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         if ( --so->s_inuse > 0 ) {
 789                 ldap_pvt_thread_mutex_unlock( &so->s_mutex );
 790                 return;
 791         }
 792         ldap_pvt_thread_mutex_unlock( &so->s_mutex );
 793         if ( so->s_flags & PS_IS_DETACHED ) {
 794                 filter_free( so->s_op->ors_filter );
 795                 for ( ga = so->s_op->o_groups; ga; ga=gnext ) {
 796                         gnext = ga->ga_next;
 797                         ch_free( ga );
 798                 }
 799                 ch_free( so->s_op );
 800         }
 801         ch_free( so->s_base.bv_val );
 802         for ( sr=so->s_res; sr; sr=srnext ) {
 803                 srnext = sr->s_next;
 804                 if ( sr->s_e ) {
 805                         if ( !dec_mutexint( sr->s_e->e_private )) {
 806                                 sr->s_e->e_private = NULL;
 807                                 entry_free( sr->s_e );
 808                         }
 809                 }
 810                 ch_free( sr );
 811         }
 812         ldap_pvt_thread_mutex_destroy( &so->s_mutex );
 813         ch_free( so );
 814 }
 815
 816 /* Send a persistent search response */
 817 static int
 818 syncprov_sendresp( Operation *op, opcookie *opc, syncops *so, int mode )
 819 {
 820         slap_overinst *on = opc->son;
 821
 822         SlapReply rs = { REP_SEARCH };
 823         LDAPControl *ctrls[2];
 824         struct berval cookie = BER_BVNULL, csns[2];
 825         Entry e_uuid = {0};
 826         Attribute a_uuid = {0};
 827
 828         if ( so->s_op->o_abandon )
 829                 return SLAPD_ABANDON;
 830
 831         ctrls[1] = NULL;
 832         if ( !BER_BVISNULL( &opc->sctxcsn )) {
 833                 csns[0] = opc->sctxcsn;
 834                 BER_BVZERO( &csns[1] );
 835                 slap_compose_sync_cookie( op, &cookie, csns, so->s_rid, slap_serverID ? slap_serverID : -1 );
 836         }
 837
 838 #ifdef LDAP_DEBUG
 839         if ( so->s_sid > 0 ) {
 840                 Debug( LDAP_DEBUG_SYNC, "syncprov_sendresp: to=%03x, cookie=%s\n",
 841                         so->s_sid, cookie.bv_val ? cookie.bv_val : "", 0 );
 842         } else {
 843                 Debug( LDAP_DEBUG_SYNC, "syncprov_sendresp: cookie=%s\n",
 844                         cookie.bv_val ? cookie.bv_val : "", 0, 0 );
 845         }
 846 #endif
 847
 848         e_uuid.e_attrs = &a_uuid;
 849         a_uuid.a_desc = slap_schema.si_ad_entryUUID;
 850         a_uuid.a_nvals = &opc->suuid;
 851         rs.sr_err = syncprov_state_ctrl( op, &rs, &e_uuid,
 852                 mode, ctrls, 0, 1, &cookie );
 853         if ( !BER_BVISNULL( &cookie )) {
 854                 op->o_tmpfree( cookie.bv_val, op->o_tmpmemctx );
 855         }
 856
 857         rs.sr_ctrls = ctrls;
 858         rs.sr_entry = &e_uuid;
 859         if ( mode == LDAP_SYNC_ADD || mode == LDAP_SYNC_MODIFY ) {
 860                 e_uuid = *opc->se;
 861                 e_uuid.e_private = NULL;
 862         }
 863
 864         switch( mode ) {
 865         case LDAP_SYNC_ADD:
 866                 if ( opc->sreference && so->s_op->o_managedsait <= SLAP_CONTROL_IGNORED ) {
 867                         rs.sr_ref = get_entry_referrals( op, rs.sr_entry );
 868                         rs.sr_err = send_search_reference( op, &rs );
 869                         ber_bvarray_free( rs.sr_ref );
 870                         break;
 871                 }
 872                 /* fallthru */
 873         case LDAP_SYNC_MODIFY:
 874                 rs.sr_attrs = op->ors_attrs;
 875                 rs.sr_err = send_search_entry( op, &rs );
 876                 break;
 877         case LDAP_SYNC_DELETE:
 878                 e_uuid.e_attrs = NULL;
 879                 e_uuid.e_name = opc->sdn;
 880                 e_uuid.e_nname = opc->sndn;
 881                 if ( opc->sreference && so->s_op->o_managedsait <= SLAP_CONTROL_IGNORED ) {
 882                         struct berval bv = BER_BVNULL;
 883                         rs.sr_ref = &bv;
 884                         rs.sr_err = send_search_reference( op, &rs );
 885                 } else {
 886                         rs.sr_err = send_search_entry( op, &rs );
 887                 }
 888                 break;
 889         default:
 890                 assert(0);
 891         }
 892         /* In case someone else freed it already? */
 893         if ( rs.sr_ctrls ) {
 894                 int i;
 895                 for ( i=0; rs.sr_ctrls[i]; i++ ) {
 896                         if ( rs.sr_ctrls[i] == ctrls[0] ) {
 897                                 op->o_tmpfree( ctrls[0]->ldctl_value.bv_val, op->o_tmpmemctx );
 898                                 ctrls[0]->ldctl_value.bv_val = NULL;
 899                                 break;
 900                         }
 901                 }
 902                 rs.sr_ctrls = NULL;
 903         }
 904
 905         return rs.sr_err;
 906 }
 907
 908 static void
 909 syncprov_qstart( syncops *so );
 910
 911 /* Play back queued responses */
 912 static int
 913 syncprov_qplay( Operation *op, syncops *so )
 914 {
 915         slap_overinst *on = LDAP_SLIST_FIRST(&so->s_op->o_extra)->oe_key;
 916         syncres *sr;
 917         Entry *e;
 918         opcookie opc;
 919         int rc = 0;
 920
 921         opc.son = on;
 922
 923         do {
 924                 ldap_pvt_thread_mutex_lock( &so->s_mutex );
 925                 sr = so->s_res;
 926                 if ( sr )
 927                         so->s_res = sr->s_next;
 928                 if ( !so->s_res )
 929                         so->s_restail = NULL;
 930                 /* Exit loop with mutex held */
 931                 if ( !sr || so->s_op->o_abandon )
 932                         break;
 933                 ldap_pvt_thread_mutex_unlock( &so->s_mutex );
 934
 935                 if ( sr->s_mode == LDAP_SYNC_NEW_COOKIE ) {
 936                         SlapReply rs = { REP_INTERMEDIATE };
 937
 938                         rc = syncprov_sendinfo( op, &rs, LDAP_TAG_SYNC_NEW_COOKIE,
 939                                 &sr->s_csn, 0, NULL, 0 );
 940                 } else {
 941                         opc.sdn = sr->s_dn;
 942                         opc.sndn = sr->s_ndn;
 943                         opc.suuid = sr->s_uuid;
 944                         opc.sctxcsn = sr->s_csn;
 945                         opc.sreference = sr->s_isreference;
 946                         opc.se = sr->s_e;
 947
 948                         rc = syncprov_sendresp( op, &opc, so, sr->s_mode );
 949
 950                 }
 951                 if ( sr->s_e ) {
 952                         if ( !dec_mutexint( sr->s_e->e_private )) {
 953                                 sr->s_e->e_private = NULL;
 954                                 entry_free ( sr->s_e );
 955                         }
 956                 }
 957
 958                 ch_free( sr );
 959
 960                 /* Exit loop with mutex held */
 961                 ldap_pvt_thread_mutex_lock( &so->s_mutex );
 962
 963         } while (0);
 964
 965         /* We now only send one change at a time, to prevent one
 966          * psearch from hogging all the CPU. Resubmit this task if
 967          * there are more responses queued and no errors occurred.
 968          */
 969
 970         if ( rc == 0 && so->s_res ) {
 971                 syncprov_qstart( so );
 972         } else {
 973                 so->s_flags ^= PS_TASK_QUEUED;
 974         }
 975
 976         ldap_pvt_thread_mutex_unlock( &so->s_mutex );
 977         return rc;
 978 }
 979
 980 /* task for playing back queued responses */
 981 static void *
 982 syncprov_qtask( void *ctx, void *arg )
 983 {
 984         syncops *so = arg;
 985         OperationBuffer opbuf;
 986         Operation *op;
 987         BackendDB be;
 988         int rc;
 989
 990         op = &opbuf.ob_op;
 991         *op = *so->s_op;
 992         op->o_hdr = &opbuf.ob_hdr;
 993         op->o_controls = opbuf.ob_controls;
 994         memset( op->o_controls, 0, sizeof(opbuf.ob_controls) );
 995
 996         *op->o_hdr = *so->s_op->o_hdr;
 997
 998         op->o_tmpmemctx = slap_sl_mem_create(SLAP_SLAB_SIZE, SLAP_SLAB_STACK, ctx, 1);
 999         op->o_tmpmfuncs = &slap_sl_mfuncs;
1000         op->o_threadctx = ctx;
1001
1002         /* syncprov_qplay expects a fake db */
1003         be = *so->s_op->o_bd;
1004         be.be_flags |= SLAP_DBFLAG_OVERLAY;
1005         op->o_bd = &be;
1006         LDAP_SLIST_FIRST(&op->o_extra) = NULL;
1007         op->o_callback = NULL;
1008
1009         rc = syncprov_qplay( op, so );
1010
1011         /* decrement use count... */
1012         syncprov_free_syncop( so );
1013
1014         return NULL;
1015 }
1016
1017 /* Start the task to play back queued psearch responses */
1018 static void
1019 syncprov_qstart( syncops *so )
1020 {
1021         so->s_flags |= PS_TASK_QUEUED;
1022         so->s_inuse++;
1023         ldap_pvt_thread_pool_submit( &connection_pool,
1024                 syncprov_qtask, so );
1025 }
1026
1027 /* Queue a persistent search response */
1028 static int
1029 syncprov_qresp( opcookie *opc, syncops *so, int mode )
1030 {
1031         syncres *sr;
1032         int srsize;
1033         struct berval cookie = opc->sctxcsn;
1034
1035         if ( mode == LDAP_SYNC_NEW_COOKIE ) {
1036                 syncprov_info_t *si = opc->son->on_bi.bi_private;
1037
1038                 slap_compose_sync_cookie( NULL, &cookie, si->si_ctxcsn,
1039                         so->s_rid, slap_serverID ? slap_serverID : -1);
1040         }
1041
1042         srsize = sizeof(syncres) + opc->suuid.bv_len + 1 +
1043                 opc->sdn.bv_len + 1 + opc->sndn.bv_len + 1;
1044         if ( cookie.bv_len )
1045                 srsize += cookie.bv_len + 1;
1046         sr = ch_malloc( srsize );
1047         sr->s_next = NULL;
1048         sr->s_e = opc->se;
1049         /* bump refcount on this entry */
1050         if ( opc->se )
1051                 inc_mutexint( opc->se->e_private );
1052         sr->s_dn.bv_val = (char *)(sr + 1);
1053         sr->s_dn.bv_len = opc->sdn.bv_len;
1054         sr->s_mode = mode;
1055         sr->s_isreference = opc->sreference;
1056         sr->s_ndn.bv_val = lutil_strcopy( sr->s_dn.bv_val,
1057                  opc->sdn.bv_val ) + 1;
1058         sr->s_ndn.bv_len = opc->sndn.bv_len;
1059         sr->s_uuid.bv_val = lutil_strcopy( sr->s_ndn.bv_val,
1060                  opc->sndn.bv_val ) + 1;
1061         sr->s_uuid.bv_len = opc->suuid.bv_len;
1062         AC_MEMCPY( sr->s_uuid.bv_val, opc->suuid.bv_val, opc->suuid.bv_len );
1063         if ( cookie.bv_len ) {
1064                 sr->s_csn.bv_val = sr->s_uuid.bv_val + sr->s_uuid.bv_len + 1;
1065                 strcpy( sr->s_csn.bv_val, cookie.bv_val );
1066         } else {
1067                 sr->s_csn.bv_val = NULL;
1068         }
1069         sr->s_csn.bv_len = cookie.bv_len;
1070
1071         if ( mode == LDAP_SYNC_NEW_COOKIE && cookie.bv_val ) {
1072                 ch_free( cookie.bv_val );
1073         }
1074
1075         ldap_pvt_thread_mutex_lock( &so->s_mutex );
1076         if ( !so->s_res ) {
1077                 so->s_res = sr;
1078         } else {
1079                 so->s_restail->s_next = sr;
1080         }
1081         so->s_restail = sr;
1082
1083         /* If the base of the psearch was modified, check it next time round */
1084         if ( so->s_flags & PS_WROTE_BASE ) {
1085                 so->s_flags ^= PS_WROTE_BASE;
1086                 so->s_flags |= PS_FIND_BASE;
1087         }
1088         if (( so->s_flags & (PS_IS_DETACHED|PS_TASK_QUEUED)) == PS_IS_DETACHED ) {
1089                 syncprov_qstart( so );
1090         }
1091         ldap_pvt_thread_mutex_unlock( &so->s_mutex );
1092         return LDAP_SUCCESS;
1093 }
1094
1095 static int
1096 syncprov_drop_psearch( syncops *so, int lock )
1097 {
1098         if ( so->s_flags & PS_IS_DETACHED ) {
1099                 if ( lock )
1100                         ldap_pvt_thread_mutex_lock( &so->s_op->o_conn->c_mutex );
1101                 so->s_op->o_conn->c_n_ops_executing--;
1102                 so->s_op->o_conn->c_n_ops_completed++;
1103                 LDAP_STAILQ_REMOVE( &so->s_op->o_conn->c_ops, so->s_op, Operation,
1104                         o_next );
1105                 if ( lock )
1106                         ldap_pvt_thread_mutex_unlock( &so->s_op->o_conn->c_mutex );
1107         }
1108         syncprov_free_syncop( so );
1109
1110         return 0;
1111 }
1112
1113 static int
1114 syncprov_ab_cleanup( Operation *op, SlapReply *rs )
1115 {
1116         slap_callback *sc = op->o_callback;
1117         op->o_callback = sc->sc_next;
1118         syncprov_drop_psearch( op->o_callback->sc_private, 0 );
1119         op->o_tmpfree( sc, op->o_tmpmemctx );
1120         return 0;
1121 }
1122
1123 static int
1124 syncprov_op_abandon( Operation *op, SlapReply *rs )
1125 {
1126         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
1127         syncprov_info_t         *si = on->on_bi.bi_private;
1128         syncops *so, *soprev;
1129
1130         ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
1131         for ( so=si->si_ops, soprev = (syncops *)&si->si_ops; so;
1132                 soprev=so, so=so->s_next ) {
1133                 if ( so->s_op->o_connid == op->o_connid &&
1134                         so->s_op->o_msgid == op->orn_msgid ) {
1135                                 so->s_op->o_abandon = 1;
1136                                 soprev->s_next = so->s_next;
1137                                 break;
1138                 }
1139         }
1140         ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
1141         if ( so ) {
1142                 /* Is this really a Cancel exop? */
1143                 if ( op->o_tag != LDAP_REQ_ABANDON ) {
1144                         so->s_op->o_cancel = SLAP_CANCEL_ACK;
1145                         rs->sr_err = LDAP_CANCELLED;
1146                         send_ldap_result( so->s_op, rs );
