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                         unsigned i;
1825                         int j, sid;
1826
1827                         for ( i=0; i<mod->sml_numvals; i++ ) {
1828                                 sid = slap_parse_csn_sid( &mod->sml_values[i] );
1829                                 for ( j=0; j<si->si_numcsns; j++ ) {
1830                                         if ( sid == si->si_sids[j] ) {
1831                                                 if ( ber_bvcmp( &mod->sml_values[i], &si->si_ctxcsn[j] ) > 0 ) {
1832                                                         ber_bvreplace( &si->si_ctxcsn[j], &mod->sml_values[i] );
1833                                                         csn_changed = 1;
1834                                                 }
1835                                                 break;
1836                                         }
1837                                 }
1838
1839                                 if ( j == si->si_numcsns ) {
1840                                         value_add_one( &si->si_ctxcsn, &mod->sml_values[i] );
1841                                         si->si_numcsns++;
1842                                         si->si_sids = ch_realloc( si->si_sids, si->si_numcsns *
1843                                                 sizeof(int));
1844                                         si->si_sids[j] = sid;
1845                                         csn_changed = 1;
1846                                 }
1847                         }
1848                         if ( csn_changed )
1849                                 si->si_dirty = 0;
1850                         ldap_pvt_thread_rdwr_wunlock( &si->si_csn_rwlock );
1851
1852                         if ( csn_changed ) {
1853                                 syncops *ss;
1854                                 ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
1855                                 for ( ss = si->si_ops; ss; ss = ss->s_next ) {
1856                                         if ( ss->s_op->o_abandon )
1857                                                 continue;
1858                                         /* Send the updated csn to all syncrepl consumers,
1859                                          * including the server from which it originated.
1860                                          * The syncrepl consumer and syncprov provider on
1861                                          * the originating server may be configured to store
1862                                          * their csn values in different entries.
1863                                          */
1864                                         syncprov_qresp( opc, ss, LDAP_SYNC_NEW_COOKIE );
1865                                 }
1866                                 ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
1867                         }
1868                         } else {
1869                         ldap_pvt_thread_rdwr_wunlock( &si->si_csn_rwlock );
1870                         }
1871                         goto leave;
1872                 }
1873
1874                 si->si_numops++;
1875                 if ( si->si_chkops || si->si_chktime ) {
1876                         /* Never checkpoint adding the context entry,
1877                          * it will deadlock
1878                          */
1879                         if ( op->o_tag != LDAP_REQ_ADD ||
1880                                 !dn_match( &op->o_req_ndn, &si->si_contextdn )) {
1881                                 if ( si->si_chkops && si->si_numops >= si->si_chkops ) {
1882                                         do_check = 1;
1883                                         si->si_numops = 0;
1884                                 }
1885                                 if ( si->si_chktime &&
1886                                         (op->o_time - si->si_chklast >= si->si_chktime )) {
1887                                         if ( si->si_chklast ) {
1888                                                 do_check = 1;
1889                                                 si->si_chklast = op->o_time;
1890                                         } else {
1891                                                 si->si_chklast = 1;
1892                                         }
1893                                 }
1894                         }
1895                 }
1896                 si->si_dirty = !csn_changed;
1897                 ldap_pvt_thread_rdwr_wunlock( &si->si_csn_rwlock );
1898
1899                 if ( do_check ) {
1900                         ldap_pvt_thread_rdwr_rlock( &si->si_csn_rwlock );
1901                         syncprov_checkpoint( op, on );
1902                         ldap_pvt_thread_rdwr_runlock( &si->si_csn_rwlock );
1903                 }
1904
1905                 /* only update consumer ctx if this is a newer csn */
1906                 if ( csn_changed ) {
1907                         opc->sctxcsn = maxcsn;
1908                 }
1909
1910                 /* Handle any persistent searches */
1911                 ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
1912                 have_psearches = ( si->si_ops != NULL );
1913                 ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
1914                 if ( have_psearches ) {
1915                         switch(op->o_tag) {
1916                         case LDAP_REQ_ADD:
1917                         case LDAP_REQ_MODIFY:
1918                         case LDAP_REQ_MODRDN:
1919                         case LDAP_REQ_EXTENDED:
1920                                 syncprov_matchops( op, opc, 0 );
1921                                 break;
1922                         case LDAP_REQ_DELETE:
1923                                 /* for each match in opc->smatches:
1924                                  *   send DELETE msg
1925                                  */
1926                                 for ( sm = opc->smatches; sm; sm=sm->sm_next ) {
1927                                         if ( sm->sm_op->s_op->o_abandon )
1928                                                 continue;
1929                                         syncprov_qresp( opc, sm->sm_op, LDAP_SYNC_DELETE );
1930                                 }
1931                                 break;
1932                         }
1933                 }
1934
1935                 /* Add any log records */
1936                 if ( si->si_logs ) {
1937                         syncprov_add_slog( op );
1938                 }
1939 leave:          ldap_pvt_thread_mutex_unlock( &si->si_resp_mutex );
1940         }
1941         return SLAP_CB_CONTINUE;
1942 }
1943
1944 /* We don't use a subentry to store the context CSN any more.
1945  * We expose the current context CSN as an operational attribute
1946  * of the suffix entry.
1947  */
1948 static int
1949 syncprov_op_compare( Operation *op, SlapReply *rs )
1950 {
1951         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
1952         syncprov_info_t         *si = on->on_bi.bi_private;
1953         int rc = SLAP_CB_CONTINUE;
1954
1955         if ( dn_match( &op->o_req_ndn, &si->si_contextdn ) &&
1956                 op->oq_compare.rs_ava->aa_desc == slap_schema.si_ad_contextCSN )
1957         {
1958                 Entry e = {0};
1959                 Attribute a = {0};
1960
1961                 e.e_name = si->si_contextdn;
1962                 e.e_nname = si->si_contextdn;
1963                 e.e_attrs = &a;
1964
1965                 a.a_desc = slap_schema.si_ad_contextCSN;
1966
1967                 ldap_pvt_thread_rdwr_rlock( &si->si_csn_rwlock );
1968
1969                 a.a_vals = si->si_ctxcsn;
1970                 a.a_nvals = a.a_vals;
1971                 a.a_numvals = si->si_numcsns;
1972
1973                 rs->sr_err = access_allowed( op, &e, op->oq_compare.rs_ava->aa_desc,
1974                         &op->oq_compare.rs_ava->aa_value, ACL_COMPARE, NULL );
1975                 if ( ! rs->sr_err ) {
1976                         rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
1977                         goto return_results;
1978                 }
1979
1980                 if ( get_assert( op ) &&
1981                         ( test_filter( op, &e, get_assertion( op ) ) != LDAP_COMPARE_TRUE ) )
1982                 {
1983                         rs->sr_err = LDAP_ASSERTION_FAILED;
1984                         goto return_results;
1985                 }
1986
1987
1988                 rs->sr_err = LDAP_COMPARE_FALSE;
1989
1990                 if ( attr_valfind( &a,
1991                         SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
1992                                 SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
1993                                 &op->oq_compare.rs_ava->aa_value, NULL, op->o_tmpmemctx ) == 0 )
1994                 {
1995                         rs->sr_err = LDAP_COMPARE_TRUE;
1996                 }
1997
1998 return_results:;
1999
2000                 ldap_pvt_thread_rdwr_runlock( &si->si_csn_rwlock );
2001
2002                 send_ldap_result( op, rs );
2003
2004                 if( rs->sr_err == LDAP_COMPARE_FALSE || rs->sr_err == LDAP_COMPARE_TRUE ) {
2005                         rs->sr_err = LDAP_SUCCESS;
2006                 }
2007                 rc = rs->sr_err;
2008         }
2009
2010         return rc;
2011 }
2012
2013 static int
2014 syncprov_op_mod( Operation *op, SlapReply *rs )
2015 {
2016         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
2017         syncprov_info_t         *si = on->on_bi.bi_private;
2018         slap_callback *cb;
2019         opcookie *opc;
2020         int have_psearches, cbsize;
2021
2022         ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
2023         have_psearches = ( si->si_ops != NULL );
2024         si->si_active++;
2025         ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
2026
2027         cbsize = sizeof(slap_callback) + sizeof(opcookie) +
2028                 (have_psearches ? sizeof(modinst) : 0 );
2029
2030         cb = op->o_tmpcalloc(1, cbsize, op->o_tmpmemctx);
2031         opc = (opcookie *)(cb+1);
2032         opc->son = on;
2033         cb->sc_response = syncprov_op_response;
2034         cb->sc_cleanup = syncprov_op_cleanup;
2035         cb->sc_private = opc;
2036         cb->sc_next = op->o_callback;
2037         op->o_callback = cb;
2038
2039         opc->osid = -1;
2040         opc->rsid = -1;
2041         if ( op->o_csn.bv_val ) {
2042                 opc->osid = slap_parse_csn_sid( &op->o_csn );
2043         }
2044         if ( op->o_controls ) {
2045                 struct sync_cookie *scook =
2046                 op->o_controls[slap_cids.sc_LDAPsync];
2047                 if ( scook )
2048                         opc->rsid = scook->sid;
2049         }
2050
2051         /* If there are active persistent searches, lock this operation.
