struct berval *cookie,
 245         int                     refreshDeletes )
 246 {
 247         int ret;
 248         BerElementBuffer berbuf;
 249         BerElement *ber = (BerElement *)&berbuf;
 250
 251         ber_init2( ber, NULL, LBER_USE_DER );
 252         ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
 253
 254         ctrls[num_ctrls] = op->o_tmpalloc( sizeof ( LDAPControl ), op->o_tmpmemctx );
 255
 256         ber_printf( ber, "{" );
 257         if ( send_cookie && cookie ) {
 258                 ber_printf( ber, "O", cookie );
 259         }
 260         if ( refreshDeletes == LDAP_SYNC_REFRESH_DELETES ) {
 261                 ber_printf( ber, "b", refreshDeletes );
 262         }
 263         ber_printf( ber, "N}" );
 264
 265         ctrls[num_ctrls]->ldctl_oid = LDAP_CONTROL_SYNC_DONE;
 266         ctrls[num_ctrls]->ldctl_iscritical = (op->o_sync == SLAP_CONTROL_CRITICAL);
 267         ret = ber_flatten2( ber, &ctrls[num_ctrls]->ldctl_value, 1 );
 268
 269         ber_free_buf( ber );
 270
 271         if ( ret < 0 ) {
 272                 Debug( LDAP_DEBUG_TRACE,
 273                         "syncprov_done_ctrl: ber_flatten2 failed\n",
 274                         0, 0, 0 );
 275                 send_ldap_error( op, rs, LDAP_OTHER, "internal error" );
 276                 return ret;
 277         }
 278
 279         return LDAP_SUCCESS;
 280 }
 281
 282 static int
 283 syncprov_sendinfo(
 284         Operation       *op,
 285         SlapReply       *rs,
 286         int                     type,
 287         struct berval *cookie,
 288         int                     refreshDone,
 289         BerVarray       syncUUIDs,
 290         int                     refreshDeletes )
 291 {
 292         BerElementBuffer berbuf;
 293         BerElement *ber = (BerElement *)&berbuf;
 294         struct berval rspdata;
 295
 296         int ret;
 297
 298         ber_init2( ber, NULL, LBER_USE_DER );
 299         ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
 300
 301         if ( type ) {
 302                 switch ( type ) {
 303                 case LDAP_TAG_SYNC_NEW_COOKIE:
 304                         ber_printf( ber, "tO", type, cookie );
 305                         break;
 306                 case LDAP_TAG_SYNC_REFRESH_DELETE:
 307                 case LDAP_TAG_SYNC_REFRESH_PRESENT:
 308                         ber_printf( ber, "t{", type );
 309                         if ( cookie ) {
 310                                 ber_printf( ber, "O", cookie );
 311                         }
 312                         if ( refreshDone == 0 ) {
 313                                 ber_printf( ber, "b", refreshDone );
 314                         }
 315                         ber_printf( ber, "N}" );
 316                         break;
 317                 case LDAP_TAG_SYNC_ID_SET:
 318                         ber_printf( ber, "t{", type );
 319                         if ( cookie ) {
 320                                 ber_printf( ber, "O", cookie );
 321                         }
 322                         if ( refreshDeletes == 1 ) {
 323                                 ber_printf( ber, "b", refreshDeletes );
 324                         }
 325                         ber_printf( ber, "[W]", syncUUIDs );
 326                         ber_printf( ber, "N}" );
 327                         break;
 328                 default:
 329                         Debug( LDAP_DEBUG_TRACE,
 330                                 "syncprov_sendinfo: invalid syncinfo type (%d)\n",
 331                                 type, 0, 0 );
 332                         return LDAP_OTHER;
 333                 }
 334         }
 335
 336         ret = ber_flatten2( ber, &rspdata, 0 );
 337
 338         if ( ret < 0 ) {
 339                 Debug( LDAP_DEBUG_TRACE,
 340                         "syncprov_sendinfo: ber_flatten2 failed\n",
 341                         0, 0, 0 );
 342                 send_ldap_error( op, rs, LDAP_OTHER, "internal error" );
 343                 return ret;
 344         }
 345
 346         rs->sr_rspoid = LDAP_SYNC_INFO;
 347         rs->sr_rspdata = &rspdata;
 348         send_ldap_intermediate( op, rs );
 349         rs->sr_rspdata = NULL;
 350         ber_free_buf( ber );
 351
 352         return LDAP_SUCCESS;
 353 }
 354
 355 /* Find a modtarget in an AVL tree */
 356 static int
 357 sp_avl_cmp( const void *c1, const void *c2 )
 358 {
 359         const modtarget *m1, *m2;
 360         int rc;
 361
 362         m1 = c1; m2 = c2;
 363         rc = m1->mt_op->o_req_ndn.bv_len - m2->mt_op->o_req_ndn.bv_len;
 364
 365         if ( rc ) return rc;
 366         return ber_bvcmp( &m1->mt_op->o_req_ndn, &m2->mt_op->o_req_ndn );
 367 }
 368
 369 /* syncprov_findbase:
 370  *   finds the true DN of the base of a search (with alias dereferencing) and
 371  * checks to make sure the base entry doesn't get replaced with a different
 372  * entry (e.g., swapping trees via ModDN, or retargeting an alias). If a
 373  * change is detected, any persistent search on this base must be terminated /
 374  * reloaded.
 375  *   On the first call, we just save the DN and entryID. On subsequent calls
 376  * we compare the DN and entryID with the saved values.
 377  */
 378 static int
 379 findbase_cb( Operation *op, SlapReply *rs )
 380 {
 381         slap_callback *sc = op->o_callback;
 382
 383         if ( rs->sr_type == REP_SEARCH && rs->sr_err == LDAP_SUCCESS ) {
 384                 fbase_cookie *fc = sc->sc_private;
 385
 386                 /* If no entryID, we're looking for the first time.
 387                  * Just store whatever we got.
 388                  */
 389                 if ( fc->fss->s_eid == NOID ) {
 390                         fc->fbase = 2;
 391                         fc->fss->s_eid = rs->sr_entry->e_id;
 392                         ber_dupbv( &fc->fss->s_base, &rs->sr_entry->e_nname );
 393
 394                 } else if ( rs->sr_entry->e_id == fc->fss->s_eid &&
 395                         dn_match( &rs->sr_entry->e_nname, &fc->fss->s_base )) {
 396
 397                 /* OK, the DN is the same and the entryID is the same. */
 398                         fc->fbase = 1;
 399                 }
 400         }
 401         if ( rs->sr_err != LDAP_SUCCESS ) {
 402                 Debug( LDAP_DEBUG_ANY, "findbase failed! %d\n", rs->sr_err,0,0 );
 403         }
 404         return LDAP_SUCCESS;
 405 }
 406
 407 static Filter generic_filter = { LDAP_FILTER_PRESENT, { 0 }, NULL };
 408 static struct berval generic_filterstr = BER_BVC("(objectclass=*)");
 409
 410 static int
 411 syncprov_findbase( Operation *op, fbase_cookie *fc )
 412 {
 413         /* Use basic parameters from syncrepl search, but use
 414          * current op's threadctx / tmpmemctx
 415          */
 416         ldap_pvt_thread_mutex_lock( &fc->fss->s_mutex );
 417         if ( fc->fss->s_flags & PS_FIND_BASE ) {
 418                 slap_callback cb = {0};
 419                 Operation fop;
 420                 SlapReply frs = { REP_RESULT };
 421                 int rc;
 422
 423                 fc->fss->s_flags ^= PS_FIND_BASE;
 424                 ldap_pvt_thread_mutex_unlock( &fc->fss->s_mutex );
 425
 426                 fop = *fc->fss->s_op;
 427
 428                 fop.o_bd = fop.o_bd->bd_self;
 429                 fop.o_hdr = op->o_hdr;
 430                 fop.o_time = op->o_time;
 431                 fop.o_tincr = op->o_tincr;
 432
 433                 cb.sc_response = findbase_cb;
 434                 cb.sc_private = fc;
 435
 436                 fop.o_sync_mode = 0;    /* turn off sync mode */
 437                 fop.o_managedsait = SLAP_CONTROL_CRITICAL;
 438                 fop.o_callback = &cb;
 439                 fop.o_tag = LDAP_REQ_SEARCH;
 440                 fop.ors_scope = LDAP_SCOPE_BASE;
 441                 fop.ors_limit = NULL;
 442                 fop.ors_slimit = 1;
 443                 fop.ors_tlimit = SLAP_NO_LIMIT;
 444                 fop.ors_attrs = slap_anlist_no_attrs;
 445                 fop.ors_attrsonly = 1;
 446                 fop.ors_filter = &generic_filter;
 447                 fop.ors_filterstr = generic_filterstr;
 448
 449                 rc = fop.o_bd->be_search( &fop, &frs );
 450         } else {
 451                 ldap_pvt_thread_mutex_unlock( &fc->fss->s_mutex );
 452                 fc->fbase = 1;
 453         }
 454
 455         /* After the first call, see if the fdn resides in the scope */
 456         if ( fc->fbase == 1 ) {
 457                 switch ( fc->fss->s_op->ors_scope ) {
 458                 case LDAP_SCOPE_BASE:
 459                         fc->fscope = dn_match( fc->fdn, &fc->fss->s_base );
 460                         break;
 461                 case LDAP_SCOPE_ONELEVEL: {
 462                         struct berval pdn;
 463                         dnParent( fc->fdn, &pdn );
 464                         fc->fscope = dn_match( &pdn, &fc->fss->s_base );
 465                         break; }
 466                 case LDAP_SCOPE_SUBTREE:
 467                         fc->fscope = dnIsSuffix( fc->fdn, &fc->fss->s_base );
 468                         break;
 469                 case LDAP_SCOPE_SUBORDINATE:
 470                         fc->fscope = dnIsSuffix( fc->fdn, &fc->fss->s_base ) &&
 471                                 !dn_match( fc->fdn, &fc->fss->s_base );
 472                         break;
 473                 }
 474         }
 475
 476         if ( fc->fbase )
 477                 return LDAP_SUCCESS;
 478
 479         /* If entryID has changed, then the base of this search has
 480          * changed. Invalidate the psearch.
 481          */
 482         return LDAP_NO_SUCH_OBJECT;
 483 }
 484
 485 /* syncprov_findcsn:
 486  *   This function has three different purposes, but they all use a search
 487  * that filters on entryCSN so they're combined here.
 488  * 1: at startup time, after a contextCSN has been read from the database,
 489  * we search for all entries with CSN >= contextCSN in case the contextCSN
 490  * was not checkpointed at the previous shutdown.
 491  *
 492  * 2: when the current contextCSN is known and we have a sync cookie, we search
 493  * for one entry with CSN = the cookie CSN. If not found, try <= cookie CSN.
 494  * If an entry is found, the cookie CSN is valid, otherwise it is stale.
 495  *
 496  * 3: during a refresh phase, we search for all entries with CSN <= the cookie
 497  * CSN, and generate Present records for them. We always collect this result
 498  * in SyncID sets, even if there's only one match.
 499  */
 500 typedef enum find_csn_t {
 501         FIND_MAXCSN     = 1,
 502         FIND_CSN        = 2,
 503         FIND_PRESENT    = 3
 504 } find_csn_t;
 505
 506 static int
 507 findmax_cb( Operation *op, SlapReply *rs )
 508 {
 509         if ( rs->sr_type == REP_SEARCH && rs->sr_err == LDAP_SUCCESS ) {
 510                 struct berval *maxcsn = op->o_callback->sc_private;
 511                 Attribute *a = attr_find( rs->sr_entry->e_attrs,
 512                         slap_schema.si_ad_entryCSN );
 513
 514                 if ( a && ber_bvcmp( &a->a_vals[0], maxcsn ) > 0 &&
 515                         slap_parse_csn_sid( &a->a_vals[0] ) == slap_serverID ) {
 516                         maxcsn->bv_len = a->a_vals[0].bv_len;
 517                         strcpy( maxcsn->bv_val, a->a_vals[0].bv_val );
 518                 }
 519         }
 520         return LDAP_SUCCESS;
 521 }
 522
 523 static int
 524 findcsn_cb( Operation *op, SlapReply *rs )
 525 {
 526         slap_callback *sc = op->o_callback;
 527
 528         /* We just want to know that at least one exists, so it's OK if
 529          * we exceed the unchecked limit.
 530          */
 531         if ( rs->sr_err == LDAP_ADMINLIMIT_EXCEEDED ||
 532                 (rs->sr_type == REP_SEARCH && rs->sr_err == LDAP_SUCCESS )) {
 533                 sc->sc_private = (void *)1;
 534         }
 535         return LDAP_SUCCESS;
 536 }
 537
 538 /* Build a list of entryUUIDs for sending in a SyncID set */
 539
 540 #define UUID_LEN        16
 541
 542 typedef struct fpres_cookie {
 543         int num;
 544         BerVarray uuids;
 545         char *last;
 546 } fpres_cookie;
 547
 548 static int
 549 findpres_cb( Operation *op, SlapReply *rs )
 550 {
 551         slap_callback *sc = op->o_callback;
 552         fpres_cookie *pc = sc->sc_private;
 553         Attribute *a;
 554         int ret = SLAP_CB_CONTINUE;
 555
 556         switch ( rs->sr_type ) {
 557         case REP_SEARCH:
 558                 a = attr_find( rs->sr_entry->e_attrs, slap_schema.si_ad_entryUUID );
 559                 if ( a ) {
 560                         pc->uuids[pc->num].bv_val = pc->last;
 561                         AC_MEMCPY( pc->uuids[pc->num].bv_val, a->a_nvals[0].bv_val,
 562                                 pc->uuids[pc->num].bv_len );
 563                         pc->num++;
 564                         pc->last = pc->uuids[pc->num].bv_val;
 565                         pc->uuids[pc->num].bv_val = NULL;
 566                 }
 567                 ret = LDAP_SUCCESS;
 568                 if ( pc->num != SLAP_SYNCUUID_SET_SIZE )
 569                         break;
 570                 /* FALLTHRU */
 571         case REP_RESULT:
 572                 ret = rs->sr_err;
 573                 if ( pc->num ) {
 574                         ret = syncprov_sendinfo( op, rs, LDAP_TAG_SYNC_ID_SET, NULL,
 575                                 0, pc->uuids, 0 );
 576                         pc->uuids[pc->num].bv_val = pc->last;
 577                         pc->num = 0;
 578                         pc->last = pc->uuids[0].bv_val;
 579                 }
 580                 break;
 581         default:
 582                 break;
 583         }
 584         return ret;
 585 }
 586
 587 static int
 588 syncprov_findcsn( Operation *op, find_csn_t mode )
 589 {
 590         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
 591         syncprov_info_t         *si = on->on_bi.bi_private;
 592
 593         slap_callback cb = {0};
 594         Operation fop;
 595         SlapReply frs = { REP_RESULT };
 596         char buf[LDAP_PVT_CSNSTR_BUFSIZE + STRLENOF("(entryCSN<=)")];
 597         char cbuf[LDAP_PVT_CSNSTR_BUFSIZE];
 598         struct berval maxcsn;
 599         Filter cf;
 600         AttributeAssertion eq = ATTRIBUTEASSERTION_INIT;
 601         fpres_cookie pcookie;
 602         sync_control *srs = NULL;
 603         struct slap_limits_set fc_limits;
 604         int i, rc = LDAP_SUCCESS, findcsn_retry = 1;
 605         int maxid;
 606
 607         if ( mode != FIND_MAXCSN ) {
 608                 srs = op->o_controls[slap_cids.sc_LDAPsync];
 609         }
 610
 611         fop = *op;
 612         fop.o_sync_mode &= SLAP_CONTROL_MASK;   /* turn off sync_mode */
 613         /* We want pure entries, not referrals */
 614         fop.o_managedsait = SLAP_CONTROL_CRITICAL;
 615
 616         cf.f_ava = &eq;
 617         cf.f_av_desc = slap_schema.si_ad_entryCSN;
 618         BER_BVZERO( &cf.f_av_value );
 619         cf.f_next = NULL;
 620
 621         fop.o_callback = &cb;
 622         fop.ors_limit = NULL;
 623         fop.ors_tlimit = SLAP_NO_LIMIT;
 624         fop.ors_filter = &cf;
 625         fop.ors_filterstr.bv_val = buf;
 626
 627 again:
 628         switch( mode ) {
 629         case FIND_MAXCSN:
 630                 cf.f_choice = LDAP_FILTER_GE;
 631                 /* If there are multiple CSNs, use the one with our serverID */
 632                 for ( i=0; i<si->si_numcsns; i++) {
 633                         if ( slap_serverID == si->si_sids[i] ) {
 634                                 maxid = i;
 635                                 break;
 636                         }
 637                 }
 638                 if ( i == si->si_numcsns ) {
 639                         /* No match: this is multimaster, and none of the content in the DB
 640                          * originated locally. Treat like no CSN.