1147                         if ( so->s_flags & PS_IS_DETACHED ) {
1148                                 slap_callback *cb;
1149                                 cb = op->o_tmpcalloc( 1, sizeof(slap_callback), op->o_tmpmemctx );
1150                                 cb->sc_cleanup = syncprov_ab_cleanup;
1151                                 cb->sc_next = op->o_callback;
1152                                 cb->sc_private = so;
1153                                 return SLAP_CB_CONTINUE;
1154                         }
1155                 }
1156                 syncprov_drop_psearch( so, 0 );
1157         }
1158         return SLAP_CB_CONTINUE;
1159 }
1160
1161 /* Find which persistent searches are affected by this operation */
1162 static void
1163 syncprov_matchops( Operation *op, opcookie *opc, int saveit )
1164 {
1165         slap_overinst *on = opc->son;
1166         syncprov_info_t         *si = on->on_bi.bi_private;
1167
1168         fbase_cookie fc;
1169         syncops *ss, *sprev, *snext;
1170         Entry *e = NULL;
1171         Attribute *a;
1172         int rc;
1173         struct berval newdn;
1174         int freefdn = 0;
1175         BackendDB *b0 = op->o_bd, db;
1176
1177         fc.fdn = &op->o_req_ndn;
1178         /* compute new DN */
1179         if ( op->o_tag == LDAP_REQ_MODRDN && !saveit ) {
1180                 struct berval pdn;
1181                 if ( op->orr_nnewSup ) pdn = *op->orr_nnewSup;
1182                 else dnParent( fc.fdn, &pdn );
1183                 build_new_dn( &newdn, &pdn, &op->orr_nnewrdn, op->o_tmpmemctx );
1184                 fc.fdn = &newdn;
1185                 freefdn = 1;
1186         }
1187         if ( op->o_tag != LDAP_REQ_ADD ) {
1188                 if ( !SLAP_ISOVERLAY( op->o_bd )) {
1189                         db = *op->o_bd;
1190                         op->o_bd = &db;
1191                 }
1192                 rc = overlay_entry_get_ov( op, fc.fdn, NULL, NULL, 0, &e, on );
1193                 /* If we're sending responses now, make a copy and unlock the DB */
1194                 if ( e && !saveit ) {
1195                         if ( !opc->se ) {
1196                                 opc->se = entry_dup( e );
1197                                 opc->se->e_private = get_mutexint();
1198                         }
1199                         overlay_entry_release_ov( op, e, 0, on );
1200                         e = opc->se;
1201                 }
1202                 if ( rc ) {
1203                         op->o_bd = b0;
1204                         return;
1205                 }
1206         } else {
1207                 e = op->ora_e;
1208                 if ( !saveit ) {
1209                         if ( !opc->se ) {
1210                                 opc->se = entry_dup( e );
1211                                 opc->se->e_private = get_mutexint();
1212                         }
1213                         e = opc->se;
1214                 }
1215         }
1216
1217         if ( saveit || op->o_tag == LDAP_REQ_ADD ) {
1218                 ber_dupbv_x( &opc->sdn, &e->e_name, op->o_tmpmemctx );
1219                 ber_dupbv_x( &opc->sndn, &e->e_nname, op->o_tmpmemctx );
1220                 opc->sreference = is_entry_referral( e );
1221                 a = attr_find( e->e_attrs, slap_schema.si_ad_entryUUID );
1222                 if ( a )
1223                         ber_dupbv_x( &opc->suuid, &a->a_nvals[0], op->o_tmpmemctx );
1224         } else if ( op->o_tag == LDAP_REQ_MODRDN && !saveit ) {
1225                 op->o_tmpfree( opc->sndn.bv_val, op->o_tmpmemctx );
1226                 op->o_tmpfree( opc->sdn.bv_val, op->o_tmpmemctx );
1227                 ber_dupbv_x( &opc->sdn, &e->e_name, op->o_tmpmemctx );
1228                 ber_dupbv_x( &opc->sndn, &e->e_nname, op->o_tmpmemctx );
1229         }
1230
1231         ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
1232         for (ss = si->si_ops, sprev = (syncops *)&si->si_ops; ss;
1233                 sprev = ss, ss=snext)
1234         {
1235                 Operation op2;
1236                 Opheader oh;
1237                 syncmatches *sm;
1238                 int found = 0;
1239
1240                 snext = ss->s_next;
1241                 if ( ss->s_op->o_abandon )
1242                         continue;
1243
1244                 /* Don't send ops back to the originator */
1245                 if ( opc->osid > 0 && opc->osid == ss->s_sid ) {
1246                         Debug( LDAP_DEBUG_SYNC, "syncprov_matchops: skipping original sid %03x\n",
1247                                 opc->osid, 0, 0 );
1248                         continue;
1249                 }
1250
1251                 /* Don't send ops back to the messenger */
1252                 if ( opc->rsid > 0 && opc->rsid == ss->s_sid ) {
1253                         Debug( LDAP_DEBUG_SYNC, "syncprov_matchops: skipping relayed sid %03x\n",
1254                                 opc->rsid, 0, 0 );
1255                         continue;
1256                 }
1257
1258                 /* validate base */
1259                 fc.fss = ss;
1260                 fc.fbase = 0;
1261                 fc.fscope = 0;
1262
1263                 /* If the base of the search is missing, signal a refresh */
1264                 rc = syncprov_findbase( op, &fc );
1265                 if ( rc != LDAP_SUCCESS ) {
1266                         SlapReply rs = {REP_RESULT};
1267                         send_ldap_error( ss->s_op, &rs, LDAP_SYNC_REFRESH_REQUIRED,
1268                                 "search base has changed" );
1269                         sprev->s_next = snext;
1270                         syncprov_drop_psearch( ss, 1 );
1271                         ss = sprev;
1272                         continue;
1273                 }
1274
1275                 /* If we're sending results now, look for this op in old matches */
1276                 if ( !saveit ) {
1277                         syncmatches *old;
1278
1279                         /* Did we modify the search base? */
1280                         if ( dn_match( &op->o_req_ndn, &ss->s_base )) {
1281                                 ldap_pvt_thread_mutex_lock( &ss->s_mutex );
1282                                 ss->s_flags |= PS_WROTE_BASE;
1283                                 ldap_pvt_thread_mutex_unlock( &ss->s_mutex );
1284                         }
1285
1286                         for ( sm=opc->smatches, old=(syncmatches *)&opc->smatches; sm;
1287                                 old=sm, sm=sm->sm_next ) {
1288                                 if ( sm->sm_op == ss ) {
1289                                         found = 1;
1290                                         old->sm_next = sm->sm_next;
1291                                         op->o_tmpfree( sm, op->o_tmpmemctx );
1292                                         break;
1293                                 }
1294                         }
1295                 }
1296
1297                 if ( fc.fscope ) {
1298                         ldap_pvt_thread_mutex_lock( &ss->s_mutex );
1299                         op2 = *ss->s_op;
1300                         oh = *op->o_hdr;
1301                         oh.oh_conn = ss->s_op->o_conn;
1302                         oh.oh_connid = ss->s_op->o_connid;
1303                         op2.o_bd = op->o_bd->bd_self;
1304                         op2.o_hdr = &oh;
1305                         op2.o_extra = op->o_extra;
1306                         op2.o_callback = NULL;
1307                         if (ss->s_flags & PS_FIX_FILTER) {
1308                                 /* Skip the AND/GE clause that we stuck on in front. We
1309                                    would lose deletes/mods that happen during the refresh
1310                                    phase otherwise (ITS#6555) */
1311                                 op2.ors_filter = ss->s_op->ors_filter->f_and->f_next;
1312                         }
1313                         ldap_pvt_thread_mutex_unlock( &ss->s_mutex );
1314                         rc = test_filter( &op2, e, op2.ors_filter );
1315                 }
1316
1317                 Debug( LDAP_DEBUG_TRACE, "syncprov_matchops: sid %03x fscope %d rc %d\n",
1318                         ss->s_sid, fc.fscope, rc );
1319
1320                 /* check if current o_req_dn is in scope and matches filter */
1321                 if ( fc.fscope && rc == LDAP_COMPARE_TRUE ) {
1322                         if ( saveit ) {
1323                                 sm = op->o_tmpalloc( sizeof(syncmatches), op->o_tmpmemctx );
1324                                 sm->sm_next = opc->smatches;
1325                                 sm->sm_op = ss;
1326                                 ldap_pvt_thread_mutex_lock( &ss->s_mutex );
1327                                 ++ss->s_inuse;
1328                                 ldap_pvt_thread_mutex_unlock( &ss->s_mutex );
1329                                 opc->smatches = sm;
1330                         } else {
1331                                 /* if found send UPDATE else send ADD */
1332                                 syncprov_qresp( opc, ss,
1333                                         found ? LDAP_SYNC_MODIFY : LDAP_SYNC_ADD );
1334                         }
1335                 } else if ( !saveit && found ) {
1336                         /* send DELETE */
1337                         syncprov_qresp( opc, ss, LDAP_SYNC_DELETE );
1338                 } else if ( !saveit ) {
1339                         syncprov_qresp( opc, ss, LDAP_SYNC_NEW_COOKIE );
1340                 }
1341                 if ( !saveit && found ) {
1342                         /* Decrement s_inuse, was incremented when called
1343                          * with saveit == TRUE
1344                          */
1345                         syncprov_free_syncop( ss );
1346                 }
1347         }
1348         ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
1349
1350         if ( op->o_tag != LDAP_REQ_ADD && e ) {
1351                 if ( !SLAP_ISOVERLAY( op->o_bd )) {
1352                         op->o_bd = &db;
1353                 }
1354                 if ( saveit )
1355                         overlay_entry_release_ov( op, e, 0, on );
1356                 op->o_bd = b0;
1357         }
1358         if ( opc->se && !saveit ) {
1359                 if ( !dec_mutexint( opc->se->e_private )) {
1360                         opc->se->e_private = NULL;
1361                         entry_free( opc->se );
1362                         opc->se = NULL;
1363                 }
1364         }
1365         if ( freefdn ) {
1366                 op->o_tmpfree( fc.fdn->bv_val, op->o_tmpmemctx );
1367         }
1368         op->o_bd = b0;
1369 }
1370
1371 static int
1372 syncprov_op_cleanup( Operation *op, SlapReply *rs )
1373 {
1374         slap_callback *cb = op->o_callback;
1375         opcookie *opc = cb->sc_private;
1376         slap_overinst *on = opc->son;
1377         syncprov_info_t         *si = on->on_bi.bi_private;
1378         syncmatches *sm, *snext;
1379         modtarget *mt, mtdummy;
1380
1381         ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
1382         if ( si->si_active )
1383                 si->si_active--;
1384         ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
1385
1386         for (sm = opc->smatches; sm; sm=snext) {
1387                 snext = sm->sm_next;
1388                 syncprov_free_syncop( sm->sm_op );
1389                 op->o_tmpfree( sm, op->o_tmpmemctx );
1390         }
1391
1392         /* Remove op from lock table */
1393         mt = opc->smt;
1394         if ( mt ) {
1395                 ldap_pvt_thread_mutex_lock( &mt->mt_mutex );
1396                 mt->mt_mods = mt->mt_mods->mi_next;
1397                 /* If there are more, promote the next one */
1398                 if ( mt->mt_mods ) {
1399                         mt->mt_op = mt->mt_mods->mi_op;
1400                         ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
1401                 } else {
1402                         ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
1403                         ldap_pvt_thread_mutex_lock( &si->si_mods_mutex );
1404                         avl_delete( &si->si_mods, mt, sp_avl_cmp );
1405                         ldap_pvt_thread_mutex_unlock( &si->si_mods_mutex );
1406                         ldap_pvt_thread_mutex_destroy( &mt->mt_mutex );
1407                         ch_free( mt );
1408                 }
1409         }
1410         if ( !BER_BVISNULL( &opc->suuid ))
1411                 op->o_tmpfree( opc->suuid.bv_val, op->o_tmpmemctx );
1412         if ( !BER_BVISNULL( &opc->sndn ))
1413                 op->o_tmpfree( opc->sndn.bv_val, op->o_tmpmemctx );
1414         if ( !BER_BVISNULL( &opc->sdn ))
1415                 op->o_tmpfree( opc->sdn.bv_val, op->o_tmpmemctx );
1416         op->o_callback = cb->sc_next;
1417         op->o_tmpfree(cb, op->o_tmpmemctx);
1418
1419         return 0;
1420 }
1421
1422 static void
1423 syncprov_checkpoint( Operation *op, SlapReply *rs, slap_overinst *on )
1424 {
1425         syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
1426         Modifications mod;
1427         Operation opm;
1428         SlapReply rsm = { 0 };
1429         slap_callback cb = {0};
1430         BackendDB be;
1431         BackendInfo *bi;
1432
1433 #ifdef CHECK_CSN
1434         Syntax *syn = slap_schema.si_ad_contextCSN->ad_type->sat_syntax;
1435
1436         int i;
1437         for ( i=0; i<si->si_numcsns; i++ ) {
1438                 assert( !syn->ssyn_validate( syn, si->si_ctxcsn+i ));
1439         }
1440 #endif
1441         mod.sml_numvals = si->si_numcsns;
1442         mod.sml_values = si->si_ctxcsn;
1443         mod.sml_nvalues = NULL;
1444         mod.sml_desc = slap_schema.si_ad_contextCSN;
1445         mod.sml_op = LDAP_MOD_REPLACE;
1446         mod.sml_flags = SLAP_MOD_INTERNAL;
1447         mod.sml_next = NULL;
1448
1449         cb.sc_response = slap_null_cb;
1450         opm = *op;
1451         opm.o_tag = LDAP_REQ_MODIFY;