2052          * See seqmod.c for the locking logic on its own.
2053          */
2054         if ( have_psearches ) {
2055                 modtarget *mt, mtdummy;
2056                 modinst *mi;
2057
2058                 mi = (modinst *)(opc+1);
2059                 mi->mi_op = op;
2060
2061                 /* See if we're already modifying this entry... */
2062                 mtdummy.mt_op = op;
2063                 ldap_pvt_thread_mutex_lock( &si->si_mods_mutex );
2064                 mt = avl_find( si->si_mods, &mtdummy, sp_avl_cmp );
2065                 if ( mt ) {
2066                         ldap_pvt_thread_mutex_lock( &mt->mt_mutex );
2067                         if ( mt->mt_mods == NULL ) {
2068                                 /* Cannot reuse this mt, as another thread is about
2069                                  * to release it in syncprov_op_cleanup.
2070                                  */
2071                                 ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
2072                                 mt = NULL;
2073                         }
2074                 }
2075                 if ( mt ) {
2076                         ldap_pvt_thread_mutex_unlock( &si->si_mods_mutex );
2077                         mt->mt_tail->mi_next = mi;
2078                         mt->mt_tail = mi;
2079                         /* wait for this op to get to head of list */
2080                         while ( mt->mt_mods != mi ) {
2081                                 ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
2082                                 /* FIXME: if dynamic config can delete overlays or
2083                                  * databases we'll have to check for cleanup here.
2084                                  * Currently it's not an issue because there are
2085                                  * no dynamic config deletes...
2086                                  */
2087                                 if ( slapd_shutdown )
2088                                         return SLAPD_ABANDON;
2089
2090                                 if ( !ldap_pvt_thread_pool_pausecheck( &connection_pool ))
2091                                         ldap_pvt_thread_yield();
2092                                 ldap_pvt_thread_mutex_lock( &mt->mt_mutex );
2093
2094                                 /* clean up if the caller is giving up */
2095                                 if ( op->o_abandon ) {
2096                                         modinst *m2;
2097                                         for ( m2 = mt->mt_mods; m2->mi_next != mi;
2098                                                 m2 = m2->mi_next );
2099                                         m2->mi_next = mi->mi_next;
2100                                         if ( mt->mt_tail == mi ) mt->mt_tail = m2;
2101                                         op->o_tmpfree( cb, op->o_tmpmemctx );
2102                                         ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
2103                                         return SLAPD_ABANDON;
2104                                 }
2105                         }
2106                         ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
2107                 } else {
2108                         /* Record that we're modifying this entry now */
2109                         mt = ch_malloc( sizeof(modtarget) );
2110                         mt->mt_mods = mi;
2111                         mt->mt_tail = mi;
2112                         mt->mt_op = mi->mi_op;
2113                         ldap_pvt_thread_mutex_init( &mt->mt_mutex );
2114                         avl_insert( &si->si_mods, mt, sp_avl_cmp, avl_dup_error );
2115                         ldap_pvt_thread_mutex_unlock( &si->si_mods_mutex );
2116                 }
2117                 opc->smt = mt;
2118         }
2119
2120         if (( have_psearches || si->si_logs ) && op->o_tag != LDAP_REQ_ADD )
2121                 syncprov_matchops( op, opc, 1 );
2122
2123         return SLAP_CB_CONTINUE;
2124 }
2125
2126 static int
2127 syncprov_op_extended( Operation *op, SlapReply *rs )
2128 {
2129         if ( exop_is_write( op ))
2130                 return syncprov_op_mod( op, rs );
2131
2132         return SLAP_CB_CONTINUE;
2133 }
2134
2135 typedef struct searchstate {
2136         slap_overinst *ss_on;
2137         syncops *ss_so;
2138         BerVarray ss_ctxcsn;
2139         int *ss_sids;
2140         int ss_numcsns;
2141 #define SS_PRESENT      0x01
2142 #define SS_CHANGED      0x02
2143         int ss_flags;
2144 } searchstate;
2145
2146 static int
2147 syncprov_search_cleanup( Operation *op, SlapReply *rs )
2148 {
2149         if ( rs->sr_ctrls ) {
2150                 op->o_tmpfree( rs->sr_ctrls[0], op->o_tmpmemctx );
2151                 op->o_tmpfree( rs->sr_ctrls, op->o_tmpmemctx );
2152                 rs->sr_ctrls = NULL;
2153         }
2154         return 0;
2155 }
2156
2157 typedef struct SyncOperationBuffer {
2158         Operation               sob_op;
2159         Opheader                sob_hdr;
2160         OpExtra                 sob_oe;
2161         AttributeName   sob_extra;      /* not always present */
2162         /* Further data allocated here */
2163 } SyncOperationBuffer;
2164
2165 static void
2166 syncprov_detach_op( Operation *op, syncops *so, slap_overinst *on )
2167 {
2168         SyncOperationBuffer *sopbuf2;
2169         Operation *op2;
2170         int i, alen = 0;
2171         size_t size;
2172         char *ptr;
2173         GroupAssertion *g1, *g2;
2174
2175         /* count the search attrs */
2176         for (i=0; op->ors_attrs && !BER_BVISNULL( &op->ors_attrs[i].an_name ); i++) {
2177                 alen += op->ors_attrs[i].an_name.bv_len + 1;
2178         }
2179         /* Make a new copy of the operation */
2180         size = offsetof( SyncOperationBuffer, sob_extra ) +
2181                 (i ? ( (i+1) * sizeof(AttributeName) + alen) : 0) +
2182                 op->o_req_dn.bv_len + 1 +
2183                 op->o_req_ndn.bv_len + 1 +
2184                 op->o_ndn.bv_len + 1 +
2185                 so->s_filterstr.bv_len + 1;
2186         sopbuf2 = ch_calloc( 1, size );
2187         op2 = &sopbuf2->sob_op;
2188         op2->o_hdr = &sopbuf2->sob_hdr;
2189         LDAP_SLIST_FIRST(&op2->o_extra) = &sopbuf2->sob_oe;
2190
2191         /* Copy the fields we care about explicitly, leave the rest alone */
2192         *op2->o_hdr = *op->o_hdr;
2193         op2->o_tag = op->o_tag;
2194         op2->o_time = op->o_time;
2195         op2->o_bd = on->on_info->oi_origdb;
2196         op2->o_request = op->o_request;
2197         op2->o_managedsait = op->o_managedsait;
2198         LDAP_SLIST_FIRST(&op2->o_extra)->oe_key = on;
2199         LDAP_SLIST_NEXT(LDAP_SLIST_FIRST(&op2->o_extra), oe_next) = NULL;
2200
2201         ptr = (char *) sopbuf2 + offsetof( SyncOperationBuffer, sob_extra );
2202         if ( i ) {
2203                 op2->ors_attrs = (AttributeName *) ptr;
2204                 ptr = (char *) &op2->ors_attrs[i+1];
2205                 for (i=0; !BER_BVISNULL( &op->ors_attrs[i].an_name ); i++) {
2206                         op2->ors_attrs[i] = op->ors_attrs[i];
2207                         op2->ors_attrs[i].an_name.bv_val = ptr;
2208                         ptr = lutil_strcopy( ptr, op->ors_attrs[i].an_name.bv_val ) + 1;
2209                 }
2210                 BER_BVZERO( &op2->ors_attrs[i].an_name );
2211         }
2212
2213         op2->o_authz = op->o_authz;
2214         op2->o_ndn.bv_val = ptr;
2215         ptr = lutil_strcopy(ptr, op->o_ndn.bv_val) + 1;
2216         op2->o_dn = op2->o_ndn;
2217         op2->o_req_dn.bv_len = op->o_req_dn.bv_len;
2218         op2->o_req_dn.bv_val = ptr;
2219         ptr = lutil_strcopy(ptr, op->o_req_dn.bv_val) + 1;
2220         op2->o_req_ndn.bv_len = op->o_req_ndn.bv_len;
2221         op2->o_req_ndn.bv_val = ptr;
2222         ptr = lutil_strcopy(ptr, op->o_req_ndn.bv_val) + 1;
2223         op2->ors_filterstr.bv_val = ptr;
2224         strcpy( ptr, so->s_filterstr.bv_val );
