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 2004-2010 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                                 goto again;
 739                         }
 740                         rc = LDAP_NO_SUCH_OBJECT;
 741                 }
 742                 break;
 743         case FIND_PRESENT:
 744                 op->o_tmpfree( pcookie.uuids, op->o_tmpmemctx );
 745                 break;
 746         }
 747
 748         return rc;
 749 }
 750
 751 /* Should find a place to cache these */
 752 static mutexint *get_mutexint()
 753 {
 754         mutexint *mi = ch_malloc( sizeof( mutexint ));
 755         ldap_pvt_thread_mutex_init( &mi->mi_mutex );
 756         mi->mi_int = 1;
 757         return mi;
 758 }
 759
 760 static void inc_mutexint( mutexint *mi )
 761 {
 762         ldap_pvt_thread_mutex_lock( &mi->mi_mutex );
 763         mi->mi_int++;
 764         ldap_pvt_thread_mutex_unlock( &mi->mi_mutex );
 765 }
 766
 767 /* return resulting counter */
 768 static int dec_mutexint( mutexint *mi )
 769 {
 770         int i;
 771         ldap_pvt_thread_mutex_lock( &mi->mi_mutex );
 772         i = --mi->mi_int;
 773         ldap_pvt_thread_mutex_unlock( &mi->mi_mutex );
 774         if ( !i ) {
 775                 ldap_pvt_thread_mutex_destroy( &mi->mi_mutex );
 776                 ch_free( mi );
 777         }
 778         return i;
 779 }
 780
 781 static void
 782 syncprov_free_syncop( syncops *so )
 783 {
 784         syncres *sr, *srnext;
 785         GroupAssertion *ga, *gnext;
 786
 787         ldap_pvt_thread_mutex_lock( &so->s_mutex );
 788         /* already being freed, or still in use */
 789         if ( !so->s_inuse || --so->s_inuse > 0 ) {
 790                 ldap_pvt_thread_mutex_unlock( &so->s_mutex );
 791                 return;
 792         }
 793         ldap_pvt_thread_mutex_unlock( &so->s_mutex );
 794         if ( so->s_flags & PS_IS_DETACHED ) {
 795                 filter_free( so->s_op->ors_filter );
 796                 for ( ga = so->s_op->o_groups; ga; ga=gnext ) {
 797                         gnext = ga->ga_next;
 798                         ch_free( ga );
 799                 }
 800                 ch_free( so->s_op );
 801         }
 802         ch_free( so->s_base.bv_val );
 803         for ( sr=so->s_res; sr; sr=srnext ) {
 804                 srnext = sr->s_next;
 805                 if ( sr->s_e ) {
 806                         if ( !dec_mutexint( sr->s_e->e_private )) {
 807                                 sr->s_e->e_private = NULL;
 808                                 entry_free( sr->s_e );
 809                         }
 810                 }
 811                 ch_free( sr );
 812         }
 813         ldap_pvt_thread_mutex_destroy( &so->s_mutex );
 814         ch_free( so );
 815 }
 816
 817 /* Send a persistent search response */
 818 static int
 819 syncprov_sendresp( Operation *op, opcookie *opc, syncops *so, int mode )
 820 {
 821         slap_overinst *on = opc->son;
 822
 823         SlapReply rs = { REP_SEARCH };
 824         LDAPControl *ctrls[2];
 825         struct berval cookie = BER_BVNULL, csns[2];
 826         Entry e_uuid = {0};
 827         Attribute a_uuid = {0};
 828
 829         if ( so->s_op->o_abandon )
 830                 return SLAPD_ABANDON;
 831
 832         ctrls[1] = NULL;
 833         if ( !BER_BVISNULL( &opc->sctxcsn )) {
 834                 csns[0] = opc->sctxcsn;
 835                 BER_BVZERO( &csns[1] );
 836                 slap_compose_sync_cookie( op, &cookie, csns, so->s_rid, slap_serverID ? slap_serverID : -1 );
 837         }
 838
 839 #ifdef LDAP_DEBUG
 840         if ( so->s_sid > 0 ) {
 841                 Debug( LDAP_DEBUG_SYNC, "syncprov_sendresp: to=%03x, cookie=%s\n",
 842                         so->s_sid, cookie.bv_val ? cookie.bv_val : "", 0 );
 843         } else {
 844                 Debug( LDAP_DEBUG_SYNC, "syncprov_sendresp: cookie=%s\n",
 845                         cookie.bv_val ? cookie.bv_val : "", 0, 0 );
 846         }
 847 #endif
 848
 849         e_uuid.e_attrs = &a_uuid;
 850         a_uuid.a_desc = slap_schema.si_ad_entryUUID;
 851         a_uuid.a_nvals = &opc->suuid;
 852         rs.sr_err = syncprov_state_ctrl( op, &rs, &e_uuid,
 853                 mode, ctrls, 0, 1, &cookie );
 854         if ( !BER_BVISNULL( &cookie )) {
 855                 op->o_tmpfree( cookie.bv_val, op->o_tmpmemctx );
 856         }
 857
 858         rs.sr_ctrls = ctrls;
 859         rs.sr_entry = &e_uuid;
 860         if ( mode == LDAP_SYNC_ADD || mode == LDAP_SYNC_MODIFY ) {
 861                 e_uuid = *opc->se;
 862                 e_uuid.e_private = NULL;
 863         }
 864
 865         switch( mode ) {
 866         case LDAP_SYNC_ADD:
 867                 if ( opc->sreference && so->s_op->o_managedsait <= SLAP_CONTROL_IGNORED ) {
 868                         rs.sr_ref = get_entry_referrals( op, rs.sr_entry );
 869                         rs.sr_err = send_search_reference( op, &rs );
 870                         ber_bvarray_free( rs.sr_ref );
 871                         break;
 872                 }
 873                 /* fallthru */
 874         case LDAP_SYNC_MODIFY:
 875                 rs.sr_attrs = op->ors_attrs;
 876                 rs.sr_err = send_search_entry( op, &rs );
 877                 break;
 878         case LDAP_SYNC_DELETE:
 879                 e_uuid.e_attrs = NULL;
 880                 e_uuid.e_name = opc->sdn;
 881                 e_uuid.e_nname = opc->sndn;
 882                 if ( opc->sreference && so->s_op->o_managedsait <= SLAP_CONTROL_IGNORED ) {
 883                         struct berval bv = BER_BVNULL;
 884                         rs.sr_ref = &bv;
 885                         rs.sr_err = send_search_reference( op, &rs );
 886                 } else {
 887                         rs.sr_err = send_search_entry( op, &rs );
 888                 }
 889                 break;
 890         default:
 891                 assert(0);
 892         }
 893         /* In case someone else freed it already? */
 894         if ( rs.sr_ctrls ) {
 895                 int i;
 896                 for ( i=0; rs.sr_ctrls[i]; i++ ) {
 897                         if ( rs.sr_ctrls[i] == ctrls[0] ) {
 898                                 op->o_tmpfree( ctrls[0]->ldctl_value.bv_val, op->o_tmpmemctx );
 899                                 ctrls[0]->ldctl_value.bv_val = NULL;
 900                                 break;
 901                         }
 902                 }
 903                 rs.sr_ctrls = NULL;
 904         }
 905
 906         return rs.sr_err;
 907 }
 908
 909 static void
 910 syncprov_qstart( syncops *so );
 911
 912 /* Play back queued responses */
 913 static int
 914 syncprov_qplay( Operation *op, syncops *so )
 915 {
 916         slap_overinst *on = LDAP_SLIST_FIRST(&so->s_op->o_extra)->oe_key;
 917         syncres *sr;
 918         Entry *e;
 919         opcookie opc;
 920         int rc = 0;
 921
 922         opc.son = on;
 923
 924         do {
 925                 ldap_pvt_thread_mutex_lock( &so->s_mutex );
 926                 sr = so->s_res;
 927                 if ( sr )
 928                         so->s_res = sr->s_next;
 929                 if ( !so->s_res )
 930                         so->s_restail = NULL;
 931                 /* Exit loop with mutex held */
 932                 if ( !sr || so->s_op->o_abandon )
 933                         break;
 934                 ldap_pvt_thread_mutex_unlock( &so->s_mutex );
 935
 936                 if ( sr->s_mode == LDAP_SYNC_NEW_COOKIE ) {
 937                         SlapReply rs = { REP_INTERMEDIATE };
 938
 939                         rc = syncprov_sendinfo( op, &rs, LDAP_TAG_SYNC_NEW_COOKIE,
 940                                 &sr->s_csn, 0, NULL, 0 );
 941                 } else {
 942                         opc.sdn = sr->s_dn;
 943                         opc.sndn = sr->s_ndn;
 944                         opc.suuid = sr->s_uuid;
 945                         opc.sctxcsn = sr->s_csn;
 946                         opc.sreference = sr->s_isreference;
 947                         opc.se = sr->s_e;
 948
 949                         rc = syncprov_sendresp( op, &opc, so, sr->s_mode );
 950
 951                 }
 952                 if ( sr->s_e ) {
 953                         if ( !dec_mutexint( sr->s_e->e_private )) {
 954                                 sr->s_e->e_private = NULL;
 955                                 entry_free ( sr->s_e );
 956                         }
 957                 }
 958
 959                 ch_free( sr );
 960
 961                 /* Exit loop with mutex held */
 962                 ldap_pvt_thread_mutex_lock( &so->s_mutex );
 963
 964         } while (0);
 965
 966         /* We now only send one change at a time, to prevent one
 967          * psearch from hogging all the CPU. Resubmit this task if
 968          * there are more responses queued and no errors occurred.
 969          */
 970
 971         if ( rc == 0 && so->s_res ) {
 972                 syncprov_qstart( so );
 973         } else {
 974                 so->s_flags ^= PS_TASK_QUEUED;
 975         }
 976
 977         ldap_pvt_thread_mutex_unlock( &so->s_mutex );
 978         return rc;
 979 }
 980
 981 /* task for playing back queued responses */
 982 static void *
 983 syncprov_qtask( void *ctx, void *arg )
 984 {
 985         syncops *so = arg;
 986         OperationBuffer opbuf;
 987         Operation *op;
 988         BackendDB be;
 989         int rc;
 990
 991         op = &opbuf.ob_op;
 992         *op = *so->s_op;
 993         op->o_hdr = &opbuf.ob_hdr;
 994         op->o_controls = opbuf.ob_controls;
 995         memset( op->o_controls, 0, sizeof(opbuf.ob_controls) );
 996
 997         *op->o_hdr = *so->s_op->o_hdr;
 998
 999         op->o_tmpmemctx = slap_sl_mem_create(SLAP_SLAB_SIZE, SLAP_SLAB_STACK, ctx, 1);
1000         op->o_tmpmfuncs = &slap_sl_mfuncs;
1001         op->o_threadctx = ctx;
1002
1003         /* syncprov_qplay expects a fake db */
1004         be = *so->s_op->o_bd;
1005         be.be_flags |= SLAP_DBFLAG_OVERLAY;
1006         op->o_bd = &be;
1007         LDAP_SLIST_FIRST(&op->o_extra) = NULL;
1008         op->o_callback = NULL;
1009
1010         rc = syncprov_qplay( op, so );
1011
1012         /* decrement use count... */
1013         syncprov_free_syncop( so );
1014
1015         return NULL;
1016 }
1017
1018 /* Start the task to play back queued psearch responses */
1019 static void
1020 syncprov_qstart( syncops *so )
1021 {
1022         so->s_flags |= PS_TASK_QUEUED;
1023         so->s_inuse++;
1024         ldap_pvt_thread_pool_submit( &connection_pool,
1025                 syncprov_qtask, so );
1026 }
1027
1028 /* Queue a persistent search response */
1029 static int
1030 syncprov_qresp( opcookie *opc, syncops *so, int mode )
1031 {
1032         syncres *sr;
1033         int srsize;
1034         struct berval cookie = opc->sctxcsn;
1035
1036         if ( mode == LDAP_SYNC_NEW_COOKIE ) {
1037                 syncprov_info_t *si = opc->son->on_bi.bi_private;
1038
1039                 slap_compose_sync_cookie( NULL, &cookie, si->si_ctxcsn,
1040                         so->s_rid, slap_serverID ? slap_serverID : -1);
1041         }
1042
1043         srsize = sizeof(syncres) + opc->suuid.bv_len + 1 +
1044                 opc->sdn.bv_len + 1 + opc->sndn.bv_len + 1;
1045         if ( cookie.bv_len )
1046                 srsize += cookie.bv_len + 1;
1047         sr = ch_malloc( srsize );
1048         sr->s_next = NULL;
1049         sr->s_e = opc->se;
1050         /* bump refcount on this entry */
1051         if ( opc->se )
1052                 inc_mutexint( opc->se->e_private );
1053         sr->s_dn.bv_val = (char *)(sr + 1);
1054         sr->s_dn.bv_len = opc->sdn.bv_len;
1055         sr->s_mode = mode;
1056         sr->s_isreference = opc->sreference;
1057         sr->s_ndn.bv_val = lutil_strcopy( sr->s_dn.bv_val,
1058                  opc->sdn.bv_val ) + 1;
1059         sr->s_ndn.bv_len = opc->sndn.bv_len;
1060         sr->s_uuid.bv_val = lutil_strcopy( sr->s_ndn.bv_val,
1061                  opc->sndn.bv_val ) + 1;
1062         sr->s_uuid.bv_len = opc->suuid.bv_len;
1063         AC_MEMCPY( sr->s_uuid.bv_val, opc->suuid.bv_val, opc->suuid.bv_len );
1064         if ( cookie.bv_len ) {
1065                 sr->s_csn.bv_val = sr->s_uuid.bv_val + sr->s_uuid.bv_len + 1;
1066                 strcpy( sr->s_csn.bv_val, cookie.bv_val );
1067         } else {
1068                 sr->s_csn.bv_val = NULL;
1069         }
1070         sr->s_csn.bv_len = cookie.bv_len;
1071
1072         if ( mode == LDAP_SYNC_NEW_COOKIE && cookie.bv_val ) {
1073                 ch_free( cookie.bv_val );
1074         }
1075
1076         ldap_pvt_thread_mutex_lock( &so->s_mutex );
1077         if ( !so->s_res ) {
1078                 so->s_res = sr;
1079         } else {
1080                 so->s_restail->s_next = sr;
1081         }
1082         so->s_restail = sr;
1083
1084         /* If the base of the psearch was modified, check it next time round */
1085         if ( so->s_flags & PS_WROTE_BASE ) {
1086                 so->s_flags ^= PS_WROTE_BASE;
1087                 so->s_flags |= PS_FIND_BASE;
1088         }
1089         if (( so->s_flags & (PS_IS_DETACHED|PS_TASK_QUEUED)) == PS_IS_DETACHED ) {
1090                 syncprov_qstart( so );
1091         }
1092         ldap_pvt_thread_mutex_unlock( &so->s_mutex );
1093         return LDAP_SUCCESS;
1094 }
1095
1096 static int
1097 syncprov_drop_psearch( syncops *so, int lock )
1098 {
1099         if ( so->s_flags & PS_IS_DETACHED ) {
1100                 if ( lock )
1101                         ldap_pvt_thread_mutex_lock( &so->s_op->o_conn->c_mutex );
1102                 so->s_op->o_conn->c_n_ops_executing--;
1103                 so->s_op->o_conn->c_n_ops_completed++;
1104                 LDAP_STAILQ_REMOVE( &so->s_op->o_conn->c_ops, so->s_op, Operation,
1105                         o_next );
1106                 if ( lock )
1107                         ldap_pvt_thread_mutex_unlock( &so->s_op->o_conn->c_mutex );
1108         }
1109         syncprov_free_syncop( so );