 641                          */
 642                         return LDAP_NO_SUCH_OBJECT;
 643                 }
 644                 cf.f_av_value = si->si_ctxcsn[maxid];
 645                 fop.ors_filterstr.bv_len = snprintf( buf, sizeof( buf ),
 646                         "(entryCSN>=%s)", cf.f_av_value.bv_val );
 647                 if ( fop.ors_filterstr.bv_len >= sizeof( buf ) ) {
 648                         return LDAP_OTHER;
 649                 }
 650                 fop.ors_attrsonly = 0;
 651                 fop.ors_attrs = csn_anlist;
 652                 fop.ors_slimit = SLAP_NO_LIMIT;
 653                 cb.sc_private = &maxcsn;
 654                 cb.sc_response = findmax_cb;
 655                 strcpy( cbuf, cf.f_av_value.bv_val );
 656                 maxcsn.bv_val = cbuf;
 657                 maxcsn.bv_len = cf.f_av_value.bv_len;
 658                 break;
 659         case FIND_CSN:
 660                 if ( BER_BVISEMPTY( &cf.f_av_value )) {
 661                         cf.f_av_value = srs->sr_state.ctxcsn[0];
 662                         /* If there are multiple CSNs, use the smallest */
 663                         for ( i=1; i<srs->sr_state.numcsns; i++ ) {
 664                                 if ( ber_bvcmp( &cf.f_av_value, &srs->sr_state.ctxcsn[i] )
 665                                         > 0 ) {
 666                                         cf.f_av_value = srs->sr_state.ctxcsn[i];
 667                                 }
 668                         }
 669                 }
 670                 /* Look for exact match the first time */
 671                 if ( findcsn_retry ) {
 672                         cf.f_choice = LDAP_FILTER_EQUALITY;
 673                         fop.ors_filterstr.bv_len = snprintf( buf, sizeof( buf ),
 674                                 "(entryCSN=%s)", cf.f_av_value.bv_val );
 675                 /* On retry, look for <= */
 676                 } else {
 677                         cf.f_choice = LDAP_FILTER_LE;
 678                         fop.ors_limit = &fc_limits;
 679                         memset( &fc_limits, 0, sizeof( fc_limits ));
 680                         fc_limits.lms_s_unchecked = 1;
 681                         fop.ors_filterstr.bv_len = snprintf( buf, sizeof( buf ),
 682                                 "(entryCSN<=%s)", cf.f_av_value.bv_val );
 683                 }
 684                 if ( fop.ors_filterstr.bv_len >= sizeof( buf ) ) {
 685                         return LDAP_OTHER;
 686                 }
 687                 fop.ors_attrsonly = 1;
 688                 fop.ors_attrs = slap_anlist_no_attrs;
 689                 fop.ors_slimit = 1;
 690                 cb.sc_private = NULL;
 691                 cb.sc_response = findcsn_cb;
 692                 break;
 693         case FIND_PRESENT:
 694                 fop.ors_filter = op->ors_filter;
 695                 fop.ors_filterstr = op->ors_filterstr;
 696                 fop.ors_attrsonly = 0;
 697                 fop.ors_attrs = uuid_anlist;
 698                 fop.ors_slimit = SLAP_NO_LIMIT;
 699                 cb.sc_private = &pcookie;
 700                 cb.sc_response = findpres_cb;
 701                 pcookie.num = 0;
 702
 703                 /* preallocate storage for a full set */
 704                 pcookie.uuids = op->o_tmpalloc( (SLAP_SYNCUUID_SET_SIZE+1) *
 705                         sizeof(struct berval) + SLAP_SYNCUUID_SET_SIZE * UUID_LEN,
 706                         op->o_tmpmemctx );
 707                 pcookie.last = (char *)(pcookie.uuids + SLAP_SYNCUUID_SET_SIZE+1);
 708                 pcookie.uuids[0].bv_val = pcookie.last;
 709                 pcookie.uuids[0].bv_len = UUID_LEN;
 710                 for (i=1; i<SLAP_SYNCUUID_SET_SIZE; i++) {
 711                         pcookie.uuids[i].bv_val = pcookie.uuids[i-1].bv_val + UUID_LEN;
 712                         pcookie.uuids[i].bv_len = UUID_LEN;
 713                 }
 714                 break;
 715         }
 716
 717         fop.o_bd->bd_info = (BackendInfo *)on->on_info;
 718         fop.o_bd->be_search( &fop, &frs );
 719         fop.o_bd->bd_info = (BackendInfo *)on;
 720
 721         switch( mode ) {
 722         case FIND_MAXCSN:
 723                 if ( ber_bvcmp( &si->si_ctxcsn[maxid], &maxcsn )) {
 724 #ifdef CHECK_CSN
 725                         Syntax *syn = slap_schema.si_ad_contextCSN->ad_type->sat_syntax;
 726                         assert( !syn->ssyn_validate( syn, &maxcsn ));
 727 #endif
 728                         ber_bvreplace( &si->si_ctxcsn[maxid], &maxcsn );
 729                         si->si_numops++;        /* ensure a checkpoint */
 730                 }
 731                 break;
 732         case FIND_CSN:
 733                 /* If matching CSN was not found, invalidate the context. */
 734                 if ( !cb.sc_private ) {
 735                         /* If we didn't find an exact match, then try for <= */
 736                         if ( findcsn_retry ) {
 737                                 findcsn_retry = 0;
 738                                 rs_reinit( &frs, REP_RESULT );
 739                                 goto again;
 740                         }
 741                         rc = LDAP_NO_SUCH_OBJECT;
 742                 }
 743                 break;
 744         case FIND_PRESENT:
 745                 op->o_tmpfree( pcookie.uuids, op->o_tmpmemctx );
 746                 break;
 747         }
 748
 749         return rc;
 750 }
 751
 752 /* Should find a place to cache these */
 753 static mutexint *get_mutexint()
 754 {
 755         mutexint *mi = ch_malloc( sizeof( mutexint ));
 756         ldap_pvt_thread_mutex_init( &mi->mi_mutex );
 757         mi->mi_int = 1;
 758         return mi;
 759 }
 760
 761 static void inc_mutexint( mutexint *mi )
 762 {
 763         ldap_pvt_thread_mutex_lock( &mi->mi_mutex );
 764         mi->mi_int++;
 765         ldap_pvt_thread_mutex_unlock( &mi->mi_mutex );
 766 }
 767
 768 /* return resulting counter */
 769 static int dec_mutexint( mutexint *mi )
 770 {
 771         int i;
 772         ldap_pvt_thread_mutex_lock( &mi->mi_mutex );
 773         i = --mi->mi_int;
 774         ldap_pvt_thread_mutex_unlock( &mi->mi_mutex );
 775         if ( !i ) {
 776                 ldap_pvt_thread_mutex_destroy( &mi->mi_mutex );
 777                 ch_free( mi );
 778         }
 779         return i;
 780 }
 781
 782 static void
 783 syncprov_free_syncop( syncops *so )
 784 {
 785         syncres *sr, *srnext;
 786         GroupAssertion *ga, *gnext;
 787
 788         ldap_pvt_thread_mutex_lock( &so->s_mutex );
 789         /* already being freed, or still in use */
 790         if ( !so->s_inuse || --so->s_inuse > 0 ) {
 791                 ldap_pvt_thread_mutex_unlock( &so->s_mutex );
 792                 return;
 793         }
 794         ldap_pvt_thread_mutex_unlock( &so->s_mutex );
 795         if ( so->s_flags & PS_IS_DETACHED ) {
 796                 filter_free( so->s_op->ors_filter );
 797                 for ( ga = so->s_op->o_groups; ga; ga=gnext ) {
 798                         gnext = ga->ga_next;
 799                         ch_free( ga );
 800                 }
 801                 ch_free( so->s_op );
 802         }
 803         ch_free( so->s_base.bv_val );
 804         for ( sr=so->s_res; sr; sr=srnext ) {
 805                 srnext = sr->s_next;
 806                 if ( sr->s_e ) {
 807                         if ( !dec_mutexint( sr->s_e->e_private )) {
 808                                 sr->s_e->e_private = NULL;
 809                                 entry_free( sr->s_e );
 810                         }
 811                 }
 812                 ch_free( sr );
 813         }
 814         ldap_pvt_thread_mutex_destroy( &so->s_mutex );
 815         ch_free( so );
 816 }
 817
 818 /* Send a persistent search response */
 819 static int
 820 syncprov_sendresp( Operation *op, opcookie *opc, syncops *so, int mode )
 821 {
 822         SlapReply rs = { REP_SEARCH };
 823         LDAPControl *ctrls[2];
 824         struct berval cookie = BER_BVNULL, csns[2];
 825         Entry e_uuid = {0};
 826         Attribute a_uuid = {0};
 827
 828         if ( so->s_op->o_abandon )
 829                 return SLAPD_ABANDON;
 830
 831         ctrls[1] = NULL;
 832         if ( !BER_BVISNULL( &opc->sctxcsn )) {
 833                 csns[0] = opc->sctxcsn;
 834                 BER_BVZERO( &csns[1] );
 835                 slap_compose_sync_cookie( op, &cookie, csns, so->s_rid, slap_serverID ? slap_serverID : -1 );
 836         }
 837
 838 #ifdef LDAP_DEBUG
 839         if ( so->s_sid > 0 ) {
 840                 Debug( LDAP_DEBUG_SYNC, "syncprov_sendresp: to=%03x, cookie=%s\n",
 841                         so->s_sid, cookie.bv_val ? cookie.bv_val : "", 0 );
 842         } else {
 843                 Debug( LDAP_DEBUG_SYNC, "syncprov_sendresp: cookie=%s\n",
 844                         cookie.bv_val ? cookie.bv_val : "", 0, 0 );
 845         }
 846 #endif
 847
 848         e_uuid.e_attrs = &a_uuid;
 849         a_uuid.a_desc = slap_schema.si_ad_entryUUID;
 850         a_uuid.a_nvals = &opc->suuid;
 851         rs.sr_err = syncprov_state_ctrl( op, &rs, &e_uuid,
 852                 mode, ctrls, 0, 1, &cookie );
 853         if ( !BER_BVISNULL( &cookie )) {
 854                 op->o_tmpfree( cookie.bv_val, op->o_tmpmemctx );
 855         }
 856
 857         rs.sr_ctrls = ctrls;
 858         rs.sr_entry = &e_uuid;
 859         if ( mode == LDAP_SYNC_ADD || mode == LDAP_SYNC_MODIFY ) {
 860                 e_uuid = *opc->se;
 861                 e_uuid.e_private = NULL;
 862         }
 863
 864         switch( mode ) {
 865         case LDAP_SYNC_ADD:
 866                 if ( opc->sreference && so->s_op->o_managedsait <= SLAP_CONTROL_IGNORED ) {
 867                         rs.sr_ref = get_entry_referrals( op, rs.sr_entry );
 868                         rs.sr_err = send_search_reference( op, &rs );
 869                         ber_bvarray_free( rs.sr_ref );
 870                         break;
 871                 }
 872                 /* fallthru */
 873         case LDAP_SYNC_MODIFY:
 874                 rs.sr_attrs = op->ors_attrs;
 875                 rs.sr_err = send_search_entry( op, &rs );
 876                 break;
 877         case LDAP_SYNC_DELETE:
 878                 e_uuid.e_attrs = NULL;
 879                 e_uuid.e_name = opc->sdn;
 880                 e_uuid.e_nname = opc->sndn;
 881                 if ( opc->sreference && so->s_op->o_managedsait <= SLAP_CONTROL_IGNORED ) {
 882                         struct berval bv = BER_BVNULL;
 883                         rs.sr_ref = &bv;
 884                         rs.sr_err = send_search_reference( op, &rs );
 885                 } else {
 886                         rs.sr_err = send_search_entry( op, &rs );
 887                 }
 888                 break;
 889         default:
 890                 assert(0);
 891         }
 892         /* In case someone else freed it already? */
 893         if ( rs.sr_ctrls ) {
 894                 int i;
 895                 for ( i=0; rs.sr_ctrls[i]; i++ ) {
 896                         if ( rs.sr_ctrls[i] == ctrls[0] ) {
 897                                 op->o_tmpfree( ctrls[0]->ldctl_value.bv_val, op->o_tmpmemctx );
 898                                 ctrls[0]->ldctl_value.bv_val = NULL;
 899                                 break;
 900                         }
 901                 }
 902                 rs.sr_ctrls = NULL;
 903         }
 904
 905         return rs.sr_err;
 906 }
 907
 908 static void
 909 syncprov_qstart( syncops *so );
 910
 911 /* Play back queued responses */
 912 static int
 913 syncprov_qplay( Operation *op, syncops *so )
 914 {
 915         slap_overinst *on = LDAP_SLIST_FIRST(&so->s_op->o_extra)->oe_key;
 916         syncres *sr;
 917         opcookie opc;
 918         int rc = 0;
 919
 920         opc.son = on;
 921
 922         do {
 923                 ldap_pvt_thread_mutex_lock( &so->s_mutex );
 924                 sr = so->s_res;
 925                 if ( sr )
 926                         so->s_res = sr->s_next;
 927                 if ( !so->s_res )
 928                         so->s_restail = NULL;
 929                 /* Exit loop with mutex held */
 930                 if ( !sr || so->s_op->o_abandon )
 931                         break;
 932                 ldap_pvt_thread_mutex_unlock( &so->s_mutex );
 933
 934                 if ( sr->s_mode == LDAP_SYNC_NEW_COOKIE ) {
 935                         SlapReply rs = { REP_INTERMEDIATE };
 936
 937                         rc = syncprov_sendinfo( op, &rs, LDAP_TAG_SYNC_NEW_COOKIE,
 938                                 &sr->s_csn, 0, NULL, 0 );
 939                 } else {
 940                         opc.sdn = sr->s_dn;
 941                         opc.sndn = sr->s_ndn;
 942                         opc.suuid = sr->s_uuid;
 943                         opc.sctxcsn = sr->s_csn;
 944                         opc.sreference = sr->s_isreference;
 945                         opc.se = sr->s_e;
 946
 947                         rc = syncprov_sendresp( op, &opc, so, sr->s_mode );
 948
 949                 }
 950                 if ( sr->s_e ) {
 951                         if ( !dec_mutexint( sr->s_e->e_private )) {
 952                                 sr->s_e->e_private = NULL;
 953                                 entry_free ( sr->s_e );
 954                         }
 955                 }
 956
 957                 ch_free( sr );
 958
 959                 /* Exit loop with mutex held */
 960                 ldap_pvt_thread_mutex_lock( &so->s_mutex );
 961
 962         } while (0);
 963
 964         /* We now only send one change at a time, to prevent one
 965          * psearch from hogging all the CPU. Resubmit this task if
 966          * there are more responses queued and no errors occurred.