2225         op2->ors_filterstr.bv_len = so->s_filterstr.bv_len;
2226
2227         /* Skip the AND/GE clause that we stuck on in front */
2228         if ( so->s_flags & PS_FIX_FILTER ) {
2229                 op2->ors_filter = op->ors_filter->f_and->f_next;
2230                 so->s_flags ^= PS_FIX_FILTER;
2231         } else {
2232                 op2->ors_filter = op->ors_filter;
2233         }
2234         op2->ors_filter = filter_dup( op2->ors_filter, NULL );
2235         so->s_op = op2;
2236
2237         /* Copy any cached group ACLs individually */
2238         op2->o_groups = NULL;
2239         for ( g1=op->o_groups; g1; g1=g1->ga_next ) {
2240                 g2 = ch_malloc( sizeof(GroupAssertion) + g1->ga_len );
2241                 *g2 = *g1;
2242                 strcpy( g2->ga_ndn, g1->ga_ndn );
2243                 g2->ga_next = op2->o_groups;
2244                 op2->o_groups = g2;
2245         }
2246         /* Don't allow any further group caching */
2247         op2->o_do_not_cache = 1;
2248
2249         /* Add op2 to conn so abandon will find us */
2250         op->o_conn->c_n_ops_executing++;
2251         op->o_conn->c_n_ops_completed--;
2252         LDAP_STAILQ_INSERT_TAIL( &op->o_conn->c_ops, op2, o_next );
2253         so->s_flags |= PS_IS_DETACHED;
2254
2255         /* Prevent anyone else from trying to send a result for this op */
2256         op->o_abandon = 1;
2257 }
2258
2259 static int
2260 syncprov_search_response( Operation *op, SlapReply *rs )
2261 {
2262         searchstate *ss = op->o_callback->sc_private;
2263         slap_overinst *on = ss->ss_on;
2264         syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
2265         sync_control *srs = op->o_controls[slap_cids.sc_LDAPsync];
2266
2267         if ( rs->sr_type == REP_SEARCH || rs->sr_type == REP_SEARCHREF ) {
2268                 Attribute *a;
2269                 /* If we got a referral without a referral object, there's
2270                  * something missing that we cannot replicate. Just ignore it.
2271                  * The consumer will abort because we didn't send the expected
2272                  * control.
2273                  */
2274                 if ( !rs->sr_entry ) {
2275                         assert( rs->sr_entry != NULL );
2276                         Debug( LDAP_DEBUG_ANY, "bogus referral in context\n",0,0,0 );
2277                         return SLAP_CB_CONTINUE;
2278                 }
2279                 a = attr_find( rs->sr_entry->e_attrs, slap_schema.si_ad_entryCSN );
2280                 if ( a == NULL && rs->sr_operational_attrs != NULL ) {
2281                         a = attr_find( rs->sr_operational_attrs, slap_schema.si_ad_entryCSN );
2282                 }
2283                 if ( a ) {
2284                         int i, sid;
2285                         sid = slap_parse_csn_sid( &a->a_nvals[0] );
2286
2287                         /* Don't send changed entries back to the originator */
2288                         if ( sid == srs->sr_state.sid && srs->sr_state.numcsns ) {
2289                                 Debug( LDAP_DEBUG_SYNC,
2290                                         "Entry %s changed by peer, ignored\n",
2291                                         rs->sr_entry->e_name.bv_val, 0, 0 );
2292                                 return LDAP_SUCCESS;
2293                         }
2294
2295                         /* If not a persistent search */
2296                         if ( !ss->ss_so ) {
2297                                 /* Make sure entry is less than the snapshot'd contextCSN */
2298                                 for ( i=0; i<ss->ss_numcsns; i++ ) {
2299                                         if ( sid == ss->ss_sids[i] && ber_bvcmp( &a->a_nvals[0],
2300                                                 &ss->ss_ctxcsn[i] ) > 0 ) {
2301                                                 Debug( LDAP_DEBUG_SYNC,
2302                                                         "Entry %s CSN %s greater than snapshot %s\n",
2303                                                         rs->sr_entry->e_name.bv_val,
2304                                                         a->a_nvals[0].bv_val,
2305                                                         ss->ss_ctxcsn[i].bv_val );
2306                                                 return LDAP_SUCCESS;
2307                                         }
2308                                 }
2309                         }
2310
2311                         /* Don't send old entries twice */
2312                         if ( srs->sr_state.ctxcsn ) {
2313                                 for ( i=0; i<srs->sr_state.numcsns; i++ ) {
2314                                         if ( sid == srs->sr_state.sids[i] &&
2315                                                 ber_bvcmp( &a->a_nvals[0],
2316                                                         &srs->sr_state.ctxcsn[i] )<= 0 ) {
2317                                                 Debug( LDAP_DEBUG_SYNC,
2318                                                         "Entry %s CSN %s older or equal to ctx %s\n",
2319                                                         rs->sr_entry->e_name.bv_val,
2320                                                         a->a_nvals[0].bv_val,
2321                                                         srs->sr_state.ctxcsn[i].bv_val );
2322                                                 return LDAP_SUCCESS;
2323                                         }
2324                                 }
2325                         }
2326                 }
2327                 rs->sr_ctrls = op->o_tmpalloc( sizeof(LDAPControl *)*2,
2328                         op->o_tmpmemctx );
2329                 rs->sr_ctrls[1] = NULL;
2330                 /* If we're in delta-sync mode, always send a cookie */
2331                 if ( si->si_nopres && si->si_usehint && a ) {
2332                         struct berval cookie;
2333                         slap_compose_sync_cookie( op, &cookie, a->a_nvals, srs->sr_state.rid, slap_serverID ? slap_serverID : -1 );
2334                         rs->sr_err = syncprov_state_ctrl( op, rs, rs->sr_entry,
2335                                 LDAP_SYNC_ADD, rs->sr_ctrls, 0, 1, &cookie );
2336                 } else {
2337                         rs->sr_err = syncprov_state_ctrl( op, rs, rs->sr_entry,
2338                                 LDAP_SYNC_ADD, rs->sr_ctrls, 0, 0, NULL );
2339                 }
2340         } else if ( rs->sr_type == REP_RESULT && rs->sr_err == LDAP_SUCCESS ) {
2341                 struct berval cookie = BER_BVNULL;
2342
2343                 if ( ( ss->ss_flags & SS_CHANGED ) &&
2344                         ss->ss_ctxcsn && !BER_BVISNULL( &ss->ss_ctxcsn[0] )) {
2345                         slap_compose_sync_cookie( op, &cookie, ss->ss_ctxcsn,
2346                                 srs->sr_state.rid, slap_serverID ? slap_serverID : -1 );
2347
2348                         Debug( LDAP_DEBUG_SYNC, "syncprov_search_response: cookie=%s\n", cookie.bv_val, 0, 0 );
2349                 }
2350
2351                 /* Is this a regular refresh?
2352                  * Note: refresh never gets here if there were no changes
2353                  */
2354                 if ( !ss->ss_so ) {
2355                         rs->sr_ctrls = op->o_tmpalloc( sizeof(LDAPControl *)*2,
2356                                 op->o_tmpmemctx );
2357                         rs->sr_ctrls[1] = NULL;
2358                         rs->sr_err = syncprov_done_ctrl( op, rs, rs->sr_ctrls,
2359                                 0, 1, &cookie, ( ss->ss_flags & SS_PRESENT ) ?  LDAP_SYNC_REFRESH_PRESENTS :
2360                                         LDAP_SYNC_REFRESH_DELETES );
2361                         op->o_tmpfree( cookie.bv_val, op->o_tmpmemctx );
2362                 } else {
2363                 /* It's RefreshAndPersist, transition to Persist phase */
2364                         syncprov_sendinfo( op, rs, ( ss->ss_flags & SS_PRESENT ) ?