1110
1111         return 0;
1112 }
1113
1114 static int
1115 syncprov_ab_cleanup( Operation *op, SlapReply *rs )
1116 {
1117         slap_callback *sc = op->o_callback;
1118         op->o_callback = sc->sc_next;
1119         syncprov_drop_psearch( op->o_callback->sc_private, 0 );
1120         op->o_tmpfree( sc, op->o_tmpmemctx );
1121         return 0;
1122 }
1123
1124 static int
1125 syncprov_op_abandon( Operation *op, SlapReply *rs )
1126 {
1127         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
1128         syncprov_info_t         *si = on->on_bi.bi_private;
1129         syncops *so, *soprev;
1130
1131         ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
1132         for ( so=si->si_ops, soprev = (syncops *)&si->si_ops; so;
1133                 soprev=so, so=so->s_next ) {
1134                 if ( so->s_op->o_connid == op->o_connid &&
1135                         so->s_op->o_msgid == op->orn_msgid ) {
1136                                 so->s_op->o_abandon = 1;
1137                                 soprev->s_next = so->s_next;
1138                                 break;
1139                 }
1140         }
1141         ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
1142         if ( so ) {
1143                 /* Is this really a Cancel exop? */
1144                 if ( op->o_tag != LDAP_REQ_ABANDON ) {
1145                         so->s_op->o_cancel = SLAP_CANCEL_ACK;
1146                         rs->sr_err = LDAP_CANCELLED;
1147                         send_ldap_result( so->s_op, rs );
1148                         if ( so->s_flags & PS_IS_DETACHED ) {
1149                                 slap_callback *cb;
1150                                 cb = op->o_tmpcalloc( 1, sizeof(slap_callback), op->o_tmpmemctx );
1151                                 cb->sc_cleanup = syncprov_ab_cleanup;
1152                                 cb->sc_next = op->o_callback;
1153                                 cb->sc_private = so;
1154                                 return SLAP_CB_CONTINUE;
1155                         }
1156                 }
1157                 syncprov_drop_psearch( so, 0 );
1158         }
1159         return SLAP_CB_CONTINUE;
1160 }
1161
1162 /* Find which persistent searches are affected by this operation */
1163 static void
1164 syncprov_matchops( Operation *op, opcookie *opc, int saveit )
1165 {
1166         slap_overinst *on = opc->son;
1167         syncprov_info_t         *si = on->on_bi.bi_private;
1168
1169         fbase_cookie fc;
1170         syncops *ss, *sprev, *snext;
1171         Entry *e = NULL;
1172         Attribute *a;
1173         int rc;
1174         struct berval newdn;
1175         int freefdn = 0;
1176         BackendDB *b0 = op->o_bd, db;
1177
1178         fc.fdn = &op->o_req_ndn;
1179         /* compute new DN */
1180         if ( op->o_tag == LDAP_REQ_MODRDN && !saveit ) {
1181                 struct berval pdn;
1182                 if ( op->orr_nnewSup ) pdn = *op->orr_nnewSup;
1183                 else dnParent( fc.fdn, &pdn );
1184                 build_new_dn( &newdn, &pdn, &op->orr_nnewrdn, op->o_tmpmemctx );
1185                 fc.fdn = &newdn;
1186                 freefdn = 1;
1187         }
1188         if ( op->o_tag != LDAP_REQ_ADD ) {
1189                 if ( !SLAP_ISOVERLAY( op->o_bd )) {
1190                         db = *op->o_bd;
1191                         op->o_bd = &db;
1192                 }
1193                 rc = overlay_entry_get_ov( op, fc.fdn, NULL, NULL, 0, &e, on );
1194                 /* If we're sending responses now, make a copy and unlock the DB */
1195                 if ( e && !saveit ) {
1196                         if ( !opc->se ) {
1197                                 opc->se = entry_dup( e );
1198                                 opc->se->e_private = get_mutexint();
1199                         }
1200                         overlay_entry_release_ov( op, e, 0, on );
1201                         e = opc->se;
1202                 }
1203                 if ( rc ) {
1204                         op->o_bd = b0;
1205                         return;
1206                 }
1207         } else {
1208                 e = op->ora_e;
1209                 if ( !saveit ) {
1210                         if ( !opc->se ) {
1211                                 opc->se = entry_dup( e );
1212                                 opc->se->e_private = get_mutexint();
1213                         }
1214                         e = opc->se;
1215                 }
1216         }
1217
1218         if ( saveit || op->o_tag == LDAP_REQ_ADD ) {
1219                 ber_dupbv_x( &opc->sdn, &e->e_name, op->o_tmpmemctx );
1220                 ber_dupbv_x( &opc->sndn, &e->e_nname, op->o_tmpmemctx );
1221                 opc->sreference = is_entry_referral( e );
1222                 a = attr_find( e->e_attrs, slap_schema.si_ad_entryUUID );
1223                 if ( a )
1224                         ber_dupbv_x( &opc->suuid, &a->a_nvals[0], op->o_tmpmemctx );
1225         } else if ( op->o_tag == LDAP_REQ_MODRDN && !saveit ) {
1226                 op->o_tmpfree( opc->sndn.bv_val, op->o_tmpmemctx );
1227                 op->o_tmpfree( opc->sdn.bv_val, op->o_tmpmemctx );
1228                 ber_dupbv_x( &opc->sdn, &e->e_name, op->o_tmpmemctx );
1229                 ber_dupbv_x( &opc->sndn, &e->e_nname, op->o_tmpmemctx );
1230         }
1231
1232         ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
1233         for (ss = si->si_ops, sprev = (syncops *)&si->si_ops; ss;
1234                 sprev = ss, ss=snext)
1235         {
1236                 Operation op2;
1237                 Opheader oh;
1238                 syncmatches *sm;
1239                 int found = 0;
1240
1241                 snext = ss->s_next;
1242                 if ( ss->s_op->o_abandon )
1243                         continue;
1244
1245                 /* Don't send ops back to the originator */
1246                 if ( opc->osid > 0 && opc->osid == ss->s_sid ) {
1247                         Debug( LDAP_DEBUG_SYNC, "syncprov_matchops: skipping original sid %03x\n",
1248                                 opc->osid, 0, 0 );
1249                         continue;
1250                 }
1251
1252                 /* Don't send ops back to the messenger */
1253                 if ( opc->rsid > 0 && opc->rsid == ss->s_sid ) {
1254                         Debug( LDAP_DEBUG_SYNC, "syncprov_matchops: skipping relayed sid %03x\n",
1255                                 opc->rsid, 0, 0 );
1256                         continue;
1257                 }
1258
1259                 /* validate base */
1260                 fc.fss = ss;
1261                 fc.fbase = 0;
1262                 fc.fscope = 0;
1263
1264                 /* If the base of the search is missing, signal a refresh */
1265                 rc = syncprov_findbase( op, &fc );
1266                 if ( rc != LDAP_SUCCESS ) {
1267                         SlapReply rs = {REP_RESULT};
1268                         send_ldap_error( ss->s_op, &rs, LDAP_SYNC_REFRESH_REQUIRED,
1269                                 "search base has changed" );
1270                         sprev->s_next = snext;
1271                         syncprov_drop_psearch( ss, 1 );
1272                         ss = sprev;
1273                         continue;
1274                 }
1275
1276                 /* If we're sending results now, look for this op in old matches */
1277                 if ( !saveit ) {
1278                         syncmatches *old;
1279
1280                         /* Did we modify the search base? */
1281                         if ( dn_match( &op->o_req_ndn, &ss->s_base )) {
1282                                 ldap_pvt_thread_mutex_lock( &ss->s_mutex );
1283                                 ss->s_flags |= PS_WROTE_BASE;
1284                                 ldap_pvt_thread_mutex_unlock( &ss->s_mutex );
1285                         }
1286
1287                         for ( sm=opc->smatches, old=(syncmatches *)&opc->smatches; sm;
1288                                 old=sm, sm=sm->sm_next ) {
1289                                 if ( sm->sm_op == ss ) {
1290                                         found = 1;
1291                                         old->sm_next = sm->sm_next;
1292                                         op->o_tmpfree( sm, op->o_tmpmemctx );
1293                                         break;
1294                                 }
1295                         }
1296                 }
1297
1298                 if ( fc.fscope ) {
1299                         ldap_pvt_thread_mutex_lock( &ss->s_mutex );
1300                         op2 = *ss->s_op;
1301                         oh = *op->o_hdr;
1302                         oh.oh_conn = ss->s_op->o_conn;
1303                         oh.oh_connid = ss->s_op->o_connid;
1304                         op2.o_bd = op->o_bd->bd_self;
1305                         op2.o_hdr = &oh;
1306                         op2.o_extra = op->o_extra;
1307                         op2.o_callback = NULL;
1308                         if (ss->s_flags & PS_FIX_FILTER) {
1309                                 /* Skip the AND/GE clause that we stuck on in front. We
1310                                    would lose deletes/mods that happen during the refresh
1311                                    phase otherwise (ITS#6555) */
1312                                 op2.ors_filter = ss->s_op->ors_filter->f_and->f_next;
1313                         }
1314                         ldap_pvt_thread_mutex_unlock( &ss->s_mutex );
1315                         rc = test_filter( &op2, e, op2.ors_filter );
1316                 }
1317
1318                 Debug( LDAP_DEBUG_TRACE, "syncprov_matchops: sid %03x fscope %d rc %d\n",
1319                         ss->s_sid, fc.fscope, rc );
1320
1321                 /* check if current o_req_dn is in scope and matches filter */
1322                 if ( fc.fscope && rc == LDAP_COMPARE_TRUE ) {
1323                         if ( saveit ) {
1324                                 sm = op->o_tmpalloc( sizeof(syncmatches), op->o_tmpmemctx );
1325                                 sm->sm_next = opc->smatches;
1326                                 sm->sm_op = ss;
1327                                 ldap_pvt_thread_mutex_lock( &ss->s_mutex );
1328                                 ++ss->s_inuse;
1329                                 ldap_pvt_thread_mutex_unlock( &ss->s_mutex );
1330                                 opc->smatches = sm;
1331                         } else {
1332                                 /* if found send UPDATE else send ADD */
1333                                 syncprov_qresp( opc, ss,
1334                                         found ? LDAP_SYNC_MODIFY : LDAP_SYNC_ADD );
1335                         }
1336                 } else if ( !saveit && found ) {
1337                         /* send DELETE */
1338                         syncprov_qresp( opc, ss, LDAP_SYNC_DELETE );
1339                 } else if ( !saveit ) {
1340                         syncprov_qresp( opc, ss, LDAP_SYNC_NEW_COOKIE );
1341                 }
1342                 if ( !saveit && found ) {
1343                         /* Decrement s_inuse, was incremented when called
1344                          * with saveit == TRUE
1345                          */
1346                         syncprov_free_syncop( ss );
1347                 }
1348         }
1349         ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
1350
1351         if ( op->o_tag != LDAP_REQ_ADD && e ) {
1352                 if ( !SLAP_ISOVERLAY( op->o_bd )) {
1353                         op->o_bd = &db;
1354                 }
1355                 if ( saveit )
1356                         overlay_entry_release_ov( op, e, 0, on );
1357                 op->o_bd = b0;
1358         }
1359         if ( opc->se && !saveit ) {
1360                 if ( !dec_mutexint( opc->se->e_private )) {
1361                         opc->se->e_private = NULL;
1362                         entry_free( opc->se );
1363                         opc->se = NULL;
1364                 }
1365         }
1366         if ( freefdn ) {
1367                 op->o_tmpfree( fc.fdn->bv_val, op->o_tmpmemctx );
1368         }
1369         op->o_bd = b0;
1370 }
1371
1372 static int
1373 syncprov_op_cleanup( Operation *op, SlapReply *rs )
1374 {
1375         slap_callback *cb = op->o_callback;
1376         opcookie *opc = cb->sc_private;
1377         slap_overinst *on = opc->son;
1378         syncprov_info_t         *si = on->on_bi.bi_private;
1379         syncmatches *sm, *snext;
1380         modtarget *mt, mtdummy;
1381
1382         ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
1383         if ( si->si_active )
1384                 si->si_active--;
1385         ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
1386
1387         for (sm = opc->smatches; sm; sm=snext) {
1388                 snext = sm->sm_next;
1389                 syncprov_free_syncop( sm->sm_op );
1390                 op->o_tmpfree( sm, op->o_tmpmemctx );
1391         }
1392
1393         /* Remove op from lock table */
1394         mt = opc->smt;
1395         if ( mt ) {
1396                 ldap_pvt_thread_mutex_lock( &mt->mt_mutex );
1397                 mt->mt_mods = mt->mt_mods->mi_next;
1398                 /* If there are more, promote the next one */
1399                 if ( mt->mt_mods ) {
1400                         mt->mt_op = mt->mt_mods->mi_op;
1401                         ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
1402                 } else {
1403                         ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
1404                         ldap_pvt_thread_mutex_lock( &si->si_mods_mutex );
1405                         avl_delete( &si->si_mods, mt, sp_avl_cmp );
1406                         ldap_pvt_thread_mutex_unlock( &si->si_mods_mutex );
1407                         ldap_pvt_thread_mutex_destroy( &mt->mt_mutex );
1408                         ch_free( mt );
1409                 }
1410         }
1411         if ( !BER_BVISNULL( &opc->suuid ))