1452         opm.o_callback = &cb;
1453         opm.orm_modlist = &mod;
1454         opm.orm_no_opattrs = 1;
1455         if ( SLAP_GLUE_SUBORDINATE( op->o_bd )) {
1456                 be = *on->on_info->oi_origdb;
1457                 opm.o_bd = &be;
1458         }
1459         opm.o_req_dn = si->si_contextdn;
1460         opm.o_req_ndn = si->si_contextdn;
1461         bi = opm.o_bd->bd_info;
1462         opm.o_bd->bd_info = on->on_info->oi_orig;
1463         opm.o_managedsait = SLAP_CONTROL_NONCRITICAL;
1464         opm.o_no_schema_check = 1;
1465         opm.o_bd->be_modify( &opm, &rsm );
1466
1467         if ( rsm.sr_err == LDAP_NO_SUCH_OBJECT &&
1468                 SLAP_SYNC_SUBENTRY( opm.o_bd )) {
1469                 const char      *text;
1470                 char txtbuf[SLAP_TEXT_BUFLEN];
1471                 size_t textlen = sizeof txtbuf;
1472                 Entry *e = slap_create_context_csn_entry( opm.o_bd, NULL );
1473                 slap_mods2entry( &mod, &e, 0, 1, &text, txtbuf, textlen);
1474                 opm.ora_e = e;
1475                 opm.o_bd->be_add( &opm, &rsm );
1476                 if ( e == opm.ora_e )
1477                         be_entry_release_w( &opm, opm.ora_e );
1478         }
1479         opm.o_bd->bd_info = bi;
1480
1481         if ( mod.sml_next != NULL ) {
1482                 slap_mods_free( mod.sml_next, 1 );
1483         }
1484 #ifdef CHECK_CSN
1485         for ( i=0; i<si->si_numcsns; i++ ) {
1486                 assert( !syn->ssyn_validate( syn, si->si_ctxcsn+i ));
1487         }
1488 #endif
1489 }
1490
1491 static void
1492 syncprov_add_slog( Operation *op )
1493 {
1494         opcookie *opc = op->o_callback->sc_private;
1495         slap_overinst *on = opc->son;
1496         syncprov_info_t         *si = on->on_bi.bi_private;
1497         sessionlog *sl;
1498         slog_entry *se;
1499
1500         sl = si->si_logs;
1501         {
1502                 if ( BER_BVISEMPTY( &op->o_csn ) ) {
1503                         /* During the syncrepl refresh phase we can receive operations
1504                          * without a csn.  We cannot reliably determine the consumers
1505                          * state with respect to such operations, so we ignore them and
1506                          * wipe out anything in the log if we see them.
1507                          */
1508                         ldap_pvt_thread_mutex_lock( &sl->sl_mutex );
1509                         while ( se = sl->sl_head ) {
1510                                 sl->sl_head = se->se_next;
1511                                 ch_free( se );
1512                         }
1513                         sl->sl_tail = NULL;
1514                         sl->sl_num = 0;
1515                         ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
1516                         return;
1517                 }
1518
1519                 /* Allocate a record. UUIDs are not NUL-terminated. */
1520                 se = ch_malloc( sizeof( slog_entry ) + opc->suuid.bv_len +
1521                         op->o_csn.bv_len + 1 );
1522                 se->se_next = NULL;
1523                 se->se_tag = op->o_tag;
1524
1525                 se->se_uuid.bv_val = (char *)(&se[1]);
1526                 AC_MEMCPY( se->se_uuid.bv_val, opc->suuid.bv_val, opc->suuid.bv_len );
1527                 se->se_uuid.bv_len = opc->suuid.bv_len;
1528
1529                 se->se_csn.bv_val = se->se_uuid.bv_val + opc->suuid.bv_len;
1530                 AC_MEMCPY( se->se_csn.bv_val, op->o_csn.bv_val, op->o_csn.bv_len );
1531                 se->se_csn.bv_val[op->o_csn.bv_len] = '\0';
1532                 se->se_csn.bv_len = op->o_csn.bv_len;
1533                 se->se_sid = slap_parse_csn_sid( &se->se_csn );
1534
1535                 ldap_pvt_thread_mutex_lock( &sl->sl_mutex );
1536                 if ( sl->sl_head ) {
1537                         /* Keep the list in csn order. */
1538                         if ( ber_bvcmp( &sl->sl_tail->se_csn, &se->se_csn ) <= 0 ) {
1539                                 sl->sl_tail->se_next = se;
1540                                 sl->sl_tail = se;
1541                         } else {
1542                                 slog_entry **sep;
1543
1544                                 for ( sep = &sl->sl_head; *sep; sep = &(*sep)->se_next ) {
1545                                         if ( ber_bvcmp( &se->se_csn, &(*sep)->se_csn ) < 0 ) {
1546                                                 se->se_next = *sep;
1547                                                 *sep = se;
1548                                                 break;
1549                                         }
1550                                 }
1551                         }
1552                 } else {
1553                         sl->sl_head = se;
1554                         sl->sl_tail = se;
1555                 }
1556                 sl->sl_num++;
1557                 while ( sl->sl_num > sl->sl_size ) {
1558                         se = sl->sl_head;
1559                         sl->sl_head = se->se_next;
1560                         ch_free( se );
1561                         sl->sl_num--;
1562                 }
1563                 ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
1564         }
1565 }
1566
1567 /* Just set a flag if we found the matching entry */
1568 static int
1569 playlog_cb( Operation *op, SlapReply *rs )
1570 {
1571         if ( rs->sr_type == REP_SEARCH ) {
1572                 op->o_callback->sc_private = (void *)1;
1573         }
1574         return rs->sr_err;
1575 }
1576
1577 /* enter with sl->sl_mutex locked, release before returning */
1578 static void
1579 syncprov_playlog( Operation *op, SlapReply *rs, sessionlog *sl,
1580         sync_control *srs, BerVarray ctxcsn, int numcsns, int *sids )
1581 {
1582         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
1583         slog_entry *se;
1584         int i, j, ndel, num, nmods, mmods;
1585         char cbuf[LDAP_PVT_CSNSTR_BUFSIZE];
1586         BerVarray uuids;
1587         struct berval delcsn[2];
1588
1589         if ( !sl->sl_num ) {
1590                 ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
1591                 return;
1592         }
1593
1594         num = sl->sl_num;
1595         i = 0;
1596         nmods = 0;
1597
1598         uuids = op->o_tmpalloc( (num+1) * sizeof( struct berval ) +
1599                 num * UUID_LEN, op->o_tmpmemctx );
1600         uuids[0].bv_val = (char *)(uuids + num + 1);
1601
1602         delcsn[0].bv_len = 0;
1603         delcsn[0].bv_val = cbuf;
1604         BER_BVZERO(&delcsn[1]);
1605
1606         /* Make a copy of the relevant UUIDs. Put the Deletes up front
1607          * and everything else at the end. Do this first so we can
1608          * unlock the list mutex.
1609          */
1610         Debug( LDAP_DEBUG_SYNC, "srs csn %s\n",
1611                 srs->sr_state.ctxcsn[0].bv_val, 0, 0 );
1612         for ( se=sl->sl_head; se; se=se->se_next ) {
1613                 int k;
1614                 Debug( LDAP_DEBUG_SYNC, "log csn %s\n", se->se_csn.bv_val, 0, 0 );
1615                 ndel = 1;
1616                 for ( k=0; k<srs->sr_state.numcsns; k++ ) {
1617                         if ( se->se_sid == srs->sr_state.sids[k] ) {
1618                                 ndel = ber_bvcmp( &se->se_csn, &srs->sr_state.ctxcsn[k] );
1619                                 break;
1620                         }
1621                 }
1622                 if ( ndel <= 0 ) {
1623                         Debug( LDAP_DEBUG_SYNC, "cmp %d, too old\n", ndel, 0, 0 );
1624                         continue;
1625                 }
1626                 ndel = 0;
1627                 for ( k=0; k<numcsns; k++ ) {
1628                         if ( se->se_sid == sids[k] ) {
1629                                 ndel = ber_bvcmp( &se->se_csn, &ctxcsn[k] );
1630                                 break;
1631                         }
1632                 }
1633                 if ( ndel > 0 ) {
1634                         Debug( LDAP_DEBUG_SYNC, "cmp %d, too new\n", ndel, 0, 0 );
1635                         break;
1636                 }
1637                 if ( se->se_tag == LDAP_REQ_DELETE ) {
1638                         j = i;
1639                         i++;
1640                         AC_MEMCPY( cbuf, se->se_csn.bv_val, se->se_csn.bv_len );
1641                         delcsn[0].bv_len = se->se_csn.bv_len;
1642                         delcsn[0].bv_val[delcsn[0].bv_len] = '\0';
1643                 } else {
1644                         nmods++;
1645                         j = num - nmods;
1646                 }
1647                 uuids[j].bv_val = uuids[0].bv_val + (j * UUID_LEN);
1648                 AC_MEMCPY(uuids[j].bv_val, se->se_uuid.bv_val, UUID_LEN);
1649                 uuids[j].bv_len = UUID_LEN;
1650         }
1651         ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
1652
1653         ndel = i;
1654
1655         /* Zero out unused slots */
1656         for ( i=ndel; i < num - nmods; i++ )
1657                 uuids[i].bv_len = 0;
1658
1659         /* Mods must be validated to see if they belong in this delete set.
1660          */
1661
1662         mmods = nmods;
1663         /* Strip any duplicates */
1664         for ( i=0; i<nmods; i++ ) {
1665                 for ( j=0; j<ndel; j++ ) {
1666                         if ( bvmatch( &uuids[j], &uuids[num - 1 - i] )) {
1667                                 uuids[num - 1 - i].bv_len = 0;
1668                                 mmods --;
1669                                 break;
1670                         }
1671                 }
1672                 if ( uuids[num - 1 - i].bv_len == 0 ) continue;
1673                 for ( j=0; j<i; j++ ) {
1674                         if ( bvmatch( &uuids[num - 1 - j], &uuids[num - 1 - i] )) {
1675                                 uuids[num - 1 - i].bv_len = 0;
1676                                 mmods --;
1677                                 break;
1678                         }
1679                 }
1680         }
1681
1682         if ( mmods ) {
1683                 Operation fop;
1684                 SlapReply frs = { REP_RESULT };
1685                 int rc;
1686                 Filter mf, af;
1687                 AttributeAssertion eq = ATTRIBUTEASSERTION_INIT;
1688                 slap_callback cb = {0};
1689
1690                 fop = *op;
1691
1692                 fop.o_sync_mode = 0;
1693                 fop.o_callback = &cb;
1694                 fop.ors_limit = NULL;
1695                 fop.ors_tlimit = SLAP_NO_LIMIT;
1696                 fop.ors_attrs = slap_anlist_all_attributes;
1697                 fop.ors_attrsonly = 0;
1698                 fop.o_managedsait = SLAP_CONTROL_CRITICAL;
1699
1700                 af.f_choice = LDAP_FILTER_AND;
1701                 af.f_next = NULL;
1702                 af.f_and = &mf;
1703                 mf.f_choice = LDAP_FILTER_EQUALITY;
1704                 mf.f_ava = &eq;
1705                 mf.f_av_desc = slap_schema.si_ad_entryUUID;
1706                 mf.f_next = fop.ors_filter;
1707
1708                 fop.ors_filter = &af;
1709
1710                 cb.sc_response = playlog_cb;
1711                 fop.o_bd->bd_info = (BackendInfo *)on->on_info;
1712
1713                 for ( i=ndel; i<num; i++ ) {
1714                         if ( uuids[i].bv_len == 0 ) continue;
1715
1716                         mf.f_av_value = uuids[i];
1717                         cb.sc_private = NULL;
1718                         fop.ors_slimit = 1;
1719                         frs.sr_nentries = 0;
1720                         rc = fop.o_bd->be_search( &fop, &frs );
1721
1722                         /* If entry was not found, add to delete list */
1723                         if ( !cb.sc_private ) {
1724                                 uuids[ndel++] = uuids[i];
1725                         }
1726                 }
1727                 fop.o_bd->bd_info = (BackendInfo *)on;
1728         }
1729         if ( ndel ) {
1730                 struct berval cookie;
1731
1732                 if ( delcsn[0].bv_len ) {
1733                         slap_compose_sync_cookie( op, &cookie, delcsn, srs->sr_state.rid,
1734                                 slap_serverID ? slap_serverID : -1 );
1735
1736                         Debug( LDAP_DEBUG_SYNC, "syncprov_playlog: cookie=%s\n", cookie.bv_val, 0, 0 );
1737                 }
1738
1739                 uuids[ndel].bv_val = NULL;
1740                 syncprov_sendinfo( op, rs, LDAP_TAG_SYNC_ID_SET,
1741                         delcsn[0].bv_len ? &cookie : NULL, 0, uuids, 1 );
1742                 if ( delcsn[0].bv_len ) {
1743                         op->o_tmpfree( cookie.bv_val, op->o_tmpmemctx );
1744                 }
1745         }
1746         op->o_tmpfree( uuids, op->o_tmpmemctx );
1747 }
1748
1749 static int
1750 syncprov_op_response( Operation *op, SlapReply *rs )
1751 {
1752         opcookie *opc = op->o_callback->sc_private;
1753         slap_overinst *on = opc->son;
1754         syncprov_info_t         *si = on->on_bi.bi_private;
1755         syncmatches *sm;
1756
1757         if ( rs->sr_err == LDAP_SUCCESS )
1758         {
1759                 struct berval maxcsn;
1760                 char cbuf[LDAP_PVT_CSNSTR_BUFSIZE];
1761                 int do_check = 0, have_psearches, foundit, csn_changed = 0;
1762
1763                 ldap_pvt_thread_mutex_lock( &si->si_resp_mutex );
1764
1765                 /* Update our context CSN */
1766                 cbuf[0] = '\0';
1767                 maxcsn.bv_val = cbuf;
1768                 maxcsn.bv_len = sizeof(cbuf);
1769                 ldap_pvt_thread_rdwr_wlock( &si->si_csn_rwlock );
1770
1771                 slap_get_commit_csn( op, &maxcsn, &foundit );
1772                 if ( BER_BVISEMPTY( &maxcsn ) && SLAP_GLUE_SUBORDINATE( op->o_bd )) {
1773                         /* syncrepl queues the CSN values in the db where
1774                          * it is configured , not where the changes are made.