2365                                 LDAP_TAG_SYNC_REFRESH_PRESENT : LDAP_TAG_SYNC_REFRESH_DELETE,
2366                                 ( ss->ss_flags & SS_CHANGED ) ? &cookie : NULL,
2367                                 1, NULL, 0 );
2368                         if ( !BER_BVISNULL( &cookie ))
2369                                 op->o_tmpfree( cookie.bv_val, op->o_tmpmemctx );
2370
2371                         /* Detach this Op from frontend control */
2372                         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
2373
2374                         /* But not if this connection was closed along the way */
2375                         if ( op->o_abandon ) {
2376                                 ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
2377                                 /* syncprov_ab_cleanup will free this syncop */
2378                                 return SLAPD_ABANDON;
2379
2380                         } else {
2381                                 ldap_pvt_thread_mutex_lock( &ss->ss_so->s_mutex );
2382                                 /* Turn off the refreshing flag */
2383                                 ss->ss_so->s_flags ^= PS_IS_REFRESHING;
2384
2385                                 syncprov_detach_op( op, ss->ss_so, on );
2386
2387                                 ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
2388
2389                                 /* If there are queued responses, fire them off */
2390                                 if ( ss->ss_so->s_res )
2391                                         syncprov_qstart( ss->ss_so );
2392                                 ldap_pvt_thread_mutex_unlock( &ss->ss_so->s_mutex );
2393                         }
2394
2395                         return LDAP_SUCCESS;
2396                 }
2397         }
2398
2399         return SLAP_CB_CONTINUE;
2400 }
2401
2402 static int
2403 syncprov_op_search( Operation *op, SlapReply *rs )
2404 {
2405         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
2406         syncprov_info_t         *si = (syncprov_info_t *)on->on_bi.bi_private;
2407         slap_callback   *cb;
2408         int gotstate = 0, changed = 0, do_present = 0;
2409         syncops *sop = NULL;
2410         searchstate *ss;
2411         sync_control *srs;
2412         BerVarray ctxcsn;
2413         int i, *sids, numcsns;
2414         struct berval mincsn;
2415         int dirty = 0;
2416
2417         if ( !(op->o_sync_mode & SLAP_SYNC_REFRESH) ) return SLAP_CB_CONTINUE;
2418
2419         if ( op->ors_deref & LDAP_DEREF_SEARCHING ) {
2420                 send_ldap_error( op, rs, LDAP_PROTOCOL_ERROR, "illegal value for derefAliases" );
2421                 return rs->sr_err;
2422         }
2423
2424         srs = op->o_controls[slap_cids.sc_LDAPsync];
2425
2426         /* If this is a persistent search, set it up right away */
2427         if ( op->o_sync_mode & SLAP_SYNC_PERSIST ) {
2428                 syncops so = {0};
2429                 fbase_cookie fc;
2430                 opcookie opc;
2431                 slap_callback sc;
2432
2433                 fc.fss = &so;
2434                 fc.fbase = 0;
2435                 so.s_eid = NOID;
2436                 so.s_op = op;
2437                 so.s_flags = PS_IS_REFRESHING | PS_FIND_BASE;
2438                 /* syncprov_findbase expects to be called as a callback... */
2439                 sc.sc_private = &opc;
2440                 opc.son = on;
2441                 ldap_pvt_thread_mutex_init( &so.s_mutex );
2442                 cb = op->o_callback;
2443                 op->o_callback = &sc;
2444                 rs->sr_err = syncprov_findbase( op, &fc );
2445                 op->o_callback = cb;
2446                 ldap_pvt_thread_mutex_destroy( &so.s_mutex );
2447
2448                 if ( rs->sr_err != LDAP_SUCCESS ) {
2449                         send_ldap_result( op, rs );
2450                         return rs->sr_err;
2451                 }
2452                 sop = ch_malloc( sizeof( syncops ));
2453                 *sop = so;
2454                 ldap_pvt_thread_mutex_init( &sop->s_mutex );
2455                 sop->s_rid = srs->sr_state.rid;
2456                 sop->s_sid = srs->sr_state.sid;
2457                 sop->s_inuse = 1;
2458
2459                 ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
2460                 while ( si->si_active ) {
2461                         /* Wait for active mods to finish before proceeding, as they
2462                          * may already have inspected the si_ops list looking for
2463                          * consumers to replicate the change to.  Using the log
2464                          * doesn't help, as we may finish playing it before the
2465                          * active mods gets added to it.
2466                          */
2467                         ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
2468                         if ( slapd_shutdown )
2469                                 return SLAPD_ABANDON;
2470                         if ( !ldap_pvt_thread_pool_pausecheck( &connection_pool ))
2471                                 ldap_pvt_thread_yield();
2472                         ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
2473                 }
2474                 sop->s_next = si->si_ops;
2475                 si->si_ops = sop;
2476                 ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
2477         }
2478
2479         /* snapshot the ctxcsn */
2480         ldap_pvt_thread_rdwr_rlock( &si->si_csn_rwlock );
2481         numcsns = si->si_numcsns;
2482         if ( numcsns ) {
2483                 ber_bvarray_dup_x( &ctxcsn, si->si_ctxcsn, op->o_tmpmemctx );
2484                 sids = op->o_tmpalloc( numcsns * sizeof(int), op->o_tmpmemctx );
2485                 for ( i=0; i<numcsns; i++ )
2486                         sids[i] = si->si_sids[i];
2487         } else {
2488                 ctxcsn = NULL;
2489                 sids = NULL;
2490         }
2491         dirty = si->si_dirty;
2492         ldap_pvt_thread_rdwr_runlock( &si->si_csn_rwlock );
2493
2494         /* If we have a cookie, handle the PRESENT lookups */
2495         if ( srs->sr_state.ctxcsn ) {
2496                 sessionlog *sl;
2497                 int i, j;
2498
2499                 /* If we don't have any CSN of our own yet, pretend nothing
2500                  * has changed.
2501                  */
2502                 if ( !numcsns )
2503                         goto no_change;
2504
2505                 if ( !si->si_nopres )
2506                         do_present = SS_PRESENT;
2507
2508                 /* If there are SIDs we don't recognize in the cookie, drop them */
2509                 for (i=0; i<srs->sr_state.numcsns; ) {
2510                         for (j=0; j<numcsns; j++) {
2511                                 if ( srs->sr_state.sids[i] == sids[j] ) {
2512                                         break;
2513                                 }
2514                         }
2515                         /* not found */
2516                         if ( j == numcsns ) {
2517                                 struct berval tmp = srs->sr_state.ctxcsn[i];
2518                                 j = srs->sr_state.numcsns - 1;
2519                                 srs->sr_state.ctxcsn[i] = srs->sr_state.ctxcsn[j];
2520                                 tmp.bv_len = 0;
2521                                 srs->sr_state.ctxcsn[j] = tmp;
2522                                 srs->sr_state.numcsns = j;
2523                                 srs->sr_state.sids[i] = srs->sr_state.sids[j];
2524                                 continue;
2525                         }
2526                         i++;
2527                 }
2528
2529                 /* Find the smallest CSN */
2530                 mincsn = srs->sr_state.ctxcsn[0];
2531                 for ( i=1; i<srs->sr_state.numcsns; i++ ) {
2532                         if ( ber_bvcmp( &mincsn, &srs->sr_state.ctxcsn[i] ) > 0 )
2533                                 mincsn = srs->sr_state.ctxcsn[i];
2534                 }
2535
2536                 /* If nothing has changed, shortcut it */
2537                 if ( srs->sr_state.numcsns == numcsns ) {
2538                         int i, j, newer;
2539                         for ( i=0; i<srs->sr_state.numcsns; i++ ) {
2540                                 for ( j=0; j<numcsns; j++ ) {
2541                                         if ( srs->sr_state.sids[i] != sids[j] )
2542                                                 continue;
2543                                         newer = ber_bvcmp( &srs->sr_state.ctxcsn[i], &ctxcsn[j] );
2544                                         /* If our state is newer, tell consumer about changes */
2545                                         if ( newer < 0 )
2546                                                 changed = SS_CHANGED;
2547                                         else if ( newer > 0 ) {
2548                                         /* our state is older, complain to consumer */
2549                                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
2550                                                 rs->sr_text = "consumer state is newer than provider!";
2551 bailout:
2552                                                 if ( sop ) {
2553                                                         syncops **sp = &si->si_ops;
2554
2555                                                         ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
2556                                                         while ( *sp != sop )
2557                                                                 sp = &(*sp)->s_next;
2558                                                         *sp = sop->s_next;
2559                                                         ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
2560                                                         ch_free( sop );
2561                                                 }
2562                                                 rs->sr_ctrls = NULL;
2563                                                 send_ldap_result( op, rs );
2564                                                 return rs->sr_err;
2565                                         }
2566                                         break;
2567                                 }
2568                                 if ( changed )
2569                                         break;
2570                         }
2571                         if ( !changed && !dirty ) {
2572                                 do_present = 0;
2573 no_change:              if ( !(op->o_sync_mode & SLAP_SYNC_PERSIST) ) {
2574                                         LDAPControl     *ctrls[2];
2575
2576                                         ctrls[0] = NULL;
2577                                         ctrls[1] = NULL;
2578                                         syncprov_done_ctrl( op, rs, ctrls, 0, 0,
2579                                                 NULL, LDAP_SYNC_REFRESH_DELETES );
2580                                         rs->sr_ctrls = ctrls;
2581                                         rs->sr_err = LDAP_SUCCESS;
2582                                         send_ldap_result( op, rs );
2583                                         rs->sr_ctrls = NULL;
2584                                         return rs->sr_err;
2585                                 }
2586                                 goto shortcut;
2587                         }
2588                 } else {
2589                         /* consumer doesn't have the right number of CSNs */
2590                         changed = SS_CHANGED;
2591                 }
2592                 /* Do we have a sessionlog for this search? */
2593                 sl=si->si_logs;
2594                 if ( sl ) {
2595                         ldap_pvt_thread_mutex_lock( &sl->sl_mutex );
2596                         /* Are there any log entries, and is the consumer state
2597                          * present in the session log?