1412                 op->o_tmpfree( opc->suuid.bv_val, op->o_tmpmemctx );
1413         if ( !BER_BVISNULL( &opc->sndn ))
1414                 op->o_tmpfree( opc->sndn.bv_val, op->o_tmpmemctx );
1415         if ( !BER_BVISNULL( &opc->sdn ))
1416                 op->o_tmpfree( opc->sdn.bv_val, op->o_tmpmemctx );
1417         op->o_callback = cb->sc_next;
1418         op->o_tmpfree(cb, op->o_tmpmemctx);
1419
1420         return 0;
1421 }
1422
1423 static void
1424 syncprov_checkpoint( Operation *op, SlapReply *rs, slap_overinst *on )
1425 {
1426         syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
1427         Modifications mod;
1428         Operation opm;
1429         SlapReply rsm = { 0 };
1430         slap_callback cb = {0};
1431         BackendDB be;
1432         BackendInfo *bi;
1433
1434 #ifdef CHECK_CSN
1435         Syntax *syn = slap_schema.si_ad_contextCSN->ad_type->sat_syntax;
1436
1437         int i;
1438         for ( i=0; i<si->si_numcsns; i++ ) {
1439                 assert( !syn->ssyn_validate( syn, si->si_ctxcsn+i ));
1440         }
1441 #endif
1442         mod.sml_numvals = si->si_numcsns;
1443         mod.sml_values = si->si_ctxcsn;
1444         mod.sml_nvalues = NULL;
1445         mod.sml_desc = slap_schema.si_ad_contextCSN;
1446         mod.sml_op = LDAP_MOD_REPLACE;
1447         mod.sml_flags = SLAP_MOD_INTERNAL;
1448         mod.sml_next = NULL;
1449
1450         cb.sc_response = slap_null_cb;
1451         opm = *op;
1452         opm.o_tag = LDAP_REQ_MODIFY;
1453         opm.o_callback = &cb;
1454         opm.orm_modlist = &mod;
1455         opm.orm_no_opattrs = 1;
1456         if ( SLAP_GLUE_SUBORDINATE( op->o_bd )) {
1457                 be = *on->on_info->oi_origdb;
1458                 opm.o_bd = &be;
1459         }
1460         opm.o_req_dn = si->si_contextdn;
1461         opm.o_req_ndn = si->si_contextdn;
1462         bi = opm.o_bd->bd_info;
1463         opm.o_bd->bd_info = on->on_info->oi_orig;
1464         opm.o_managedsait = SLAP_CONTROL_NONCRITICAL;
1465         opm.o_no_schema_check = 1;
1466         opm.o_bd->be_modify( &opm, &rsm );
1467
1468         if ( rsm.sr_err == LDAP_NO_SUCH_OBJECT &&
1469                 SLAP_SYNC_SUBENTRY( opm.o_bd )) {
1470                 const char      *text;
1471                 char txtbuf[SLAP_TEXT_BUFLEN];
1472                 size_t textlen = sizeof txtbuf;
1473                 Entry *e = slap_create_context_csn_entry( opm.o_bd, NULL );
1474                 slap_mods2entry( &mod, &e, 0, 1, &text, txtbuf, textlen);
1475                 opm.ora_e = e;
1476                 opm.o_bd->be_add( &opm, &rsm );
1477                 if ( e == opm.ora_e )
1478                         be_entry_release_w( &opm, opm.ora_e );
1479         }
1480         opm.o_bd->bd_info = bi;
1481
1482         if ( mod.sml_next != NULL ) {
1483                 slap_mods_free( mod.sml_next, 1 );
1484         }
1485 #ifdef CHECK_CSN
1486         for ( i=0; i<si->si_numcsns; i++ ) {
1487                 assert( !syn->ssyn_validate( syn, si->si_ctxcsn+i ));
1488         }
1489 #endif
1490 }
1491
1492 static void
1493 syncprov_add_slog( Operation *op )
1494 {
1495         opcookie *opc = op->o_callback->sc_private;
1496         slap_overinst *on = opc->son;
1497         syncprov_info_t         *si = on->on_bi.bi_private;
1498         sessionlog *sl;
1499         slog_entry *se;
1500
1501         sl = si->si_logs;
1502         {
1503                 if ( BER_BVISEMPTY( &op->o_csn ) ) {
1504                         /* During the syncrepl refresh phase we can receive operations
1505                          * without a csn.  We cannot reliably determine the consumers
1506                          * state with respect to such operations, so we ignore them and
1507                          * wipe out anything in the log if we see them.
1508                          */
1509                         ldap_pvt_thread_mutex_lock( &sl->sl_mutex );
1510                         while ( se = sl->sl_head ) {
1511                                 sl->sl_head = se->se_next;
1512                                 ch_free( se );
1513                         }
1514                         sl->sl_tail = NULL;
1515                         sl->sl_num = 0;
1516                         ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
1517                         return;
1518                 }
1519
1520                 /* Allocate a record. UUIDs are not NUL-terminated. */
1521                 se = ch_malloc( sizeof( slog_entry ) + opc->suuid.bv_len +
1522                         op->o_csn.bv_len + 1 );
1523                 se->se_next = NULL;
1524                 se->se_tag = op->o_tag;
1525
1526                 se->se_uuid.bv_val = (char *)(&se[1]);
1527                 AC_MEMCPY( se->se_uuid.bv_val, opc->suuid.bv_val, opc->suuid.bv_len );
1528                 se->se_uuid.bv_len = opc->suuid.bv_len;
1529
1530                 se->se_csn.bv_val = se->se_uuid.bv_val + opc->suuid.bv_len;
1531                 AC_MEMCPY( se->se_csn.bv_val, op->o_csn.bv_val, op->o_csn.bv_len );
1532                 se->se_csn.bv_val[op->o_csn.bv_len] = '\0';
1533                 se->se_csn.bv_len = op->o_csn.bv_len;
1534                 se->se_sid = slap_parse_csn_sid( &se->se_csn );
1535
1536                 ldap_pvt_thread_mutex_lock( &sl->sl_mutex );
1537                 if ( sl->sl_head ) {
1538                         /* Keep the list in csn order. */
1539                         if ( ber_bvcmp( &sl->sl_tail->se_csn, &se->se_csn ) <= 0 ) {
1540                                 sl->sl_tail->se_next = se;
1541                                 sl->sl_tail = se;
1542                         } else {
1543                                 slog_entry **sep;
1544
1545                                 for ( sep = &sl->sl_head; *sep; sep = &(*sep)->se_next ) {
1546                                         if ( ber_bvcmp( &se->se_csn, &(*sep)->se_csn ) < 0 ) {
1547                                                 se->se_next = *sep;
1548                                                 *sep = se;
1549                                                 break;
1550                                         }
1551                                 }
1552                         }
1553                 } else {
1554                         sl->sl_head = se;
1555                         sl->sl_tail = se;
1556                 }
1557                 sl->sl_num++;
1558                 while ( sl->sl_num > sl->sl_size ) {
1559                         se = sl->sl_head;
1560                         sl->sl_head = se->se_next;
1561                         ch_free( se );
1562                         sl->sl_num--;
1563                 }
1564                 ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
1565         }
1566 }
1567
1568 /* Just set a flag if we found the matching entry */
1569 static int
1570 playlog_cb( Operation *op, SlapReply *rs )
1571 {
1572         if ( rs->sr_type == REP_SEARCH ) {
1573                 op->o_callback->sc_private = (void *)1;
1574         }
1575         return rs->sr_err;
1576 }
1577
1578 /* enter with sl->sl_mutex locked, release before returning */
1579 static void
1580 syncprov_playlog( Operation *op, SlapReply *rs, sessionlog *sl,
1581         sync_control *srs, BerVarray ctxcsn, int numcsns, int *sids )
1582 {
1583         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
1584         slog_entry *se;
1585         int i, j, ndel, num, nmods, mmods;
1586         char cbuf[LDAP_PVT_CSNSTR_BUFSIZE];
1587         BerVarray uuids;
1588         struct berval delcsn[2];
1589
1590         if ( !sl->sl_num ) {
1591                 ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
1592                 return;
1593         }
1594
1595         num = sl->sl_num;
1596         i = 0;
1597         nmods = 0;
1598
1599         uuids = op->o_tmpalloc( (num+1) * sizeof( struct berval ) +
1600                 num * UUID_LEN, op->o_tmpmemctx );
1601         uuids[0].bv_val = (char *)(uuids + num + 1);
1602
1603         delcsn[0].bv_len = 0;
1604         delcsn[0].bv_val = cbuf;
1605         BER_BVZERO(&delcsn[1]);
1606
1607         /* Make a copy of the relevant UUIDs. Put the Deletes up front
1608          * and everything else at the end. Do this first so we can
1609          * unlock the list mutex.
1610          */
1611         Debug( LDAP_DEBUG_SYNC, "srs csn %s\n",
1612                 srs->sr_state.ctxcsn[0].bv_val, 0, 0 );
1613         for ( se=sl->sl_head; se; se=se->se_next ) {
1614                 int k;
1615                 Debug( LDAP_DEBUG_SYNC, "log csn %s\n", se->se_csn.bv_val, 0, 0 );
1616                 ndel = 1;
1617                 for ( k=0; k<srs->sr_state.numcsns; k++ ) {
1618                         if ( se->se_sid == srs->sr_state.sids[k] ) {
1619                                 ndel = ber_bvcmp( &se->se_csn, &srs->sr_state.ctxcsn[k] );
1620                                 break;
1621                         }
1622                 }
1623                 if ( ndel <= 0 ) {
1624                         Debug( LDAP_DEBUG_SYNC, "cmp %d, too old\n", ndel, 0, 0 );
1625                         continue;
1626                 }
1627                 ndel = 0;
1628                 for ( k=0; k<numcsns; k++ ) {
1629                         if ( se->se_sid == sids[k] ) {
1630                                 ndel = ber_bvcmp( &se->se_csn, &ctxcsn[k] );
1631                                 break;
1632                         }
1633                 }
1634                 if ( ndel > 0 ) {
1635                         Debug( LDAP_DEBUG_SYNC, "cmp %d, too new\n", ndel, 0, 0 );
1636                         break;
1637                 }
1638                 if ( se->se_tag == LDAP_REQ_DELETE ) {
1639                         j = i;
1640                         i++;
1641                         AC_MEMCPY( cbuf, se->se_csn.bv_val, se->se_csn.bv_len );
1642                         delcsn[0].bv_len = se->se_csn.bv_len;
1643                         delcsn[0].bv_val[delcsn[0].bv_len] = '\0';
1644                 } else {
1645                         nmods++;
1646                         j = num - nmods;
1647                 }
1648                 uuids[j].bv_val = uuids[0].bv_val + (j * UUID_LEN);
1649                 AC_MEMCPY(uuids[j].bv_val, se->se_uuid.bv_val, UUID_LEN);
1650                 uuids[j].bv_len = UUID_LEN;
1651         }
1652         ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
1653
1654         ndel = i;
1655
1656         /* Zero out unused slots */
1657         for ( i=ndel; i < num - nmods; i++ )
1658                 uuids[i].bv_len = 0;
1659
1660         /* Mods must be validated to see if they belong in this delete set.
1661          */
1662
1663         mmods = nmods;
1664         /* Strip any duplicates */
1665         for ( i=0; i<nmods; i++ ) {
1666                 for ( j=0; j<ndel; j++ ) {
1667                         if ( bvmatch( &uuids[j], &uuids[num - 1 - i] )) {
1668                                 uuids[num - 1 - i].bv_len = 0;
1669                                 mmods --;
1670                                 break;
1671                         }
1672                 }
1673                 if ( uuids[num - 1 - i].bv_len == 0 ) continue;
1674                 for ( j=0; j<i; j++ ) {
1675                         if ( bvmatch( &uuids[num - 1 - j], &uuids[num - 1 - i] )) {
1676                                 uuids[num - 1 - i].bv_len = 0;
1677                                 mmods --;
1678                                 break;
1679                         }
1680                 }
1681         }
1682
1683         if ( mmods ) {
1684                 Operation fop;
1685                 SlapReply frs = { REP_RESULT };
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 ) continue;
1716
1717                         mf.f_av_value = uuids[i];
1718                         cb.sc_private = NULL;
1719                         fop.ors_slimit = 1;
1720                         frs.sr_nentries = 0;
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                 fop.o_bd->bd_info = (BackendInfo *)on;
1729         }
1730         if ( ndel ) {
1731                 struct berval cookie;
1732
1733                 if ( delcsn[0].bv_len ) {
1734                         slap_compose_sync_cookie( op, &cookie, delcsn, srs->sr_state.rid,
1735                                 slap_serverID ? slap_serverID : -1 );
1736
1737                         Debug( LDAP_DEBUG_SYNC, "syncprov_playlog: cookie=%s\n", cookie.bv_val, 0, 0 );
1738                 }
1739
1740                 uuids[ndel].bv_val = NULL;
1741                 syncprov_sendinfo( op, rs, LDAP_TAG_SYNC_ID_SET,
1742                         delcsn[0].bv_len ? &cookie : NULL, 0, uuids, 1 );
1743                 if ( delcsn[0].bv_len ) {
1744                         op->o_tmpfree( cookie.bv_val, op->o_tmpmemctx );
1745                 }
1746         }
1747         op->o_tmpfree( uuids, op->o_tmpmemctx );
1748 }
1749
1750 static int
1751 syncprov_op_response( Operation *op, SlapReply *rs )
1752 {
1753         opcookie *opc = op->o_callback->sc_private;
1754         slap_overinst *on = opc->son;
1755         syncprov_info_t         *si = on->on_bi.bi_private;
1756         syncmatches *sm;
1757
1758         if ( rs->sr_err == LDAP_SUCCESS )
1759         {
1760                 struct berval maxcsn;
1761                 char cbuf[LDAP_PVT_CSNSTR_BUFSIZE];
1762                 int do_check = 0, have_psearches, foundit, csn_changed = 0;
1763
1764                 ldap_pvt_thread_mutex_lock( &si->si_resp_mutex );
1765
1766                 /* Update our context CSN */
1767                 cbuf[0] = '\0';
1768                 maxcsn.bv_val = cbuf;
1769                 maxcsn.bv_len = sizeof(cbuf);
1770                 ldap_pvt_thread_rdwr_wlock( &si->si_csn_rwlock );
1771
1772                 slap_get_commit_csn( op, &maxcsn, &foundit );
1773                 if ( BER_BVISEMPTY( &maxcsn ) && SLAP_GLUE_SUBORDINATE( op->o_bd )) {
1774                         /* syncrepl queues the CSN values in the db where
1775                          * it is configured , not where the changes are made.