1775                          * So look for a value in the glue db if we didn't
1776                          * find any in this db.
1777                          */
1778                         BackendDB *be = op->o_bd;
1779                         op->o_bd = select_backend( &be->be_nsuffix[0], 1);
1780                         maxcsn.bv_val = cbuf;
1781                         maxcsn.bv_len = sizeof(cbuf);
1782                         slap_get_commit_csn( op, &maxcsn, &foundit );
1783                         op->o_bd = be;
1784                 }
1785                 if ( !BER_BVISEMPTY( &maxcsn ) ) {
1786                         int i, sid;
1787 #ifdef CHECK_CSN
1788                         Syntax *syn = slap_schema.si_ad_contextCSN->ad_type->sat_syntax;
1789                         assert( !syn->ssyn_validate( syn, &maxcsn ));
1790 #endif
1791                         sid = slap_parse_csn_sid( &maxcsn );
1792                         for ( i=0; i<si->si_numcsns; i++ ) {
1793                                 if ( sid == si->si_sids[i] ) {
1794                                         if ( ber_bvcmp( &maxcsn, &si->si_ctxcsn[i] ) > 0 ) {
1795                                                 ber_bvreplace( &si->si_ctxcsn[i], &maxcsn );
1796                                                 csn_changed = 1;
1797                                         }
1798                                         break;
1799                                 }
1800                         }
1801                         /* It's a new SID for us */
1802                         if ( i == si->si_numcsns ) {
1803                                 value_add_one( &si->si_ctxcsn, &maxcsn );
1804                                 csn_changed = 1;
1805                                 si->si_numcsns++;
1806                                 si->si_sids = ch_realloc( si->si_sids, si->si_numcsns *
1807                                         sizeof(int));
1808                                 si->si_sids[i] = sid;
1809                         }
1810                 }
1811
1812                 /* Don't do any processing for consumer contextCSN updates */
1813                 if ( op->o_dont_replicate ) {
1814                         if ( op->o_tag == LDAP_REQ_MODIFY &&
1815                                 op->orm_modlist->sml_op == LDAP_MOD_REPLACE &&
1816                                 op->orm_modlist->sml_desc == slap_schema.si_ad_contextCSN ) {
1817                         /* Catch contextCSN updates from syncrepl. We have to look at
1818                          * all the attribute values, as there may be more than one csn
1819                          * that changed, and only one can be passed in the csn queue.
1820                          */
1821                         Modifications *mod = op->orm_modlist;
1822                         int i, j, sid;
1823
1824                         for ( i=0; i<mod->sml_numvals; i++ ) {
1825                                 sid = slap_parse_csn_sid( &mod->sml_values[i] );
1826                                 for ( j=0; j<si->si_numcsns; j++ ) {
1827                                         if ( sid == si->si_sids[j] ) {
1828                                                 if ( ber_bvcmp( &mod->sml_values[i], &si->si_ctxcsn[j] ) > 0 ) {
1829                                                         ber_bvreplace( &si->si_ctxcsn[j], &mod->sml_values[i] );
1830                                                         csn_changed = 1;
1831                                                 }
1832                                                 break;
1833                                         }
1834                                 }
1835
1836                                 if ( j == si->si_numcsns ) {
1837                                         value_add_one( &si->si_ctxcsn, &mod->sml_values[i] );
1838                                         si->si_numcsns++;
1839                                         si->si_sids = ch_realloc( si->si_sids, si->si_numcsns *
1840                                                 sizeof(int));
1841                                         si->si_sids[j] = sid;
1842                                         csn_changed = 1;
1843                                 }
1844                         }
1845                         if ( csn_changed )
1846                                 si->si_dirty = 0;
1847                         ldap_pvt_thread_rdwr_wunlock( &si->si_csn_rwlock );
1848
1849                         if ( csn_changed ) {
1850                                 syncops *ss;
1851                                 ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
1852                                 for ( ss = si->si_ops; ss; ss = ss->s_next ) {
1853                                         if ( ss->s_op->o_abandon )
1854                                                 continue;
1855                                         /* Send the updated csn to all syncrepl consumers,
1856                                          * including the server from which it originated.
1857                                          * The syncrepl consumer and syncprov provider on
1858                                          * the originating server may be configured to store
1859                                          * their csn values in different entries.
1860                                          */
1861                                         syncprov_qresp( opc, ss, LDAP_SYNC_NEW_COOKIE );
1862                                 }
1863                                 ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
1864                         }
1865                         } else {
1866                         ldap_pvt_thread_rdwr_wunlock( &si->si_csn_rwlock );
1867                         }
1868                         goto leave;
1869                 }
1870
1871                 si->si_numops++;
1872                 if ( si->si_chkops || si->si_chktime ) {
1873                         /* Never checkpoint adding the context entry,
1874                          * it will deadlock
1875                          */
1876                         if ( op->o_tag != LDAP_REQ_ADD ||
1877                                 !dn_match( &op->o_req_ndn, &si->si_contextdn )) {
1878                                 if ( si->si_chkops && si->si_numops >= si->si_chkops ) {
1879                                         do_check = 1;
1880                                         si->si_numops = 0;
1881                                 }
1882                                 if ( si->si_chktime &&
1883                                         (op->o_time - si->si_chklast >= si->si_chktime )) {
1884                                         if ( si->si_chklast ) {
1885                                                 do_check = 1;
1886                                                 si->si_chklast = op->o_time;
1887                                         } else {
1888                                                 si->si_chklast = 1;
1889                                         }
1890                                 }
1891                         }
1892                 }
1893                 si->si_dirty = !csn_changed;
1894                 ldap_pvt_thread_rdwr_wunlock( &si->si_csn_rwlock );
1895
1896                 if ( do_check ) {
1897                         ldap_pvt_thread_rdwr_rlock( &si->si_csn_rwlock );
1898                         syncprov_checkpoint( op, rs, on );
1899                         ldap_pvt_thread_rdwr_runlock( &si->si_csn_rwlock );
1900                 }
1901
1902                 /* only update consumer ctx if this is a newer csn */
1903                 if ( csn_changed ) {
1904                         opc->sctxcsn = maxcsn;
1905                 }
1906
1907                 /* Handle any persistent searches */
1908                 ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
1909                 have_psearches = ( si->si_ops != NULL );
1910                 ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
1911                 if ( have_psearches ) {
1912                         switch(op->o_tag) {
1913                         case LDAP_REQ_ADD:
1914                         case LDAP_REQ_MODIFY:
1915                         case LDAP_REQ_MODRDN:
1916                         case LDAP_REQ_EXTENDED:
1917                                 syncprov_matchops( op, opc, 0 );
1918                                 break;
1919                         case LDAP_REQ_DELETE:
1920                                 /* for each match in opc->smatches:
1921                                  *   send DELETE msg
1922                                  */
1923                                 for ( sm = opc->smatches; sm; sm=sm->sm_next ) {
1924                                         if ( sm->sm_op->s_op->o_abandon )
1925                                                 continue;
1926                                         syncprov_qresp( opc, sm->sm_op, LDAP_SYNC_DELETE );
1927                                 }
1928                                 break;
1929                         }
1930                 }
1931
1932                 /* Add any log records */
1933                 if ( si->si_logs && op->o_tag != LDAP_REQ_ADD ) {
1934                         syncprov_add_slog( op );
1935                 }
1936 leave:          ldap_pvt_thread_mutex_unlock( &si->si_resp_mutex );
1937         }
1938         return SLAP_CB_CONTINUE;
1939 }
1940
1941 /* We don't use a subentry to store the context CSN any more.
1942  * We expose the current context CSN as an operational attribute
1943  * of the suffix entry.
1944  */
1945 static int
1946 syncprov_op_compare( Operation *op, SlapReply *rs )
1947 {
1948         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
1949         syncprov_info_t         *si = on->on_bi.bi_private;
1950         int rc = SLAP_CB_CONTINUE;
1951
1952         if ( dn_match( &op->o_req_ndn, &si->si_contextdn ) &&
1953                 op->oq_compare.rs_ava->aa_desc == slap_schema.si_ad_contextCSN )
1954         {
1955                 Entry e = {0};
1956                 Attribute a = {0};
1957
1958                 e.e_name = si->si_contextdn;
1959                 e.e_nname = si->si_contextdn;
1960                 e.e_attrs = &a;
1961
1962                 a.a_desc = slap_schema.si_ad_contextCSN;
1963
1964                 ldap_pvt_thread_rdwr_rlock( &si->si_csn_rwlock );
1965
1966                 a.a_vals = si->si_ctxcsn;
1967                 a.a_nvals = a.a_vals;
1968                 a.a_numvals = si->si_numcsns;
1969
1970                 rs->sr_err = access_allowed( op, &e, op->oq_compare.rs_ava->aa_desc,
1971                         &op->oq_compare.rs_ava->aa_value, ACL_COMPARE, NULL );
1972                 if ( ! rs->sr_err ) {
1973                         rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
1974                         goto return_results;
1975                 }
1976
1977                 if ( get_assert( op ) &&
1978                         ( test_filter( op, &e, get_assertion( op ) ) != LDAP_COMPARE_TRUE ) )
1979                 {
1980                         rs->sr_err = LDAP_ASSERTION_FAILED;
1981                         goto return_results;
1982                 }
1983
1984
1985                 rs->sr_err = LDAP_COMPARE_FALSE;
1986
1987                 if ( attr_valfind( &a,
1988                         SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
1989                                 SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
1990                                 &op->oq_compare.rs_ava->aa_value, NULL, op->o_tmpmemctx ) == 0 )
1991                 {
1992                         rs->sr_err = LDAP_COMPARE_TRUE;
1993                 }
1994
1995 return_results:;
1996
1997                 ldap_pvt_thread_rdwr_runlock( &si->si_csn_rwlock );
1998
1999                 send_ldap_result( op, rs );
2000
2001                 if( rs->sr_err == LDAP_COMPARE_FALSE || rs->sr_err == LDAP_COMPARE_TRUE ) {
2002                         rs->sr_err = LDAP_SUCCESS;
2003                 }
2004                 rc = rs->sr_err;
2005         }
2006
2007         return rc;
2008 }
2009
2010 static int
2011 syncprov_op_mod( Operation *op, SlapReply *rs )
2012 {
2013         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
2014         syncprov_info_t         *si = on->on_bi.bi_private;
2015         slap_callback *cb;
2016         opcookie *opc;
2017         int have_psearches, cbsize;
2018
2019         ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
2020         have_psearches = ( si->si_ops != NULL );
2021         si->si_active++;
2022         ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
2023
2024         cbsize = sizeof(slap_callback) + sizeof(opcookie) +
2025                 (have_psearches ? sizeof(modinst) : 0 );
2026
2027         cb = op->o_tmpcalloc(1, cbsize, op->o_tmpmemctx);
2028         opc = (opcookie *)(cb+1);
2029         opc->son = on;
2030         cb->sc_response = syncprov_op_response;
2031         cb->sc_cleanup = syncprov_op_cleanup;
2032         cb->sc_private = opc;
2033         cb->sc_next = op->o_callback;
2034         op->o_callback = cb;
2035
2036         opc->osid = -1;
2037         opc->rsid = -1;
2038         if ( op->o_csn.bv_val ) {
2039                 opc->osid = slap_parse_csn_sid( &op->o_csn );
2040         }
2041         if ( op->o_controls ) {
2042                 struct sync_cookie *scook =
2043                 op->o_controls[slap_cids.sc_LDAPsync];
2044                 if ( scook )
2045                         opc->rsid = scook->sid;
2046         }
2047
2048         /* If there are active persistent searches, lock this operation.