2598                          */
2599                         if ( sl->sl_num > 0 && ber_bvcmp( &mincsn, &sl->sl_head->se_csn ) >= 0 ) {
2600                                 do_present = 0;
2601                                 /* mutex is unlocked in playlog */
2602                                 syncprov_playlog( op, rs, sl, srs, ctxcsn, numcsns, sids );
2603                         } else {
2604                                 ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
2605                         }
2606                 }
2607                 /* Is the CSN still present in the database? */
2608                 if ( syncprov_findcsn( op, FIND_CSN ) != LDAP_SUCCESS ) {
2609                         /* No, so a reload is required */
2610                         /* the 2.2 consumer doesn't send this hint */
2611                         if ( si->si_usehint && srs->sr_rhint == 0 ) {
2612                                 if ( ctxcsn )
2613                                         ber_bvarray_free_x( ctxcsn, op->o_tmpmemctx );
2614                                 if ( sids )
2615                                         op->o_tmpfree( sids, op->o_tmpmemctx );
2616                                 rs->sr_err = LDAP_SYNC_REFRESH_REQUIRED;
2617                                 rs->sr_text = "sync cookie is stale";
2618                                 goto bailout;
2619                         }
2620                         if ( srs->sr_state.ctxcsn ) {
2621                                 ber_bvarray_free_x( srs->sr_state.ctxcsn, op->o_tmpmemctx );
2622                                 srs->sr_state.ctxcsn = NULL;
2623                         }
2624                         if ( srs->sr_state.sids ) {
2625                                 slap_sl_free( srs->sr_state.sids, op->o_tmpmemctx );
2626                                 srs->sr_state.sids = NULL;
2627                         }
2628                         srs->sr_state.numcsns = 0;
2629                 } else {
2630                         gotstate = 1;
2631                         /* If changed and doing Present lookup, send Present UUIDs */
2632                         if ( do_present && syncprov_findcsn( op, FIND_PRESENT ) !=
2633                                 LDAP_SUCCESS ) {
2634                                 if ( ctxcsn )
2635                                         ber_bvarray_free_x( ctxcsn, op->o_tmpmemctx );
2636                                 if ( sids )
2637                                         op->o_tmpfree( sids, op->o_tmpmemctx );
2638                                 goto bailout;
2639                         }
2640                 }
2641         } else {
2642                 /* No consumer state, assume something has changed */
2643                 changed = SS_CHANGED;
2644         }
2645
2646 shortcut:
2647         /* Append CSN range to search filter, save original filter
2648          * for persistent search evaluation
2649          */
2650         if ( sop ) {
2651                 sop->s_filterstr= op->ors_filterstr;
2652         }
2653
2654         /* If something changed, find the changes */
2655         if ( gotstate && ( changed || dirty ) ) {
2656                 Filter *fand, *fava;
2657
2658                 fand = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
2659                 fand->f_choice = LDAP_FILTER_AND;
2660                 fand->f_next = NULL;
2661                 fava = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
2662                 fand->f_and = fava;
2663                 fava->f_choice = LDAP_FILTER_GE;
2664                 fava->f_ava = op->o_tmpalloc( sizeof(AttributeAssertion), op->o_tmpmemctx );
2665                 fava->f_ava->aa_desc = slap_schema.si_ad_entryCSN;
2666 #ifdef LDAP_COMP_MATCH
2667                 fava->f_ava->aa_cf = NULL;
2668 #endif
2669                 ber_dupbv_x( &fava->f_ava->aa_value, &mincsn, op->o_tmpmemctx );
2670                 fava->f_next = op->ors_filter;
2671                 if ( sop )
2672                         ldap_pvt_thread_mutex_lock( &sop->s_mutex );
2673                 op->ors_filter = fand;
2674                 filter2bv_x( op, op->ors_filter, &op->ors_filterstr );
2675                 if ( sop ) {
2676                         sop->s_flags |= PS_FIX_FILTER;
2677                         ldap_pvt_thread_mutex_unlock( &sop->s_mutex );
2678                 }
2679         }
2680
2681         /* Let our callback add needed info to returned entries */
2682         cb = op->o_tmpcalloc(1, sizeof(slap_callback)+sizeof(searchstate), op->o_tmpmemctx);
2683         ss = (searchstate *)(cb+1);
2684         ss->ss_on = on;
2685         ss->ss_so = sop;
2686         ss->ss_flags = do_present | changed;
2687         ss->ss_ctxcsn = ctxcsn;
2688         ss->ss_numcsns = numcsns;
2689         ss->ss_sids = sids;
2690         cb->sc_response = syncprov_search_response;
2691         cb->sc_cleanup = syncprov_search_cleanup;
2692         cb->sc_private = ss;
2693         cb->sc_next = op->o_callback;
2694         op->o_callback = cb;
2695
2696         /* If this is a persistent search and no changes were reported during
2697          * the refresh phase, just invoke the response callback to transition
2698          * us into persist phase
2699          */
2700         if ( !changed && !dirty ) {
2701                 rs->sr_err = LDAP_SUCCESS;
2702                 rs->sr_nentries = 0;
2703                 send_ldap_result( op, rs );
2704                 return rs->sr_err;
2705         }
2706         return SLAP_CB_CONTINUE;
2707 }
2708
2709 static int
2710 syncprov_operational(
2711         Operation *op,
2712         SlapReply *rs )
2713 {
2714         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
2715         syncprov_info_t         *si = (syncprov_info_t *)on->on_bi.bi_private;
2716
2717         /* This prevents generating unnecessarily; frontend will strip
2718          * any statically stored copy.