1776                          * So look for a value in the glue db if we didn't
1777                          * find any in this db.
1778                          */
1779                         BackendDB *be = op->o_bd;
1780                         op->o_bd = select_backend( &be->be_nsuffix[0], 1);
1781                         maxcsn.bv_val = cbuf;
1782                         maxcsn.bv_len = sizeof(cbuf);
1783                         slap_get_commit_csn( op, &maxcsn, &foundit );
1784                         op->o_bd = be;
1785                 }
1786                 if ( !BER_BVISEMPTY( &maxcsn ) ) {
1787                         int i, sid;
1788 #ifdef CHECK_CSN
1789                         Syntax *syn = slap_schema.si_ad_contextCSN->ad_type->sat_syntax;
1790                         assert( !syn->ssyn_validate( syn, &maxcsn ));
1791 #endif
1792                         sid = slap_parse_csn_sid( &maxcsn );
1793                         for ( i=0; i<si->si_numcsns; i++ ) {
1794                                 if ( sid == si->si_sids[i] ) {
1795                                         if ( ber_bvcmp( &maxcsn, &si->si_ctxcsn[i] ) > 0 ) {
1796                                                 ber_bvreplace( &si->si_ctxcsn[i], &maxcsn );
1797                                                 csn_changed = 1;
1798                                         }
1799                                         break;
1800                                 }
1801                         }
1802                         /* It's a new SID for us */
1803                         if ( i == si->si_numcsns ) {
1804                                 value_add_one( &si->si_ctxcsn, &maxcsn );
1805                                 csn_changed = 1;
1806                                 si->si_numcsns++;
1807                                 si->si_sids = ch_realloc( si->si_sids, si->si_numcsns *
1808                                         sizeof(int));
1809                                 si->si_sids[i] = sid;
1810                         }
1811                 }
1812
1813                 /* Don't do any processing for consumer contextCSN updates */
1814                 if ( op->o_dont_replicate ) {
1815                         if ( op->o_tag == LDAP_REQ_MODIFY &&
1816                                 op->orm_modlist->sml_op == LDAP_MOD_REPLACE &&
1817                                 op->orm_modlist->sml_desc == slap_schema.si_ad_contextCSN ) {
1818                         /* Catch contextCSN updates from syncrepl. We have to look at
1819                          * all the attribute values, as there may be more than one csn
1820                          * that changed, and only one can be passed in the csn queue.
1821                          */
1822                         Modifications *mod = op->orm_modlist;
1823                         int i, j, sid;
1824
1825                         for ( i=0; i<mod->sml_numvals; i++ ) {
1826                                 sid = slap_parse_csn_sid( &mod->sml_values[i] );
1827                                 for ( j=0; j<si->si_numcsns; j++ ) {
1828                                         if ( sid == si->si_sids[j] ) {
1829                                                 if ( ber_bvcmp( &mod->sml_values[i], &si->si_ctxcsn[j] ) > 0 ) {
1830                                                         ber_bvreplace( &si->si_ctxcsn[j], &mod->sml_values[i] );
1831                                                         csn_changed = 1;
1832                                                 }
1833                                                 break;
1834                                         }
1835                                 }
1836
1837                                 if ( j == si->si_numcsns ) {
1838                                         value_add_one( &si->si_ctxcsn, &mod->sml_values[i] );
1839                                         si->si_numcsns++;
1840                                         si->si_sids = ch_realloc( si->si_sids, si->si_numcsns *
1841                                                 sizeof(int));
1842                                         si->si_sids[j] = sid;
1843                                         csn_changed = 1;
1844                                 }
1845                         }
1846                         if ( csn_changed )
1847                                 si->si_dirty = 0;
1848                         ldap_pvt_thread_rdwr_wunlock( &si->si_csn_rwlock );
1849
1850                         if ( csn_changed ) {
1851                                 syncops *ss;
1852                                 ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
1853                                 for ( ss = si->si_ops; ss; ss = ss->s_next ) {
1854                                         if ( ss->s_op->o_abandon )
1855                                                 continue;
1856                                         /* Send the updated csn to all syncrepl consumers,
1857                                          * including the server from which it originated.
1858                                          * The syncrepl consumer and syncprov provider on
1859                                          * the originating server may be configured to store
1860                                          * their csn values in different entries.
1861                                          */
1862                                         syncprov_qresp( opc, ss, LDAP_SYNC_NEW_COOKIE );
1863                                 }
1864                                 ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
1865                         }
1866                         } else {
1867                         ldap_pvt_thread_rdwr_wunlock( &si->si_csn_rwlock );
1868                         }
1869                         goto leave;
1870                 }
1871
1872                 si->si_numops++;
1873                 if ( si->si_chkops || si->si_chktime ) {
1874                         /* Never checkpoint adding the context entry,
1875                          * it will deadlock
1876                          */
1877                         if ( op->o_tag != LDAP_REQ_ADD ||
1878                                 !dn_match( &op->o_req_ndn, &si->si_contextdn )) {
1879                                 if ( si->si_chkops && si->si_numops >= si->si_chkops ) {
1880                                         do_check = 1;
1881                                         si->si_numops = 0;
1882                                 }
1883                                 if ( si->si_chktime &&
1884                                         (op->o_time - si->si_chklast >= si->si_chktime )) {
1885                                         if ( si->si_chklast ) {
1886                                                 do_check = 1;
1887                                                 si->si_chklast = op->o_time;
1888                                         } else {
1889                                                 si->si_chklast = 1;
1890                                         }
1891                                 }
1892                         }
1893                 }
1894                 si->si_dirty = !csn_changed;
1895                 ldap_pvt_thread_rdwr_wunlock( &si->si_csn_rwlock );
1896
1897                 if ( do_check ) {
1898                         ldap_pvt_thread_rdwr_rlock( &si->si_csn_rwlock );
1899                         syncprov_checkpoint( op, rs, on );
1900                         ldap_pvt_thread_rdwr_runlock( &si->si_csn_rwlock );
1901                 }
1902
1903                 /* only update consumer ctx if this is a newer csn */
1904                 if ( csn_changed ) {
1905                         opc->sctxcsn = maxcsn;
1906                 }
1907
1908                 /* Handle any persistent searches */
1909                 ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
1910                 have_psearches = ( si->si_ops != NULL );
1911                 ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
1912                 if ( have_psearches ) {
1913                         switch(op->o_tag) {
1914                         case LDAP_REQ_ADD:
1915                         case LDAP_REQ_MODIFY:
1916                         case LDAP_REQ_MODRDN:
1917                         case LDAP_REQ_EXTENDED:
1918                                 syncprov_matchops( op, opc, 0 );
1919                                 break;
1920                         case LDAP_REQ_DELETE:
1921                                 /* for each match in opc->smatches:
1922                                  *   send DELETE msg
1923                                  */
1924                                 for ( sm = opc->smatches; sm; sm=sm->sm_next ) {
1925                                         if ( sm->sm_op->s_op->o_abandon )
1926                                                 continue;
1927                                         syncprov_qresp( opc, sm->sm_op, LDAP_SYNC_DELETE );
1928                                 }
1929                                 break;
1930                         }
1931                 }
1932
1933                 /* Add any log records */
1934                 if ( si->si_logs && op->o_tag != LDAP_REQ_ADD ) {
1935                         syncprov_add_slog( op );
1936                 }
1937 leave:          ldap_pvt_thread_mutex_unlock( &si->si_resp_mutex );
1938         }
1939         return SLAP_CB_CONTINUE;
1940 }
1941
1942 /* We don't use a subentry to store the context CSN any more.
1943  * We expose the current context CSN as an operational attribute
1944  * of the suffix entry.
1945  */
1946 static int
1947 syncprov_op_compare( Operation *op, SlapReply *rs )
1948 {
1949         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
1950         syncprov_info_t         *si = on->on_bi.bi_private;
1951         int rc = SLAP_CB_CONTINUE;
1952
1953         if ( dn_match( &op->o_req_ndn, &si->si_contextdn ) &&
1954                 op->oq_compare.rs_ava->aa_desc == slap_schema.si_ad_contextCSN )
1955         {
1956                 Entry e = {0};
1957                 Attribute a = {0};
1958
1959                 e.e_name = si->si_contextdn;
1960                 e.e_nname = si->si_contextdn;
1961                 e.e_attrs = &a;
1962
1963                 a.a_desc = slap_schema.si_ad_contextCSN;
1964
1965                 ldap_pvt_thread_rdwr_rlock( &si->si_csn_rwlock );
1966
1967                 a.a_vals = si->si_ctxcsn;
1968                 a.a_nvals = a.a_vals;
1969                 a.a_numvals = si->si_numcsns;
1970
1971                 rs->sr_err = access_allowed( op, &e, op->oq_compare.rs_ava->aa_desc,
1972                         &op->oq_compare.rs_ava->aa_value, ACL_COMPARE, NULL );
1973                 if ( ! rs->sr_err ) {
1974                         rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
1975                         goto return_results;
1976                 }
1977
1978                 if ( get_assert( op ) &&
1979                         ( test_filter( op, &e, get_assertion( op ) ) != LDAP_COMPARE_TRUE ) )
1980                 {
1981                         rs->sr_err = LDAP_ASSERTION_FAILED;
1982                         goto return_results;
1983                 }
1984
1985
1986                 rs->sr_err = LDAP_COMPARE_FALSE;
1987
1988                 if ( attr_valfind( &a,
1989                         SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
1990                                 SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
1991                                 &op->oq_compare.rs_ava->aa_value, NULL, op->o_tmpmemctx ) == 0 )
1992                 {
1993                         rs->sr_err = LDAP_COMPARE_TRUE;
1994                 }
1995
1996 return_results:;
1997
1998                 ldap_pvt_thread_rdwr_runlock( &si->si_csn_rwlock );
1999
2000                 send_ldap_result( op, rs );
2001
2002                 if( rs->sr_err == LDAP_COMPARE_FALSE || rs->sr_err == LDAP_COMPARE_TRUE ) {
2003                         rs->sr_err = LDAP_SUCCESS;
2004                 }
2005                 rc = rs->sr_err;
2006         }
2007
2008         return rc;
2009 }
2010
2011 static int
2012 syncprov_op_mod( Operation *op, SlapReply *rs )
2013 {
2014         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
2015         syncprov_info_t         *si = on->on_bi.bi_private;
2016         slap_callback *cb;
2017         opcookie *opc;
2018         int have_psearches, cbsize;
2019
2020         ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
2021         have_psearches = ( si->si_ops != NULL );
2022         si->si_active++;
2023         ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
2024
2025         cbsize = sizeof(slap_callback) + sizeof(opcookie) +
2026                 (have_psearches ? sizeof(modinst) : 0 );
2027
2028         cb = op->o_tmpcalloc(1, cbsize, op->o_tmpmemctx);
2029         opc = (opcookie *)(cb+1);
2030         opc->son = on;
2031         cb->sc_response = syncprov_op_response;
2032         cb->sc_cleanup = syncprov_op_cleanup;
2033         cb->sc_private = opc;
2034         cb->sc_next = op->o_callback;
2035         op->o_callback = cb;
2036
2037         opc->osid = -1;
2038         opc->rsid = -1;
2039         if ( op->o_csn.bv_val ) {
2040                 opc->osid = slap_parse_csn_sid( &op->o_csn );
2041         }
2042         if ( op->o_controls ) {
2043                 struct sync_cookie *scook =
2044                 op->o_controls[slap_cids.sc_LDAPsync];
2045                 if ( scook )
2046                         opc->rsid = scook->sid;
2047         }
2048
2049         /* If there are active persistent searches, lock this operation.
2050          * See seqmod.c for the locking logic on its own.
2051          */
2052         if ( have_psearches ) {
2053                 modtarget *mt, mtdummy;
2054                 modinst *mi;
2055
2056                 mi = (modinst *)(opc+1);
2057                 mi->mi_op = op;
2058
2059                 /* See if we're already modifying this entry... */
2060                 mtdummy.mt_op = op;
2061                 ldap_pvt_thread_mutex_lock( &si->si_mods_mutex );
2062                 mt = avl_find( si->si_mods, &mtdummy, sp_avl_cmp );
2063                 if ( mt ) {
2064                         ldap_pvt_thread_mutex_lock( &mt->mt_mutex );
2065                         if ( mt->mt_mods == NULL ) {
2066                                 /* Cannot reuse this mt, as another thread is about
2067                                  * to release it in syncprov_op_cleanup.
2068                                  */
2069                                 ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
2070                                 mt = NULL;
2071                         }
2072                 }
2073                 if ( mt ) {
2074                         ldap_pvt_thread_mutex_unlock( &si->si_mods_mutex );
2075                         mt->mt_tail->mi_next = mi;
2076                         mt->mt_tail = mi;
2077                         /* wait for this op to get to head of list */
2078                         while ( mt->mt_mods != mi ) {
2079                                 ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
2080                                 /* FIXME: if dynamic config can delete overlays or
2081                                  * databases we'll have to check for cleanup here.
2082                                  * Currently it's not an issue because there are
2083                                  * no dynamic config deletes...