2049          * See seqmod.c for the locking logic on its own.
2050          */
2051         if ( have_psearches ) {
2052                 modtarget *mt, mtdummy;
2053                 modinst *mi;
2054
2055                 mi = (modinst *)(opc+1);
2056                 mi->mi_op = op;
2057
2058                 /* See if we're already modifying this entry... */
2059                 mtdummy.mt_op = op;
2060                 ldap_pvt_thread_mutex_lock( &si->si_mods_mutex );
2061                 mt = avl_find( si->si_mods, &mtdummy, sp_avl_cmp );
2062                 if ( mt ) {
2063                         ldap_pvt_thread_mutex_lock( &mt->mt_mutex );
2064                         if ( mt->mt_mods == NULL ) {
2065                                 /* Cannot reuse this mt, as another thread is about
2066                                  * to release it in syncprov_op_cleanup.
2067                                  */
2068                                 ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
2069                                 mt = NULL;
2070                         }
2071                 }
2072                 if ( mt ) {
2073                         ldap_pvt_thread_mutex_unlock( &si->si_mods_mutex );
2074                         mt->mt_tail->mi_next = mi;
2075                         mt->mt_tail = mi;
2076                         /* wait for this op to get to head of list */
2077                         while ( mt->mt_mods != mi ) {
2078                                 ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
2079                                 /* FIXME: if dynamic config can delete overlays or
2080                                  * databases we'll have to check for cleanup here.
2081                                  * Currently it's not an issue because there are
2082                                  * no dynamic config deletes...
2083                                  */
2084                                 if ( slapd_shutdown )
2085                                         return SLAPD_ABANDON;
2086
2087                                 if ( !ldap_pvt_thread_pool_pausecheck( &connection_pool ))
2088                                         ldap_pvt_thread_yield();
2089                                 ldap_pvt_thread_mutex_lock( &mt->mt_mutex );
2090
2091                                 /* clean up if the caller is giving up */
2092                                 if ( op->o_abandon ) {
2093                                         modinst *m2;
2094                                         for ( m2 = mt->mt_mods; m2->mi_next != mi;
2095                                                 m2 = m2->mi_next );
2096                                         m2->mi_next = mi->mi_next;
2097                                         if ( mt->mt_tail == mi ) mt->mt_tail = m2;
2098                                         op->o_tmpfree( cb, op->o_tmpmemctx );
2099                                         ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
2100                                         return SLAPD_ABANDON;
2101                                 }
2102                         }
2103                         ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
2104                 } else {
2105                         /* Record that we're modifying this entry now */
2106                         mt = ch_malloc( sizeof(modtarget) );
2107                         mt->mt_mods = mi;
2108                         mt->mt_tail = mi;
2109                         mt->mt_op = mi->mi_op;
2110                         ldap_pvt_thread_mutex_init( &mt->mt_mutex );
2111                         avl_insert( &si->si_mods, mt, sp_avl_cmp, avl_dup_error );
2112                         ldap_pvt_thread_mutex_unlock( &si->si_mods_mutex );
2113                 }
2114                 opc->smt = mt;
2115         }
2116
2117         if (( have_psearches || si->si_logs ) && op->o_tag != LDAP_REQ_ADD )
2118                 syncprov_matchops( op, opc, 1 );
2119
2120         return SLAP_CB_CONTINUE;
2121 }
2122
2123 static int
2124 syncprov_op_extended( Operation *op, SlapReply *rs )
2125 {
2126         if ( exop_is_write( op ))
2127                 return syncprov_op_mod( op, rs );
2128
2129         return SLAP_CB_CONTINUE;
2130 }
2131
2132 typedef struct searchstate {
2133         slap_overinst *ss_on;
2134         syncops *ss_so;
2135         BerVarray ss_ctxcsn;
2136         int *ss_sids;
2137         int ss_numcsns;
2138 #define SS_PRESENT      0x01
2139 #define SS_CHANGED      0x02
2140         int ss_flags;
2141 } searchstate;
2142
2143 static int
2144 syncprov_search_cleanup( Operation *op, SlapReply *rs )
2145 {
2146         if ( rs->sr_ctrls ) {
2147                 op->o_tmpfree( rs->sr_ctrls[0], op->o_tmpmemctx );
2148                 op->o_tmpfree( rs->sr_ctrls, op->o_tmpmemctx );
2149                 rs->sr_ctrls = NULL;
2150         }
2151         return 0;
2152 }
2153
2154 typedef struct SyncOperationBuffer {
2155         Operation               sob_op;
2156         Opheader                sob_hdr;
2157         OpExtra                 sob_oe;
2158         AttributeName   sob_extra;      /* not always present */
2159         /* Further data allocated here */
2160 } SyncOperationBuffer;
2161
2162 static void
2163 syncprov_detach_op( Operation *op, syncops *so, slap_overinst *on )
2164 {
2165         SyncOperationBuffer *sopbuf2;
2166         Operation *op2;
2167         int i, alen = 0;
2168         size_t size;
2169         char *ptr;
2170         GroupAssertion *g1, *g2;
2171
2172         /* count the search attrs */
2173         for (i=0; op->ors_attrs && !BER_BVISNULL( &op->ors_attrs[i].an_name ); i++) {
2174                 alen += op->ors_attrs[i].an_name.bv_len + 1;
2175         }
2176         /* Make a new copy of the operation */
2177         size = offsetof( SyncOperationBuffer, sob_extra ) +
2178                 (i ? ( (i+1) * sizeof(AttributeName) + alen) : 0) +
2179                 op->o_req_dn.bv_len + 1 +
2180                 op->o_req_ndn.bv_len + 1 +
2181                 op->o_ndn.bv_len + 1 +
2182                 so->s_filterstr.bv_len + 1;
2183         sopbuf2 = ch_calloc( 1, size );
2184         op2 = &sopbuf2->sob_op;
2185         op2->o_hdr = &sopbuf2->sob_hdr;
2186         LDAP_SLIST_FIRST(&op2->o_extra) = &sopbuf2->sob_oe;
2187
2188         /* Copy the fields we care about explicitly, leave the rest alone */
2189         *op2->o_hdr = *op->o_hdr;
2190         op2->o_tag = op->o_tag;
2191         op2->o_time = op->o_time;
2192         op2->o_bd = on->on_info->oi_origdb;
2193         op2->o_request = op->o_request;
2194         op2->o_managedsait = op->o_managedsait;
2195         LDAP_SLIST_FIRST(&op2->o_extra)->oe_key = on;
2196         LDAP_SLIST_NEXT(LDAP_SLIST_FIRST(&op2->o_extra), oe_next) = NULL;
2197
2198         ptr = (char *) sopbuf2 + offsetof( SyncOperationBuffer, sob_extra );
2199         if ( i ) {
2200                 op2->ors_attrs = (AttributeName *) ptr;
2201                 ptr = (char *) &op2->ors_attrs[i+1];
2202                 for (i=0; !BER_BVISNULL( &op->ors_attrs[i].an_name ); i++) {
2203                         op2->ors_attrs[i] = op->ors_attrs[i];
2204                         op2->ors_attrs[i].an_name.bv_val = ptr;
2205                         ptr = lutil_strcopy( ptr, op->ors_attrs[i].an_name.bv_val ) + 1;
2206                 }
2207                 BER_BVZERO( &op2->ors_attrs[i].an_name );
2208         }
2209
2210         op2->o_authz = op->o_authz;
2211         op2->o_ndn.bv_val = ptr;
2212         ptr = lutil_strcopy(ptr, op->o_ndn.bv_val) + 1;
2213         op2->o_dn = op2->o_ndn;
2214         op2->o_req_dn.bv_len = op->o_req_dn.bv_len;
2215         op2->o_req_dn.bv_val = ptr;
2216         ptr = lutil_strcopy(ptr, op->o_req_dn.bv_val) + 1;
2217         op2->o_req_ndn.bv_len = op->o_req_ndn.bv_len;
2218         op2->o_req_ndn.bv_val = ptr;
2219         ptr = lutil_strcopy(ptr, op->o_req_ndn.bv_val) + 1;
2220         op2->ors_filterstr.bv_val = ptr;
2221         strcpy( ptr, so->s_filterstr.bv_val );
2222         op2->ors_filterstr.bv_len = so->s_filterstr.bv_len;
2223
2224         /* Skip the AND/GE clause that we stuck on in front */
2225         if ( so->s_flags & PS_FIX_FILTER ) {
2226                 op2->ors_filter = op->ors_filter->f_and->f_next;
2227                 so->s_flags ^= PS_FIX_FILTER;
2228         } else {
2229                 op2->ors_filter = op->ors_filter;
2230         }
2231         op2->ors_filter = filter_dup( op2->ors_filter, NULL );
2232         so->s_op = op2;
2233
2234         /* Copy any cached group ACLs individually */
2235         op2->o_groups = NULL;
2236         for ( g1=op->o_groups; g1; g1=g1->ga_next ) {
2237                 g2 = ch_malloc( sizeof(GroupAssertion) + g1->ga_len );
2238                 *g2 = *g1;
2239                 strcpy( g2->ga_ndn, g1->ga_ndn );
2240                 g2->ga_next = op2->o_groups;
2241                 op2->o_groups = g2;
2242         }
2243         /* Don't allow any further group caching */
2244         op2->o_do_not_cache = 1;
2245
2246         /* Add op2 to conn so abandon will find us */
2247         op->o_conn->c_n_ops_executing++;
2248         op->o_conn->c_n_ops_completed--;
2249         LDAP_STAILQ_INSERT_TAIL( &op->o_conn->c_ops, op2, o_next );
2250         so->s_flags |= PS_IS_DETACHED;
2251
2252         /* Prevent anyone else from trying to send a result for this op */
2253         op->o_abandon = 1;
2254 }
2255
2256 static int
2257 syncprov_search_response( Operation *op, SlapReply *rs )
2258 {
2259         searchstate *ss = op->o_callback->sc_private;
2260         slap_overinst *on = ss->ss_on;
2261         syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
2262         sync_control *srs = op->o_controls[slap_cids.sc_LDAPsync];
2263
2264         if ( rs->sr_type == REP_SEARCH || rs->sr_type == REP_SEARCHREF ) {
2265                 Attribute *a;
2266                 /* If we got a referral without a referral object, there's
2267                  * something missing that we cannot replicate. Just ignore it.
2268                  * The consumer will abort because we didn't send the expected
2269                  * control.
2270                  */
2271                 if ( !rs->sr_entry ) {
2272                         assert( rs->sr_entry != NULL );
2273                         Debug( LDAP_DEBUG_ANY, "bogus referral in context\n",0,0,0 );
2274                         return SLAP_CB_CONTINUE;
2275                 }
2276                 a = attr_find( rs->sr_entry->e_attrs, slap_schema.si_ad_entryCSN );
2277                 if ( a == NULL && rs->sr_operational_attrs != NULL ) {
2278                         a = attr_find( rs->sr_operational_attrs, slap_schema.si_ad_entryCSN );
2279                 }
2280                 if ( a ) {
2281                         int i, sid;
2282                         sid = slap_parse_csn_sid( &a->a_nvals[0] );
2283
2284                         /* Don't send changed entries back to the originator */
2285                         if ( sid == srs->sr_state.sid && srs->sr_state.numcsns ) {
2286                                 Debug( LDAP_DEBUG_SYNC,
2287                                         "Entry %s changed by peer, ignored\n",
2288                                         rs->sr_entry->e_name.bv_val, 0, 0 );
2289                                 return LDAP_SUCCESS;
2290                         }
2291
2292                         /* If not a persistent search */
2293                         if ( !ss->ss_so ) {
2294                                 /* Make sure entry is less than the snapshot'd contextCSN */
2295                                 for ( i=0; i<ss->ss_numcsns; i++ ) {
2296                                         if ( sid == ss->ss_sids[i] && ber_bvcmp( &a->a_nvals[0],
2297                                                 &ss->ss_ctxcsn[i] ) > 0 ) {
2298                                                 Debug( LDAP_DEBUG_SYNC,
2299                                                         "Entry %s CSN %s greater than snapshot %s\n",
2300                                                         rs->sr_entry->e_name.bv_val,
2301                                                         a->a_nvals[0].bv_val,
2302                                                         ss->ss_ctxcsn[i].bv_val );
2303                                                 return LDAP_SUCCESS;
2304                                         }
2305                                 }
2306                         }
2307
2308                         /* Don't send old entries twice */
2309                         if ( srs->sr_state.ctxcsn ) {
2310                                 for ( i=0; i<srs->sr_state.numcsns; i++ ) {
2311                                         if ( sid == srs->sr_state.sids[i] &&
2312                                                 ber_bvcmp( &a->a_nvals[0],
2313                                                         &srs->sr_state.ctxcsn[i] )<= 0 ) {
2314                                                 Debug( LDAP_DEBUG_SYNC,
2315                                                         "Entry %s CSN %s older or equal to ctx %s\n",
2316                                                         rs->sr_entry->e_name.bv_val,
2317                                                         a->a_nvals[0].bv_val,
2318                                                         srs->sr_state.ctxcsn[i].bv_val );
2319                                                 return LDAP_SUCCESS;
2320                                         }
2321                                 }
2322                         }
2323                 }
2324                 rs->sr_ctrls = op->o_tmpalloc( sizeof(LDAPControl *)*2,
2325                         op->o_tmpmemctx );
2326                 rs->sr_ctrls[1] = NULL;
2327                 /* If we're in delta-sync mode, always send a cookie */
2328                 if ( si->si_nopres && si->si_usehint && a ) {
2329                         struct berval cookie;
2330                         slap_compose_sync_cookie( op, &cookie, a->a_nvals, srs->sr_state.rid, slap_serverID ? slap_serverID : -1 );
2331                         rs->sr_err = syncprov_state_ctrl( op, rs, rs->sr_entry,
2332                                 LDAP_SYNC_ADD, rs->sr_ctrls, 0, 1, &cookie );
2333                 } else {
2334                         rs->sr_err = syncprov_state_ctrl( op, rs, rs->sr_entry,
2335                                 LDAP_SYNC_ADD, rs->sr_ctrls, 0, 0, NULL );
2336                 }
2337         } else if ( rs->sr_type == REP_RESULT && rs->sr_err == LDAP_SUCCESS ) {
2338                 struct berval cookie = BER_BVNULL;
2339
2340                 if ( ( ss->ss_flags & SS_CHANGED ) &&
2341                         ss->ss_ctxcsn && !BER_BVISNULL( &ss->ss_ctxcsn[0] )) {
2342                         slap_compose_sync_cookie( op, &cookie, ss->ss_ctxcsn,
2343                                 srs->sr_state.rid, slap_serverID ? slap_serverID : -1 );
2344
2345                         Debug( LDAP_DEBUG_SYNC, "syncprov_search_response: cookie=%s\n", cookie.bv_val, 0, 0 );
2346                 }
2347
2348                 /* Is this a regular refresh?