2719          */
2720         if ( op->o_sync != SLAP_CONTROL_NONE )
2721                 return SLAP_CB_CONTINUE;
2722
2723         if ( rs->sr_entry &&
2724                 dn_match( &rs->sr_entry->e_nname, &si->si_contextdn )) {
2725
2726                 if ( SLAP_OPATTRS( rs->sr_attr_flags ) ||
2727                         ad_inlist( slap_schema.si_ad_contextCSN, rs->sr_attrs )) {
2728                         Attribute *a, **ap = NULL;
2729
2730                         for ( a=rs->sr_entry->e_attrs; a; a=a->a_next ) {
2731                                 if ( a->a_desc == slap_schema.si_ad_contextCSN )
2732                                         break;
2733                         }
2734
2735                         ldap_pvt_thread_rdwr_rlock( &si->si_csn_rwlock );
2736                         if ( si->si_ctxcsn ) {
2737                                 if ( !a ) {
2738                                         for ( ap = &rs->sr_operational_attrs; *ap;
2739                                                 ap=&(*ap)->a_next );
2740
2741                                         a = attr_alloc( slap_schema.si_ad_contextCSN );
2742                                         *ap = a;
2743                                 }
2744
2745                                 if ( !ap ) {
2746                                         if ( rs_ensure_entry_modifiable( op, rs, on )) {
2747                                                 a = attr_find( rs->sr_entry->e_attrs,
2748                                                         slap_schema.si_ad_contextCSN );
2749                                         }
2750                                         if ( a->a_nvals != a->a_vals ) {
2751                                                 ber_bvarray_free( a->a_nvals );
2752                                         }
2753                                         a->a_nvals = NULL;
2754                                         ber_bvarray_free( a->a_vals );
2755                                         a->a_vals = NULL;
2756                                         a->a_numvals = 0;
2757                                 }
2758                                 attr_valadd( a, si->si_ctxcsn, si->si_ctxcsn, si->si_numcsns );
2759                         }
2760                         ldap_pvt_thread_rdwr_runlock( &si->si_csn_rwlock );
2761                 }
2762         }
2763         return SLAP_CB_CONTINUE;
2764 }
2765
2766 enum {
2767         SP_CHKPT = 1,
2768         SP_SESSL,
2769         SP_NOPRES,
2770         SP_USEHINT
2771 };
2772
2773 static ConfigDriver sp_cf_gen;
2774
2775 static ConfigTable spcfg[] = {
2776         { "syncprov-checkpoint", "ops> <minutes", 3, 3, 0, ARG_MAGIC|SP_CHKPT,
2777                 sp_cf_gen, "( OLcfgOvAt:1.1 NAME 'olcSpCheckpoint' "
2778                         "DESC 'ContextCSN checkpoint interval in ops and minutes' "
2779                         "SYNTAX OMsDirectoryString SINGLE-VALUE )", NULL, NULL },
2780         { "syncprov-sessionlog", "ops", 2, 2, 0, ARG_INT|ARG_MAGIC|SP_SESSL,
2781                 sp_cf_gen, "( OLcfgOvAt:1.2 NAME 'olcSpSessionlog' "
2782                         "DESC 'Session log size in ops' "
2783                         "SYNTAX OMsInteger SINGLE-VALUE )", NULL, NULL },
2784         { "syncprov-nopresent", NULL, 2, 2, 0, ARG_ON_OFF|ARG_MAGIC|SP_NOPRES,
2785                 sp_cf_gen, "( OLcfgOvAt:1.3 NAME 'olcSpNoPresent' "
2786                         "DESC 'Omit Present phase processing' "
2787                         "SYNTAX OMsBoolean SINGLE-VALUE )", NULL, NULL },
2788         { "syncprov-reloadhint", NULL, 2, 2, 0, ARG_ON_OFF|ARG_MAGIC|SP_USEHINT,
2789                 sp_cf_gen, "( OLcfgOvAt:1.4 NAME 'olcSpReloadHint' "
2790                         "DESC 'Observe Reload Hint in Request control' "
2791                         "SYNTAX OMsBoolean SINGLE-VALUE )", NULL, NULL },
2792         { NULL, NULL, 0, 0, 0, ARG_IGNORED }
2793 };
2794
2795 static ConfigOCs spocs[] = {
2796         { "( OLcfgOvOc:1.1 "
2797                 "NAME 'olcSyncProvConfig' "
2798                 "DESC 'SyncRepl Provider configuration' "
2799                 "SUP olcOverlayConfig "
2800                 "MAY ( olcSpCheckpoint "
2801                         "$ olcSpSessionlog "
2802                         "$ olcSpNoPresent "
2803                         "$ olcSpReloadHint "
2804                 ") )",
2805                         Cft_Overlay, spcfg },
2806         { NULL, 0, NULL }
2807 };
2808
2809 static int
2810 sp_cf_gen(ConfigArgs *c)
2811 {
2812         slap_overinst           *on = (slap_overinst *)c->bi;
2813         syncprov_info_t         *si = (syncprov_info_t *)on->on_bi.bi_private;
2814         int rc = 0;
2815
2816         if ( c->op == SLAP_CONFIG_EMIT ) {
2817                 switch ( c->type ) {
2818                 case SP_CHKPT:
2819                         if ( si->si_chkops || si->si_chktime ) {
2820                                 struct berval bv;
2821                                 /* we assume si_chktime is a multiple of 60
2822                                  * because the parsed value was originally
2823                                  * multiplied by 60 */
2824                                 bv.bv_len = snprintf( c->cr_msg, sizeof( c->cr_msg ),
2825                                         "%d %d", si->si_chkops, si->si_chktime/60 );
2826                                 if ( bv.bv_len >= sizeof( c->cr_msg ) ) {
2827                                         rc = 1;
2828                                 } else {
2829                                         bv.bv_val = c->cr_msg;
2830                                         value_add_one( &c->rvalue_vals, &bv );
2831                                 }
2832                         } else {
2833                                 rc = 1;
2834                         }
2835                         break;
2836                 case SP_SESSL:
2837                         if ( si->si_logs ) {
2838                                 c->value_int = si->si_logs->sl_size;
2839                         } else {
2840                                 rc = 1;
2841                         }
2842                         break;
2843                 case SP_NOPRES:
2844                         if ( si->si_nopres ) {
2845                                 c->value_int = 1;
2846                         } else {
2847                                 rc = 1;
2848                         }
2849                         break;
2850                 case SP_USEHINT:
2851                         if ( si->si_usehint ) {
2852                                 c->value_int = 1;
2853                         } else {
2854                                 rc = 1;
2855                         }
2856                         break;
2857                 }
2858                 return rc;
2859         } else if ( c->op == LDAP_MOD_DELETE ) {
2860                 switch ( c->type ) {
2861                 case SP_CHKPT:
2862                         si->si_chkops = 0;
2863                         si->si_chktime = 0;
2864                         break;
2865                 case SP_SESSL:
2866                         if ( si->si_logs )
2867                                 si->si_logs->sl_size = 0;
2868                         else
2869                                 rc = LDAP_NO_SUCH_ATTRIBUTE;
2870                         break;
2871                 case SP_NOPRES:
2872                         if ( si->si_nopres )
2873                                 si->si_nopres = 0;
2874                         else
2875                                 rc = LDAP_NO_SUCH_ATTRIBUTE;
2876                         break;
2877                 case SP_USEHINT:
2878                         if ( si->si_usehint )
2879                                 si->si_usehint = 0;
2880                         else
2881                                 rc = LDAP_NO_SUCH_ATTRIBUTE;
2882                         break;
2883                 }
2884                 return rc;
2885         }
2886         switch ( c->type ) {
2887         case SP_CHKPT:
2888                 if ( lutil_atoi( &si->si_chkops, c->argv[1] ) != 0 ) {
2889                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s unable to parse checkpoint ops # \"%s\"",
2890                                 c->argv[0], c->argv[1] );
2891                         Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
2892                                 "%s: %s\n", c->log, c->cr_msg, 0 );
2893                         return ARG_BAD_CONF;
2894                 }
2895                 if ( si->si_chkops <= 0 ) {
2896                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s invalid checkpoint ops # \"%d\"",
2897                                 c->argv[0], si->si_chkops );
2898                         Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
2899                                 "%s: %s\n", c->log, c->cr_msg, 0 );
2900                         return ARG_BAD_CONF;
2901                 }
2902                 if ( lutil_atoi( &si->si_chktime, c->argv[2] ) != 0 ) {
2903                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s unable to parse checkpoint time \"%s\"",
2904                                 c->argv[0], c->argv[1] );
2905                         Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
2906                                 "%s: %s\n", c->log, c->cr_msg, 0 );
2907                         return ARG_BAD_CONF;
2908                 }
2909                 if ( si->si_chktime <= 0 ) {
2910                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s invalid checkpoint time \"%d\"",
2911                                 c->argv[0], si->si_chkops );
2912                         Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
2913                                 "%s: %s\n", c->log, c->cr_msg, 0 );
2914                         return ARG_BAD_CONF;
2915                 }
2916                 si->si_chktime *= 60;
2917                 break;
2918         case SP_SESSL: {
2919                 sessionlog *sl;
2920                 int size = c->value_int;
2921
2922                 if ( size < 0 ) {
2923                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s size %d is negative",
2924                                 c->argv[0], size );
2925                         Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
2926                                 "%s: %s\n", c->log, c->cr_msg, 0 );
2927                         return ARG_BAD_CONF;
2928                 }
2929                 sl = si->si_logs;
2930                 if ( !sl ) {
2931                         sl = ch_malloc( sizeof( sessionlog ) );
2932                         sl->sl_num = 0;
2933                         sl->sl_head = sl->sl_tail = NULL;
2934                         ldap_pvt_thread_mutex_init( &sl->sl_mutex );
2935                         si->si_logs = sl;
2936                 }
2937                 sl->sl_size = size;
2938                 }
2939                 break;
2940         case SP_NOPRES:
2941                 si->si_nopres = c->value_int;
2942                 break;
2943         case SP_USEHINT:
2944                 si->si_usehint = c->value_int;
2945                 break;
2946         }
2947         return rc;
2948 }
2949
2950 /* ITS#3456 we cannot run this search on the main thread, must use a
2951  * child thread in order to insure we have a big enough stack.