2084                                  */
2085                                 if ( slapd_shutdown )
2086                                         return SLAPD_ABANDON;
2087
2088                                 if ( !ldap_pvt_thread_pool_pausecheck( &connection_pool ))
2089                                         ldap_pvt_thread_yield();
2090                                 ldap_pvt_thread_mutex_lock( &mt->mt_mutex );
2091
2092                                 /* clean up if the caller is giving up */
2093                                 if ( op->o_abandon ) {
2094                                         modinst *m2;
2095                                         for ( m2 = mt->mt_mods; m2->mi_next != mi;
2096                                                 m2 = m2->mi_next );
2097                                         m2->mi_next = mi->mi_next;
2098                                         if ( mt->mt_tail == mi ) mt->mt_tail = m2;
2099                                         op->o_tmpfree( cb, op->o_tmpmemctx );
2100                                         ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
2101                                         return SLAPD_ABANDON;
2102                                 }
2103                         }
2104                         ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
2105                 } else {
2106                         /* Record that we're modifying this entry now */
2107                         mt = ch_malloc( sizeof(modtarget) );
2108                         mt->mt_mods = mi;
2109                         mt->mt_tail = mi;
2110                         mt->mt_op = mi->mi_op;
2111                         ldap_pvt_thread_mutex_init( &mt->mt_mutex );
2112                         avl_insert( &si->si_mods, mt, sp_avl_cmp, avl_dup_error );
2113                         ldap_pvt_thread_mutex_unlock( &si->si_mods_mutex );
2114                 }
2115                 opc->smt = mt;
2116         }
2117
2118         if (( have_psearches || si->si_logs ) && op->o_tag != LDAP_REQ_ADD )
2119                 syncprov_matchops( op, opc, 1 );
2120
2121         return SLAP_CB_CONTINUE;
2122 }
2123
2124 static int
2125 syncprov_op_extended( Operation *op, SlapReply *rs )
2126 {
2127         if ( exop_is_write( op ))
2128                 return syncprov_op_mod( op, rs );
2129
2130         return SLAP_CB_CONTINUE;
2131 }
2132
2133 typedef struct searchstate {
2134         slap_overinst *ss_on;
2135         syncops *ss_so;
2136         BerVarray ss_ctxcsn;
2137         int *ss_sids;
2138         int ss_numcsns;
2139 #define SS_PRESENT      0x01
2140 #define SS_CHANGED      0x02
2141         int ss_flags;
2142 } searchstate;
2143
2144 static int
2145 syncprov_search_cleanup( Operation *op, SlapReply *rs )
2146 {
2147         if ( rs->sr_ctrls ) {
2148                 op->o_tmpfree( rs->sr_ctrls[0], op->o_tmpmemctx );
2149                 op->o_tmpfree( rs->sr_ctrls, op->o_tmpmemctx );
2150                 rs->sr_ctrls = NULL;
2151         }
2152         return 0;
2153 }
2154
2155 typedef struct SyncOperationBuffer {
2156         Operation               sob_op;
2157         Opheader                sob_hdr;
2158         OpExtra                 sob_oe;
2159         AttributeName   sob_extra;      /* not always present */
2160         /* Further data allocated here */
2161 } SyncOperationBuffer;
2162
2163 static void
2164 syncprov_detach_op( Operation *op, syncops *so, slap_overinst *on )
2165 {
2166         SyncOperationBuffer *sopbuf2;
2167         Operation *op2;
2168         int i, alen = 0;
2169         size_t size;
2170         char *ptr;
2171         GroupAssertion *g1, *g2;
2172
2173         /* count the search attrs */
2174         for (i=0; op->ors_attrs && !BER_BVISNULL( &op->ors_attrs[i].an_name ); i++) {
2175                 alen += op->ors_attrs[i].an_name.bv_len + 1;
2176         }
2177         /* Make a new copy of the operation */
2178         size = offsetof( SyncOperationBuffer, sob_extra ) +
2179                 (i ? ( (i+1) * sizeof(AttributeName) + alen) : 0) +
2180                 op->o_req_dn.bv_len + 1 +
2181                 op->o_req_ndn.bv_len + 1 +
2182                 op->o_ndn.bv_len + 1 +
2183                 so->s_filterstr.bv_len + 1;
2184         sopbuf2 = ch_calloc( 1, size );
2185         op2 = &sopbuf2->sob_op;
2186         op2->o_hdr = &sopbuf2->sob_hdr;
2187         LDAP_SLIST_FIRST(&op2->o_extra) = &sopbuf2->sob_oe;
2188
2189         /* Copy the fields we care about explicitly, leave the rest alone */
2190         *op2->o_hdr = *op->o_hdr;
2191         op2->o_tag = op->o_tag;
2192         op2->o_time = op->o_time;
2193         op2->o_bd = on->on_info->oi_origdb;
2194         op2->o_request = op->o_request;
2195         op2->o_managedsait = op->o_managedsait;
2196         LDAP_SLIST_FIRST(&op2->o_extra)->oe_key = on;
2197         LDAP_SLIST_NEXT(LDAP_SLIST_FIRST(&op2->o_extra), oe_next) = NULL;
2198
2199         ptr = (char *) sopbuf2 + offsetof( SyncOperationBuffer, sob_extra );
2200         if ( i ) {
2201                 op2->ors_attrs = (AttributeName *) ptr;
2202                 ptr = (char *) &op2->ors_attrs[i+1];
2203                 for (i=0; !BER_BVISNULL( &op->ors_attrs[i].an_name ); i++) {
2204                         op2->ors_attrs[i] = op->ors_attrs[i];
2205                         op2->ors_attrs[i].an_name.bv_val = ptr;
2206                         ptr = lutil_strcopy( ptr, op->ors_attrs[i].an_name.bv_val ) + 1;
2207                 }
2208                 BER_BVZERO( &op2->ors_attrs[i].an_name );
2209         }
2210
2211         op2->o_authz = op->o_authz;
2212         op2->o_ndn.bv_val = ptr;
2213         ptr = lutil_strcopy(ptr, op->o_ndn.bv_val) + 1;
2214         op2->o_dn = op2->o_ndn;
2215         op2->o_req_dn.bv_len = op->o_req_dn.bv_len;
2216         op2->o_req_dn.bv_val = ptr;
2217         ptr = lutil_strcopy(ptr, op->o_req_dn.bv_val) + 1;
2218         op2->o_req_ndn.bv_len = op->o_req_ndn.bv_len;
2219         op2->o_req_ndn.bv_val = ptr;
2220         ptr = lutil_strcopy(ptr, op->o_req_ndn.bv_val) + 1;
2221         op2->ors_filterstr.bv_val = ptr;
2222         strcpy( ptr, so->s_filterstr.bv_val );
2223         op2->ors_filterstr.bv_len = so->s_filterstr.bv_len;
2224
2225         /* Skip the AND/GE clause that we stuck on in front */
2226         if ( so->s_flags & PS_FIX_FILTER ) {
2227                 op2->ors_filter = op->ors_filter->f_and->f_next;
2228                 so->s_flags ^= PS_FIX_FILTER;
2229         } else {
2230                 op2->ors_filter = op->ors_filter;
2231         }
2232         op2->ors_filter = filter_dup( op2->ors_filter, NULL );
2233         so->s_op = op2;
2234
2235         /* Copy any cached group ACLs individually */
2236         op2->o_groups = NULL;
2237         for ( g1=op->o_groups; g1; g1=g1->ga_next ) {
2238                 g2 = ch_malloc( sizeof(GroupAssertion) + g1->ga_len );
2239                 *g2 = *g1;
2240                 strcpy( g2->ga_ndn, g1->ga_ndn );
2241                 g2->ga_next = op2->o_groups;
2242                 op2->o_groups = g2;
2243         }
2244         /* Don't allow any further group caching */
2245         op2->o_do_not_cache = 1;
2246
2247         /* Add op2 to conn so abandon will find us */
2248         op->o_conn->c_n_ops_executing++;
2249         op->o_conn->c_n_ops_completed--;
2250         LDAP_STAILQ_INSERT_TAIL( &op->o_conn->c_ops, op2, o_next );
2251         so->s_flags |= PS_IS_DETACHED;
2252
2253         /* Prevent anyone else from trying to send a result for this op */
2254         op->o_abandon = 1;
2255 }
2256
2257 static int
2258 syncprov_search_response( Operation *op, SlapReply *rs )
2259 {
2260         searchstate *ss = op->o_callback->sc_private;
2261         slap_overinst *on = ss->ss_on;
2262         syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
2263         sync_control *srs = op->o_controls[slap_cids.sc_LDAPsync];
2264
2265         if ( rs->sr_type == REP_SEARCH || rs->sr_type == REP_SEARCHREF ) {
2266                 Attribute *a;
2267                 /* If we got a referral without a referral object, there's
2268                  * something missing that we cannot replicate. Just ignore it.
2269                  * The consumer will abort because we didn't send the expected
2270                  * control.
2271                  */
2272                 if ( !rs->sr_entry ) {
2273                         assert( rs->sr_entry != NULL );
2274                         Debug( LDAP_DEBUG_ANY, "bogus referral in context\n",0,0,0 );
2275                         return SLAP_CB_CONTINUE;
2276                 }
2277                 a = attr_find( rs->sr_entry->e_attrs, slap_schema.si_ad_entryCSN );
2278                 if ( a == NULL && rs->sr_operational_attrs != NULL ) {
2279                         a = attr_find( rs->sr_operational_attrs, slap_schema.si_ad_entryCSN );
2280                 }
2281                 if ( a ) {
2282                         int i, sid;
2283                         sid = slap_parse_csn_sid( &a->a_nvals[0] );
2284
2285                         /* Don't send changed entries back to the originator */
2286                         if ( sid == srs->sr_state.sid && srs->sr_state.numcsns ) {
2287                                 Debug( LDAP_DEBUG_SYNC,
2288                                         "Entry %s changed by peer, ignored\n",
2289                                         rs->sr_entry->e_name.bv_val, 0, 0 );
2290                                 return LDAP_SUCCESS;
2291                         }
2292
2293                         /* If not a persistent search */
2294                         if ( !ss->ss_so ) {
2295                                 /* Make sure entry is less than the snapshot'd contextCSN */
2296                                 for ( i=0; i<ss->ss_numcsns; i++ ) {
2297                                         if ( sid == ss->ss_sids[i] && ber_bvcmp( &a->a_nvals[0],
2298                                                 &ss->ss_ctxcsn[i] ) > 0 ) {
2299                                                 Debug( LDAP_DEBUG_SYNC,
2300                                                         "Entry %s CSN %s greater than snapshot %s\n",
2301                                                         rs->sr_entry->e_name.bv_val,
2302                                                         a->a_nvals[0].bv_val,
2303                                                         ss->ss_ctxcsn[i].bv_val );
2304                                                 return LDAP_SUCCESS;
2305                                         }
2306                                 }
2307                         }
2308
2309                         /* Don't send old entries twice */
2310                         if ( srs->sr_state.ctxcsn ) {
2311                                 for ( i=0; i<srs->sr_state.numcsns; i++ ) {
2312                                         if ( sid == srs->sr_state.sids[i] &&
2313                                                 ber_bvcmp( &a->a_nvals[0],
2314                                                         &srs->sr_state.ctxcsn[i] )<= 0 ) {
2315                                                 Debug( LDAP_DEBUG_SYNC,
2316                                                         "Entry %s CSN %s older or equal to ctx %s\n",
2317                                                         rs->sr_entry->e_name.bv_val,
2318                                                         a->a_nvals[0].bv_val,
2319                                                         srs->sr_state.ctxcsn[i].bv_val );
2320                                                 return LDAP_SUCCESS;
2321                                         }
2322                                 }
2323                         }
2324                 }
2325                 rs->sr_ctrls = op->o_tmpalloc( sizeof(LDAPControl *)*2,
2326                         op->o_tmpmemctx );
2327                 rs->sr_ctrls[1] = NULL;
2328                 /* If we're in delta-sync mode, always send a cookie */
2329                 if ( si->si_nopres && si->si_usehint && a ) {
2330                         struct berval cookie;
2331                         slap_compose_sync_cookie( op, &cookie, a->a_nvals, srs->sr_state.rid, slap_serverID ? slap_serverID : -1 );
2332                         rs->sr_err = syncprov_state_ctrl( op, rs, rs->sr_entry,
2333                                 LDAP_SYNC_ADD, rs->sr_ctrls, 0, 1, &cookie );
2334                 } else {
2335                         rs->sr_err = syncprov_state_ctrl( op, rs, rs->sr_entry,
2336                                 LDAP_SYNC_ADD, rs->sr_ctrls, 0, 0, NULL );
2337                 }
2338         } else if ( rs->sr_type == REP_RESULT && rs->sr_err == LDAP_SUCCESS ) {
2339                 struct berval cookie = BER_BVNULL;
2340
2341                 if ( ( ss->ss_flags & SS_CHANGED ) &&
2342                         ss->ss_ctxcsn && !BER_BVISNULL( &ss->ss_ctxcsn[0] )) {
2343                         slap_compose_sync_cookie( op, &cookie, ss->ss_ctxcsn,
2344                                 srs->sr_state.rid, slap_serverID ? slap_serverID : -1 );
2345
2346                         Debug( LDAP_DEBUG_SYNC, "syncprov_search_response: cookie=%s\n", cookie.bv_val, 0, 0 );
2347                 }
2348
2349                 /* Is this a regular refresh?
2350                  * Note: refresh never gets here if there were no changes
2351                  */
2352                 if ( !ss->ss_so ) {
2353                         rs->sr_ctrls = op->o_tmpalloc( sizeof(LDAPControl *)*2,
2354                                 op->o_tmpmemctx );
2355                         rs->sr_ctrls[1] = NULL;
2356                         rs->sr_err = syncprov_done_ctrl( op, rs, rs->sr_ctrls,
2357                                 0, 1, &cookie, ( ss->ss_flags & SS_PRESENT ) ?  LDAP_SYNC_REFRESH_PRESENTS :
2358                                         LDAP_SYNC_REFRESH_DELETES );
2359                         op->o_tmpfree( cookie.bv_val, op->o_tmpmemctx );
2360                 } else {
2361                 /* It's RefreshAndPersist, transition to Persist phase */
2362                         syncprov_sendinfo( op, rs, ( ss->ss_flags & SS_PRESENT ) ?