 967          */
 968
 969         if ( rc == 0 && so->s_res ) {
 970                 syncprov_qstart( so );
 971         } else {
 972                 so->s_flags ^= PS_TASK_QUEUED;
 973         }
 974
 975         ldap_pvt_thread_mutex_unlock( &so->s_mutex );
 976         return rc;
 977 }
 978
 979 /* task for playing back queued responses */
 980 static void *
 981 syncprov_qtask( void *ctx, void *arg )
 982 {
 983         syncops *so = arg;
 984         OperationBuffer opbuf;
 985         Operation *op;
 986         BackendDB be;
 987         int rc;
 988
 989         op = &opbuf.ob_op;
 990         *op = *so->s_op;
 991         op->o_hdr = &opbuf.ob_hdr;
 992         op->o_controls = opbuf.ob_controls;
 993         memset( op->o_controls, 0, sizeof(opbuf.ob_controls) );
 994
 995         *op->o_hdr = *so->s_op->o_hdr;
 996
 997         op->o_tmpmemctx = slap_sl_mem_create(SLAP_SLAB_SIZE, SLAP_SLAB_STACK, ctx, 1);
 998         op->o_tmpmfuncs = &slap_sl_mfuncs;
 999         op->o_threadctx = ctx;
1000
1001         /* syncprov_qplay expects a fake db */
1002         be = *so->s_op->o_bd;
1003         be.be_flags |= SLAP_DBFLAG_OVERLAY;
1004         op->o_bd = &be;
1005         LDAP_SLIST_FIRST(&op->o_extra) = NULL;
1006         op->o_callback = NULL;
1007
1008         rc = syncprov_qplay( op, so );
1009
1010         /* decrement use count... */
1011         syncprov_free_syncop( so );
1012
1013         return NULL;
1014 }
1015
1016 /* Start the task to play back queued psearch responses */
1017 static void
1018 syncprov_qstart( syncops *so )
1019 {
1020         so->s_flags |= PS_TASK_QUEUED;
1021         so->s_inuse++;
1022         ldap_pvt_thread_pool_submit( &connection_pool,
1023                 syncprov_qtask, so );
1024 }
1025
1026 /* Queue a persistent search response */
1027 static int
1028 syncprov_qresp( opcookie *opc, syncops *so, int mode )
1029 {
1030         syncres *sr;
1031         int srsize;
1032         struct berval cookie = opc->sctxcsn;
1033
1034         if ( mode == LDAP_SYNC_NEW_COOKIE ) {
1035                 syncprov_info_t *si = opc->son->on_bi.bi_private;
1036
1037                 slap_compose_sync_cookie( NULL, &cookie, si->si_ctxcsn,
1038                         so->s_rid, slap_serverID ? slap_serverID : -1);
1039         }
1040
1041         srsize = sizeof(syncres) + opc->suuid.bv_len + 1 +
1042                 opc->sdn.bv_len + 1 + opc->sndn.bv_len + 1;
1043         if ( cookie.bv_len )
1044                 srsize += cookie.bv_len + 1;
1045         sr = ch_malloc( srsize );
1046         sr->s_next = NULL;
1047         sr->s_e = opc->se;
1048         /* bump refcount on this entry */
1049         if ( opc->se )
1050                 inc_mutexint( opc->se->e_private );
1051         sr->s_dn.bv_val = (char *)(sr + 1);
1052         sr->s_dn.bv_len = opc->sdn.bv_len;
1053         sr->s_mode = mode;
1054         sr->s_isreference = opc->sreference;
1055         sr->s_ndn.bv_val = lutil_strcopy( sr->s_dn.bv_val,
1056                  opc->sdn.bv_val ) + 1;
1057         sr->s_ndn.bv_len = opc->sndn.bv_len;
1058         sr->s_uuid.bv_val = lutil_strcopy( sr->s_ndn.bv_val,
1059                  opc->sndn.bv_val ) + 1;
1060         sr->s_uuid.bv_len = opc->suuid.bv_len;
1061         AC_MEMCPY( sr->s_uuid.bv_val, opc->suuid.bv_val, opc->suuid.bv_len );
1062         if ( cookie.bv_len ) {
1063                 sr->s_csn.bv_val = sr->s_uuid.bv_val + sr->s_uuid.bv_len + 1;
1064                 strcpy( sr->s_csn.bv_val, cookie.bv_val );
1065         } else {
1066                 sr->s_csn.bv_val = NULL;
1067         }
1068         sr->s_csn.bv_len = cookie.bv_len;
1069
1070         if ( mode == LDAP_SYNC_NEW_COOKIE && cookie.bv_val ) {
1071                 ch_free( cookie.bv_val );
1072         }
1073
1074         ldap_pvt_thread_mutex_lock( &so->s_mutex );
1075         if ( !so->s_res ) {
1076                 so->s_res = sr;
1077         } else {
1078                 so->s_restail->s_next = sr;
1079         }
1080         so->s_restail = sr;
1081
1082         /* If the base of the psearch was modified, check it next time round */
1083         if ( so->s_flags & PS_WROTE_BASE ) {
1084                 so->s_flags ^= PS_WROTE_BASE;
1085                 so->s_flags |= PS_FIND_BASE;
1086         }
1087         if (( so->s_flags & (PS_IS_DETACHED|PS_TASK_QUEUED)) == PS_IS_DETACHED ) {
1088                 syncprov_qstart( so );
1089         }
1090         ldap_pvt_thread_mutex_unlock( &so->s_mutex );
1091         return LDAP_SUCCESS;
1092 }
1093
1094 static int
1095 syncprov_drop_psearch( syncops *so, int lock )
1096 {
1097         if ( so->s_flags & PS_IS_DETACHED ) {
1098                 if ( lock )
1099                         ldap_pvt_thread_mutex_lock( &so->s_op->o_conn->c_mutex );
1100                 so->s_op->o_conn->c_n_ops_executing--;
1101                 so->s_op->o_conn->c_n_ops_completed++;
1102                 LDAP_STAILQ_REMOVE( &so->s_op->o_conn->c_ops, so->s_op, Operation,
1103                         o_next );
1104                 if ( lock )
1105                         ldap_pvt_thread_mutex_unlock( &so->s_op->o_conn->c_mutex );
1106         }
1107         syncprov_free_syncop( so );
1108
1109         return 0;
1110 }
1111
1112 static int
1113 syncprov_ab_cleanup( Operation *op, SlapReply *rs )
1114 {
1115         slap_callback *sc = op->o_callback;
1116         op->o_callback = sc->sc_next;
1117         syncprov_drop_psearch( op->o_callback->sc_private, 0 );
1118         op->o_tmpfree( sc, op->o_tmpmemctx );
1119         return 0;
1120 }
1121
1122 static int
1123 syncprov_op_abandon( Operation *op, SlapReply *rs )
1124 {
1125         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
1126         syncprov_info_t         *si = on->on_bi.bi_private;
1127         syncops *so, *soprev;
1128
1129         ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
1130         for ( so=si->si_ops, soprev = (syncops *)&si->si_ops; so;
1131                 soprev=so, so=so->s_next ) {
1132                 if ( so->s_op->o_connid == op->o_connid &&
1133                         so->s_op->o_msgid == op->orn_msgid ) {
1134                                 so->s_op->o_abandon = 1;
1135                                 soprev->s_next = so->s_next;
1136                                 break;
1137                 }
1138         }
1139         ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
1140         if ( so ) {
1141                 /* Is this really a Cancel exop? */
1142                 if ( op->o_tag != LDAP_REQ_ABANDON ) {
1143                         so->s_op->o_cancel = SLAP_CANCEL_ACK;
1144                         rs->sr_err = LDAP_CANCELLED;
1145                         send_ldap_result( so->s_op, rs );
1146                         if ( so->s_flags & PS_IS_DETACHED ) {
1147                                 slap_callback *cb;
1148                                 cb = op->o_tmpcalloc( 1, sizeof(slap_callback), op->o_tmpmemctx );
1149                                 cb->sc_cleanup = syncprov_ab_cleanup;
1150                                 cb->sc_next = op->o_callback;
1151                                 cb->sc_private = so;
1152                                 return SLAP_CB_CONTINUE;
1153                         }
1154                 }
1155                 syncprov_drop_psearch( so, 0 );
1156         }
1157         return SLAP_CB_CONTINUE;
1158 }
1159
1160 /* Find which persistent searches are affected by this operation */
1161 static void
1162 syncprov_matchops( Operation *op, opcookie *opc, int saveit )
1163 {
1164         slap_overinst *on = opc->son;
1165         syncprov_info_t         *si = on->on_bi.bi_private;
1166
1167         fbase_cookie fc;
1168         syncops *ss, *sprev, *snext;
1169         Entry *e = NULL;
1170         Attribute *a;
1171         int rc;
1172         struct berval newdn;
1173         int freefdn = 0;
1174         BackendDB *b0 = op->o_bd, db;
1175
1176         fc.fdn = &op->o_req_ndn;
1177         /* compute new DN */
1178         if ( op->o_tag == LDAP_REQ_MODRDN && !saveit ) {
1179                 struct berval pdn;
1180                 if ( op->orr_nnewSup ) pdn = *op->orr_nnewSup;
1181                 else dnParent( fc.fdn, &pdn );
1182                 build_new_dn( &newdn, &pdn, &op->orr_nnewrdn, op->o_tmpmemctx );
1183                 fc.fdn = &newdn;
1184                 freefdn = 1;
1185         }
1186         if ( op->o_tag != LDAP_REQ_ADD ) {
1187                 if ( !SLAP_ISOVERLAY( op->o_bd )) {
1188                         db = *op->o_bd;
1189                         op->o_bd = &db;
1190                 }
1191                 rc = overlay_entry_get_ov( op, fc.fdn, NULL, NULL, 0, &e, on );
1192                 /* If we're sending responses now, make a copy and unlock the DB */
1193                 if ( e && !saveit ) {
1194                         if ( !opc->se ) {
1195                                 opc->se = entry_dup( e );
1196                                 opc->se->e_private = get_mutexint();
1197                         }
1198                         overlay_entry_release_ov( op, e, 0, on );
1199                         e = opc->se;
1200                 }
1201                 if ( rc ) {
1202                         op->o_bd = b0;
1203                         return;
1204                 }
1205         } else {
1206                 e = op->ora_e;
1207                 if ( !saveit ) {
1208                         if ( !opc->se ) {
1209                                 opc->se = entry_dup( e );
1210                                 opc->se->e_private = get_mutexint();
1211                         }
1212                         e = opc->se;
1213                 }
1214         }
1215
1216         if ( saveit || op->o_tag == LDAP_REQ_ADD ) {
1217                 ber_dupbv_x( &opc->sdn, &e->e_name, op->o_tmpmemctx );
1218                 ber_dupbv_x( &opc->sndn, &e->e_nname, op->o_tmpmemctx );
1219                 opc->sreference = is_entry_referral( e );
1220                 a = attr_find( e->e_attrs, slap_schema.si_ad_entryUUID );
1221                 if ( a )
1222                         ber_dupbv_x( &opc->suuid, &a->a_nvals[0], op->o_tmpmemctx );
1223         } else if ( op->o_tag == LDAP_REQ_MODRDN && !saveit ) {
1224                 op->o_tmpfree( opc->sndn.bv_val, op->o_tmpmemctx );
1225                 op->o_tmpfree( opc->sdn.bv_val, op->o_tmpmemctx );
1226                 ber_dupbv_x( &opc->sdn, &e->e_name, op->o_tmpmemctx );
1227                 ber_dupbv_x( &opc->sndn, &e->e_nname, op->o_tmpmemctx );
1228         }
1229
1230         ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
1231         for (ss = si->si_ops, sprev = (syncops *)&si->si_ops; ss;
1232                 sprev = ss, ss=snext)
1233         {
1234                 Operation op2;
1235                 Opheader oh;
1236                 syncmatches *sm;
1237                 int found = 0;
1238
1239                 snext = ss->s_next;
1240                 if ( ss->s_op->o_abandon )
1241                         continue;
1242
1243                 /* Don't send ops back to the originator */
1244                 if ( opc->osid > 0 && opc->osid == ss->s_sid ) {
1245                         Debug( LDAP_DEBUG_SYNC, "syncprov_matchops: skipping original sid %03x\n",
1246                                 opc->osid, 0, 0 );
1247                         continue;
1248                 }
1249
1250                 /* Don't send ops back to the messenger */
1251                 if ( opc->rsid > 0 && opc->rsid == ss->s_sid ) {
1252                         Debug( LDAP_DEBUG_SYNC, "syncprov_matchops: skipping relayed sid %03x\n",
1253                                 opc->rsid, 0, 0 );
1254                         continue;
1255                 }
1256
1257                 /* validate base */
1258                 fc.fss = ss;
1259                 fc.fbase = 0;
1260                 fc.fscope = 0;
1261
1262                 /* If the base of the search is missing, signal a refresh */
1263                 rc = syncprov_findbase( op, &fc );
1264                 if ( rc != LDAP_SUCCESS ) {
1265                         SlapReply rs = {REP_RESULT};
1266                         send_ldap_error( ss->s_op, &rs, LDAP_SYNC_REFRESH_REQUIRED,
1267                                 "search base has changed" );
1268                         sprev->s_next = snext;
1269                         syncprov_drop_psearch( ss, 1 );
1270                         ss = sprev;
1271                         continue;
1272                 }
1273
1274                 /* If we're sending results now, look for this op in old matches */
1275                 if ( !saveit ) {
1276                         syncmatches *old;
1277
1278                         /* Did we modify the search base? */
1279                         if ( dn_match( &op->o_req_ndn, &ss->s_base )) {
1280                                 ldap_pvt_thread_mutex_lock( &ss->s_mutex );
1281                                 ss->s_flags |= PS_WROTE_BASE;
1282                                 ldap_pvt_thread_mutex_unlock( &ss->s_mutex );
1283                         }
1284
1285                         for ( sm=opc->smatches, old=(syncmatches *)&opc->smatches; sm;
1286                                 old=sm, sm=sm->sm_next ) {
1287                                 if ( sm->sm_op == ss ) {
1288                                         found = 1;
1289                                         old->sm_next = sm->sm_next;
1290                                         op->o_tmpfree( sm, op->o_tmpmemctx );
1291                                         break;
1292                                 }
1293                         }
1294                 }
1295
1296                 if ( fc.fscope ) {
1297                         ldap_pvt_thread_mutex_lock( &ss->s_mutex );
1298                         op2 = *ss->s_op;
1299                         oh = *op->o_hdr;
1300                         oh.oh_conn = ss->s_op->o_conn;
1301                         oh.oh_connid = ss->s_op->o_connid;
1302                         op2.o_bd = op->o_bd->bd_self;
1303                         op2.o_hdr = &oh;
1304                         op2.o_extra = op->o_extra;
1305                         op2.o_callback = NULL;
1306                         if (ss->s_flags & PS_FIX_FILTER) {
1307                                 /* Skip the AND/GE clause that we stuck on in front. We
1308                                    would lose deletes/mods that happen during the refresh
1309                                    phase otherwise (ITS#6555) */
1310                                 op2.ors_filter = ss->s_op->ors_filter->f_and->f_next;
1311                         }
1312                         ldap_pvt_thread_mutex_unlock( &ss->s_mutex );
1313                         rc = test_filter( &op2, e, op2.ors_filter );
1314                 }
1315
1316                 Debug( LDAP_DEBUG_TRACE, "syncprov_matchops: sid %03x fscope %d rc %d\n",
1317                         ss->s_sid, fc.fscope, rc );
1318
1319                 /* check if current o_req_dn is in scope and matches filter */
1320                 if ( fc.fscope && rc == LDAP_COMPARE_TRUE ) {
1321                         if ( saveit ) {
1322                                 sm = op->o_tmpalloc( sizeof(syncmatches), op->o_tmpmemctx );
1323                                 sm->sm_next = opc->smatches;
1324                                 sm->sm_op = ss;
1325                                 ldap_pvt_thread_mutex_lock( &ss->s_mutex );
1326                                 ++ss->s_inuse;
1327                                 ldap_pvt_thread_mutex_unlock( &ss->s_mutex );
1328                                 opc->smatches = sm;
1329                         } else {
1330                                 /* if found send UPDATE else send ADD */
1331                                 syncprov_qresp( opc, ss,
1332                                         found ? LDAP_SYNC_MODIFY : LDAP_SYNC_ADD );
1333                         }
1334                 } else if ( !saveit && found ) {
1335                         /* send DELETE */
1336                         syncprov_qresp( opc, ss, LDAP_SYNC_DELETE );
1337                 } else if ( !saveit ) {
1338                         syncprov_qresp( opc, ss, LDAP_SYNC_NEW_COOKIE );
1339                 }
1340                 if ( !saveit && found ) {
1341                         /* Decrement s_inuse, was incremented when called
1342                          * with saveit == TRUE
1343                          */
1344                         syncprov_free_syncop( ss );
1345                 }
1346         }
1347         ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
1348
1349         if ( op->o_tag != LDAP_REQ_ADD && e ) {
1350                 if ( !SLAP_ISOVERLAY( op->o_bd )) {
1351                         op->o_bd = &db;
1352                 }
1353                 if ( saveit )
1354                         overlay_entry_release_ov( op, e, 0, on );
1355                 op->o_bd = b0;
1356         }
1357         if ( opc->se && !saveit ) {
1358                 if ( !dec_mutexint( opc->se->e_private )) {
1359                         opc->se->e_private = NULL;
1360                         entry_free( opc->se );
1361                         opc->se = NULL;
1362                 }
1363         }
1364         if ( freefdn ) {
1365                 op->o_tmpfree( fc.fdn->bv_val, op->o_tmpmemctx );
1366         }
1367         op->o_bd = b0;
1368 }
1369
1370 static int
1371 syncprov_op_cleanup( Operation *op, SlapReply *rs )
1372 {
1373         slap_callback *cb = op->o_callback;
1374         opcookie *opc = cb->sc_private;
1375         slap_overinst *on = opc->son;
1376         syncprov_info_t         *si = on->on_bi.bi_private;
1377         syncmatches *sm, *snext;
1378         modtarget *mt;
1379
1380         ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
1381         if ( si->si_active )
1382                 si->si_active--;
1383         ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
1384
1385         for (sm = opc->smatches; sm; sm=snext) {
1386                 snext = sm->sm_next;
1387                 syncprov_free_syncop( sm->sm_op );
1388                 op->o_tmpfree( sm, op->o_tmpmemctx );
1389         }
1390
1391         /* Remove op from lock table */
1392         mt = opc->smt;
1393         if ( mt ) {
1394                 ldap_pvt_thread_mutex_lock( &mt->mt_mutex );
1395                 mt->mt_mods = mt->mt_mods->mi_next;
1396                 /* If there are more, promote the next one */
1397                 if ( mt->mt_mods ) {
1398                         mt->mt_op = mt->mt_mods->mi_op;
1399                         ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
1400                 } else {
1401                         ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
1402                         ldap_pvt_thread_mutex_lock( &si->si_mods_mutex );
1403                         avl_delete( &si->si_mods, mt, sp_avl_cmp );
1404                         ldap_pvt_thread_mutex_unlock( &si->si_mods_mutex );
1405                         ldap_pvt_thread_mutex_destroy( &mt->mt_mutex );
1406                         ch_free( mt );
1407                 }
1408         }
1409         if ( !BER_BVISNULL( &opc->suuid ))
1410                 op->o_tmpfree( opc->suuid.bv_val, op->o_tmpmemctx );
1411         if ( !BER_BVISNULL( &opc->sndn ))
1412                 op->o_tmpfree( opc->sndn.bv_val, op->o_tmpmemctx );
1413         if ( !BER_BVISNULL( &opc->sdn ))
1414                 op->o_tmpfree( opc->sdn.bv_val, op->o_tmpmemctx );
1415         op->o_callback = cb->sc_next;
1416         op->o_tmpfree(cb, op->o_tmpmemctx);
1417
1418         return 0;
1419 }
1420
1421 static void
1422 syncprov_checkpoint( Operation *op, slap_overinst *on )
1423 {
1424         syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
1425         Modifications mod;
1426         Operation opm;
1427         SlapReply rsm = {REP_RESULT};
1428         slap_callback cb = {0};
1429         BackendDB be;
1430         BackendInfo *bi;
1431
1432 #ifdef CHECK_CSN
1433         Syntax *syn = slap_schema.si_ad_contextCSN->ad_type->sat_syntax;
1434
1435         int i;
1436         for ( i=0; i<si->si_numcsns; i++ ) {
1437                 assert( !syn->ssyn_validate( syn, si->si_ctxcsn+i ));
1438         }
1439 #endif
1440         mod.sml_numvals = si->si_numcsns;
1441         mod.sml_values = si->si_ctxcsn;
1442         mod.sml_nvalues = NULL;
1443         mod.sml_desc = slap_schema.si_ad_contextCSN;
1444         mod.sml_op = LDAP_MOD_REPLACE;
1445         mod.sml_flags = SLAP_MOD_INTERNAL;
1446         mod.sml_next = NULL;
1447
1448         cb.sc_response = slap_null_cb;
1449         opm = *op;
1450         opm.o_tag = LDAP_REQ_MODIFY;
1451         opm.o_callback = &cb;
1452         opm.orm_modlist = &mod;
1453         opm.orm_no_opattrs = 1;
1454         if ( SLAP_GLUE_SUBORDINATE( op->o_bd )) {
1455                 be = *on->on_info->oi_origdb;
1456                 opm.o_bd = &be;
1457         }
1458         opm.o_req_dn = si->si_contextdn;
1459         opm.o_req_ndn = si->si_contextdn;
1460         bi = opm.o_bd->bd_info;
1461         opm.o_bd->bd_info = on->on_info->oi_orig;
1462         opm.o_managedsait = SLAP_CONTROL_NONCRITICAL;
1463         opm.o_no_schema_check = 1;
1464         opm.o_bd->be_modify( &opm, &rsm );
1465
1466         if ( rsm.sr_err == LDAP_NO_SUCH_OBJECT &&
1467                 SLAP_SYNC_SUBENTRY( opm.o_bd )) {
1468                 const char      *text;
1469                 char txtbuf[SLAP_TEXT_BUFLEN];
1470                 size_t textlen = sizeof txtbuf;
1471                 Entry *e = slap_create_context_csn_entry( opm.o_bd, NULL );
1472                 rs_reinit( &rsm, REP_RESULT );
1473                 slap_mods2entry( &mod, &e, 0, 1, &text, txtbuf, textlen);
1474                 opm.ora_e = e;
1475                 opm.o_bd->be_add( &opm, &rsm );
1476                 if ( e == opm.ora_e )
1477                         be_entry_release_w( &opm, opm.ora_e );
1478         }
1479         opm.o_bd->bd_info = bi;
1480
1481         if ( mod.sml_next != NULL ) {
1482                 slap_mods_free( mod.sml_next, 1 );
1483         }
1484 #ifdef CHECK_CSN
1485         for ( i=0; i<si->si_numcsns; i++ ) {
1486                 assert( !syn->ssyn_validate( syn, si->si_ctxcsn+i ));
1487         }
1488 #endif
1489 }
1490
1491 static void
1492 syncprov_add_slog( Operation *op )
1493 {
1494         opcookie *opc = op->o_callback->sc_private;
1495         slap_overinst *on = opc->son;
1496         syncprov_info_t         *si = on->on_bi.bi_private;
1497         sessionlog *sl;
1498         slog_entry *se;
1499
1500         sl = si->si_logs;
1501         {
1502                 if ( BER_BVISEMPTY( &op->o_csn ) ) {
1503                         /* During the syncrepl refresh phase we can receive operations
1504                          * without a csn.  We cannot reliably determine the consumers
1505                          * state with respect to such operations, so we ignore them and
1506                          * wipe out anything in the log if we see them.