2349                  * Note: refresh never gets here if there were no changes
2350                  */
2351                 if ( !ss->ss_so ) {
2352                         rs->sr_ctrls = op->o_tmpalloc( sizeof(LDAPControl *)*2,
2353                                 op->o_tmpmemctx );
2354                         rs->sr_ctrls[1] = NULL;
2355                         rs->sr_err = syncprov_done_ctrl( op, rs, rs->sr_ctrls,
2356                                 0, 1, &cookie, ( ss->ss_flags & SS_PRESENT ) ?  LDAP_SYNC_REFRESH_PRESENTS :
2357                                         LDAP_SYNC_REFRESH_DELETES );
2358                         op->o_tmpfree( cookie.bv_val, op->o_tmpmemctx );
2359                 } else {
2360                 /* It's RefreshAndPersist, transition to Persist phase */
2361                         syncprov_sendinfo( op, rs, ( ss->ss_flags & SS_PRESENT ) ?
2362                                 LDAP_TAG_SYNC_REFRESH_PRESENT : LDAP_TAG_SYNC_REFRESH_DELETE,
2363                                 ( ss->ss_flags & SS_CHANGED ) ? &cookie : NULL,
2364                                 1, NULL, 0 );
2365                         if ( !BER_BVISNULL( &cookie ))
2366                                 op->o_tmpfree( cookie.bv_val, op->o_tmpmemctx );
2367
2368                         /* Detach this Op from frontend control */
2369                         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
2370
2371                         /* But not if this connection was closed along the way */
2372                         if ( op->o_abandon ) {
2373                                 ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
2374                                 /* syncprov_ab_cleanup will free this syncop */
2375                                 return SLAPD_ABANDON;
2376
2377                         } else {
2378                                 ldap_pvt_thread_mutex_lock( &ss->ss_so->s_mutex );
2379                                 /* Turn off the refreshing flag */
2380                                 ss->ss_so->s_flags ^= PS_IS_REFRESHING;
2381
2382                                 syncprov_detach_op( op, ss->ss_so, on );
2383
2384                                 ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
2385
2386                                 /* If there are queued responses, fire them off */
2387                                 if ( ss->ss_so->s_res )
2388                                         syncprov_qstart( ss->ss_so );
2389                                 ldap_pvt_thread_mutex_unlock( &ss->ss_so->s_mutex );
2390                         }
2391
2392                         return LDAP_SUCCESS;
2393                 }
2394         }
2395
2396         return SLAP_CB_CONTINUE;
2397 }
2398
2399 static int
2400 syncprov_op_search( Operation *op, SlapReply *rs )
2401 {
2402         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
2403         syncprov_info_t         *si = (syncprov_info_t *)on->on_bi.bi_private;
2404         slap_callback   *cb;
2405         int gotstate = 0, changed = 0, do_present = 0;
2406         syncops *sop = NULL;
2407         searchstate *ss;
2408         sync_control *srs;
2409         BerVarray ctxcsn;
2410         int i, *sids, numcsns;
2411         struct berval mincsn;
2412         int dirty = 0;
2413
2414         if ( !(op->o_sync_mode & SLAP_SYNC_REFRESH) ) return SLAP_CB_CONTINUE;
2415
2416         if ( op->ors_deref & LDAP_DEREF_SEARCHING ) {
2417                 send_ldap_error( op, rs, LDAP_PROTOCOL_ERROR, "illegal value for derefAliases" );
2418                 return rs->sr_err;
2419         }
2420
2421         srs = op->o_controls[slap_cids.sc_LDAPsync];
2422
2423         /* If this is a persistent search, set it up right away */
2424         if ( op->o_sync_mode & SLAP_SYNC_PERSIST ) {
2425                 syncops so = {0};
2426                 fbase_cookie fc;
2427                 opcookie opc;
2428                 slap_callback sc;
2429
2430                 fc.fss = &so;
2431                 fc.fbase = 0;
2432                 so.s_eid = NOID;
2433                 so.s_op = op;
2434                 so.s_flags = PS_IS_REFRESHING | PS_FIND_BASE;
2435                 /* syncprov_findbase expects to be called as a callback... */
2436                 sc.sc_private = &opc;
2437                 opc.son = on;
2438                 ldap_pvt_thread_mutex_init( &so.s_mutex );
2439                 cb = op->o_callback;
2440                 op->o_callback = &sc;
2441                 rs->sr_err = syncprov_findbase( op, &fc );
2442                 op->o_callback = cb;
2443                 ldap_pvt_thread_mutex_destroy( &so.s_mutex );
2444
2445                 if ( rs->sr_err != LDAP_SUCCESS ) {
2446                         send_ldap_result( op, rs );
2447                         return rs->sr_err;
2448                 }
2449                 sop = ch_malloc( sizeof( syncops ));
2450                 *sop = so;
2451                 ldap_pvt_thread_mutex_init( &sop->s_mutex );
2452                 sop->s_rid = srs->sr_state.rid;
2453                 sop->s_sid = srs->sr_state.sid;
2454                 sop->s_inuse = 1;
2455
2456                 ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
2457                 while ( si->si_active ) {
2458                         /* Wait for active mods to finish before proceeding, as they
2459                          * may already have inspected the si_ops list looking for
2460                          * consumers to replicate the change to.  Using the log
2461                          * doesn't help, as we may finish playing it before the
2462                          * active mods gets added to it.
2463                          */
2464                         ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
2465                         if ( slapd_shutdown )
2466                                 return SLAPD_ABANDON;
2467                         if ( !ldap_pvt_thread_pool_pausecheck( &connection_pool ))
2468                                 ldap_pvt_thread_yield();
2469                         ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
2470                 }
2471                 sop->s_next = si->si_ops;
2472                 si->si_ops = sop;
2473                 ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
2474         }
2475
2476         /* snapshot the ctxcsn */
2477         ldap_pvt_thread_rdwr_rlock( &si->si_csn_rwlock );
2478         numcsns = si->si_numcsns;
2479         if ( numcsns ) {
2480                 ber_bvarray_dup_x( &ctxcsn, si->si_ctxcsn, op->o_tmpmemctx );
2481                 sids = op->o_tmpalloc( numcsns * sizeof(int), op->o_tmpmemctx );
2482                 for ( i=0; i<numcsns; i++ )
2483                         sids[i] = si->si_sids[i];
2484         } else {
2485                 ctxcsn = NULL;
2486                 sids = NULL;
2487         }
2488         dirty = si->si_dirty;
2489         ldap_pvt_thread_rdwr_runlock( &si->si_csn_rwlock );
2490
2491         /* If we have a cookie, handle the PRESENT lookups */
2492         if ( srs->sr_state.ctxcsn ) {
2493                 sessionlog *sl;
2494                 int i, j;
2495
2496                 /* If we don't have any CSN of our own yet, pretend nothing
2497                  * has changed.
2498                  */
2499                 if ( !numcsns )
2500                         goto no_change;
2501
2502                 if ( !si->si_nopres )
2503                         do_present = SS_PRESENT;
2504
2505                 /* If there are SIDs we don't recognize in the cookie, drop them */
2506                 for (i=0; i<srs->sr_state.numcsns; ) {
2507                         for (j=0; j<numcsns; j++) {
2508                                 if ( srs->sr_state.sids[i] == sids[j] ) {
2509                                         break;
2510                                 }
2511                         }
2512                         /* not found */
2513                         if ( j == numcsns ) {
2514                                 struct berval tmp = srs->sr_state.ctxcsn[i];
2515                                 j = srs->sr_state.numcsns - 1;
2516                                 srs->sr_state.ctxcsn[i] = srs->sr_state.ctxcsn[j];
2517                                 tmp.bv_len = 0;
2518                                 srs->sr_state.ctxcsn[j] = tmp;
2519                                 srs->sr_state.numcsns = j;
2520                                 srs->sr_state.sids[i] = srs->sr_state.sids[j];
2521                                 continue;
2522                         }
2523                         i++;
2524                 }
2525
2526                 /* Find the smallest CSN */
2527                 mincsn = srs->sr_state.ctxcsn[0];
2528                 for ( i=1; i<srs->sr_state.numcsns; i++ ) {
2529                         if ( ber_bvcmp( &mincsn, &srs->sr_state.ctxcsn[i] ) > 0 )
2530                                 mincsn = srs->sr_state.ctxcsn[i];
2531                 }
2532
2533                 /* If nothing has changed, shortcut it */
2534                 if ( srs->sr_state.numcsns == numcsns ) {
2535                         int i, j, newer;
2536                         for ( i=0; i<srs->sr_state.numcsns; i++ ) {
2537                                 for ( j=0; j<numcsns; j++ ) {
2538                                         if ( srs->sr_state.sids[i] != sids[j] )
2539                                                 continue;
2540                                         newer = ber_bvcmp( &srs->sr_state.ctxcsn[i], &ctxcsn[j] );
2541                                         /* If our state is newer, tell consumer about changes */
2542                                         if ( newer < 0 )
2543                                                 changed = SS_CHANGED;
2544                                         else if ( newer > 0 ) {
2545                                         /* our state is older, complain to consumer */
2546                                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
2547                                                 rs->sr_text = "consumer state is newer than provider!";
2548 bailout:
2549                                                 if ( sop ) {
2550                                                         syncops **sp = &si->si_ops;
2551
2552                                                         ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
2553                                                         while ( *sp != sop )
2554                                                                 sp = &(*sp)->s_next;
2555                                                         *sp = sop->s_next;
2556                                                         ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
2557                                                         ch_free( sop );
2558                                                 }
2559                                                 rs->sr_ctrls = NULL;
2560                                                 send_ldap_result( op, rs );
2561                                                 return rs->sr_err;
2562                                         }
2563                                         break;
2564                                 }
2565                                 if ( changed )
2566                                         break;
2567                         }
2568                         if ( !changed && !dirty ) {
2569                                 do_present = 0;
2570 no_change:              if ( !(op->o_sync_mode & SLAP_SYNC_PERSIST) ) {
2571                                         LDAPControl     *ctrls[2];
2572
2573                                         ctrls[0] = NULL;
2574                                         ctrls[1] = NULL;
2575                                         syncprov_done_ctrl( op, rs, ctrls, 0, 0,
2576                                                 NULL, LDAP_SYNC_REFRESH_DELETES );
2577                                         rs->sr_ctrls = ctrls;
2578                                         rs->sr_err = LDAP_SUCCESS;
2579                                         send_ldap_result( op, rs );
2580                                         rs->sr_ctrls = NULL;
2581                                         return rs->sr_err;
2582                                 }
2583                                 goto shortcut;
2584                         }
2585                 } else {
2586                         /* consumer doesn't have the right number of CSNs */
2587                         changed = SS_CHANGED;
2588                 }
2589                 /* Do we have a sessionlog for this search? */
2590                 sl=si->si_logs;
2591                 if ( sl ) {
2592                         ldap_pvt_thread_mutex_lock( &sl->sl_mutex );
2593                         /* Are there any log entries, and is the consumer state
2594                          * present in the session log?