2363                                 LDAP_TAG_SYNC_REFRESH_PRESENT : LDAP_TAG_SYNC_REFRESH_DELETE,
2364                                 ( ss->ss_flags & SS_CHANGED ) ? &cookie : NULL,
2365                                 1, NULL, 0 );
2366                         if ( !BER_BVISNULL( &cookie ))
2367                                 op->o_tmpfree( cookie.bv_val, op->o_tmpmemctx );
2368
2369                         /* Detach this Op from frontend control */
2370                         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
2371
2372                         /* But not if this connection was closed along the way */
2373                         if ( op->o_abandon ) {
2374                                 ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
2375                                 /* syncprov_ab_cleanup will free this syncop */
2376                                 return SLAPD_ABANDON;
2377
2378                         } else {
2379                                 ldap_pvt_thread_mutex_lock( &ss->ss_so->s_mutex );
2380                                 /* Turn off the refreshing flag */
2381                                 ss->ss_so->s_flags ^= PS_IS_REFRESHING;
2382
2383                                 syncprov_detach_op( op, ss->ss_so, on );
2384
2385                                 ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
2386
2387                                 /* If there are queued responses, fire them off */
2388                                 if ( ss->ss_so->s_res )
2389                                         syncprov_qstart( ss->ss_so );
2390                                 ldap_pvt_thread_mutex_unlock( &ss->ss_so->s_mutex );
2391                         }
2392
2393                         return LDAP_SUCCESS;
2394                 }
2395         }
2396
2397         return SLAP_CB_CONTINUE;
2398 }
2399
2400 static int
2401 syncprov_op_search( Operation *op, SlapReply *rs )
2402 {
2403         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
2404         syncprov_info_t         *si = (syncprov_info_t *)on->on_bi.bi_private;
2405         slap_callback   *cb;
2406         int gotstate = 0, changed = 0, do_present = 0;
2407         syncops *sop = NULL;
2408         searchstate *ss;
2409         sync_control *srs;
2410         BerVarray ctxcsn;
2411         int i, *sids, numcsns;
2412         struct berval mincsn;
2413         int dirty = 0;
2414
2415         if ( !(op->o_sync_mode & SLAP_SYNC_REFRESH) ) return SLAP_CB_CONTINUE;
2416
2417         if ( op->ors_deref & LDAP_DEREF_SEARCHING ) {
2418                 send_ldap_error( op, rs, LDAP_PROTOCOL_ERROR, "illegal value for derefAliases" );
2419                 return rs->sr_err;
2420         }
2421
2422         srs = op->o_controls[slap_cids.sc_LDAPsync];
2423
2424         /* If this is a persistent search, set it up right away */
2425         if ( op->o_sync_mode & SLAP_SYNC_PERSIST ) {
2426                 syncops so = {0};
2427                 fbase_cookie fc;
2428                 opcookie opc;
2429                 slap_callback sc;
2430
2431                 fc.fss = &so;
2432                 fc.fbase = 0;
2433                 so.s_eid = NOID;
2434                 so.s_op = op;
2435                 so.s_flags = PS_IS_REFRESHING | PS_FIND_BASE;
2436                 /* syncprov_findbase expects to be called as a callback... */
2437                 sc.sc_private = &opc;
2438                 opc.son = on;
2439                 ldap_pvt_thread_mutex_init( &so.s_mutex );
2440                 cb = op->o_callback;
2441                 op->o_callback = &sc;
2442                 rs->sr_err = syncprov_findbase( op, &fc );
2443                 op->o_callback = cb;
2444                 ldap_pvt_thread_mutex_destroy( &so.s_mutex );
2445
2446                 if ( rs->sr_err != LDAP_SUCCESS ) {
2447                         send_ldap_result( op, rs );
2448                         return rs->sr_err;
2449                 }
2450                 sop = ch_malloc( sizeof( syncops ));
2451                 *sop = so;
2452                 ldap_pvt_thread_mutex_init( &sop->s_mutex );
2453                 sop->s_rid = srs->sr_state.rid;
2454                 sop->s_sid = srs->sr_state.sid;
2455                 sop->s_inuse = 1;
2456
2457                 ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
2458                 while ( si->si_active ) {
2459                         /* Wait for active mods to finish before proceeding, as they
2460                          * may already have inspected the si_ops list looking for
2461                          * consumers to replicate the change to.  Using the log
2462                          * doesn't help, as we may finish playing it before the
2463                          * active mods gets added to it.
2464                          */
2465                         ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
2466                         if ( slapd_shutdown )
2467                                 return SLAPD_ABANDON;
2468                         if ( !ldap_pvt_thread_pool_pausecheck( &connection_pool ))
2469                                 ldap_pvt_thread_yield();
2470                         ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
2471                 }
2472                 sop->s_next = si->si_ops;
2473                 si->si_ops = sop;
2474                 ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
2475         }
2476
2477         /* snapshot the ctxcsn */
2478         ldap_pvt_thread_rdwr_rlock( &si->si_csn_rwlock );
2479         numcsns = si->si_numcsns;
2480         if ( numcsns ) {
2481                 ber_bvarray_dup_x( &ctxcsn, si->si_ctxcsn, op->o_tmpmemctx );
2482                 sids = op->o_tmpalloc( numcsns * sizeof(int), op->o_tmpmemctx );
2483                 for ( i=0; i<numcsns; i++ )
2484                         sids[i] = si->si_sids[i];
2485         } else {
2486                 ctxcsn = NULL;
2487                 sids = NULL;
2488         }
2489         dirty = si->si_dirty;
2490         ldap_pvt_thread_rdwr_runlock( &si->si_csn_rwlock );
2491
2492         /* If we have a cookie, handle the PRESENT lookups */
2493         if ( srs->sr_state.ctxcsn ) {
2494                 sessionlog *sl;
2495                 int i, j;
2496
2497                 /* If we don't have any CSN of our own yet, pretend nothing
2498                  * has changed.
2499                  */
2500                 if ( !numcsns )
2501                         goto no_change;
2502
2503                 if ( !si->si_nopres )
2504                         do_present = SS_PRESENT;
2505
2506                 /* If there are SIDs we don't recognize in the cookie, drop them */
2507                 for (i=0; i<srs->sr_state.numcsns; ) {
2508                         for (j=0; j<numcsns; j++) {
2509                                 if ( srs->sr_state.sids[i] == sids[j] ) {
2510                                         break;
2511                                 }
2512                         }
2513                         /* not found */
2514                         if ( j == numcsns ) {
2515                                 struct berval tmp = srs->sr_state.ctxcsn[i];
2516                                 j = srs->sr_state.numcsns - 1;
2517                                 srs->sr_state.ctxcsn[i] = srs->sr_state.ctxcsn[j];
2518                                 tmp.bv_len = 0;
2519                                 srs->sr_state.ctxcsn[j] = tmp;
2520                                 srs->sr_state.numcsns = j;
2521                                 srs->sr_state.sids[i] = srs->sr_state.sids[j];
2522                                 continue;
2523                         }
2524                         i++;
2525                 }
2526
2527                 /* Find the smallest CSN */
2528                 mincsn = srs->sr_state.ctxcsn[0];
2529                 for ( i=1; i<srs->sr_state.numcsns; i++ ) {
2530                         if ( ber_bvcmp( &mincsn, &srs->sr_state.ctxcsn[i] ) > 0 )
2531                                 mincsn = srs->sr_state.ctxcsn[i];
2532                 }
2533
2534                 /* If nothing has changed, shortcut it */
2535                 if ( srs->sr_state.numcsns == numcsns ) {
2536                         int i, j, newer;
2537                         for ( i=0; i<srs->sr_state.numcsns; i++ ) {
2538                                 for ( j=0; j<numcsns; j++ ) {
2539                                         if ( srs->sr_state.sids[i] != sids[j] )
2540                                                 continue;
2541                                         newer = ber_bvcmp( &srs->sr_state.ctxcsn[i], &ctxcsn[j] );
2542                                         /* If our state is newer, tell consumer about changes */
2543                                         if ( newer < 0 )
2544                                                 changed = SS_CHANGED;
2545                                         else if ( newer > 0 ) {
2546                                         /* our state is older, complain to consumer */
2547                                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
2548                                                 rs->sr_text = "consumer state is newer than provider!";
2549 bailout:
2550                                                 if ( sop ) {
2551                                                         syncops **sp = &si->si_ops;
2552
2553                                                         ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
2554                                                         while ( *sp != sop )
2555                                                                 sp = &(*sp)->s_next;
2556                                                         *sp = sop->s_next;
2557                                                         ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
2558                                                         ch_free( sop );
2559                                                 }
2560                                                 rs->sr_ctrls = NULL;
2561                                                 send_ldap_result( op, rs );
2562                                                 return rs->sr_err;
2563                                         }
2564                                         break;
2565                                 }
2566                                 if ( changed )
2567                                         break;
2568                         }
2569                         if ( !changed && !dirty ) {
2570                                 do_present = 0;
2571 no_change:              if ( !(op->o_sync_mode & SLAP_SYNC_PERSIST) ) {
2572                                         LDAPControl     *ctrls[2];
2573
2574                                         ctrls[0] = NULL;
2575                                         ctrls[1] = NULL;
2576                                         syncprov_done_ctrl( op, rs, ctrls, 0, 0,
2577                                                 NULL, LDAP_SYNC_REFRESH_DELETES );
2578                                         rs->sr_ctrls = ctrls;
2579                                         rs->sr_err = LDAP_SUCCESS;
2580                                         send_ldap_result( op, rs );
2581                                         rs->sr_ctrls = NULL;
2582                                         return rs->sr_err;
2583                                 }
2584                                 goto shortcut;
2585                         }
2586                 } else {
2587                         /* consumer doesn't have the right number of CSNs */
2588                         changed = SS_CHANGED;
2589                 }
2590                 /* Do we have a sessionlog for this search? */
2591                 sl=si->si_logs;
2592                 if ( sl ) {
2593                         ldap_pvt_thread_mutex_lock( &sl->sl_mutex );
2594                         /* Are there any log entries, and is the consumer state
2595                          * present in the session log?
2596                          */
2597                         if ( sl->sl_num > 0 && ber_bvcmp( &mincsn, &sl->sl_head->se_csn ) >= 0 ) {
2598                                 do_present = 0;
2599                                 /* mutex is unlocked in playlog */
2600                                 syncprov_playlog( op, rs, sl, srs, ctxcsn, numcsns, sids );
2601                         } else {
2602                                 ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
2603                         }
2604                 }
2605                 /* Is the CSN still present in the database? */
2606                 if ( syncprov_findcsn( op, FIND_CSN ) != LDAP_SUCCESS ) {
2607                         /* No, so a reload is required */
2608                         /* the 2.2 consumer doesn't send this hint */
2609                         if ( si->si_usehint && srs->sr_rhint == 0 ) {
2610                                 if ( ctxcsn )
2611                                         ber_bvarray_free_x( ctxcsn, op->o_tmpmemctx );
2612                                 if ( sids )
2613                                         op->o_tmpfree( sids, op->o_tmpmemctx );
2614                                 rs->sr_err = LDAP_SYNC_REFRESH_REQUIRED;
2615                                 rs->sr_text = "sync cookie is stale";
2616                                 goto bailout;
2617                         }
2618                         if ( srs->sr_state.ctxcsn ) {
2619                                 ber_bvarray_free_x( srs->sr_state.ctxcsn, op->o_tmpmemctx );
2620                                 srs->sr_state.ctxcsn = NULL;
2621                         }
2622                         if ( srs->sr_state.sids ) {
2623                                 slap_sl_free( srs->sr_state.sids, op->o_tmpmemctx );
2624                                 srs->sr_state.sids = NULL;
2625                         }
2626                         srs->sr_state.numcsns = 0;
2627                 } else {
2628                         gotstate = 1;
2629                         /* If changed and doing Present lookup, send Present UUIDs */
2630                         if ( do_present && syncprov_findcsn( op, FIND_PRESENT ) !=
2631                                 LDAP_SUCCESS ) {
2632                                 if ( ctxcsn )
2633                                         ber_bvarray_free_x( ctxcsn, op->o_tmpmemctx );
2634                                 if ( sids )
2635                                         op->o_tmpfree( sids, op->o_tmpmemctx );
2636                                 goto bailout;
2637                         }
2638                 }
2639         } else {
2640                 /* No consumer state, assume something has changed */
2641                 changed = SS_CHANGED;
2642         }
2643
2644 shortcut:
2645         /* Append CSN range to search filter, save original filter
2646          * for persistent search evaluation
2647          */
2648         if ( sop ) {
2649                 sop->s_filterstr= op->ors_filterstr;
2650         }
2651
2652         /* If something changed, find the changes */
2653         if ( gotstate && ( changed || dirty ) ) {
2654                 Filter *fand, *fava;
2655
2656                 fand = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
2657                 fand->f_choice = LDAP_FILTER_AND;
2658                 fand->f_next = NULL;
2659                 fava = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
2660                 fand->f_and = fava;
2661                 fava->f_choice = LDAP_FILTER_GE;
2662                 fava->f_ava = op->o_tmpalloc( sizeof(AttributeAssertion), op->o_tmpmemctx );
2663                 fava->f_ava->aa_desc = slap_schema.si_ad_entryCSN;
2664 #ifdef LDAP_COMP_MATCH
2665                 fava->f_ava->aa_cf = NULL;
2666 #endif
2667                 ber_dupbv_x( &fava->f_ava->aa_value, &mincsn, op->o_tmpmemctx );
2668                 fava->f_next = op->ors_filter;
2669                 if ( sop )
2670                         ldap_pvt_thread_mutex_lock( &sop->s_mutex );
2671                 op->ors_filter = fand;
2672                 filter2bv_x( op, op->ors_filter, &op->ors_filterstr );
2673                 if ( sop ) {
2674                         sop->s_flags |= PS_FIX_FILTER;
2675                         ldap_pvt_thread_mutex_unlock( &sop->s_mutex );
2676                 }
2677         }
2678
2679         /* Let our callback add needed info to returned entries */
2680         cb = op->o_tmpcalloc(1, sizeof(slap_callback)+sizeof(searchstate), op->o_tmpmemctx);
2681         ss = (searchstate *)(cb+1);
2682         ss->ss_on = on;
2683         ss->ss_so = sop;
2684         ss->ss_flags = do_present | changed;
2685         ss->ss_ctxcsn = ctxcsn;
2686         ss->ss_numcsns = numcsns;
2687         ss->ss_sids = sids;
2688         cb->sc_response = syncprov_search_response;
2689         cb->sc_cleanup = syncprov_search_cleanup;
2690         cb->sc_private = ss;
2691         cb->sc_next = op->o_callback;
2692         op->o_callback = cb;
2693
2694         /* If this is a persistent search and no changes were reported during
2695          * the refresh phase, just invoke the response callback to transition
2696          * us into persist phase
2697          */
2698         if ( !changed && !dirty ) {
2699                 rs->sr_err = LDAP_SUCCESS;
2700                 rs->sr_nentries = 0;
2701                 send_ldap_result( op, rs );
2702                 return rs->sr_err;
2703         }
2704         return SLAP_CB_CONTINUE;
2705 }
2706
2707 static int
2708 syncprov_operational(
2709         Operation *op,
2710         SlapReply *rs )
2711 {
2712         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
2713         syncprov_info_t         *si = (syncprov_info_t *)on->on_bi.bi_private;
2714
2715         /* This prevents generating unnecessarily; frontend will strip
2716          * any statically stored copy.