1507                          */
1508                         ldap_pvt_thread_mutex_lock( &sl->sl_mutex );
1509                         while ( se = sl->sl_head ) {
1510                                 sl->sl_head = se->se_next;
1511                                 ch_free( se );
1512                         }
1513                         sl->sl_tail = NULL;
1514                         sl->sl_num = 0;
1515                         ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
1516                         return;
1517                 }
1518
1519                 /* Allocate a record. UUIDs are not NUL-terminated. */
1520                 se = ch_malloc( sizeof( slog_entry ) + opc->suuid.bv_len +
1521                         op->o_csn.bv_len + 1 );
1522                 se->se_next = NULL;
1523                 se->se_tag = op->o_tag;
1524
1525                 se->se_uuid.bv_val = (char *)(&se[1]);
1526                 AC_MEMCPY( se->se_uuid.bv_val, opc->suuid.bv_val, opc->suuid.bv_len );
1527                 se->se_uuid.bv_len = opc->suuid.bv_len;
1528
1529                 se->se_csn.bv_val = se->se_uuid.bv_val + opc->suuid.bv_len;
1530                 AC_MEMCPY( se->se_csn.bv_val, op->o_csn.bv_val, op->o_csn.bv_len );
1531                 se->se_csn.bv_val[op->o_csn.bv_len] = '\0';
1532                 se->se_csn.bv_len = op->o_csn.bv_len;
1533                 se->se_sid = slap_parse_csn_sid( &se->se_csn );
1534
1535                 ldap_pvt_thread_mutex_lock( &sl->sl_mutex );
1536                 if ( sl->sl_head ) {
1537                         /* Keep the list in csn order. */
1538                         if ( ber_bvcmp( &sl->sl_tail->se_csn, &se->se_csn ) <= 0 ) {
1539                                 sl->sl_tail->se_next = se;
1540                                 sl->sl_tail = se;
1541                         } else {
1542                                 slog_entry **sep;
1543
1544                                 for ( sep = &sl->sl_head; *sep; sep = &(*sep)->se_next ) {
1545                                         if ( ber_bvcmp( &se->se_csn, &(*sep)->se_csn ) < 0 ) {
1546                                                 se->se_next = *sep;
1547                                                 *sep = se;
1548                                                 break;
1549                                         }
1550                                 }
1551                         }
1552                 } else {
1553                         sl->sl_head = se;
1554                         sl->sl_tail = se;
1555                 }
1556                 sl->sl_num++;
1557                 while ( sl->sl_num > sl->sl_size ) {
1558                         se = sl->sl_head;
1559                         sl->sl_head = se->se_next;
1560                         ch_free( se );
1561                         sl->sl_num--;
1562                 }
1563                 ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
1564         }
1565 }
1566
1567 /* Just set a flag if we found the matching entry */
1568 static int
1569 playlog_cb( Operation *op, SlapReply *rs )
1570 {
1571         if ( rs->sr_type == REP_SEARCH ) {
1572                 op->o_callback->sc_private = (void *)1;
1573         }
1574         return rs->sr_err;
1575 }
1576
1577 /* enter with sl->sl_mutex locked, release before returning */
1578 static void
1579 syncprov_playlog( Operation *op, SlapReply *rs, sessionlog *sl,
1580         sync_control *srs, BerVarray ctxcsn, int numcsns, int *sids )
1581 {
1582         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
1583         slog_entry *se;
1584         int i, j, ndel, num, nmods, mmods;
1585         char cbuf[LDAP_PVT_CSNSTR_BUFSIZE];
1586         BerVarray uuids;
1587         struct berval delcsn[2];
1588
1589         if ( !sl->sl_num ) {
1590                 ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
1591                 return;
1592         }
1593
1594         num = sl->sl_num;
1595         i = 0;
1596         nmods = 0;
1597
1598         uuids = op->o_tmpalloc( (num+1) * sizeof( struct berval ) +
1599                 num * UUID_LEN, op->o_tmpmemctx );
1600         uuids[0].bv_val = (char *)(uuids + num + 1);
1601
1602         delcsn[0].bv_len = 0;
1603         delcsn[0].bv_val = cbuf;
1604         BER_BVZERO(&delcsn[1]);
1605
1606         /* Make a copy of the relevant UUIDs. Put the Deletes up front
1607          * and everything else at the end. Do this first so we can
1608          * unlock the list mutex.
1609          */
1610         Debug( LDAP_DEBUG_SYNC, "srs csn %s\n",
1611                 srs->sr_state.ctxcsn[0].bv_val, 0, 0 );
1612         for ( se=sl->sl_head; se; se=se->se_next ) {
1613                 int k;
1614                 Debug( LDAP_DEBUG_SYNC, "log csn %s\n", se->se_csn.bv_val, 0, 0 );
1615                 ndel = 1;
1616                 for ( k=0; k<srs->sr_state.numcsns; k++ ) {
1617                         if ( se->se_sid == srs->sr_state.sids[k] ) {
1618                                 ndel = ber_bvcmp( &se->se_csn, &srs->sr_state.ctxcsn[k] );
1619                                 break;
1620                         }
1621                 }
1622                 if ( ndel <= 0 ) {
1623                         Debug( LDAP_DEBUG_SYNC, "cmp %d, too old\n", ndel, 0, 0 );
1624                         continue;
1625                 }
1626                 ndel = 0;
1627                 for ( k=0; k<numcsns; k++ ) {
1628                         if ( se->se_sid == sids[k] ) {
1629                                 ndel = ber_bvcmp( &se->se_csn, &ctxcsn[k] );
1630                                 break;
1631                         }
1632                 }
1633                 if ( ndel > 0 ) {
1634                         Debug( LDAP_DEBUG_SYNC, "cmp %d, too new\n", ndel, 0, 0 );
1635                         break;
1636                 }
1637                 if ( se->se_tag == LDAP_REQ_DELETE ) {
1638                         j = i;
1639                         i++;
1640                         AC_MEMCPY( cbuf, se->se_csn.bv_val, se->se_csn.bv_len );
1641                         delcsn[0].bv_len = se->se_csn.bv_len;
1642                         delcsn[0].bv_val[delcsn[0].bv_len] = '\0';
1643                 } else {
1644                         if ( se->se_tag == LDAP_REQ_ADD )
1645                                 continue;
1646                         nmods++;
1647                         j = num - nmods;
1648                 }
1649                 uuids[j].bv_val = uuids[0].bv_val + (j * UUID_LEN);
1650                 AC_MEMCPY(uuids[j].bv_val, se->se_uuid.bv_val, UUID_LEN);
1651                 uuids[j].bv_len = UUID_LEN;
1652         }
1653         ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
1654
1655         ndel = i;
1656
1657         /* Zero out unused slots */
1658         for ( i=ndel; i < num - nmods; i++ )
1659                 uuids[i].bv_len = 0;
1660
1661         /* Mods must be validated to see if they belong in this delete set.
1662          */
1663
1664         mmods = nmods;
1665         /* Strip any duplicates */
1666         for ( i=0; i<nmods; i++ ) {
1667                 for ( j=0; j<ndel; j++ ) {
1668                         if ( bvmatch( &uuids[j], &uuids[num - 1 - i] )) {
1669                                 uuids[num - 1 - i].bv_len = 0;
1670                                 mmods --;
1671                                 break;
1672                         }
1673                 }
1674                 if ( uuids[num - 1 - i].bv_len == 0 ) continue;
1675                 for ( j=0; j<i; j++ ) {
1676                         if ( bvmatch( &uuids[num - 1 - j], &uuids[num - 1 - i] )) {
1677                                 uuids[num - 1 - i].bv_len = 0;
1678                                 mmods --;
1679                                 break;
1680                         }
1681                 }
1682         }
1683
1684         if ( mmods ) {
1685                 Operation fop;
1686                 int rc;
1687                 Filter mf, af;
1688                 AttributeAssertion eq = ATTRIBUTEASSERTION_INIT;
1689                 slap_callback cb = {0};
1690
1691                 fop = *op;
1692
1693                 fop.o_sync_mode = 0;
1694                 fop.o_callback = &cb;
1695                 fop.ors_limit = NULL;
1696                 fop.ors_tlimit = SLAP_NO_LIMIT;
1697                 fop.ors_attrs = slap_anlist_all_attributes;
1698                 fop.ors_attrsonly = 0;
1699                 fop.o_managedsait = SLAP_CONTROL_CRITICAL;
1700
1701                 af.f_choice = LDAP_FILTER_AND;
1702                 af.f_next = NULL;
1703                 af.f_and = &mf;
1704                 mf.f_choice = LDAP_FILTER_EQUALITY;
1705                 mf.f_ava = &eq;
1706                 mf.f_av_desc = slap_schema.si_ad_entryUUID;
1707                 mf.f_next = fop.ors_filter;
1708
1709                 fop.ors_filter = &af;
1710
1711                 cb.sc_response = playlog_cb;
1712                 fop.o_bd->bd_info = (BackendInfo *)on->on_info;
1713
1714                 for ( i=ndel; i<num; i++ ) {
1715                   if ( uuids[i].bv_len != 0 ) {
1716                         SlapReply frs = { REP_RESULT };
1717
1718                         mf.f_av_value = uuids[i];
1719                         cb.sc_private = NULL;
1720                         fop.ors_slimit = 1;
1721                         rc = fop.o_bd->be_search( &fop, &frs );
1722
1723                         /* If entry was not found, add to delete list */
1724                         if ( !cb.sc_private ) {
1725                                 uuids[ndel++] = uuids[i];
1726                         }
1727                   }
1728                 }
1729                 fop.o_bd->bd_info = (BackendInfo *)on;
1730         }
1731         if ( ndel ) {
1732                 struct berval cookie;
1733
1734                 if ( delcsn[0].bv_len ) {
1735                         slap_compose_sync_cookie( op, &cookie, delcsn, srs->sr_state.rid,
1736                                 slap_serverID ? slap_serverID : -1 );
1737
1738                         Debug( LDAP_DEBUG_SYNC, "syncprov_playlog: cookie=%s\n", cookie.bv_val, 0, 0 );
1739                 }
1740
1741                 uuids[ndel].bv_val = NULL;
1742                 syncprov_sendinfo( op, rs, LDAP_TAG_SYNC_ID_SET,
1743                         delcsn[0].bv_len ? &cookie : NULL, 0, uuids, 1 );
1744                 if ( delcsn[0].bv_len ) {
1745                         op->o_tmpfree( cookie.bv_val, op->o_tmpmemctx );
1746                 }
1747         }
1748         op->o_tmpfree( uuids, op->o_tmpmemctx );
1749 }
1750
1751 static int
1752 syncprov_op_response( Operation *op, SlapReply *rs )
1753 {
1754         opcookie *opc = op->o_callback->sc_private;
1755         slap_overinst *on = opc->son;
1756         syncprov_info_t         *si = on->on_bi.bi_private;
1757         syncmatches *sm;
1758
1759         if ( rs->sr_err == LDAP_SUCCESS )
1760         {
1761                 struct berval maxcsn;
1762                 char cbuf[LDAP_PVT_CSNSTR_BUFSIZE];
1763                 int do_check = 0, have_psearches, foundit, csn_changed = 0;
1764
1765                 ldap_pvt_thread_mutex_lock( &si->si_resp_mutex );
1766
1767                 /* Update our context CSN */
1768                 cbuf[0] = '\0';
1769                 maxcsn.bv_val = cbuf;
1770                 maxcsn.bv_len = sizeof(cbuf);
1771                 ldap_pvt_thread_rdwr_wlock( &si->si_csn_rwlock );
1772
1773                 slap_get_commit_csn( op, &maxcsn, &foundit );
1774                 if ( BER_BVISEMPTY( &maxcsn ) && SLAP_GLUE_SUBORDINATE( op->o_bd )) {
1775                         /* syncrepl queues the CSN values in the db where
1776                          * it is configured , not where the changes are made.
1777                          * So look for a value in the glue db if we didn't
1778                          * find any in this db.