2595                          */
2596                         if ( sl->sl_num > 0 && ber_bvcmp( &mincsn, &sl->sl_head->se_csn ) >= 0 ) {
2597                                 do_present = 0;
2598                                 /* mutex is unlocked in playlog */
2599                                 syncprov_playlog( op, rs, sl, srs, ctxcsn, numcsns, sids );
2600                         } else {
2601                                 ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
2602                         }
2603                 }
2604                 /* Is the CSN still present in the database? */
2605                 if ( syncprov_findcsn( op, FIND_CSN ) != LDAP_SUCCESS ) {
2606                         /* No, so a reload is required */
2607                         /* the 2.2 consumer doesn't send this hint */
2608                         if ( si->si_usehint && srs->sr_rhint == 0 ) {
2609                                 if ( ctxcsn )
2610                                         ber_bvarray_free_x( ctxcsn, op->o_tmpmemctx );
2611                                 if ( sids )
2612                                         op->o_tmpfree( sids, op->o_tmpmemctx );
2613                                 rs->sr_err = LDAP_SYNC_REFRESH_REQUIRED;
2614                                 rs->sr_text = "sync cookie is stale";
2615                                 goto bailout;
2616                         }
2617                         if ( srs->sr_state.ctxcsn ) {
2618                                 ber_bvarray_free_x( srs->sr_state.ctxcsn, op->o_tmpmemctx );
2619                                 srs->sr_state.ctxcsn = NULL;
2620                         }
2621                         if ( srs->sr_state.sids ) {
2622                                 slap_sl_free( srs->sr_state.sids, op->o_tmpmemctx );
2623                                 srs->sr_state.sids = NULL;
2624                         }
2625                         srs->sr_state.numcsns = 0;
2626                 } else {
2627                         gotstate = 1;
2628                         /* If changed and doing Present lookup, send Present UUIDs */
2629                         if ( do_present && syncprov_findcsn( op, FIND_PRESENT ) !=
2630                                 LDAP_SUCCESS ) {
2631                                 if ( ctxcsn )
2632                                         ber_bvarray_free_x( ctxcsn, op->o_tmpmemctx );
2633                                 if ( sids )
2634                                         op->o_tmpfree( sids, op->o_tmpmemctx );
2635                                 goto bailout;
2636                         }
2637                 }
2638         } else {
2639                 /* No consumer state, assume something has changed */
2640                 changed = SS_CHANGED;
2641         }
2642
2643 shortcut:
2644         /* Append CSN range to search filter, save original filter
2645          * for persistent search evaluation
2646          */
2647         if ( sop ) {
2648                 sop->s_filterstr= op->ors_filterstr;
2649         }
2650
2651         /* If something changed, find the changes */
2652         if ( gotstate && ( changed || dirty ) ) {
2653                 Filter *fand, *fava;
2654
2655                 fand = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
2656                 fand->f_choice = LDAP_FILTER_AND;
2657                 fand->f_next = NULL;
2658                 fava = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
2659                 fand->f_and = fava;
2660                 fava->f_choice = LDAP_FILTER_GE;
2661                 fava->f_ava = op->o_tmpalloc( sizeof(AttributeAssertion), op->o_tmpmemctx );
2662                 fava->f_ava->aa_desc = slap_schema.si_ad_entryCSN;
2663 #ifdef LDAP_COMP_MATCH
2664                 fava->f_ava->aa_cf = NULL;
2665 #endif
2666                 ber_dupbv_x( &fava->f_ava->aa_value, &mincsn, op->o_tmpmemctx );
2667                 fava->f_next = op->ors_filter;
2668                 if ( sop )
2669                         ldap_pvt_thread_mutex_lock( &sop->s_mutex );
2670                 op->ors_filter = fand;
2671                 filter2bv_x( op, op->ors_filter, &op->ors_filterstr );
2672                 if ( sop ) {
2673                         sop->s_flags |= PS_FIX_FILTER;
2674                         ldap_pvt_thread_mutex_unlock( &sop->s_mutex );
2675                 }
2676         }
2677
2678         /* Let our callback add needed info to returned entries */
2679         cb = op->o_tmpcalloc(1, sizeof(slap_callback)+sizeof(searchstate), op->o_tmpmemctx);
2680         ss = (searchstate *)(cb+1);
2681         ss->ss_on = on;
2682         ss->ss_so = sop;
2683         ss->ss_flags = do_present | changed;
2684         ss->ss_ctxcsn = ctxcsn;
2685         ss->ss_numcsns = numcsns;
2686         ss->ss_sids = sids;
2687         cb->sc_response = syncprov_search_response;
2688         cb->sc_cleanup = syncprov_search_cleanup;
2689         cb->sc_private = ss;
2690         cb->sc_next = op->o_callback;
2691         op->o_callback = cb;
2692
2693         /* If this is a persistent search and no changes were reported during
2694          * the refresh phase, just invoke the response callback to transition
2695          * us into persist phase
2696          */
2697         if ( !changed && !dirty ) {
2698                 rs->sr_err = LDAP_SUCCESS;
2699                 rs->sr_nentries = 0;
2700                 send_ldap_result( op, rs );
2701                 return rs->sr_err;
2702         }
2703         return SLAP_CB_CONTINUE;
2704 }
2705
2706 static int
2707 syncprov_operational(
2708         Operation *op,
2709         SlapReply *rs )
2710 {
2711         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
2712         syncprov_info_t         *si = (syncprov_info_t *)on->on_bi.bi_private;
2713
2714         /* This prevents generating unnecessarily; frontend will strip
2715          * any statically stored copy.
2716          */
2717         if ( op->o_sync != SLAP_CONTROL_NONE )
2718                 return SLAP_CB_CONTINUE;
2719
2720         if ( rs->sr_entry &&
2721                 dn_match( &rs->sr_entry->e_nname, &si->si_contextdn )) {
2722
2723                 if ( SLAP_OPATTRS( rs->sr_attr_flags ) ||
2724                         ad_inlist( slap_schema.si_ad_contextCSN, rs->sr_attrs )) {
2725                         Attribute *a, **ap = NULL;
2726
2727                         for ( a=rs->sr_entry->e_attrs; a; a=a->a_next ) {
2728                                 if ( a->a_desc == slap_schema.si_ad_contextCSN )
2729                                         break;
2730                         }
2731
2732                         ldap_pvt_thread_rdwr_rlock( &si->si_csn_rwlock );
2733                         if ( si->si_ctxcsn ) {
2734                                 if ( !a ) {
2735                                         for ( ap = &rs->sr_operational_attrs; *ap;
2736                                                 ap=&(*ap)->a_next );
2737
2738                                         a = attr_alloc( slap_schema.si_ad_contextCSN );
2739                                         *ap = a;
2740                                 }
2741
2742                                 if ( !ap ) {
2743                                         if ( !(rs->sr_flags & REP_ENTRY_MODIFIABLE) ) {
2744                                                 Entry *e = entry_dup( rs->sr_entry );
2745                                                 if ( rs->sr_flags & REP_ENTRY_MUSTRELEASE ) {
2746                                                         overlay_entry_release_ov( op, rs->sr_entry, 0, on );
2747                                                         rs->sr_flags ^= REP_ENTRY_MUSTRELEASE;
2748                                                 } else if ( rs->sr_flags & REP_ENTRY_MUSTBEFREED ) {
2749                                                         entry_free( rs->sr_entry );
2750                                                 }
2751                                                 rs->sr_entry = e;
2752                                                 rs->sr_flags |=
2753                                                         REP_ENTRY_MODIFIABLE|REP_ENTRY_MUSTBEFREED;
2754                                                 a = attr_find( rs->sr_entry->e_attrs,
2755                                                         slap_schema.si_ad_contextCSN );
2756                                         }
2757                                         if ( a->a_nvals != a->a_vals ) {
2758                                                 ber_bvarray_free( a->a_nvals );
2759                                         }
2760                                         a->a_nvals = NULL;
2761                                         ber_bvarray_free( a->a_vals );
2762                                         a->a_vals = NULL;
2763                                         a->a_numvals = 0;
2764                                 }
2765                                 attr_valadd( a, si->si_ctxcsn, si->si_ctxcsn, si->si_numcsns );
2766                         }
2767                         ldap_pvt_thread_rdwr_runlock( &si->si_csn_rwlock );
2768                 }
2769         }
2770         return SLAP_CB_CONTINUE;
2771 }
2772
2773 enum {
2774         SP_CHKPT = 1,
2775         SP_SESSL,
2776         SP_NOPRES,
2777         SP_USEHINT
2778 };
2779
2780 static ConfigDriver sp_cf_gen;
2781
2782 static ConfigTable spcfg[] = {
2783         { "syncprov-checkpoint", "ops> <minutes", 3, 3, 0, ARG_MAGIC|SP_CHKPT,
2784                 sp_cf_gen, "( OLcfgOvAt:1.1 NAME 'olcSpCheckpoint' "
2785                         "DESC 'ContextCSN checkpoint interval in ops and minutes' "
2786                         "SYNTAX OMsDirectoryString SINGLE-VALUE )", NULL, NULL },
2787         { "syncprov-sessionlog", "ops", 2, 2, 0, ARG_INT|ARG_MAGIC|SP_SESSL,
2788                 sp_cf_gen, "( OLcfgOvAt:1.2 NAME 'olcSpSessionlog' "
2789                         "DESC 'Session log size in ops' "
2790                         "SYNTAX OMsInteger SINGLE-VALUE )", NULL, NULL },
2791         { "syncprov-nopresent", NULL, 2, 2, 0, ARG_ON_OFF|ARG_MAGIC|SP_NOPRES,
2792                 sp_cf_gen, "( OLcfgOvAt:1.3 NAME 'olcSpNoPresent' "
2793                         "DESC 'Omit Present phase processing' "
2794                         "SYNTAX OMsBoolean SINGLE-VALUE )", NULL, NULL },
2795         { "syncprov-reloadhint", NULL, 2, 2, 0, ARG_ON_OFF|ARG_MAGIC|SP_USEHINT,
2796                 sp_cf_gen, "( OLcfgOvAt:1.4 NAME 'olcSpReloadHint' "
2797                         "DESC 'Observe Reload Hint in Request control' "
2798                         "SYNTAX OMsBoolean SINGLE-VALUE )", NULL, NULL },
2799         { NULL, NULL, 0, 0, 0, ARG_IGNORED }
2800 };
2801
2802 static ConfigOCs spocs[] = {
2803         { "( OLcfgOvOc:1.1 "
2804                 "NAME 'olcSyncProvConfig' "
2805                 "DESC 'SyncRepl Provider configuration' "
2806                 "SUP olcOverlayConfig "
2807                 "MAY ( olcSpCheckpoint "
2808                         "$ olcSpSessionlog "
2809                         "$ olcSpNoPresent "
2810                         "$ olcSpReloadHint "
2811                 ") )",
2812                         Cft_Overlay, spcfg },
2813         { NULL, 0, NULL }
2814 };
2815
2816 static int
2817 sp_cf_gen(ConfigArgs *c)
2818 {
2819         slap_overinst           *on = (slap_overinst *)c->bi;
2820         syncprov_info_t         *si = (syncprov_info_t *)on->on_bi.bi_private;
2821         int rc = 0;
2822
2823         if ( c->op == SLAP_CONFIG_EMIT ) {
2824                 switch ( c->type ) {
2825                 case SP_CHKPT:
2826                         if ( si->si_chkops || si->si_chktime ) {
2827                                 struct berval bv;
2828                                 /* we assume si_chktime is a multiple of 60
2829                                  * because the parsed value was originally
2830                                  * multiplied by 60 */
2831                                 bv.bv_len = snprintf( c->cr_msg, sizeof( c->cr_msg ),
2832                                         "%d %d", si->si_chkops, si->si_chktime/60 );
2833                                 if ( bv.bv_len >= sizeof( c->cr_msg ) ) {
2834                                         rc = 1;
2835                                 } else {
2836                                         bv.bv_val = c->cr_msg;
2837                                         value_add_one( &c->rvalue_vals, &bv );
2838                                 }
2839                         } else {
2840                                 rc = 1;
2841                         }
2842                         break;
2843                 case SP_SESSL:
2844                         if ( si->si_logs ) {
2845                                 c->value_int = si->si_logs->sl_size;
2846                         } else {
2847                                 rc = 1;
2848                         }
2849                         break;
2850                 case SP_NOPRES:
2851                         if ( si->si_nopres ) {
2852                                 c->value_int = 1;
2853                         } else {
2854                                 rc = 1;
2855                         }
2856                         break;
2857                 case SP_USEHINT:
2858                         if ( si->si_usehint ) {
2859                                 c->value_int = 1;
2860                         } else {
2861                                 rc = 1;
2862                         }
2863                         break;
2864                 }
2865                 return rc;
2866         } else if ( c->op == LDAP_MOD_DELETE ) {
2867                 switch ( c->type ) {
2868                 case SP_CHKPT:
2869                         si->si_chkops = 0;
2870                         si->si_chktime = 0;
2871                         break;
2872                 case SP_SESSL:
2873                         if ( si->si_logs )
2874                                 si->si_logs->sl_size = 0;
2875                         else
2876                                 rc = LDAP_NO_SUCH_ATTRIBUTE;
2877                         break;
2878                 case SP_NOPRES:
2879                         if ( si->si_nopres )
2880                                 si->si_nopres = 0;
2881                         else
2882                                 rc = LDAP_NO_SUCH_ATTRIBUTE;
2883                         break;
2884                 case SP_USEHINT:
2885                         if ( si->si_usehint )
2886                                 si->si_usehint = 0;
2887                         else
2888                                 rc = LDAP_NO_SUCH_ATTRIBUTE;
2889                         break;
2890                 }
2891                 return rc;
2892         }
2893         switch ( c->type ) {
2894         case SP_CHKPT:
2895                 if ( lutil_atoi( &si->si_chkops, c->argv[1] ) != 0 ) {
2896                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s unable to parse checkpoint ops # \"%s\"",
2897                                 c->argv[0], c->argv[1] );
2898                         Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
2899                                 "%s: %s\n", c->log, c->cr_msg, 0 );
2900                         return ARG_BAD_CONF;
2901                 }
2902                 if ( si->si_chkops <= 0 ) {
2903                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s invalid checkpoint ops # \"%d\"",
2904                                 c->argv[0], si->si_chkops );
2905                         Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
2906                                 "%s: %s\n", c->log, c->cr_msg, 0 );
2907                         return ARG_BAD_CONF;
2908                 }
2909                 if ( lutil_atoi( &si->si_chktime, c->argv[2] ) != 0 ) {
2910                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s unable to parse checkpoint time \"%s\"",
2911                                 c->argv[0], c->argv[1] );
2912                         Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
2913                                 "%s: %s\n", c->log, c->cr_msg, 0 );
2914                         return ARG_BAD_CONF;
2915                 }
2916                 if ( si->si_chktime <= 0 ) {
2917                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s invalid checkpoint time \"%d\"",
2918                                 c->argv[0], si->si_chkops );
2919                         Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
2920                                 "%s: %s\n", c->log, c->cr_msg, 0 );
2921                         return ARG_BAD_CONF;
2922                 }
2923                 si->si_chktime *= 60;
2924                 break;
2925         case SP_SESSL: {
2926                 sessionlog *sl;
2927                 int size = c->value_int;
2928
2929                 if ( size < 0 ) {
2930                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s size %d is negative",
2931                                 c->argv[0], size );
2932                         Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
2933                                 "%s: %s\n", c->log, c->cr_msg, 0 );
2934                         return ARG_BAD_CONF;
2935                 }
2936                 sl = si->si_logs;
2937                 if ( !sl ) {
2938                         sl = ch_malloc( sizeof( sessionlog ) );
2939                         sl->sl_num = 0;
2940                         sl->sl_head = sl->sl_tail = NULL;
2941                         ldap_pvt_thread_mutex_init( &sl->sl_mutex );
2942                         si->si_logs = sl;
2943                 }
2944                 sl->sl_size = size;
2945                 }
2946                 break;
2947         case SP_NOPRES:
2948                 si->si_nopres = c->value_int;
2949                 break;
2950         case SP_USEHINT:
2951                 si->si_usehint = c->value_int;
2952                 break;
2953         }
2954         return rc;
2955 }
2956
2957 /* ITS#3456 we cannot run this search on the main thread, must use a
2958  * child thread in order to insure we have a big enough stack.