2717          */
2718         if ( op->o_sync != SLAP_CONTROL_NONE )
2719                 return SLAP_CB_CONTINUE;
2720
2721         if ( rs->sr_entry &&
2722                 dn_match( &rs->sr_entry->e_nname, &si->si_contextdn )) {
2723
2724                 if ( SLAP_OPATTRS( rs->sr_attr_flags ) ||
2725                         ad_inlist( slap_schema.si_ad_contextCSN, rs->sr_attrs )) {
2726                         Attribute *a, **ap = NULL;
2727
2728                         for ( a=rs->sr_entry->e_attrs; a; a=a->a_next ) {
2729                                 if ( a->a_desc == slap_schema.si_ad_contextCSN )
2730                                         break;
2731                         }
2732
2733                         ldap_pvt_thread_rdwr_rlock( &si->si_csn_rwlock );
2734                         if ( si->si_ctxcsn ) {
2735                                 if ( !a ) {
2736                                         for ( ap = &rs->sr_operational_attrs; *ap;
2737                                                 ap=&(*ap)->a_next );
2738
2739                                         a = attr_alloc( slap_schema.si_ad_contextCSN );
2740                                         *ap = a;
2741                                 }
2742
2743                                 if ( !ap ) {
2744                                         if ( !(rs->sr_flags & REP_ENTRY_MODIFIABLE) ) {
2745                                                 Entry *e = entry_dup( rs->sr_entry );
2746                                                 if ( rs->sr_flags & REP_ENTRY_MUSTRELEASE ) {
2747                                                         overlay_entry_release_ov( op, rs->sr_entry, 0, on );
2748                                                         rs->sr_flags ^= REP_ENTRY_MUSTRELEASE;
2749                                                 } else if ( rs->sr_flags & REP_ENTRY_MUSTBEFREED ) {
2750                                                         entry_free( rs->sr_entry );
2751                                                 }
2752                                                 rs->sr_entry = e;
2753                                                 rs->sr_flags |=
2754                                                         REP_ENTRY_MODIFIABLE|REP_ENTRY_MUSTBEFREED;
2755                                                 a = attr_find( rs->sr_entry->e_attrs,
2756                                                         slap_schema.si_ad_contextCSN );
2757                                         }
2758                                         if ( a->a_nvals != a->a_vals ) {
2759                                                 ber_bvarray_free( a->a_nvals );
2760                                         }
2761                                         a->a_nvals = NULL;
2762                                         ber_bvarray_free( a->a_vals );
2763                                         a->a_vals = NULL;
2764                                         a->a_numvals = 0;
2765                                 }
2766                                 attr_valadd( a, si->si_ctxcsn, si->si_ctxcsn, si->si_numcsns );
2767                         }
2768                         ldap_pvt_thread_rdwr_runlock( &si->si_csn_rwlock );
2769                 }
2770         }
2771         return SLAP_CB_CONTINUE;
2772 }
2773
2774 enum {
2775         SP_CHKPT = 1,
2776         SP_SESSL,
2777         SP_NOPRES,
2778         SP_USEHINT
2779 };
2780
2781 static ConfigDriver sp_cf_gen;
2782
2783 static ConfigTable spcfg[] = {
2784         { "syncprov-checkpoint", "ops> <minutes", 3, 3, 0, ARG_MAGIC|SP_CHKPT,
2785                 sp_cf_gen, "( OLcfgOvAt:1.1 NAME 'olcSpCheckpoint' "
2786                         "DESC 'ContextCSN checkpoint interval in ops and minutes' "
2787                         "SYNTAX OMsDirectoryString SINGLE-VALUE )", NULL, NULL },
2788         { "syncprov-sessionlog", "ops", 2, 2, 0, ARG_INT|ARG_MAGIC|SP_SESSL,
2789                 sp_cf_gen, "( OLcfgOvAt:1.2 NAME 'olcSpSessionlog' "
2790                         "DESC 'Session log size in ops' "
2791                         "SYNTAX OMsInteger SINGLE-VALUE )", NULL, NULL },
2792         { "syncprov-nopresent", NULL, 2, 2, 0, ARG_ON_OFF|ARG_MAGIC|SP_NOPRES,
2793                 sp_cf_gen, "( OLcfgOvAt:1.3 NAME 'olcSpNoPresent' "
2794                         "DESC 'Omit Present phase processing' "
2795                         "SYNTAX OMsBoolean SINGLE-VALUE )", NULL, NULL },
2796         { "syncprov-reloadhint", NULL, 2, 2, 0, ARG_ON_OFF|ARG_MAGIC|SP_USEHINT,
2797                 sp_cf_gen, "( OLcfgOvAt:1.4 NAME 'olcSpReloadHint' "
2798                         "DESC 'Observe Reload Hint in Request control' "
2799                         "SYNTAX OMsBoolean SINGLE-VALUE )", NULL, NULL },
2800         { NULL, NULL, 0, 0, 0, ARG_IGNORED }
2801 };
2802
2803 static ConfigOCs spocs[] = {
2804         { "( OLcfgOvOc:1.1 "
2805                 "NAME 'olcSyncProvConfig' "
2806                 "DESC 'SyncRepl Provider configuration' "
2807                 "SUP olcOverlayConfig "
2808                 "MAY ( olcSpCheckpoint "
2809                         "$ olcSpSessionlog "
2810                         "$ olcSpNoPresent "
2811                         "$ olcSpReloadHint "
2812                 ") )",
2813                         Cft_Overlay, spcfg },
2814         { NULL, 0, NULL }
2815 };
2816
2817 static int
2818 sp_cf_gen(ConfigArgs *c)
2819 {
2820         slap_overinst           *on = (slap_overinst *)c->bi;
2821         syncprov_info_t         *si = (syncprov_info_t *)on->on_bi.bi_private;
2822         int rc = 0;
2823
2824         if ( c->op == SLAP_CONFIG_EMIT ) {
2825                 switch ( c->type ) {
2826                 case SP_CHKPT:
2827                         if ( si->si_chkops || si->si_chktime ) {
2828                                 struct berval bv;
2829                                 /* we assume si_chktime is a multiple of 60
2830                                  * because the parsed value was originally
2831                                  * multiplied by 60 */
2832                                 bv.bv_len = snprintf( c->cr_msg, sizeof( c->cr_msg ),
2833                                         "%d %d", si->si_chkops, si->si_chktime/60 );
2834                                 if ( bv.bv_len >= sizeof( c->cr_msg ) ) {
2835                                         rc = 1;
2836                                 } else {
2837                                         bv.bv_val = c->cr_msg;
2838                                         value_add_one( &c->rvalue_vals, &bv );
2839                                 }
2840                         } else {
2841                                 rc = 1;
2842                         }
2843                         break;
2844                 case SP_SESSL:
2845                         if ( si->si_logs ) {
2846                                 c->value_int = si->si_logs->sl_size;
2847                         } else {
2848                                 rc = 1;
2849                         }
2850                         break;
2851                 case SP_NOPRES:
2852                         if ( si->si_nopres ) {
2853                                 c->value_int = 1;
2854                         } else {
2855                                 rc = 1;
2856                         }
2857                         break;
2858                 case SP_USEHINT:
2859                         if ( si->si_usehint ) {
2860                                 c->value_int = 1;
2861                         } else {
2862                                 rc = 1;
2863                         }
2864                         break;
2865                 }
2866                 return rc;
2867         } else if ( c->op == LDAP_MOD_DELETE ) {
2868                 switch ( c->type ) {
2869                 case SP_CHKPT:
2870                         si->si_chkops = 0;
2871                         si->si_chktime = 0;
2872                         break;
2873                 case SP_SESSL:
2874                         if ( si->si_logs )
2875                                 si->si_logs->sl_size = 0;
2876                         else
2877                                 rc = LDAP_NO_SUCH_ATTRIBUTE;
2878                         break;
2879                 case SP_NOPRES:
2880                         if ( si->si_nopres )
2881                                 si->si_nopres = 0;
2882                         else
2883                                 rc = LDAP_NO_SUCH_ATTRIBUTE;
2884                         break;
2885                 case SP_USEHINT:
2886                         if ( si->si_usehint )
2887                                 si->si_usehint = 0;
2888                         else
2889                                 rc = LDAP_NO_SUCH_ATTRIBUTE;
2890                         break;
2891                 }
2892                 return rc;
2893         }
2894         switch ( c->type ) {
2895         case SP_CHKPT:
2896                 if ( lutil_atoi( &si->si_chkops, c->argv[1] ) != 0 ) {
2897                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s unable to parse checkpoint ops # \"%s\"",
2898                                 c->argv[0], c->argv[1] );
2899                         Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
2900                                 "%s: %s\n", c->log, c->cr_msg, 0 );
2901                         return ARG_BAD_CONF;
2902                 }
2903                 if ( si->si_chkops <= 0 ) {
2904                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s invalid checkpoint ops # \"%d\"",
2905                                 c->argv[0], si->si_chkops );
2906                         Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
2907                                 "%s: %s\n", c->log, c->cr_msg, 0 );
2908                         return ARG_BAD_CONF;
2909                 }
2910                 if ( lutil_atoi( &si->si_chktime, c->argv[2] ) != 0 ) {
2911                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s unable to parse checkpoint time \"%s\"",
2912                                 c->argv[0], c->argv[1] );
2913                         Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
2914                                 "%s: %s\n", c->log, c->cr_msg, 0 );
2915                         return ARG_BAD_CONF;
2916                 }
2917                 if ( si->si_chktime <= 0 ) {
2918                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s invalid checkpoint time \"%d\"",
2919                                 c->argv[0], si->si_chkops );
2920                         Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
2921                                 "%s: %s\n", c->log, c->cr_msg, 0 );
2922                         return ARG_BAD_CONF;
2923                 }
2924                 si->si_chktime *= 60;
2925                 break;
2926         case SP_SESSL: {
2927                 sessionlog *sl;
2928                 int size = c->value_int;
2929
2930                 if ( size < 0 ) {
2931                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s size %d is negative",
2932                                 c->argv[0], size );
2933                         Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
2934                                 "%s: %s\n", c->log, c->cr_msg, 0 );
2935                         return ARG_BAD_CONF;
2936                 }
2937                 sl = si->si_logs;
2938                 if ( !sl ) {
2939                         sl = ch_malloc( sizeof( sessionlog ) );
2940                         sl->sl_num = 0;
2941                         sl->sl_head = sl->sl_tail = NULL;
2942                         ldap_pvt_thread_mutex_init( &sl->sl_mutex );
2943                         si->si_logs = sl;
2944                 }
2945                 sl->sl_size = size;
2946                 }
2947                 break;
2948         case SP_NOPRES:
2949                 si->si_nopres = c->value_int;
2950                 break;
2951         case SP_USEHINT:
2952                 si->si_usehint = c->value_int;
2953                 break;
2954         }
2955         return rc;
2956 }
2957
2958 /* ITS#3456 we cannot run this search on the main thread, must use a
2959  * child thread in order to insure we have a big enough stack.
2960  */
2961 static void *
2962 syncprov_db_otask(
2963         void *ptr
2964 )
2965 {
2966         syncprov_findcsn( ptr, FIND_MAXCSN );
2967         return NULL;
2968 }
2969
2970 /* Read any existing contextCSN from the underlying db.
2971  * Then search for any entries newer than that. If no value exists,
2972  * just generate it. Cache whatever result.
2973  */
2974 static int
2975 syncprov_db_open(
2976         BackendDB *be,
2977         ConfigReply *cr
2978 )
2979 {
2980         slap_overinst   *on = (slap_overinst *) be->bd_info;
2981         syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
2982
2983         Connection conn = { 0 };
2984         OperationBuffer opbuf;
2985         Operation *op;
2986         Entry *e = NULL;
2987         Attribute *a;
2988         int rc;
2989         void *thrctx = NULL;
2990
2991         if ( !SLAP_LASTMOD( be )) {
2992                 Debug( LDAP_DEBUG_ANY,
2993                         "syncprov_db_open: invalid config, lastmod must be enabled\n", 0, 0, 0 );
2994                 return -1;
2995         }
2996
2997         if ( slapMode & SLAP_TOOL_MODE ) {
2998                 return 0;
2999         }
3000
3001         rc = overlay_register_control( be, LDAP_CONTROL_SYNC );
3002         if ( rc ) {
3003                 return rc;
3004         }
3005
3006         thrctx = ldap_pvt_thread_pool_context();
3007         connection_fake_init2( &conn, &opbuf, thrctx, 0 );
3008         op = &opbuf.ob_op;
3009         op->o_bd = be;
3010         op->o_dn = be->be_rootdn;
3011         op->o_ndn = be->be_rootndn;
3012
3013         if ( SLAP_SYNC_SUBENTRY( be )) {
3014                 build_new_dn( &si->si_contextdn, be->be_nsuffix,
3015                         (struct berval *)&slap_ldapsync_cn_bv, NULL );
3016         } else {
3017                 si->si_contextdn = be->be_nsuffix[0];
3018         }
3019         rc = overlay_entry_get_ov( op, &si->si_contextdn, NULL,
3020                 slap_schema.si_ad_contextCSN, 0, &e, on );
3021
3022         if ( e ) {
3023                 ldap_pvt_thread_t tid;
3024
3025                 a = attr_find( e->e_attrs, slap_schema.si_ad_contextCSN );
3026                 if ( a ) {
3027                         ber_bvarray_dup_x( &si->si_ctxcsn, a->a_vals, NULL );
3028                         si->si_numcsns = a->a_numvals;
3029                         si->si_sids = slap_parse_csn_sids( si->si_ctxcsn, a->a_numvals, NULL );
3030                 }
3031                 overlay_entry_release_ov( op, e, 0, on );
3032                 if ( si->si_ctxcsn && !SLAP_DBCLEAN( be )) {
3033                         op->o_req_dn = be->be_suffix[0];
3034                         op->o_req_ndn = be->be_nsuffix[0];
3035                         op->ors_scope = LDAP_SCOPE_SUBTREE;
3036                         ldap_pvt_thread_create( &tid, 0, syncprov_db_otask, op );
3037                         ldap_pvt_thread_join( tid, NULL );
3038                 }
3039         }
3040
3041         /* Didn't find a contextCSN, should we generate one? */
3042         if ( !si->si_ctxcsn ) {
3043                 char csnbuf[ LDAP_PVT_CSNSTR_BUFSIZE ];
3044                 struct berval csn;
3045
3046                 if ( SLAP_SYNC_SHADOW( op->o_bd )) {
3047                 /* If we're also a consumer, then don't generate anything.