1779                          */
1780                         BackendDB *be = op->o_bd;
1781                         op->o_bd = select_backend( &be->be_nsuffix[0], 1);
1782                         maxcsn.bv_val = cbuf;
1783                         maxcsn.bv_len = sizeof(cbuf);
1784                         slap_get_commit_csn( op, &maxcsn, &foundit );
1785                         op->o_bd = be;
1786                 }
1787                 if ( !BER_BVISEMPTY( &maxcsn ) ) {
1788                         int i, sid;
1789 #ifdef CHECK_CSN
1790                         Syntax *syn = slap_schema.si_ad_contextCSN->ad_type->sat_syntax;
1791                         assert( !syn->ssyn_validate( syn, &maxcsn ));
1792 #endif
1793                         sid = slap_parse_csn_sid( &maxcsn );
1794                         for ( i=0; i<si->si_numcsns; i++ ) {
1795                                 if ( sid == si->si_sids[i] ) {
1796                                         if ( ber_bvcmp( &maxcsn, &si->si_ctxcsn[i] ) > 0 ) {
1797                                                 ber_bvreplace( &si->si_ctxcsn[i], &maxcsn );
1798                                                 csn_changed = 1;
1799                                         }
1800                                         break;
1801                                 }
1802                         }
1803                         /* It's a new SID for us */
1804                         if ( i == si->si_numcsns ) {
1805                                 value_add_one( &si->si_ctxcsn, &maxcsn );
1806                                 csn_changed = 1;
1807                                 si->si_numcsns++;
1808                                 si->si_sids = ch_realloc( si->si_sids, si->si_numcsns *
1809                                         sizeof(int));
1810                                 si->si_sids[i] = sid;
1811                         }
1812                 }
1813
1814                 /* Don't do any processing for consumer contextCSN updates */
1815                 if ( op->o_dont_replicate ) {
1816                         if ( op->o_tag == LDAP_REQ_MODIFY &&
1817                                 op->orm_modlist->sml_op == LDAP_MOD_REPLACE &&
1818                                 op->orm_modlist->sml_desc == slap_schema.si_ad_contextCSN ) {
1819                         /* Catch contextCSN updates from syncrepl. We have to look at
1820                          * all the attribute values, as there may be more than one csn
1821                          * that changed, and only one can be passed in the csn queue.
1822                          */
1823                         Modifications *mod = op->orm_modlist;
1824                         int i, j, sid;
1825
1826                         for ( i=0; i<mod->sml_numvals; i++ ) {
1827                                 sid = slap_parse_csn_sid( &mod->sml_values[i] );
1828                                 for ( j=0; j<si->si_numcsns; j++ ) {
1829                                         if ( sid == si->si_sids[j] ) {
1830                                                 if ( ber_bvcmp( &mod->sml_values[i], &si->si_ctxcsn[j] ) > 0 ) {
1831                                                         ber_bvreplace( &si->si_ctxcsn[j], &mod->sml_values[i] );
1832                                                         csn_changed = 1;
1833                                                 }
1834                                                 break;
1835                                         }
1836                                 }
1837
1838                                 if ( j == si->si_numcsns ) {
1839                                         value_add_one( &si->si_ctxcsn, &mod->sml_values[i] );
1840                                         si->si_numcsns++;
1841                                         si->si_sids = ch_realloc( si->si_sids, si->si_numcsns *
1842                                                 sizeof(int));
1843                                         si->si_sids[j] = sid;
1844                                         csn_changed = 1;
1845                                 }
1846                         }
1847                         if ( csn_changed )
1848                                 si->si_dirty = 0;
1849                         ldap_pvt_thread_rdwr_wunlock( &si->si_csn_rwlock );
1850
1851                         if ( csn_changed ) {
1852                                 syncops *ss;
1853                                 ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
1854                                 for ( ss = si->si_ops; ss; ss = ss->s_next ) {
1855                                         if ( ss->s_op->o_abandon )
1856                                                 continue;
1857                                         /* Send the updated csn to all syncrepl consumers,
1858                                          * including the server from which it originated.
1859                                          * The syncrepl consumer and syncprov provider on
1860                                          * the originating server may be configured to store
1861                                          * their csn values in different entries.
1862                                          */
1863                                         syncprov_qresp( opc, ss, LDAP_SYNC_NEW_COOKIE );
1864                                 }
1865                                 ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
1866                         }
1867                         } else {
1868                         ldap_pvt_thread_rdwr_wunlock( &si->si_csn_rwlock );
1869                         }
1870                         goto leave;
1871                 }
1872
1873                 si->si_numops++;
1874                 if ( si->si_chkops || si->si_chktime ) {
1875                         /* Never checkpoint adding the context entry,
1876                          * it will deadlock
1877                          */
1878                         if ( op->o_tag != LDAP_REQ_ADD ||
1879                                 !dn_match( &op->o_req_ndn, &si->si_contextdn )) {
1880                                 if ( si->si_chkops && si->si_numops >= si->si_chkops ) {
1881                                         do_check = 1;
1882                                         si->si_numops = 0;
1883                                 }
1884                                 if ( si->si_chktime &&
1885                                         (op->o_time - si->si_chklast >= si->si_chktime )) {
1886                                         if ( si->si_chklast ) {
1887                                                 do_check = 1;
1888                                                 si->si_chklast = op->o_time;
1889                                         } else {
1890                                                 si->si_chklast = 1;
1891                                         }
1892                                 }
1893                         }
1894                 }
1895                 si->si_dirty = !csn_changed;
1896                 ldap_pvt_thread_rdwr_wunlock( &si->si_csn_rwlock );
1897
1898                 if ( do_check ) {
1899                         ldap_pvt_thread_rdwr_rlock( &si->si_csn_rwlock );
1900                         syncprov_checkpoint( op, on );
1901                         ldap_pvt_thread_rdwr_runlock( &si->si_csn_rwlock );
1902                 }
1903
1904                 /* only update consumer ctx if this is a newer csn */
1905                 if ( csn_changed ) {
1906                         opc->sctxcsn = maxcsn;
1907                 }
1908
1909                 /* Handle any persistent searches */
1910                 ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
1911                 have_psearches = ( si->si_ops != NULL );
1912                 ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
1913                 if ( have_psearches ) {
1914                         switch(op->o_tag) {
1915                         case LDAP_REQ_ADD:
1916                         case LDAP_REQ_MODIFY:
1917                         case LDAP_REQ_MODRDN:
1918                         case LDAP_REQ_EXTENDED:
1919                                 syncprov_matchops( op, opc, 0 );
1920                                 break;
1921                         case LDAP_REQ_DELETE:
1922                                 /* for each match in opc->smatches:
1923                                  *   send DELETE msg
1924                                  */
1925                                 for ( sm = opc->smatches; sm; sm=sm->sm_next ) {
1926                                         if ( sm->sm_op->s_op->o_abandon )
1927                                                 continue;
1928                                         syncprov_qresp( opc, sm->sm_op, LDAP_SYNC_DELETE );
1929                                 }
1930                                 break;
1931                         }
1932                 }
1933
1934                 /* Add any log records */
1935                 if ( si->si_logs ) {
1936                         syncprov_add_slog( op );
1937                 }
1938 leave:          ldap_pvt_thread_mutex_unlock( &si->si_resp_mutex );
1939         }
1940         return SLAP_CB_CONTINUE;
1941 }
1942
1943 /* We don't use a subentry to store the context CSN any more.
1944  * We expose the current context CSN as an operational attribute
1945  * of the suffix entry.
1946  */
1947 static int
1948 syncprov_op_compare( Operation *op, SlapReply *rs )
1949 {
1950         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
1951         syncprov_info_t         *si = on->on_bi.bi_private;
1952         int rc = SLAP_CB_CONTINUE;
1953
1954         if ( dn_match( &op->o_req_ndn, &si->si_contextdn ) &&
1955                 op->oq_compare.rs_ava->aa_desc == slap_schema.si_ad_contextCSN )
1956         {
1957                 Entry e = {0};
1958                 Attribute a = {0};
1959
1960                 e.e_name = si->si_contextdn;
1961                 e.e_nname = si->si_contextdn;
1962                 e.e_attrs = &a;
1963
1964                 a.a_desc = slap_schema.si_ad_contextCSN;
1965
1966                 ldap_pvt_thread_rdwr_rlock( &si->si_csn_rwlock );
1967
1968                 a.a_vals = si->si_ctxcsn;
1969                 a.a_nvals = a.a_vals;
1970                 a.a_numvals = si->si_numcsns;
1971
1972                 rs->sr_err = access_allowed( op, &e, op->oq_compare.rs_ava->aa_desc,
1973                         &op->oq_compare.rs_ava->aa_value, ACL_COMPARE, NULL );
1974                 if ( ! rs->sr_err ) {
1975                         rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
1976                         goto return_results;
1977                 }
1978
1979                 if ( get_assert( op ) &&
1980                         ( test_filter( op, &e, get_assertion( op ) ) != LDAP_COMPARE_TRUE ) )
1981                 {
1982                         rs->sr_err = LDAP_ASSERTION_FAILED;
1983                         goto return_results;
1984                 }
1985
1986
1987                 rs->sr_err = LDAP_COMPARE_FALSE;
1988
1989                 if ( attr_valfind( &a,
1990                         SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
1991                                 SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
1992                                 &op->oq_compare.rs_ava->aa_value, NULL, op->o_tmpmemctx ) == 0 )
1993                 {
1994                         rs->sr_err = LDAP_COMPARE_TRUE;
1995                 }
1996
1997 return_results:;
1998
1999                 ldap_pvt_thread_rdwr_runlock( &si->si_csn_rwlock );
2000
2001                 send_ldap_result( op, rs );
2002
2003                 if( rs->sr_err == LDAP_COMPARE_FALSE || rs->sr_err == LDAP_COMPARE_TRUE ) {
2004                         rs->sr_err = LDAP_SUCCESS;
2005                 }
2006                 rc = rs->sr_err;
2007         }
2008
2009         return rc;
2010 }
2011
2012 static int
2013 syncprov_op_mod( Operation *op, SlapReply *rs )
2014 {
2015         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
2016         syncprov_info_t         *si = on->on_bi.bi_private;
2017         slap_callback *cb;
2018         opcookie *opc;
2019         int have_psearches, cbsize;
2020
2021         ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
2022         have_psearches = ( si->si_ops != NULL );
2023         si->si_active++;
2024         ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
2025
2026         cbsize = sizeof(slap_callback) + sizeof(opcookie) +
2027                 (have_psearches ? sizeof(modinst) : 0 );
2028
2029         cb = op->o_tmpcalloc(1, cbsize, op->o_tmpmemctx);
2030         opc = (opcookie *)(cb+1);
2031         opc->son = on;
2032         cb->sc_response = syncprov_op_response;
2033         cb->sc_cleanup = syncprov_op_cleanup;
2034         cb->sc_private = opc;
2035         cb->sc_next = op->o_callback;
2036         op->o_callback = cb;
2037
2038         opc->osid = -1;
2039         opc->rsid = -1;
2040         if ( op->o_csn.bv_val ) {
2041                 opc->osid = slap_parse_csn_sid( &op->o_csn );
2042         }
2043         if ( op->o_controls ) {
2044                 struct sync_cookie *scook =
2045                 op->o_controls[slap_cids.sc_LDAPsync];
2046                 if ( scook )
2047                         opc->rsid = scook->sid;
2048         }
2049
2050         /* If there are active persistent searches, lock this operation.
2051          * See seqmod.c for the locking logic on its own.
2052          */
2053         if ( have_psearches ) {
2054                 modtarget *mt, mtdummy;
2055                 modinst *mi;
2056
2057                 mi = (modinst *)(opc+1);
2058                 mi->mi_op = op;
2059
2060                 /* See if we're already modifying this entry... */
2061                 mtdummy.mt_op = op;
2062                 ldap_pvt_thread_mutex_lock( &si->si_mods_mutex );
2063                 mt = avl_find( si->si_mods, &mtdummy, sp_avl_cmp );
2064                 if ( mt ) {
2065                         ldap_pvt_thread_mutex_lock( &mt->mt_mutex );
2066                         if ( mt->mt_mods == NULL ) {
2067                                 /* Cannot reuse this mt, as another thread is about
2068                                  * to release it in syncprov_op_cleanup.
2069                                  */
2070                                 ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
2071                                 mt = NULL;
2072                         }
2073                 }
2074                 if ( mt ) {
2075                         ldap_pvt_thread_mutex_unlock( &si->si_mods_mutex );
2076                         mt->mt_tail->mi_next = mi;
2077                         mt->mt_tail = mi;
2078                         /* wait for this op to get to head of list */
2079                         while ( mt->mt_mods != mi ) {
2080                                 ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
2081                                 /* FIXME: if dynamic config can delete overlays or
2082                                  * databases we'll have to check for cleanup here.
2083                                  * Currently it's not an issue because there are
2084                                  * no dynamic config deletes...
2085                                  */
2086                                 if ( slapd_shutdown )
2087                                         return SLAPD_ABANDON;
2088
2089                                 if ( !ldap_pvt_thread_pool_pausecheck( &connection_pool ))
2090                                         ldap_pvt_thread_yield();
2091                                 ldap_pvt_thread_mutex_lock( &mt->mt_mutex );
2092
2093                                 /* clean up if the caller is giving up */
2094                                 if ( op->o_abandon ) {
2095                                         modinst *m2;
2096                                         for ( m2 = mt->mt_mods; m2->mi_next != mi;
2097                                                 m2 = m2->mi_next );
2098                                         m2->mi_next = mi->mi_next;
2099                                         if ( mt->mt_tail == mi ) mt->mt_tail = m2;
2100                                         op->o_tmpfree( cb, op->o_tmpmemctx );
2101                                         ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
2102                                         return SLAPD_ABANDON;
2103                                 }
2104                         }
2105                         ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
2106                 } else {
2107                         /* Record that we're modifying this entry now */
2108                         mt = ch_malloc( sizeof(modtarget) );
2109                         mt->mt_mods = mi;
2110                         mt->mt_tail = mi;
2111                         mt->mt_op = mi->mi_op;
2112                         ldap_pvt_thread_mutex_init( &mt->mt_mutex );
2113                         avl_insert( &si->si_mods, mt, sp_avl_cmp, avl_dup_error );
2114                         ldap_pvt_thread_mutex_unlock( &si->si_mods_mutex );
2115                 }
2116                 opc->smt = mt;
2117         }
2118
2119         if (( have_psearches || si->si_logs ) && op->o_tag != LDAP_REQ_ADD )
2120                 syncprov_matchops( op, opc, 1 );
2121
2122         return SLAP_CB_CONTINUE;
2123 }
2124
2125 static int
2126 syncprov_op_extended( Operation *op, SlapReply *rs )
2127 {
2128         if ( exop_is_write( op ))
2129                 return syncprov_op_mod( op, rs );
2130
2131         return SLAP_CB_CONTINUE;
2132 }
2133
2134 typedef struct searchstate {
2135         slap_overinst *ss_on;
2136         syncops *ss_so;
2137         BerVarray ss_ctxcsn;
2138         int *ss_sids;
2139         int ss_numcsns;
2140 #define SS_PRESENT      0x01
2141 #define SS_CHANGED      0x02
2142         int ss_flags;
2143 } searchstate;
2144
2145 static int
2146 syncprov_search_cleanup( Operation *op, SlapReply *rs )
2147 {
2148         if ( rs->sr_ctrls ) {
2149                 op->o_tmpfree( rs->sr_ctrls[0], op->o_tmpmemctx );
2150                 op->o_tmpfree( rs->sr_ctrls, op->o_tmpmemctx );
2151                 rs->sr_ctrls = NULL;
2152         }
2153         return 0;
2154 }
2155
2156 typedef struct SyncOperationBuffer {
2157         Operation               sob_op;
2158         Opheader                sob_hdr;
2159         OpExtra                 sob_oe;
2160         AttributeName   sob_extra;      /* not always present */
2161         /* Further data allocated here */
2162 } SyncOperationBuffer;
2163
2164 static void
2165 syncprov_detach_op( Operation *op, syncops *so, slap_overinst *on )
2166 {
2167         SyncOperationBuffer *sopbuf2;
2168         Operation *op2;
2169         int i, alen = 0;
2170         size_t size;
2171         char *ptr;
2172         GroupAssertion *g1, *g2;
2173
2174         /* count the search attrs */
2175         for (i=0; op->ors_attrs && !BER_BVISNULL( &op->ors_attrs[i].an_name ); i++) {
2176                 alen += op->ors_attrs[i].an_name.bv_len + 1;
2177         }
2178         /* Make a new copy of the operation */
2179         size = offsetof( SyncOperationBuffer, sob_extra ) +
2180                 (i ? ( (i+1) * sizeof(AttributeName) + alen) : 0) +
2181                 op->o_req_dn.bv_len + 1 +
2182                 op->o_req_ndn.bv_len + 1 +
2183                 op->o_ndn.bv_len + 1 +
2184                 so->s_filterstr.bv_len + 1;
2185         sopbuf2 = ch_calloc( 1, size );
2186         op2 = &sopbuf2->sob_op;
2187         op2->o_hdr = &sopbuf2->sob_hdr;
2188         LDAP_SLIST_FIRST(&op2->o_extra) = &sopbuf2->sob_oe;
2189
2190         /* Copy the fields we care about explicitly, leave the rest alone */
2191         *op2->o_hdr = *op->o_hdr;
2192         op2->o_tag = op->o_tag;
2193         op2->o_time = op->o_time;
2194         op2->o_bd = on->on_info->oi_origdb;
2195         op2->o_request = op->o_request;
2196         op2->o_managedsait = op->o_managedsait;
2197         LDAP_SLIST_FIRST(&op2->o_extra)->oe_key = on;
2198         LDAP_SLIST_NEXT(LDAP_SLIST_FIRST(&op2->o_extra), oe_next) = NULL;
2199
2200         ptr = (char *) sopbuf2 + offsetof( SyncOperationBuffer, sob_extra );
2201         if ( i ) {
2202                 op2->ors_attrs = (AttributeName *) ptr;
2203                 ptr = (char *) &op2->ors_attrs[i+1];
2204                 for (i=0; !BER_BVISNULL( &op->ors_attrs[i].an_name ); i++) {
2205                         op2->ors_attrs[i] = op->ors_attrs[i];
2206                         op2->ors_attrs[i].an_name.bv_val = ptr;
2207                         ptr = lutil_strcopy( ptr, op->ors_attrs[i].an_name.bv_val ) + 1;
2208                 }
2209                 BER_BVZERO( &op2->ors_attrs[i].an_name );
2210         }
2211
2212         op2->o_authz = op->o_authz;
2213         op2->o_ndn.bv_val = ptr;
2214         ptr = lutil_strcopy(ptr, op->o_ndn.bv_val) + 1;
2215         op2->o_dn = op2->o_ndn;
2216         op2->o_req_dn.bv_len = op->o_req_dn.bv_len;
2217         op2->o_req_dn.bv_val = ptr;
2218         ptr = lutil_strcopy(ptr, op->o_req_dn.bv_val) + 1;
2219         op2->o_req_ndn.bv_len = op->o_req_ndn.bv_len;
2220         op2->o_req_ndn.bv_val = ptr;
2221         ptr = lutil_strcopy(ptr, op->o_req_ndn.bv_val) + 1;
2222         op2->ors_filterstr.bv_val = ptr;
2223         strcpy( ptr, so->s_filterstr.bv_val );
2224         op2->ors_filterstr.bv_len = so->s_filterstr.bv_len;
2225
2226         /* Skip the AND/GE clause that we stuck on in front */
2227         if ( so->s_flags & PS_FIX_FILTER ) {
2228                 op2->ors_filter = op->ors_filter->f_and->f_next;
2229                 so->s_flags ^= PS_FIX_FILTER;
2230         } else {
2231                 op2->ors_filter = op->ors_filter;
2232         }
2233         op2->ors_filter = filter_dup( op2->ors_filter, NULL );
2234         so->s_op = op2;
2235
2236         /* Copy any cached group ACLs individually */
2237         op2->o_groups = NULL;
2238         for ( g1=op->o_groups; g1; g1=g1->ga_next ) {
2239                 g2 = ch_malloc( sizeof(GroupAssertion) + g1->ga_len );
2240                 *g2 = *g1;
2241                 strcpy( g2->ga_ndn, g1->ga_ndn );
2242                 g2->ga_next = op2->o_groups;
2243                 op2->o_groups = g2;
2244         }
2245         /* Don't allow any further group caching */
2246         op2->o_do_not_cache = 1;
2247
2248         /* Add op2 to conn so abandon will find us */
2249         op->o_conn->c_n_ops_executing++;
2250         op->o_conn->c_n_ops_completed--;
2251         LDAP_STAILQ_INSERT_TAIL( &op->o_conn->c_ops, op2, o_next );
2252         so->s_flags |= PS_IS_DETACHED;
2253
2254         /* Prevent anyone else from trying to send a result for this op */
2255         op->o_abandon = 1;
2256 }
2257
2258 static int
2259 syncprov_search_response( Operation *op, SlapReply *rs )
2260 {
2261         searchstate *ss = op->o_callback->sc_private;
2262         slap_overinst *on = ss->ss_on;
2263         syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
2264         sync_control *srs = op->o_controls[slap_cids.sc_LDAPsync];
2265
2266         if ( rs->sr_type == REP_SEARCH || rs->sr_type == REP_SEARCHREF ) {
2267                 Attribute *a;
2268                 /* If we got a referral without a referral object, there's
2269                  * something missing that we cannot replicate. Just ignore it.