2952  */
2953 static void *
2954 syncprov_db_otask(
2955         void *ptr
2956 )
2957 {
2958         syncprov_findcsn( ptr, FIND_MAXCSN );
2959         return NULL;
2960 }
2961
2962 /* Read any existing contextCSN from the underlying db.
2963  * Then search for any entries newer than that. If no value exists,
2964  * just generate it. Cache whatever result.
2965  */
2966 static int
2967 syncprov_db_open(
2968         BackendDB *be,
2969         ConfigReply *cr
2970 )
2971 {
2972         slap_overinst   *on = (slap_overinst *) be->bd_info;
2973         syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
2974
2975         Connection conn = { 0 };
2976         OperationBuffer opbuf;
2977         Operation *op;
2978         Entry *e = NULL;
2979         Attribute *a;
2980         int rc;
2981         void *thrctx = NULL;
2982
2983         if ( !SLAP_LASTMOD( be )) {
2984                 Debug( LDAP_DEBUG_ANY,
2985                         "syncprov_db_open: invalid config, lastmod must be enabled\n", 0, 0, 0 );
2986                 return -1;
2987         }
2988
2989         if ( slapMode & SLAP_TOOL_MODE ) {
2990                 return 0;
2991         }
2992
2993         rc = overlay_register_control( be, LDAP_CONTROL_SYNC );
2994         if ( rc ) {
2995                 return rc;
2996         }
2997
2998         thrctx = ldap_pvt_thread_pool_context();
2999         connection_fake_init2( &conn, &opbuf, thrctx, 0 );
3000         op = &opbuf.ob_op;
3001         op->o_bd = be;
3002         op->o_dn = be->be_rootdn;
3003         op->o_ndn = be->be_rootndn;
3004
3005         if ( SLAP_SYNC_SUBENTRY( be )) {
3006                 build_new_dn( &si->si_contextdn, be->be_nsuffix,
3007                         (struct berval *)&slap_ldapsync_cn_bv, NULL );
3008         } else {
3009                 si->si_contextdn = be->be_nsuffix[0];
3010         }
3011         rc = overlay_entry_get_ov( op, &si->si_contextdn, NULL,
3012                 slap_schema.si_ad_contextCSN, 0, &e, on );
3013
3014         if ( e ) {
3015                 ldap_pvt_thread_t tid;
3016
3017                 a = attr_find( e->e_attrs, slap_schema.si_ad_contextCSN );
3018                 if ( a ) {
3019                         ber_bvarray_dup_x( &si->si_ctxcsn, a->a_vals, NULL );
3020                         si->si_numcsns = a->a_numvals;
3021                         si->si_sids = slap_parse_csn_sids( si->si_ctxcsn, a->a_numvals, NULL );
3022                 }
3023                 overlay_entry_release_ov( op, e, 0, on );
3024                 if ( si->si_ctxcsn && !SLAP_DBCLEAN( be )) {
3025                         op->o_req_dn = be->be_suffix[0];
3026                         op->o_req_ndn = be->be_nsuffix[0];
3027                         op->ors_scope = LDAP_SCOPE_SUBTREE;
3028                         ldap_pvt_thread_create( &tid, 0, syncprov_db_otask, op );
3029                         ldap_pvt_thread_join( tid, NULL );
3030                 }
3031         }
3032
3033         /* Didn't find a contextCSN, should we generate one? */
3034         if ( !si->si_ctxcsn ) {
3035                 char csnbuf[ LDAP_PVT_CSNSTR_BUFSIZE ];
3036                 struct berval csn;
3037
3038                 if ( SLAP_SYNC_SHADOW( op->o_bd )) {
3039                 /* If we're also a consumer, then don't generate anything.
3040                  * Wait for our provider to send it to us, or for a local
3041                  * modify if we have multimaster.
3042                  */
3043                         goto out;
3044                 }
3045                 csn.bv_val = csnbuf;
3046                 csn.bv_len = sizeof( csnbuf );
3047                 slap_get_csn( op, &csn, 0 );
3048                 value_add_one( &si->si_ctxcsn, &csn );
3049                 si->si_numcsns = 1;
3050                 si->si_sids = ch_malloc( sizeof(int) );
3051                 si->si_sids[0] = slap_serverID;
3052
3053                 /* make sure we do a checkpoint on close */
3054                 si->si_numops++;
3055         }
3056
3057 out:
3058         op->o_bd->bd_info = (BackendInfo *)on;
3059         return 0;
3060 }
3061
3062 /* Write the current contextCSN into the underlying db.
3063  */
3064 static int
3065 syncprov_db_close(
3066         BackendDB *be,
3067         ConfigReply *cr
3068 )
3069 {
3070     slap_overinst   *on = (slap_overinst *) be->bd_info;
3071     syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
3072 #ifdef SLAP_CONFIG_DELETE
3073         syncops *so, *sonext;
3074 #endif /* SLAP_CONFIG_DELETE */
3075
3076         if ( slapMode & SLAP_TOOL_MODE ) {
3077                 return 0;
3078         }
3079         if ( si->si_numops ) {
3080                 Connection conn = {0};
3081                 OperationBuffer opbuf;
3082                 Operation *op;
3083                 void *thrctx;
3084
3085                 thrctx = ldap_pvt_thread_pool_context();
3086                 connection_fake_init2( &conn, &opbuf, thrctx, 0 );
3087                 op = &opbuf.ob_op;
3088                 op->o_bd = be;
3089                 op->o_dn = be->be_rootdn;
3090                 op->o_ndn = be->be_rootndn;
3091                 syncprov_checkpoint( op, on );
3092         }
3093
3094 #ifdef SLAP_CONFIG_DELETE
3095         ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
3096         for ( so=si->si_ops, sonext=so;  so; so=sonext  ) {
3097                 SlapReply rs = {REP_RESULT};
3098                 rs.sr_err = LDAP_UNAVAILABLE;
3099                 send_ldap_result( so->s_op, &rs );
3100                 sonext=so->s_next;
3101                 syncprov_drop_psearch( so, 0);
3102         }
3103         si->si_ops=NULL;
3104         ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
3105         overlay_unregister_control( be, LDAP_CONTROL_SYNC );
3106 #endif /* SLAP_CONFIG_DELETE */
3107
3108     return 0;
3109 }
3110
3111 static int
3112 syncprov_db_init(
3113         BackendDB *be,
3114         ConfigReply *cr
3115 )
3116 {
3117         slap_overinst   *on = (slap_overinst *)be->bd_info;
3118         syncprov_info_t *si;
3119
3120         if ( SLAP_ISGLOBALOVERLAY( be ) ) {
3121                 Debug( LDAP_DEBUG_ANY,
3122                         "syncprov must be instantiated within a database.\n",
3123                         0, 0, 0 );
3124                 return 1;
3125         }
3126
3127         si = ch_calloc(1, sizeof(syncprov_info_t));
3128         on->on_bi.bi_private = si;
3129         ldap_pvt_thread_rdwr_init( &si->si_csn_rwlock );
3130         ldap_pvt_thread_mutex_init( &si->si_ops_mutex );
3131         ldap_pvt_thread_mutex_init( &si->si_mods_mutex );
3132         ldap_pvt_thread_mutex_init( &si->si_resp_mutex );
3133
3134         csn_anlist[0].an_desc = slap_schema.si_ad_entryCSN;
3135         csn_anlist[0].an_name = slap_schema.si_ad_entryCSN->ad_cname;
3136         csn_anlist[1].an_desc = slap_schema.si_ad_entryUUID;
3137         csn_anlist[1].an_name = slap_schema.si_ad_entryUUID->ad_cname;
3138
3139         uuid_anlist[0].an_desc = slap_schema.si_ad_entryUUID;
3140         uuid_anlist[0].an_name = slap_schema.si_ad_entryUUID->ad_cname;
3141
3142         return 0;
3143 }
3144
3145 static int
3146 syncprov_db_destroy(
3147         BackendDB *be,
3148         ConfigReply *cr
3149 )
3150 {
3151         slap_overinst   *on = (slap_overinst *)be->bd_info;
3152         syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
3153
3154         if ( si ) {
3155                 if ( si->si_logs ) {
3156                         slog_entry *se = si->si_logs->sl_head;
3157
3158                         while ( se ) {
3159                                 slog_entry *se_next = se->se_next;