3048                  * Wait for our provider to send it to us, or for a local
3049                  * modify if we have multimaster.
3050                  */
3051                         goto out;
3052                 }
3053                 csn.bv_val = csnbuf;
3054                 csn.bv_len = sizeof( csnbuf );
3055                 slap_get_csn( op, &csn, 0 );
3056                 value_add_one( &si->si_ctxcsn, &csn );
3057                 si->si_numcsns = 1;
3058                 si->si_sids = ch_malloc( sizeof(int) );
3059                 si->si_sids[0] = slap_serverID;
3060
3061                 /* make sure we do a checkpoint on close */
3062                 si->si_numops++;
3063         }
3064
3065 out:
3066         op->o_bd->bd_info = (BackendInfo *)on;
3067         return 0;
3068 }
3069
3070 /* Write the current contextCSN into the underlying db.
3071  */
3072 static int
3073 syncprov_db_close(
3074         BackendDB *be,
3075         ConfigReply *cr
3076 )
3077 {
3078     slap_overinst   *on = (slap_overinst *) be->bd_info;
3079     syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
3080 #ifdef SLAP_CONFIG_DELETE
3081         syncops *so, *sonext;
3082 #endif /* SLAP_CONFIG_DELETE */
3083
3084         if ( slapMode & SLAP_TOOL_MODE ) {
3085                 return 0;
3086         }
3087         if ( si->si_numops ) {
3088                 Connection conn = {0};
3089                 OperationBuffer opbuf;
3090                 Operation *op;
3091                 SlapReply rs = {REP_RESULT};
3092                 void *thrctx;
3093
3094                 thrctx = ldap_pvt_thread_pool_context();
3095                 connection_fake_init2( &conn, &opbuf, thrctx, 0 );
3096                 op = &opbuf.ob_op;
3097                 op->o_bd = be;
3098                 op->o_dn = be->be_rootdn;
3099                 op->o_ndn = be->be_rootndn;
3100                 syncprov_checkpoint( op, &rs, on );
3101         }
3102
3103 #ifdef SLAP_CONFIG_DELETE
3104         ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
3105         for ( so=si->si_ops, sonext=so;  so; so=sonext  ) {
3106                 SlapReply rs = {REP_RESULT};
3107                 rs.sr_err = LDAP_UNAVAILABLE;
3108                 send_ldap_result( so->s_op, &rs );
3109                 sonext=so->s_next;
3110                 syncprov_drop_psearch( so, 0);
3111         }
3112         si->si_ops=NULL;
3113         ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
3114         overlay_unregister_control( be, LDAP_CONTROL_SYNC );
3115 #endif /* SLAP_CONFIG_DELETE */
3116
3117     return 0;
3118 }
3119
3120 static int
3121 syncprov_db_init(
3122         BackendDB *be,
3123         ConfigReply *cr
3124 )
3125 {
3126         slap_overinst   *on = (slap_overinst *)be->bd_info;
3127         syncprov_info_t *si;
3128
3129         if ( SLAP_ISGLOBALOVERLAY( be ) ) {
3130                 Debug( LDAP_DEBUG_ANY,
3131                         "syncprov must be instantiated within a database.\n",
3132                         0, 0, 0 );
3133                 return 1;
3134         }
3135
3136         si = ch_calloc(1, sizeof(syncprov_info_t));
3137         on->on_bi.bi_private = si;
3138         ldap_pvt_thread_rdwr_init( &si->si_csn_rwlock );
3139         ldap_pvt_thread_mutex_init( &si->si_ops_mutex );
3140         ldap_pvt_thread_mutex_init( &si->si_mods_mutex );
3141         ldap_pvt_thread_mutex_init( &si->si_resp_mutex );
3142
3143         csn_anlist[0].an_desc = slap_schema.si_ad_entryCSN;
3144         csn_anlist[0].an_name = slap_schema.si_ad_entryCSN->ad_cname;
3145         csn_anlist[1].an_desc = slap_schema.si_ad_entryUUID;
3146         csn_anlist[1].an_name = slap_schema.si_ad_entryUUID->ad_cname;
3147
3148         uuid_anlist[0].an_desc = slap_schema.si_ad_entryUUID;
3149         uuid_anlist[0].an_name = slap_schema.si_ad_entryUUID->ad_cname;
3150
3151         return 0;
3152 }
3153
3154 static int
3155 syncprov_db_destroy(
3156         BackendDB *be,
3157         ConfigReply *cr
3158 )
3159 {
3160         slap_overinst   *on = (slap_overinst *)be->bd_info;
3161         syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
3162
3163         if ( si ) {
3164                 if ( si->si_logs ) {
3165                         slog_entry *se = si->si_logs->sl_head;
3166
3167                         while ( se ) {
3168                                 slog_entry *se_next = se->se_next;
3169                                 ch_free( se );
3170                                 se = se_next;
3171                         }
3172
3173                         ldap_pvt_thread_mutex_destroy(&si->si_logs->sl_mutex);
3174                         ch_free( si->si_logs );
3175                 }
3176                 if ( si->si_ctxcsn )
3177                         ber_bvarray_free( si->si_ctxcsn );
3178                 if ( si->si_sids )
3179                         ch_free( si->si_sids );
3180                 ldap_pvt_thread_mutex_destroy( &si->si_resp_mutex );
3181                 ldap_pvt_thread_mutex_destroy( &si->si_mods_mutex );
3182                 ldap_pvt_thread_mutex_destroy( &si->si_ops_mutex );
3183                 ldap_pvt_thread_rdwr_destroy( &si->si_csn_rwlock );
3184                 ch_free( si );
3185         }
3186
3187         return 0;
3188 }
3189
3190 static int syncprov_parseCtrl (
3191         Operation *op,
3192         SlapReply *rs,
3193         LDAPControl *ctrl )
3194 {
3195         ber_tag_t tag;
3196         BerElementBuffer berbuf;
3197         BerElement *ber = (BerElement *)&berbuf;
3198         ber_int_t mode;
3199         ber_len_t len;
3200         struct berval cookie = BER_BVNULL;
3201         sync_control *sr;
3202         int rhint = 0;
3203
3204         if ( op->o_sync != SLAP_CONTROL_NONE ) {
3205                 rs->sr_text = "Sync control specified multiple times";
3206                 return LDAP_PROTOCOL_ERROR;
3207         }
3208
3209         if ( op->o_pagedresults != SLAP_CONTROL_NONE ) {
3210                 rs->sr_text = "Sync control specified with pagedResults control";
3211                 return LDAP_PROTOCOL_ERROR;
3212         }
3213
3214         if ( BER_BVISNULL( &ctrl->ldctl_value ) ) {
3215                 rs->sr_text = "Sync control value is absent";
3216                 return LDAP_PROTOCOL_ERROR;
3217         }
3218
3219         if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
3220                 rs->sr_text = "Sync control value is empty";
3221                 return LDAP_PROTOCOL_ERROR;
3222         }
3223
3224         /* Parse the control value
3225          *      syncRequestValue ::= SEQUENCE {
3226          *              mode   ENUMERATED {
3227          *                      -- 0 unused
3228          *                      refreshOnly             (1),
3229          *                      -- 2 reserved
3230          *                      refreshAndPersist       (3)
3231          *              },
3232          *              cookie  syncCookie OPTIONAL
3233          *      }
3234          */
3235
3236         ber_init2( ber, &ctrl->ldctl_value, 0 );
3237
3238         if ( (tag = ber_scanf( ber, "{i" /*}*/, &mode )) == LBER_ERROR ) {
3239                 rs->sr_text = "Sync control : mode decoding error";
3240                 return LDAP_PROTOCOL_ERROR;
3241         }
3242
3243         switch( mode ) {
3244         case LDAP_SYNC_REFRESH_ONLY:
3245                 mode = SLAP_SYNC_REFRESH;
3246                 break;
3247         case LDAP_SYNC_REFRESH_AND_PERSIST:
3248                 mode = SLAP_SYNC_REFRESH_AND_PERSIST;
3249                 break;
3250         default:
3251                 rs->sr_text = "Sync control : unknown update mode";
3252                 return LDAP_PROTOCOL_ERROR;
3253         }
3254
3255         tag = ber_peek_tag( ber, &len );
3256
3257         if ( tag == LDAP_TAG_SYNC_COOKIE ) {
3258                 if (( ber_scanf( ber, /*{*/ "m", &cookie )) == LBER_ERROR ) {
3259                         rs->sr_text = "Sync control : cookie decoding error";
3260                         return LDAP_PROTOCOL_ERROR;
3261                 }
3262                 tag = ber_peek_tag( ber, &len );
3263         }
3264         if ( tag == LDAP_TAG_RELOAD_HINT ) {
3265                 if (( ber_scanf( ber, /*{*/ "b", &rhint )) == LBER_ERROR ) {
3266                         rs->sr_text = "Sync control : rhint decoding error";
3267                         return LDAP_PROTOCOL_ERROR;
3268                 }
3269         }
3270         if (( ber_scanf( ber, /*{*/ "}")) == LBER_ERROR ) {
3271                         rs->sr_text = "Sync control : decoding error";
3272                         return LDAP_PROTOCOL_ERROR;
3273         }
3274         sr = op->o_tmpcalloc( 1, sizeof(struct sync_control), op->o_tmpmemctx );
3275         sr->sr_rhint = rhint;
3276         if (!BER_BVISNULL(&cookie)) {
3277                 ber_dupbv_x( &sr->sr_state.octet_str, &cookie, op->o_tmpmemctx );
3278                 /* If parse fails, pretend no cookie was sent */
3279                 if ( slap_parse_sync_cookie( &sr->sr_state, op->o_tmpmemctx ) ||
3280                         sr->sr_state.rid == -1 ) {
3281                         if ( sr->sr_state.ctxcsn ) {
3282                                 ber_bvarray_free_x( sr->sr_state.ctxcsn, op->o_tmpmemctx );
3283                                 sr->sr_state.ctxcsn = NULL;
3284                         }
3285                         sr->sr_state.numcsns = 0;
3286                 }
3287         }
3288
3289         op->o_controls[slap_cids.sc_LDAPsync] = sr;
3290
3291         op->o_sync = ctrl->ldctl_iscritical
3292                 ? SLAP_CONTROL_CRITICAL
3293                 : SLAP_CONTROL_NONCRITICAL;
3294
3295         op->o_sync_mode |= mode;        /* o_sync_mode shares o_sync */
3296
3297         return LDAP_SUCCESS;
3298 }
3299
3300 /* This overlay is set up for dynamic loading via moduleload. For static
3301  * configuration, you'll need to arrange for the slap_overinst to be
3302  * initialized and registered by some other function inside slapd.
3303  */
3304
3305 static slap_overinst            syncprov;
3306
3307 int
3308 syncprov_initialize()
3309 {
3310         int rc;
3311
3312         rc = register_supported_control( LDAP_CONTROL_SYNC,
3313                 SLAP_CTRL_SEARCH, NULL,
3314                 syncprov_parseCtrl, &slap_cids.sc_LDAPsync );
3315         if ( rc != LDAP_SUCCESS ) {
3316                 Debug( LDAP_DEBUG_ANY,
3317                         "syncprov_init: Failed to register control %d\n", rc, 0, 0 );
3318                 return rc;
3319         }
3320
3321         syncprov.on_bi.bi_type = "syncprov";
3322         syncprov.on_bi.bi_db_init = syncprov_db_init;
3323         syncprov.on_bi.bi_db_destroy = syncprov_db_destroy;
3324         syncprov.on_bi.bi_db_open = syncprov_db_open;
3325         syncprov.on_bi.bi_db_close = syncprov_db_close;
3326
3327         syncprov.on_bi.bi_op_abandon = syncprov_op_abandon;
3328         syncprov.on_bi.bi_op_cancel = syncprov_op_abandon;
3329
3330         syncprov.on_bi.bi_op_add = syncprov_op_mod;
3331         syncprov.on_bi.bi_op_compare = syncprov_op_compare;
3332         syncprov.on_bi.bi_op_delete = syncprov_op_mod;
3333         syncprov.on_bi.bi_op_modify = syncprov_op_mod;
3334         syncprov.on_bi.bi_op_modrdn = syncprov_op_mod;
3335         syncprov.on_bi.bi_op_search = syncprov_op_search;
3336         syncprov.on_bi.bi_extended = syncprov_op_extended;
3337         syncprov.on_bi.bi_operational = syncprov_operational;
3338
3339         syncprov.on_bi.bi_cf_ocs = spocs;
3340
3341         generic_filter.f_desc = slap_schema.si_ad_objectClass;
3342
3343         rc = config_register_schema( spcfg, spocs );
3344         if ( rc ) return rc;
3345
3346         return overlay_register( &syncprov );
3347 }
3348
3349 #if SLAPD_OVER_SYNCPROV == SLAPD_MOD_DYNAMIC
3350 int
3351 init_module( int argc, char *argv[] )
3352 {
3353         return syncprov_initialize();
3354 }
3355 #endif /* SLAPD_OVER_SYNCPROV == SLAPD_MOD_DYNAMIC */
3356
3357 #endif /* defined(SLAPD_OVER_SYNCPROV) */