2270                  * The consumer will abort because we didn't send the expected
2271                  * control.
2272                  */
2273                 if ( !rs->sr_entry ) {
2274                         assert( rs->sr_entry != NULL );
2275                         Debug( LDAP_DEBUG_ANY, "bogus referral in context\n",0,0,0 );
2276                         return SLAP_CB_CONTINUE;
2277                 }
2278                 a = attr_find( rs->sr_entry->e_attrs, slap_schema.si_ad_entryCSN );
2279                 if ( a == NULL && rs->sr_operational_attrs != NULL ) {
2280                         a = attr_find( rs->sr_operational_attrs, slap_schema.si_ad_entryCSN );
2281                 }
2282                 if ( a ) {
2283                         int i, sid;
2284                         sid = slap_parse_csn_sid( &a->a_nvals[0] );
2285
2286                         /* Don't send changed entries back to the originator */
2287                         if ( sid == srs->sr_state.sid && srs->sr_state.numcsns ) {
2288                                 Debug( LDAP_DEBUG_SYNC,
2289                                         "Entry %s changed by peer, ignored\n",
2290                                         rs->sr_entry->e_name.bv_val, 0, 0 );
2291                                 return LDAP_SUCCESS;
2292                         }
2293
2294                         /* If not a persistent search */
2295                         if ( !ss->ss_so ) {
2296                                 /* Make sure entry is less than the snapshot'd contextCSN */
2297                                 for ( i=0; i<ss->ss_numcsns; i++ ) {
2298                                         if ( sid == ss->ss_sids[i] && ber_bvcmp( &a->a_nvals[0],
2299                                                 &ss->ss_ctxcsn[i] ) > 0 ) {
2300                                                 Debug( LDAP_DEBUG_SYNC,
2301                                                         "Entry %s CSN %s greater than snapshot %s\n",
2302                                                         rs->sr_entry->e_name.bv_val,
2303                                                         a->a_nvals[0].bv_val,
2304                                                         ss->ss_ctxcsn[i].bv_val );
2305                                                 return LDAP_SUCCESS;
2306                                         }
2307                                 }
2308                         }
2309
2310                         /* Don't send old entries twice */
2311                         if ( srs->sr_state.ctxcsn ) {
2312                                 for ( i=0; i<srs->sr_state.numcsns; i++ ) {
2313                                         if ( sid == srs->sr_state.sids[i] &&
2314                                                 ber_bvcmp( &a->a_nvals[0],
2315                                                         &srs->sr_state.ctxcsn[i] )<= 0 ) {
2316                                                 Debug( LDAP_DEBUG_SYNC,
2317                                                         "Entry %s CSN %s older or equal to ctx %s\n",
2318                                                         rs->sr_entry->e_name.bv_val,
2319                                                         a->a_nvals[0].bv_val,
2320                                                         srs->sr_state.ctxcsn[i].bv_val );
2321                                                 return LDAP_SUCCESS;
2322                                         }
2323                                 }
2324                         }
2325                 }
2326                 rs->sr_ctrls = op->o_tmpalloc( sizeof(LDAPControl *)*2,
2327                         op->o_tmpmemctx );
2328                 rs->sr_ctrls[1] = NULL;
2329                 /* If we're in delta-sync mode, always send a cookie */
2330                 if ( si->si_nopres && si->si_usehint && a ) {
2331                         struct berval cookie;
2332                         slap_compose_sync_cookie( op, &cookie, a->a_nvals, srs->sr_state.rid, slap_serverID ? slap_serverID : -1 );
2333                         rs->sr_err = syncprov_state_ctrl( op, rs, rs->sr_entry,
2334                                 LDAP_SYNC_ADD, rs->sr_ctrls, 0, 1, &cookie );
2335                 } else {
2336                         rs->sr_err = syncprov_state_ctrl( op, rs, rs->sr_entry,
2337                                 LDAP_SYNC_ADD, rs->sr_ctrls, 0, 0, NULL );
2338                 }
2339         } else if ( rs->sr_type == REP_RESULT && rs->sr_err == LDAP_SUCCESS ) {
2340                 struct berval cookie = BER_BVNULL;
2341
2342                 if ( ( ss->ss_flags & SS_CHANGED ) &&
2343                         ss->ss_ctxcsn && !BER_BVISNULL( &ss->ss_ctxcsn[0] )) {
2344                         slap_compose_sync_cookie( op, &cookie, ss->ss_ctxcsn,
2345                                 srs->sr_state.rid, slap_serverID ? slap_serverID : -1 );
2346
2347                         Debug( LDAP_DEBUG_SYNC, "syncprov_search_response: cookie=%s\n", cookie.bv_val, 0, 0 );
2348                 }
2349
2350                 /* Is this a regular refresh?
2351                  * Note: refresh never gets here if there were no changes
2352                  */
2353                 if ( !ss->ss_so ) {
2354                         rs->sr_ctrls = op->o_tmpalloc( sizeof(LDAPControl *)*2,
2355                                 op->o_tmpmemctx );
2356                         rs->sr_ctrls[1] = NULL;
2357                         rs->sr_err = syncprov_done_ctrl( op, rs, rs->sr_ctrls,
2358                                 0, 1, &cookie, ( ss->ss_flags & SS_PRESENT ) ?  LDAP_SYNC_REFRESH_PRESENTS :
2359                                         LDAP_SYNC_REFRESH_DELETES );
2360                         op->o_tmpfree( cookie.bv_val, op->o_tmpmemctx );
2361                 } else {
2362                 /* It's RefreshAndPersist, transition to Persist phase */
2363                         syncprov_sendinfo( op, rs, ( ss->ss_flags & SS_PRESENT ) ?
2364                                 LDAP_TAG_SYNC_REFRESH_PRESENT : LDAP_TAG_SYNC_REFRESH_DELETE,
2365                                 ( ss->ss_flags & SS_CHANGED ) ? &cookie : NULL,
2366                                 1, NULL, 0 );
2367                         if ( !BER_BVISNULL( &cookie ))
2368                                 op->o_tmpfree( cookie.bv_val, op->o_tmpmemctx );
2369
2370                         /* Detach this Op from frontend control */
2371                         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
2372
2373                         /* But not if this connection was closed along the way */
2374                         if ( op->o_abandon ) {
2375                                 ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
2376                                 /* syncprov_ab_cleanup will free this syncop */
2377                                 return SLAPD_ABANDON;
2378
2379                         } else {
2380                                 ldap_pvt_thread_mutex_lock( &ss->ss_so->s_mutex );
2381                                 /* Turn off the refreshing flag */
2382                                 ss->ss_so->s_flags ^= PS_IS_REFRESHING;
2383
2384                                 syncprov_detach_op( op, ss->ss_so, on );
2385
2386                                 ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
2387
2388                                 /* If there are queued responses, fire them off */
2389                                 if ( ss->ss_so->s_res )
2390                                         syncprov_qstart( ss->ss_so );
2391                                 ldap_pvt_thread_mutex_unlock( &ss->ss_so->s_mutex );
2392                         }
2393
2394                         return LDAP_SUCCESS;
2395                 }
2396         }
2397
2398         return SLAP_CB_CONTINUE;
2399 }
2400
2401 static int
2402 syncprov_op_search( Operation *op, SlapReply *rs )
2403 {
2404         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
2405         syncprov_info_t         *si = (syncprov_info_t *)on->on_bi.bi_private;
2406         slap_callback   *cb;
2407         int gotstate = 0, changed = 0, do_present = 0;
2408         syncops *sop = NULL;
2409         searchstate *ss;
2410         sync_control *srs;
2411         BerVarray ctxcsn;
2412         int i, *sids, numcsns;
2413         struct berval mincsn;
2414         int dirty = 0;
2415
2416         if ( !(op->o_sync_mode & SLAP_SYNC_REFRESH) ) return SLAP_CB_CONTINUE;
2417
2418         if ( op->ors_deref & LDAP_DEREF_SEARCHING ) {
2419                 send_ldap_error( op, rs, LDAP_PROTOCOL_ERROR, "illegal value for derefAliases" );
2420                 return rs->sr_err;
2421         }
2422
2423         srs = op->o_controls[slap_cids.sc_LDAPsync];
2424
2425         /* If this is a persistent search, set it up right away */
2426         if ( op->o_sync_mode & SLAP_SYNC_PERSIST ) {
2427                 syncops so = {0};
2428                 fbase_cookie fc;
2429                 opcookie opc;
2430                 slap_callback sc;
2431
2432                 fc.fss = &so;
2433                 fc.fbase = 0;
2434                 so.s_eid = NOID;
2435                 so.s_op = op;
2436                 so.s_flags = PS_IS_REFRESHING | PS_FIND_BASE;
2437                 /* syncprov_findbase expects to be called as a callback... */
2438                 sc.sc_private = &opc;
2439                 opc.son = on;
2440                 ldap_pvt_thread_mutex_init( &so.s_mutex );
2441                 cb = op->o_callback;
2442                 op->o_callback = &sc;
2443                 rs->sr_err = syncprov_findbase( op, &fc );
2444                 op->o_callback = cb;
2445                 ldap_pvt_thread_mutex_destroy( &so.s_mutex );
2446
2447                 if ( rs->sr_err != LDAP_SUCCESS ) {
2448                         send_ldap_result( op, rs );
2449                         return rs->sr_err;
2450                 }
2451                 sop = ch_malloc( sizeof( syncops ));
2452                 *sop = so;
2453                 ldap_pvt_thread_mutex_init( &sop->s_mutex );
2454                 sop->s_rid = srs->sr_state.rid;
2455                 sop->s_sid = srs->sr_state.sid;
2456                 sop->s_inuse = 1;
2457
2458                 ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
2459                 while ( si->si_active ) {
2460                         /* Wait for active mods to finish before proceeding, as they
2461                          * may already have inspected the si_ops list looking for
2462                          * consumers to replicate the change to.  Using the log
2463                          * doesn't help, as we may finish playing it before the
2464                          * active mods gets added to it.
2465                          */
2466                         ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
2467                         if ( slapd_shutdown )
2468                                 return SLAPD_ABANDON;
2469                         if ( !ldap_pvt_thread_pool_pausecheck( &connection_pool ))
2470                                 ldap_pvt_thread_yield();
2471                         ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
2472                 }
2473                 sop->s_next = si->si_ops;
2474                 si->si_ops = sop;
2475                 ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
2476         }
2477
2478         /* snapshot the ctxcsn */
2479         ldap_pvt_thread_rdwr_rlock( &si->si_csn_rwlock );
2480         numcsns = si->si_numcsns;
2481         if ( numcsns ) {
2482                 ber_bvarray_dup_x( &ctxcsn, si->si_ctxcsn, op->o_tmpmemctx );
2483                 sids = op->o_tmpalloc( numcsns * sizeof(int), op->o_tmpmemctx );
2484                 for ( i=0; i<numcsns; i++ )
2485                         sids[i] = si->si_sids[i];
2486         } else {
2487                 ctxcsn = NULL;
2488                 sids = NULL;
2489         }
2490         dirty = si->si_dirty;
2491         ldap_pvt_thread_rdwr_runlock( &si->si_csn_rwlock );
2492
2493         /* If we have a cookie, handle the PRESENT lookups */
2494         if ( srs->sr_state.ctxcsn ) {
2495                 sessionlog *sl;
2496                 int i, j;
2497
2498                 /* If we don't have any CSN of our own yet, pretend nothing
2499                  * has changed.
2500                  */
2501                 if ( !numcsns )
2502                         goto no_change;
2503
2504                 if ( !si->si_nopres )
2505                         do_present = SS_PRESENT;
2506
2507                 /* If there are SIDs we don't recognize in the cookie, drop them */
2508                 for (i=0; i<srs->sr_state.numcsns; ) {
2509                         for (j=0; j<numcsns; j++) {
2510                                 if ( srs->sr_state.sids[i] == sids[j] ) {
2511                                         break;
2512                                 }
2513                         }
2514                         /* not found */
2515                         if ( j == numcsns ) {
2516                                 struct berval tmp = srs->sr_state.ctxcsn[i];
2517                                 j = srs->sr_state.numcsns - 1;
2518                                 srs->sr_state.ctxcsn[i] = srs->sr_state.ctxcsn[j];
2519                                 tmp.bv_len = 0;
2520                                 srs->sr_state.ctxcsn[j] = tmp;
2521                                 srs->sr_state.numcsns = j;
2522                                 srs->sr_state.sids[i] = srs->sr_state.sids[j];
2523                                 continue;
2524                         }
2525                         i++;
2526                 }
2527
2528                 /* Find the smallest CSN */
2529                 mincsn = srs->sr_state.ctxcsn[0];
2530                 for ( i=1; i<srs->sr_state.numcsns; i++ ) {
2531                         if ( ber_bvcmp( &mincsn, &srs->sr_state.ctxcsn[i] ) > 0 )
2532                                 mincsn = srs->sr_state.ctxcsn[i];
2533                 }
2534
2535                 /* If nothing has changed, shortcut it */
2536                 if ( srs->sr_state.numcsns == numcsns ) {
2537                         int i, j, newer;
2538                         for ( i=0; i<srs->sr_state.numcsns; i++ ) {
2539                                 for ( j=0; j<numcsns; j++ ) {
2540                                         if ( srs->sr_state.sids[i] != sids[j] )
2541                                                 continue;
2542                                         newer = ber_bvcmp( &srs->sr_state.ctxcsn[i], &ctxcsn[j] );
2543                                         /* If our state is newer, tell consumer about changes */
2544                                         if ( newer < 0 )
2545                                                 changed = SS_CHANGED;
2546                                         else if ( newer > 0 ) {
2547                                         /* our state is older, complain to consumer */
2548                                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
2549                                                 rs->sr_text = "consumer state is newer than provider!";
2550 bailout:
2551                                                 if ( sop ) {
2552                                                         syncops **sp = &si->si_ops;
2553
2554                                                         ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
2555                                                         while ( *sp != sop )
2556                                                                 sp = &(*sp)->s_next;
2557                                                         *sp = sop->s_next;
2558                                                         ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
2559                                                         ch_free( sop );
2560                                                 }
2561                                                 rs->sr_ctrls = NULL;
2562                                                 send_ldap_result( op, rs );
2563                                                 return rs->sr_err;
2564                                         }
2565                                         break;
2566                                 }
2567                                 if ( changed )
2568                                         break;
2569                         }
2570                         if ( !changed && !dirty ) {
2571                                 do_present = 0;
2572 no_change:              if ( !(op->o_sync_mode & SLAP_SYNC_PERSIST) ) {
2573                                         LDAPControl     *ctrls[2];
2574
2575                                         ctrls[0] = NULL;
2576                                         ctrls[1] = NULL;
2577                                         syncprov_done_ctrl( op, rs, ctrls, 0, 0,
2578                                                 NULL, LDAP_SYNC_REFRESH_DELETES );
2579                                         rs->sr_ctrls = ctrls;
2580                                         rs->sr_err = LDAP_SUCCESS;
2581                                         send_ldap_result( op, rs );
2582                                         rs->sr_ctrls = NULL;
2583                                         return rs->sr_err;
2584                                 }
2585                                 goto shortcut;
2586                         }
2587                 } else {
2588                         /* consumer doesn't have the right number of CSNs */
2589                         changed = SS_CHANGED;
2590                 }
2591                 /* Do we have a sessionlog for this search? */
2592                 sl=si->si_logs;
2593                 if ( sl ) {
2594                         ldap_pvt_thread_mutex_lock( &sl->sl_mutex );
2595                         /* Are there any log entries, and is the consumer state
2596                          * present in the session log?