3160                                 ch_free( se );
3161                                 se = se_next;
3162                         }
3163
3164                         ldap_pvt_thread_mutex_destroy(&si->si_logs->sl_mutex);
3165                         ch_free( si->si_logs );
3166                 }
3167                 if ( si->si_ctxcsn )
3168                         ber_bvarray_free( si->si_ctxcsn );
3169                 if ( si->si_sids )
3170                         ch_free( si->si_sids );
3171                 ldap_pvt_thread_mutex_destroy( &si->si_resp_mutex );
3172                 ldap_pvt_thread_mutex_destroy( &si->si_mods_mutex );
3173                 ldap_pvt_thread_mutex_destroy( &si->si_ops_mutex );
3174                 ldap_pvt_thread_rdwr_destroy( &si->si_csn_rwlock );
3175                 ch_free( si );
3176         }
3177
3178         return 0;
3179 }
3180
3181 static int syncprov_parseCtrl (
3182         Operation *op,
3183         SlapReply *rs,
3184         LDAPControl *ctrl )
3185 {
3186         ber_tag_t tag;
3187         BerElementBuffer berbuf;
3188         BerElement *ber = (BerElement *)&berbuf;
3189         ber_int_t mode;
3190         ber_len_t len;
3191         struct berval cookie = BER_BVNULL;
3192         sync_control *sr;
3193         int rhint = 0;
3194
3195         if ( op->o_sync != SLAP_CONTROL_NONE ) {
3196                 rs->sr_text = "Sync control specified multiple times";
3197                 return LDAP_PROTOCOL_ERROR;
3198         }
3199
3200         if ( op->o_pagedresults != SLAP_CONTROL_NONE ) {
3201                 rs->sr_text = "Sync control specified with pagedResults control";
3202                 return LDAP_PROTOCOL_ERROR;
3203         }
3204
3205         if ( BER_BVISNULL( &ctrl->ldctl_value ) ) {
3206                 rs->sr_text = "Sync control value is absent";
3207                 return LDAP_PROTOCOL_ERROR;
3208         }
3209
3210         if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
3211                 rs->sr_text = "Sync control value is empty";
3212                 return LDAP_PROTOCOL_ERROR;
3213         }
3214
3215         /* Parse the control value
3216          *      syncRequestValue ::= SEQUENCE {
3217          *              mode   ENUMERATED {
3218          *                      -- 0 unused
3219          *                      refreshOnly             (1),
3220          *                      -- 2 reserved
3221          *                      refreshAndPersist       (3)
3222          *              },
3223          *              cookie  syncCookie OPTIONAL
3224          *      }
3225          */
3226
3227         ber_init2( ber, &ctrl->ldctl_value, 0 );
3228
3229         if ( (tag = ber_scanf( ber, "{i" /*}*/, &mode )) == LBER_ERROR ) {
3230                 rs->sr_text = "Sync control : mode decoding error";
3231                 return LDAP_PROTOCOL_ERROR;
3232         }
3233
3234         switch( mode ) {
3235         case LDAP_SYNC_REFRESH_ONLY:
3236                 mode = SLAP_SYNC_REFRESH;
3237                 break;
3238         case LDAP_SYNC_REFRESH_AND_PERSIST:
3239                 mode = SLAP_SYNC_REFRESH_AND_PERSIST;
3240                 break;
3241         default:
3242                 rs->sr_text = "Sync control : unknown update mode";
3243                 return LDAP_PROTOCOL_ERROR;
3244         }
3245
3246         tag = ber_peek_tag( ber, &len );
3247
3248         if ( tag == LDAP_TAG_SYNC_COOKIE ) {
3249                 if (( ber_scanf( ber, /*{*/ "m", &cookie )) == LBER_ERROR ) {
3250                         rs->sr_text = "Sync control : cookie decoding error";
3251                         return LDAP_PROTOCOL_ERROR;
3252                 }
3253                 tag = ber_peek_tag( ber, &len );
3254         }
3255         if ( tag == LDAP_TAG_RELOAD_HINT ) {
3256                 if (( ber_scanf( ber, /*{*/ "b", &rhint )) == LBER_ERROR ) {
3257                         rs->sr_text = "Sync control : rhint decoding error";
3258                         return LDAP_PROTOCOL_ERROR;
3259                 }
3260         }
3261         if (( ber_scanf( ber, /*{*/ "}")) == LBER_ERROR ) {
3262                         rs->sr_text = "Sync control : decoding error";
3263                         return LDAP_PROTOCOL_ERROR;
3264         }
3265         sr = op->o_tmpcalloc( 1, sizeof(struct sync_control), op->o_tmpmemctx );
3266         sr->sr_rhint = rhint;
3267         if (!BER_BVISNULL(&cookie)) {
3268                 ber_dupbv_x( &sr->sr_state.octet_str, &cookie, op->o_tmpmemctx );
3269                 /* If parse fails, pretend no cookie was sent */
3270                 if ( slap_parse_sync_cookie( &sr->sr_state, op->o_tmpmemctx ) ||
3271                         sr->sr_state.rid == -1 ) {
3272                         if ( sr->sr_state.ctxcsn ) {
3273                                 ber_bvarray_free_x( sr->sr_state.ctxcsn, op->o_tmpmemctx );
3274                                 sr->sr_state.ctxcsn = NULL;
3275                         }
3276                         sr->sr_state.numcsns = 0;
3277                 }
3278         }
3279
3280         op->o_controls[slap_cids.sc_LDAPsync] = sr;
3281
3282         op->o_sync = ctrl->ldctl_iscritical
3283                 ? SLAP_CONTROL_CRITICAL
3284                 : SLAP_CONTROL_NONCRITICAL;
3285
3286         op->o_sync_mode |= mode;        /* o_sync_mode shares o_sync */
3287
3288         return LDAP_SUCCESS;
3289 }
3290
3291 /* This overlay is set up for dynamic loading via moduleload. For static
3292  * configuration, you'll need to arrange for the slap_overinst to be
3293  * initialized and registered by some other function inside slapd.
3294  */
3295
3296 static slap_overinst            syncprov;
3297
3298 int
3299 syncprov_initialize()
3300 {
3301         int rc;
3302
3303         rc = register_supported_control( LDAP_CONTROL_SYNC,
3304                 SLAP_CTRL_SEARCH, NULL,
3305                 syncprov_parseCtrl, &slap_cids.sc_LDAPsync );
3306         if ( rc != LDAP_SUCCESS ) {
3307                 Debug( LDAP_DEBUG_ANY,
3308                         "syncprov_init: Failed to register control %d\n", rc, 0, 0 );
3309                 return rc;
3310         }
3311
3312         syncprov.on_bi.bi_type = "syncprov";
3313         syncprov.on_bi.bi_db_init = syncprov_db_init;
3314         syncprov.on_bi.bi_db_destroy = syncprov_db_destroy;
3315         syncprov.on_bi.bi_db_open = syncprov_db_open;
3316         syncprov.on_bi.bi_db_close = syncprov_db_close;
3317
3318         syncprov.on_bi.bi_op_abandon = syncprov_op_abandon;
3319         syncprov.on_bi.bi_op_cancel = syncprov_op_abandon;
3320
3321         syncprov.on_bi.bi_op_add = syncprov_op_mod;
3322         syncprov.on_bi.bi_op_compare = syncprov_op_compare;
3323         syncprov.on_bi.bi_op_delete = syncprov_op_mod;
3324         syncprov.on_bi.bi_op_modify = syncprov_op_mod;
3325         syncprov.on_bi.bi_op_modrdn = syncprov_op_mod;
3326         syncprov.on_bi.bi_op_search = syncprov_op_search;
3327         syncprov.on_bi.bi_extended = syncprov_op_extended;
3328         syncprov.on_bi.bi_operational = syncprov_operational;
3329
3330         syncprov.on_bi.bi_cf_ocs = spocs;
3331
3332         generic_filter.f_desc = slap_schema.si_ad_objectClass;
3333
3334         rc = config_register_schema( spcfg, spocs );
3335         if ( rc ) return rc;
3336
3337         return overlay_register( &syncprov );
3338 }
3339
3340 #if SLAPD_OVER_SYNCPROV == SLAPD_MOD_DYNAMIC
3341 int
3342 init_module( int argc, char *argv[] )
3343 {
3344         return syncprov_initialize();
3345 }
3346 #endif /* SLAPD_OVER_SYNCPROV == SLAPD_MOD_DYNAMIC */
3347
3348 #endif /* defined(SLAPD_OVER_SYNCPROV) */