2597                          */
2598                         if ( sl->sl_num > 0 && ber_bvcmp( &mincsn, &sl->sl_head->se_csn ) >= 0 ) {
2599                                 do_present = 0;
2600                                 /* mutex is unlocked in playlog */
2601                                 syncprov_playlog( op, rs, sl, srs, ctxcsn, numcsns, sids );
2602                         } else {
2603                                 ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
2604                         }
2605                 }
2606                 /* Is the CSN still present in the database? */
2607                 if ( syncprov_findcsn( op, FIND_CSN ) != LDAP_SUCCESS ) {
2608                         /* No, so a reload is required */
2609                         /* the 2.2 consumer doesn't send this hint */
2610                         if ( si->si_usehint && srs->sr_rhint == 0 ) {
2611                                 if ( ctxcsn )
2612                                         ber_bvarray_free_x( ctxcsn, op->o_tmpmemctx );
2613                                 if ( sids )
2614                                         op->o_tmpfree( sids, op->o_tmpmemctx );
2615                                 rs->sr_err = LDAP_SYNC_REFRESH_REQUIRED;
2616                                 rs->sr_text = "sync cookie is stale";
2617                                 goto bailout;
2618                         }
2619                         if ( srs->sr_state.ctxcsn ) {
2620                                 ber_bvarray_free_x( srs->sr_state.ctxcsn, op->o_tmpmemctx );
2621                                 srs->sr_state.ctxcsn = NULL;
2622                         }
2623                         if ( srs->sr_state.sids ) {
2624                                 slap_sl_free( srs->sr_state.sids, op->o_tmpmemctx );
2625                                 srs->sr_state.sids = NULL;
2626                         }
2627                         srs->sr_state.numcsns = 0;
2628                 } else {
2629                         gotstate = 1;
2630                         /* If changed and doing Present lookup, send Present UUIDs */
2631                         if ( do_present && syncprov_findcsn( op, FIND_PRESENT ) !=
2632                                 LDAP_SUCCESS ) {
2633                                 if ( ctxcsn )
2634                                         ber_bvarray_free_x( ctxcsn, op->o_tmpmemctx );
2635                                 if ( sids )
2636                                         op->o_tmpfree( sids, op->o_tmpmemctx );
2637                                 goto bailout;
2638                         }
2639                 }
2640         } else {
2641                 /* No consumer state, assume something has changed */
2642                 changed = SS_CHANGED;
2643         }
2644
2645 shortcut:
2646         /* Append CSN range to search filter, save original filter
2647          * for persistent search evaluation
2648          */
2649         if ( sop ) {
2650                 sop->s_filterstr= op->ors_filterstr;
2651         }
2652
2653         /* If something changed, find the changes */
2654         if ( gotstate && ( changed || dirty ) ) {
2655                 Filter *fand, *fava;
2656
2657                 fand = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
2658                 fand->f_choice = LDAP_FILTER_AND;
2659                 fand->f_next = NULL;
2660                 fava = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
2661                 fand->f_and = fava;
2662                 fava->f_choice = LDAP_FILTER_GE;
2663                 fava->f_ava = op->o_tmpalloc( sizeof(AttributeAssertion), op->o_tmpmemctx );
2664                 fava->f_ava->aa_desc = slap_schema.si_ad_entryCSN;
2665 #ifdef LDAP_COMP_MATCH
2666                 fava->f_ava->aa_cf = NULL;
2667 #endif
2668                 ber_dupbv_x( &fava->f_ava->aa_value, &mincsn, op->o_tmpmemctx );
2669                 fava->f_next = op->ors_filter;
2670                 if ( sop )
2671                         ldap_pvt_thread_mutex_lock( &sop->s_mutex );
2672                 op->ors_filter = fand;
2673                 filter2bv_x( op, op->ors_filter, &op->ors_filterstr );
2674                 if ( sop ) {
2675                         sop->s_flags |= PS_FIX_FILTER;
2676                         ldap_pvt_thread_mutex_unlock( &sop->s_mutex );
2677                 }
2678         }
2679
2680         /* Let our callback add needed info to returned entries */
2681         cb = op->o_tmpcalloc(1, sizeof(slap_callback)+sizeof(searchstate), op->o_tmpmemctx);
2682         ss = (searchstate *)(cb+1);
2683         ss->ss_on = on;
2684         ss->ss_so = sop;
2685         ss->ss_flags = do_present | changed;
2686         ss->ss_ctxcsn = ctxcsn;
2687         ss->ss_numcsns = numcsns;
2688         ss->ss_sids = sids;
2689         cb->sc_response = syncprov_search_response;
2690         cb->sc_cleanup = syncprov_search_cleanup;
2691         cb->sc_private = ss;
2692         cb->sc_next = op->o_callback;
2693         op->o_callback = cb;
2694
2695         /* If this is a persistent search and no changes were reported during
2696          * the refresh phase, just invoke the response callback to transition
2697          * us into persist phase
2698          */
2699         if ( !changed && !dirty ) {
2700                 rs->sr_err = LDAP_SUCCESS;
2701                 rs->sr_nentries = 0;
2702                 send_ldap_result( op, rs );
2703                 return rs->sr_err;
2704         }
2705         return SLAP_CB_CONTINUE;
2706 }
2707
2708 static int
2709 syncprov_operational(
2710         Operation *op,
2711         SlapReply *rs )
2712 {
2713         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
2714         syncprov_info_t         *si = (syncprov_info_t *)on->on_bi.bi_private;
2715
2716         /* This prevents generating unnecessarily; frontend will strip
2717          * any statically stored copy.
2718          */
2719         if ( op->o_sync != SLAP_CONTROL_NONE )
2720                 return SLAP_CB_CONTINUE;
2721
2722         if ( rs->sr_entry &&
2723                 dn_match( &rs->sr_entry->e_nname, &si->si_contextdn )) {
2724
2725                 if ( SLAP_OPATTRS( rs->sr_attr_flags ) ||
2726                         ad_inlist( slap_schema.si_ad_contextCSN, rs->sr_attrs )) {
2727                         Attribute *a, **ap = NULL;
2728
2729                         for ( a=rs->sr_entry->e_attrs; a; a=a->a_next ) {
2730                                 if ( a->a_desc == slap_schema.si_ad_contextCSN )
2731                                         break;
2732                         }
2733
2734                         ldap_pvt_thread_rdwr_rlock( &si->si_csn_rwlock );
2735                         if ( si->si_ctxcsn ) {
2736                                 if ( !a ) {
2737                                         for ( ap = &rs->sr_operational_attrs; *ap;
2738                                                 ap=&(*ap)->a_next );
2739
2740                                         a = attr_alloc( slap_schema.si_ad_contextCSN );
2741                                         *ap = a;
2742                                 }
2743
2744                                 if ( !ap ) {
2745                                         if ( rs_ensure_entry_modifiable( op, rs, on )) {
2746                                                 a = attr_find( rs->sr_entry->e_attrs,
2747                                                         slap_schema.si_ad_contextCSN );
2748                                         }
2749                                         if ( a->a_nvals != a->a_vals ) {
2750                                                 ber_bvarray_free( a->a_nvals );
2751                                         }
2752                                         a->a_nvals = NULL;
2753                                         ber_bvarray_free( a->a_vals );
2754                                         a->a_vals = NULL;
2755                                         a->a_numvals = 0;
2756                                 }
2757                                 attr_valadd( a, si->si_ctxcsn, si->si_ctxcsn, si->si_numcsns );
2758                         }
2759                         ldap_pvt_thread_rdwr_runlock( &si->si_csn_rwlock );
2760                 }
2761         }
2762         return SLAP_CB_CONTINUE;
2763 }
2764
2765 enum {
2766         SP_CHKPT = 1,
2767         SP_SESSL,
2768         SP_NOPRES,
2769         SP_USEHINT
2770 };
2771
2772 static ConfigDriver sp_cf_gen;
2773
2774 static ConfigTable spcfg[] = {
2775         { "syncprov-checkpoint", "ops> <minutes", 3, 3, 0, ARG_MAGIC|SP_CHKPT,
2776                 sp_cf_gen, "( OLcfgOvAt:1.1 NAME 'olcSpCheckpoint' "
2777                         "DESC 'ContextCSN checkpoint interval in ops and minutes' "
2778                         "SYNTAX OMsDirectoryString SINGLE-VALUE )", NULL, NULL },
2779         { "syncprov-sessionlog", "ops", 2, 2, 0, ARG_INT|ARG_MAGIC|SP_SESSL,
2780                 sp_cf_gen, "( OLcfgOvAt:1.2 NAME 'olcSpSessionlog' "
2781                         "DESC 'Session log size in ops' "
2782                         "SYNTAX OMsInteger SINGLE-VALUE )", NULL, NULL },
2783         { "syncprov-nopresent", NULL, 2, 2, 0, ARG_ON_OFF|ARG_MAGIC|SP_NOPRES,
2784                 sp_cf_gen, "( OLcfgOvAt:1.3 NAME 'olcSpNoPresent' "
2785                         "DESC 'Omit Present phase processing' "
2786                         "SYNTAX OMsBoolean SINGLE-VALUE )", NULL, NULL },
2787         { "syncprov-reloadhint", NULL, 2, 2, 0, ARG_ON_OFF|ARG_MAGIC|SP_USEHINT,
2788                 sp_cf_gen, "( OLcfgOvAt:1.4 NAME 'olcSpReloadHint' "
2789                         "DESC 'Observe Reload Hint in Request control' "
2790                         "SYNTAX OMsBoolean SINGLE-VALUE )", NULL, NULL },
2791         { NULL, NULL, 0, 0, 0, ARG_IGNORED }
2792 };
2793
2794 static ConfigOCs spocs[] = {
2795         { "( OLcfgOvOc:1.1 "
2796                 "NAME 'olcSyncProvConfig' "
2797                 "DESC 'SyncRepl Provider configuration' "
2798                 "SUP olcOverlayConfig "
2799                 "MAY ( olcSpCheckpoint "
2800                         "$ olcSpSessionlog "
2801                         "$ olcSpNoPresent "
2802                         "$ olcSpReloadHint "
2803                 ") )",
2804                         Cft_Overlay, spcfg },
2805         { NULL, 0, NULL }
2806 };
2807
2808 static int
2809 sp_cf_gen(ConfigArgs *c)
2810 {
2811         slap_overinst           *on = (slap_overinst *)c->bi;
2812         syncprov_info_t         *si = (syncprov_info_t *)on->on_bi.bi_private;
2813         int rc = 0;
2814
2815         if ( c->op == SLAP_CONFIG_EMIT ) {
2816                 switch ( c->type ) {
2817                 case SP_CHKPT:
2818                         if ( si->si_chkops || si->si_chktime ) {
2819                                 struct berval bv;
2820                                 /* we assume si_chktime is a multiple of 60
2821                                  * because the parsed value was originally
2822                                  * multiplied by 60 */
2823                                 bv.bv_len = snprintf( c->cr_msg, sizeof( c->cr_msg ),
2824                                         "%d %d", si->si_chkops, si->si_chktime/60 );
2825                                 if ( bv.bv_len >= sizeof( c->cr_msg ) ) {
2826                                         rc = 1;
2827                                 } else {
2828                                         bv.bv_val = c->cr_msg;
2829                                         value_add_one( &c->rvalue_vals, &bv );
2830                                 }
2831                         } else {
2832                                 rc = 1;
2833                         }
2834                         break;
2835                 case SP_SESSL:
2836                         if ( si->si_logs ) {
2837                                 c->value_int = si->si_logs->sl_size;
2838                         } else {
2839                                 rc = 1;
2840                         }
2841                         break;
2842                 case SP_NOPRES:
2843                         if ( si->si_nopres ) {
2844                                 c->value_int = 1;
2845                         } else {
2846                                 rc = 1;
2847                         }
2848                         break;
2849                 case SP_USEHINT:
2850                         if ( si->si_usehint ) {
2851                                 c->value_int = 1;
2852                         } else {
2853                                 rc = 1;
2854                         }
2855                         break;
2856                 }
2857                 return rc;
2858         } else if ( c->op == LDAP_MOD_DELETE ) {
2859                 switch ( c->type ) {
2860                 case SP_CHKPT:
2861                         si->si_chkops = 0;
2862                         si->si_chktime = 0;
2863                         break;
2864                 case SP_SESSL:
2865                         if ( si->si_logs )
2866                                 si->si_logs->sl_size = 0;
2867                         else
2868                                 rc = LDAP_NO_SUCH_ATTRIBUTE;
2869                         break;
2870                 case SP_NOPRES:
2871                         if ( si->si_nopres )
2872                                 si->si_nopres = 0;
2873                         else
2874                                 rc = LDAP_NO_SUCH_ATTRIBUTE;
2875                         break;
2876                 case SP_USEHINT:
2877                         if ( si->si_usehint )
2878                                 si->si_usehint = 0;
2879                         else
2880                                 rc = LDAP_NO_SUCH_ATTRIBUTE;
2881                         break;
2882                 }
2883                 return rc;
2884         }
2885         switch ( c->type ) {
2886         case SP_CHKPT:
2887                 if ( lutil_atoi( &si->si_chkops, c->argv[1] ) != 0 ) {
2888                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s unable to parse checkpoint ops # \"%s\"",
2889                                 c->argv[0], c->argv[1] );
2890                         Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
2891                                 "%s: %s\n", c->log, c->cr_msg, 0 );
2892                         return ARG_BAD_CONF;
2893                 }
2894                 if ( si->si_chkops <= 0 ) {
2895                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s invalid checkpoint ops # \"%d\"",
2896                                 c->argv[0], si->si_chkops );
2897                         Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
2898                                 "%s: %s\n", c->log, c->cr_msg, 0 );
2899                         return ARG_BAD_CONF;
2900                 }
2901                 if ( lutil_atoi( &si->si_chktime, c->argv[2] ) != 0 ) {
2902                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s unable to parse checkpoint time \"%s\"",
2903                                 c->argv[0], c->argv[1] );
2904                         Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
2905                                 "%s: %s\n", c->log, c->cr_msg, 0 );
2906                         return ARG_BAD_CONF;
2907                 }
2908                 if ( si->si_chktime <= 0 ) {
2909                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s invalid checkpoint time \"%d\"",
2910                                 c->argv[0], si->si_chkops );
2911                         Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
2912                                 "%s: %s\n", c->log, c->cr_msg, 0 );
2913                         return ARG_BAD_CONF;
2914                 }
2915                 si->si_chktime *= 60;
2916                 break;
2917         case SP_SESSL: {
2918                 sessionlog *sl;
2919                 int size = c->value_int;
2920
2921                 if ( size < 0 ) {
2922                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s size %d is negative",
2923                                 c->argv[0], size );
2924                         Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
2925                                 "%s: %s\n", c->log, c->cr_msg, 0 );
2926                         return ARG_BAD_CONF;
2927                 }
2928                 sl = si->si_logs;
2929                 if ( !sl ) {
2930                         sl = ch_malloc( sizeof( sessionlog ) );
2931                         sl->sl_num = 0;
2932                         sl->sl_head = sl->sl_tail = NULL;
2933                         ldap_pvt_thread_mutex_init( &sl->sl_mutex );
2934                         si->si_logs = sl;
2935                 }
2936                 sl->sl_size = size;
2937                 }
2938                 break;
2939         case SP_NOPRES:
2940                 si->si_nopres = c->value_int;
2941                 break;
2942         case SP_USEHINT:
2943                 si->si_usehint = c->value_int;
2944                 break;
2945         }
2946         return rc;
2947 }
2948
2949 /* ITS#3456 we cannot run this search on the main thread, must use a
2950  * child thread in order to insure we have a big enough stack.
2951  */
2952 static void *
2953 syncprov_db_otask(
2954         void *ptr
2955 )
2956 {
2957         syncprov_findcsn( ptr, FIND_MAXCSN );
2958         return NULL;
2959 }
2960
2961 /* Read any existing contextCSN from the underlying db.
2962  * Then search for any entries newer than that. If no value exists,
2963  * just generate it. Cache whatever result.
2964  */
2965 static int
2966 syncprov_db_open(
2967         BackendDB *be,
2968         ConfigReply *cr
2969 )
2970 {
2971         slap_overinst   *on = (slap_overinst *) be->bd_info;
2972         syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
2973
2974         Connection conn = { 0 };
2975         OperationBuffer opbuf;
2976         Operation *op;
2977         Entry *e = NULL;
2978         Attribute *a;
2979         int rc;
2980         void *thrctx = NULL;
2981
2982         if ( !SLAP_LASTMOD( be )) {
2983                 Debug( LDAP_DEBUG_ANY,
2984                         "syncprov_db_open: invalid config, lastmod must be enabled\n", 0, 0, 0 );
2985                 return -1;
2986         }
2987
2988         if ( slapMode & SLAP_TOOL_MODE ) {
2989                 return 0;
2990         }
2991
2992         rc = overlay_register_control( be, LDAP_CONTROL_SYNC );
2993         if ( rc ) {
2994                 return rc;
2995         }
2996
2997         thrctx = ldap_pvt_thread_pool_context();
2998         connection_fake_init2( &conn, &opbuf, thrctx, 0 );
2999         op = &opbuf.ob_op;
3000         op->o_bd = be;
3001         op->o_dn = be->be_rootdn;
3002         op->o_ndn = be->be_rootndn;
3003
3004         if ( SLAP_SYNC_SUBENTRY( be )) {
3005                 build_new_dn( &si->si_contextdn, be->be_nsuffix,
3006                         (struct berval *)&slap_ldapsync_cn_bv, NULL );
3007         } else {
3008                 si->si_contextdn = be->be_nsuffix[0];
3009         }
3010         rc = overlay_entry_get_ov( op, &si->si_contextdn, NULL,
3011                 slap_schema.si_ad_contextCSN, 0, &e, on );
3012
3013         if ( e ) {
3014                 ldap_pvt_thread_t tid;
3015
3016                 a = attr_find( e->e_attrs, slap_schema.si_ad_contextCSN );
3017                 if ( a ) {
3018                         ber_bvarray_dup_x( &si->si_ctxcsn, a->a_vals, NULL );
3019                         si->si_numcsns = a->a_numvals;
3020                         si->si_sids = slap_parse_csn_sids( si->si_ctxcsn, a->a_numvals, NULL );
3021                 }
3022                 overlay_entry_release_ov( op, e, 0, on );
3023                 if ( si->si_ctxcsn && !SLAP_DBCLEAN( be )) {
3024                         op->o_req_dn = be->be_suffix[0];
3025                         op->o_req_ndn = be->be_nsuffix[0];
3026                         op->ors_scope = LDAP_SCOPE_SUBTREE;
3027                         ldap_pvt_thread_create( &tid, 0, syncprov_db_otask, op );
3028                         ldap_pvt_thread_join( tid, NULL );
3029                 }
3030         }
3031
3032         /* Didn't find a contextCSN, should we generate one? */
3033         if ( !si->si_ctxcsn ) {
3034                 char csnbuf[ LDAP_PVT_CSNSTR_BUFSIZE ];
3035                 struct berval csn;
3036
3037                 if ( SLAP_SYNC_SHADOW( op->o_bd )) {
3038                 /* If we're also a consumer, then don't generate anything.
3039                  * Wait for our provider to send it to us, or for a local
3040                  * modify if we have multimaster.
3041                  */
3042                         goto out;
3043                 }
3044                 csn.bv_val = csnbuf;
3045                 csn.bv_len = sizeof( csnbuf );
3046                 slap_get_csn( op, &csn, 0 );
3047                 value_add_one( &si->si_ctxcsn, &csn );
3048                 si->si_numcsns = 1;
3049                 si->si_sids = ch_malloc( sizeof(int) );
3050                 si->si_sids[0] = slap_serverID;
3051
3052                 /* make sure we do a checkpoint on close */
3053                 si->si_numops++;
3054         }
3055
3056 out:
3057         op->o_bd->bd_info = (BackendInfo *)on;
3058         return 0;
3059 }
3060
3061 /* Write the current contextCSN into the underlying db.
3062  */
3063 static int
3064 syncprov_db_close(
3065         BackendDB *be,
3066         ConfigReply *cr
3067 )
3068 {
3069     slap_overinst   *on = (slap_overinst *) be->bd_info;
3070     syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
3071 #ifdef SLAP_CONFIG_DELETE
3072         syncops *so, *sonext;
3073 #endif /* SLAP_CONFIG_DELETE */
3074
3075         if ( slapMode & SLAP_TOOL_MODE ) {
3076                 return 0;
3077         }
3078         if ( si->si_numops ) {
3079                 Connection conn = {0};
3080                 OperationBuffer opbuf;
3081                 Operation *op;
3082                 void *thrctx;
3083
3084                 thrctx = ldap_pvt_thread_pool_context();
3085                 connection_fake_init2( &conn, &opbuf, thrctx, 0 );
3086                 op = &opbuf.ob_op;
3087                 op->o_bd = be;
3088                 op->o_dn = be->be_rootdn;
3089                 op->o_ndn = be->be_rootndn;
3090                 syncprov_checkpoint( op, on );
3091         }
3092
3093 #ifdef SLAP_CONFIG_DELETE
3094         ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
3095         for ( so=si->si_ops, sonext=so;  so; so=sonext  ) {
3096                 SlapReply rs = {REP_RESULT};
3097                 rs.sr_err = LDAP_UNAVAILABLE;
3098                 send_ldap_result( so->s_op, &rs );
3099                 sonext=so->s_next;
3100                 syncprov_drop_psearch( so, 0);
3101         }
3102         si->si_ops=NULL;
3103         ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
3104         overlay_unregister_control( be, LDAP_CONTROL_SYNC );
3105 #endif /* SLAP_CONFIG_DELETE */
3106
3107     return 0;
3108 }
3109
3110 static int
3111 syncprov_db_init(
3112         BackendDB *be,
3113         ConfigReply *cr
3114 )
3115 {
3116         slap_overinst   *on = (slap_overinst *)be->bd_info;
3117         syncprov_info_t *si;
3118
3119         if ( SLAP_ISGLOBALOVERLAY( be ) ) {
3120                 Debug( LDAP_DEBUG_ANY,
3121                         "syncprov must be instantiated within a database.\n",
3122                         0, 0, 0 );
3123                 return 1;
3124         }
3125
3126         si = ch_calloc(1, sizeof(syncprov_info_t));
3127         on->on_bi.bi_private = si;
3128         ldap_pvt_thread_rdwr_init( &si->si_csn_rwlock );
3129         ldap_pvt_thread_mutex_init( &si->si_ops_mutex );
3130         ldap_pvt_thread_mutex_init( &si->si_mods_mutex );
3131         ldap_pvt_thread_mutex_init( &si->si_resp_mutex );
3132
3133         csn_anlist[0].an_desc = slap_schema.si_ad_entryCSN;
3134         csn_anlist[0].an_name = slap_schema.si_ad_entryCSN->ad_cname;
3135         csn_anlist[1].an_desc = slap_schema.si_ad_entryUUID;
3136         csn_anlist[1].an_name = slap_schema.si_ad_entryUUID->ad_cname;
3137
3138         uuid_anlist[0].an_desc = slap_schema.si_ad_entryUUID;
3139         uuid_anlist[0].an_name = slap_schema.si_ad_entryUUID->ad_cname;
3140
3141         return 0;
3142 }
3143
3144 static int
3145 syncprov_db_destroy(
3146         BackendDB *be,
3147         ConfigReply *cr
3148 )
3149 {
3150         slap_overinst   *on = (slap_overinst *)be->bd_info;
3151         syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
3152
3153         if ( si ) {
3154                 if ( si->si_logs ) {
3155                         slog_entry *se = si->si_logs->sl_head;
3156
3157                         while ( se ) {
3158                                 slog_entry *se_next = se->se_next;
3159                                 ch_free( se );
3160                                 se = se_next;
3161                         }
3162
3163                         ldap_pvt_thread_mutex_destroy(&si->si_logs->sl_mutex);
3164                         ch_free( si->si_logs );
3165                 }
3166                 if ( si->si_ctxcsn )
3167                         ber_bvarray_free( si->si_ctxcsn );
3168                 if ( si->si_sids )
3169                         ch_free( si->si_sids );
3170                 ldap_pvt_thread_mutex_destroy( &si->si_resp_mutex );
3171                 ldap_pvt_thread_mutex_destroy( &si->si_mods_mutex );
3172                 ldap_pvt_thread_mutex_destroy( &si->si_ops_mutex );
3173                 ldap_pvt_thread_rdwr_destroy( &si->si_csn_rwlock );
3174                 ch_free( si );
3175         }
3176
3177         return 0;
3178 }
3179
3180 static int syncprov_parseCtrl (
3181         Operation *op,
3182         SlapReply *rs,
3183         LDAPControl *ctrl )
3184 {
3185         ber_tag_t tag;
3186         BerElementBuffer berbuf;
3187         BerElement *ber = (BerElement *)&berbuf;
3188         ber_int_t mode;
3189         ber_len_t len;
3190         struct berval cookie = BER_BVNULL;
3191         sync_control *sr;
3192         int rhint = 0;
3193
3194         if ( op->o_sync != SLAP_CONTROL_NONE ) {
3195                 rs->sr_text = "Sync control specified multiple times";
3196                 return LDAP_PROTOCOL_ERROR;
3197         }
3198
3199         if ( op->o_pagedresults != SLAP_CONTROL_NONE ) {
3200                 rs->sr_text = "Sync control specified with pagedResults control";
3201                 return LDAP_PROTOCOL_ERROR;
3202         }
3203
3204         if ( BER_BVISNULL( &ctrl->ldctl_value ) ) {
3205                 rs->sr_text = "Sync control value is absent";
3206                 return LDAP_PROTOCOL_ERROR;
3207         }
3208
3209         if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
3210                 rs->sr_text = "Sync control value is empty";
3211                 return LDAP_PROTOCOL_ERROR;
3212         }
3213
3214         /* Parse the control value
3215          *      syncRequestValue ::= SEQUENCE {
3216          *              mode   ENUMERATED {
3217          *                      -- 0 unused
3218          *                      refreshOnly             (1),
3219          *                      -- 2 reserved
3220          *                      refreshAndPersist       (3)
3221          *              },
3222          *              cookie  syncCookie OPTIONAL
3223          *      }
3224          */
3225
3226         ber_init2( ber, &ctrl->ldctl_value, 0 );
3227
3228         if ( (tag = ber_scanf( ber, "{i" /*}*/, &mode )) == LBER_ERROR ) {
3229                 rs->sr_text = "Sync control : mode decoding error";
3230                 return LDAP_PROTOCOL_ERROR;
3231         }
3232
3233         switch( mode ) {
3234         case LDAP_SYNC_REFRESH_ONLY:
3235                 mode = SLAP_SYNC_REFRESH;
3236                 break;
3237         case LDAP_SYNC_REFRESH_AND_PERSIST:
3238                 mode = SLAP_SYNC_REFRESH_AND_PERSIST;
3239                 break;
3240         default:
3241                 rs->sr_text = "Sync control : unknown update mode";
3242                 return LDAP_PROTOCOL_ERROR;
3243         }
3244
3245         tag = ber_peek_tag( ber, &len );
3246
3247         if ( tag == LDAP_TAG_SYNC_COOKIE ) {
3248                 if (( ber_scanf( ber, /*{*/ "m", &cookie )) == LBER_ERROR ) {
3249                         rs->sr_text = "Sync control : cookie decoding error";
3250                         return LDAP_PROTOCOL_ERROR;
3251                 }
3252                 tag = ber_peek_tag( ber, &len );
3253         }
3254         if ( tag == LDAP_TAG_RELOAD_HINT ) {
3255                 if (( ber_scanf( ber, /*{*/ "b", &rhint )) == LBER_ERROR ) {
3256                         rs->sr_text = "Sync control : rhint decoding error";
3257                         return LDAP_PROTOCOL_ERROR;
3258                 }
3259         }
3260         if (( ber_scanf( ber, /*{*/ "}")) == LBER_ERROR ) {
3261                         rs->sr_text = "Sync control : decoding error";
3262                         return LDAP_PROTOCOL_ERROR;
3263         }
3264         sr = op->o_tmpcalloc( 1, sizeof(struct sync_control), op->o_tmpmemctx );
3265         sr->sr_rhint = rhint;
3266         if (!BER_BVISNULL(&cookie)) {
3267                 ber_dupbv_x( &sr->sr_state.octet_str, &cookie, op->o_tmpmemctx );
3268                 /* If parse fails, pretend no cookie was sent */
3269                 if ( slap_parse_sync_cookie( &sr->sr_state, op->o_tmpmemctx ) ||
3270                         sr->sr_state.rid == -1 ) {
3271                         if ( sr->sr_state.ctxcsn ) {
3272                                 ber_bvarray_free_x( sr->sr_state.ctxcsn, op->o_tmpmemctx );
3273                                 sr->sr_state.ctxcsn = NULL;
3274                         }
3275                         sr->sr_state.numcsns = 0;
3276                 }
3277         }
3278
3279         op->o_controls[slap_cids.sc_LDAPsync] = sr;
3280
3281         op->o_sync = ctrl->ldctl_iscritical
3282                 ? SLAP_CONTROL_CRITICAL
3283                 : SLAP_CONTROL_NONCRITICAL;
3284
3285         op->o_sync_mode |= mode;        /* o_sync_mode shares o_sync */
3286
3287         return LDAP_SUCCESS;
3288 }
3289
3290 /* This overlay is set up for dynamic loading via moduleload. For static
3291  * configuration, you'll need to arrange for the slap_overinst to be
3292  * initialized and registered by some other function inside slapd.
3293  */
3294
3295 static slap_overinst            syncprov;
3296
3297 int
3298 syncprov_initialize()
3299 {
3300         int rc;
3301
3302         rc = register_supported_control( LDAP_CONTROL_SYNC,
3303                 SLAP_CTRL_SEARCH, NULL,
3304                 syncprov_parseCtrl, &slap_cids.sc_LDAPsync );
3305         if ( rc != LDAP_SUCCESS ) {
3306                 Debug( LDAP_DEBUG_ANY,
3307                         "syncprov_init: Failed to register control %d\n", rc, 0, 0 );
3308                 return rc;
3309         }
3310
3311         syncprov.on_bi.bi_type = "syncprov";
3312         syncprov.on_bi.bi_db_init = syncprov_db_init;
3313         syncprov.on_bi.bi_db_destroy = syncprov_db_destroy;
3314         syncprov.on_bi.bi_db_open = syncprov_db_open;
3315         syncprov.on_bi.bi_db_close = syncprov_db_close;
3316
3317         syncprov.on_bi.bi_op_abandon = syncprov_op_abandon;
3318         syncprov.on_bi.bi_op_cancel = syncprov_op_abandon;
3319
3320         syncprov.on_bi.bi_op_add = syncprov_op_mod;
3321         syncprov.on_bi.bi_op_compare = syncprov_op_compare;
3322         syncprov.on_bi.bi_op_delete = syncprov_op_mod;
3323         syncprov.on_bi.bi_op_modify = syncprov_op_mod;
3324         syncprov.on_bi.bi_op_modrdn = syncprov_op_mod;
3325         syncprov.on_bi.bi_op_search = syncprov_op_search;
3326         syncprov.on_bi.bi_extended = syncprov_op_extended;
3327         syncprov.on_bi.bi_operational = syncprov_operational;
3328
3329         syncprov.on_bi.bi_cf_ocs = spocs;
3330
3331         generic_filter.f_desc = slap_schema.si_ad_objectClass;
3332
3333         rc = config_register_schema( spcfg, spocs );
3334         if ( rc ) return rc;
3335
3336         return overlay_register( &syncprov );
3337 }
3338
3339 #if SLAPD_OVER_SYNCPROV == SLAPD_MOD_DYNAMIC
3340 int
3341 init_module( int argc, char *argv[] )
3342 {
3343         return syncprov_initialize();
3344 }
3345 #endif /* SLAPD_OVER_SYNCPROV == SLAPD_MOD_DYNAMIC */
3346
3347 #endif /* defined(SLAPD_OVER_SYNCPROV) */