2959  */
2960 static void *
2961 syncprov_db_otask(
2962         void *ptr
2963 )
2964 {
2965         syncprov_findcsn( ptr, FIND_MAXCSN );
2966         return NULL;
2967 }
2968
2969 /* Read any existing contextCSN from the underlying db.
2970  * Then search for any entries newer than that. If no value exists,
2971  * just generate it. Cache whatever result.
2972  */
2973 static int
2974 syncprov_db_open(
2975         BackendDB *be,
2976         ConfigReply *cr
2977 )
2978 {
2979         slap_overinst   *on = (slap_overinst *) be->bd_info;
2980         syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
2981
2982         Connection conn = { 0 };
2983         OperationBuffer opbuf;
2984         Operation *op;
2985         Entry *e = NULL;
2986         Attribute *a;
2987         int rc;
2988         void *thrctx = NULL;
2989
2990         if ( !SLAP_LASTMOD( be )) {
2991                 Debug( LDAP_DEBUG_ANY,
2992                         "syncprov_db_open: invalid config, lastmod must be enabled\n", 0, 0, 0 );
2993                 return -1;
2994         }
2995
2996         if ( slapMode & SLAP_TOOL_MODE ) {
2997                 return 0;
2998         }
2999
3000         rc = overlay_register_control( be, LDAP_CONTROL_SYNC );
3001         if ( rc ) {
3002                 return rc;
3003         }
3004
3005         thrctx = ldap_pvt_thread_pool_context();
3006         connection_fake_init2( &conn, &opbuf, thrctx, 0 );
3007         op = &opbuf.ob_op;
3008         op->o_bd = be;
3009         op->o_dn = be->be_rootdn;
3010         op->o_ndn = be->be_rootndn;
3011
3012         if ( SLAP_SYNC_SUBENTRY( be )) {
3013                 build_new_dn( &si->si_contextdn, be->be_nsuffix,
3014                         (struct berval *)&slap_ldapsync_cn_bv, NULL );
3015         } else {
3016                 si->si_contextdn = be->be_nsuffix[0];
3017         }
3018         rc = overlay_entry_get_ov( op, &si->si_contextdn, NULL,
3019                 slap_schema.si_ad_contextCSN, 0, &e, on );
3020
3021         if ( e ) {
3022                 ldap_pvt_thread_t tid;
3023
3024                 a = attr_find( e->e_attrs, slap_schema.si_ad_contextCSN );
3025                 if ( a ) {
3026                         ber_bvarray_dup_x( &si->si_ctxcsn, a->a_vals, NULL );
3027                         si->si_numcsns = a->a_numvals;
3028                         si->si_sids = slap_parse_csn_sids( si->si_ctxcsn, a->a_numvals, NULL );
3029                 }
3030                 overlay_entry_release_ov( op, e, 0, on );
3031                 if ( si->si_ctxcsn && !SLAP_DBCLEAN( be )) {
3032                         op->o_req_dn = be->be_suffix[0];
3033                         op->o_req_ndn = be->be_nsuffix[0];
3034                         op->ors_scope = LDAP_SCOPE_SUBTREE;
3035                         ldap_pvt_thread_create( &tid, 0, syncprov_db_otask, op );
3036                         ldap_pvt_thread_join( tid, NULL );
3037                 }
3038         }
3039
3040         /* Didn't find a contextCSN, should we generate one? */
3041         if ( !si->si_ctxcsn ) {
3042                 char csnbuf[ LDAP_PVT_CSNSTR_BUFSIZE ];
3043                 struct berval csn;
3044
3045                 if ( SLAP_SYNC_SHADOW( op->o_bd )) {
3046                 /* If we're also a consumer, then don't generate anything.
3047                  * Wait for our provider to send it to us, or for a local
3048                  * modify if we have multimaster.
3049                  */
3050                         goto out;
3051                 }
3052                 csn.bv_val = csnbuf;
3053                 csn.bv_len = sizeof( csnbuf );
3054                 slap_get_csn( op, &csn, 0 );
3055                 value_add_one( &si->si_ctxcsn, &csn );
3056                 si->si_numcsns = 1;
3057                 si->si_sids = ch_malloc( sizeof(int) );
3058                 si->si_sids[0] = slap_serverID;
3059
3060                 /* make sure we do a checkpoint on close */
3061                 si->si_numops++;
3062         }
3063
3064 out:
3065         op->o_bd->bd_info = (BackendInfo *)on;
3066         return 0;
3067 }
3068
3069 /* Write the current contextCSN into the underlying db.
3070  */
3071 static int
3072 syncprov_db_close(
3073         BackendDB *be,
3074         ConfigReply *cr
3075 )
3076 {
3077     slap_overinst   *on = (slap_overinst *) be->bd_info;
3078     syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
3079
3080         if ( slapMode & SLAP_TOOL_MODE ) {
3081                 return 0;
3082         }
3083         if ( si->si_numops ) {
3084                 Connection conn = {0};
3085                 OperationBuffer opbuf;
3086                 Operation *op;
3087                 SlapReply rs = {REP_RESULT};
3088                 void *thrctx;
3089
3090                 thrctx = ldap_pvt_thread_pool_context();
3091                 connection_fake_init2( &conn, &opbuf, thrctx, 0 );
3092                 op = &opbuf.ob_op;
3093                 op->o_bd = be;
3094                 op->o_dn = be->be_rootdn;
3095                 op->o_ndn = be->be_rootndn;
3096                 syncprov_checkpoint( op, &rs, on );
3097         }
3098
3099     return 0;
3100 }
3101
3102 static int
3103 syncprov_db_init(
3104         BackendDB *be,
3105         ConfigReply *cr
3106 )
3107 {
3108         slap_overinst   *on = (slap_overinst *)be->bd_info;
3109         syncprov_info_t *si;
3110
3111         if ( SLAP_ISGLOBALOVERLAY( be ) ) {
3112                 Debug( LDAP_DEBUG_ANY,
3113                         "syncprov must be instantiated within a database.\n",
3114                         0, 0, 0 );
3115                 return 1;
3116         }
3117
3118         si = ch_calloc(1, sizeof(syncprov_info_t));
3119         on->on_bi.bi_private = si;
3120         ldap_pvt_thread_rdwr_init( &si->si_csn_rwlock );
3121         ldap_pvt_thread_mutex_init( &si->si_ops_mutex );
3122         ldap_pvt_thread_mutex_init( &si->si_mods_mutex );
3123         ldap_pvt_thread_mutex_init( &si->si_resp_mutex );
3124
3125         csn_anlist[0].an_desc = slap_schema.si_ad_entryCSN;
3126         csn_anlist[0].an_name = slap_schema.si_ad_entryCSN->ad_cname;
3127         csn_anlist[1].an_desc = slap_schema.si_ad_entryUUID;
3128         csn_anlist[1].an_name = slap_schema.si_ad_entryUUID->ad_cname;
3129
3130         uuid_anlist[0].an_desc = slap_schema.si_ad_entryUUID;
3131         uuid_anlist[0].an_name = slap_schema.si_ad_entryUUID->ad_cname;
3132
3133         return 0;
3134 }
3135
3136 static int
3137 syncprov_db_destroy(
3138         BackendDB *be,
3139         ConfigReply *cr
3140 )
3141 {
3142         slap_overinst   *on = (slap_overinst *)be->bd_info;
3143         syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
3144
3145         if ( si ) {
3146                 if ( si->si_logs ) {
3147                         slog_entry *se = si->si_logs->sl_head;
3148
3149                         while ( se ) {
3150                                 slog_entry *se_next = se->se_next;
3151                                 ch_free( se );
3152                                 se = se_next;
3153                         }
3154
3155                         ldap_pvt_thread_mutex_destroy(&si->si_logs->sl_mutex);
3156                         ch_free( si->si_logs );
3157                 }
3158                 if ( si->si_ctxcsn )
3159                         ber_bvarray_free( si->si_ctxcsn );
3160                 if ( si->si_sids )
3161                         ch_free( si->si_sids );
3162                 ldap_pvt_thread_mutex_destroy( &si->si_resp_mutex );
3163                 ldap_pvt_thread_mutex_destroy( &si->si_mods_mutex );
3164                 ldap_pvt_thread_mutex_destroy( &si->si_ops_mutex );
3165                 ldap_pvt_thread_rdwr_destroy( &si->si_csn_rwlock );
3166                 ch_free( si );
3167         }
3168
3169         return 0;
3170 }
3171
3172 static int syncprov_parseCtrl (
3173         Operation *op,
3174         SlapReply *rs,
3175         LDAPControl *ctrl )
3176 {
3177         ber_tag_t tag;
3178         BerElementBuffer berbuf;
3179         BerElement *ber = (BerElement *)&berbuf;
3180         ber_int_t mode;
3181         ber_len_t len;
3182         struct berval cookie = BER_BVNULL;
3183         sync_control *sr;
3184         int rhint = 0;
3185
3186         if ( op->o_sync != SLAP_CONTROL_NONE ) {
3187                 rs->sr_text = "Sync control specified multiple times";
3188                 return LDAP_PROTOCOL_ERROR;
3189         }
3190
3191         if ( op->o_pagedresults != SLAP_CONTROL_NONE ) {
3192                 rs->sr_text = "Sync control specified with pagedResults control";
3193                 return LDAP_PROTOCOL_ERROR;
3194         }
3195
3196         if ( BER_BVISNULL( &ctrl->ldctl_value ) ) {
3197                 rs->sr_text = "Sync control value is absent";
3198                 return LDAP_PROTOCOL_ERROR;
3199         }
3200
3201         if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
3202                 rs->sr_text = "Sync control value is empty";
3203                 return LDAP_PROTOCOL_ERROR;
3204         }
3205
3206         /* Parse the control value
3207          *      syncRequestValue ::= SEQUENCE {
3208          *              mode   ENUMERATED {
3209          *                      -- 0 unused
3210          *                      refreshOnly             (1),
3211          *                      -- 2 reserved
3212          *                      refreshAndPersist       (3)
3213          *              },
3214          *              cookie  syncCookie OPTIONAL
3215          *      }
3216          */
3217
3218         ber_init2( ber, &ctrl->ldctl_value, 0 );
3219
3220         if ( (tag = ber_scanf( ber, "{i" /*}*/, &mode )) == LBER_ERROR ) {
3221                 rs->sr_text = "Sync control : mode decoding error";
3222                 return LDAP_PROTOCOL_ERROR;
3223         }
3224
3225         switch( mode ) {
3226         case LDAP_SYNC_REFRESH_ONLY:
3227                 mode = SLAP_SYNC_REFRESH;
3228                 break;
3229         case LDAP_SYNC_REFRESH_AND_PERSIST:
3230                 mode = SLAP_SYNC_REFRESH_AND_PERSIST;
3231                 break;
3232         default:
3233                 rs->sr_text = "Sync control : unknown update mode";
3234                 return LDAP_PROTOCOL_ERROR;
3235         }
3236
3237         tag = ber_peek_tag( ber, &len );
3238
3239         if ( tag == LDAP_TAG_SYNC_COOKIE ) {
3240                 if (( ber_scanf( ber, /*{*/ "m", &cookie )) == LBER_ERROR ) {
3241                         rs->sr_text = "Sync control : cookie decoding error";
3242                         return LDAP_PROTOCOL_ERROR;
3243                 }
3244                 tag = ber_peek_tag( ber, &len );
3245         }
3246         if ( tag == LDAP_TAG_RELOAD_HINT ) {
3247                 if (( ber_scanf( ber, /*{*/ "b", &rhint )) == LBER_ERROR ) {
3248                         rs->sr_text = "Sync control : rhint decoding error";
3249                         return LDAP_PROTOCOL_ERROR;
3250                 }
3251         }
3252         if (( ber_scanf( ber, /*{*/ "}")) == LBER_ERROR ) {
3253                         rs->sr_text = "Sync control : decoding error";
3254                         return LDAP_PROTOCOL_ERROR;
3255         }
3256         sr = op->o_tmpcalloc( 1, sizeof(struct sync_control), op->o_tmpmemctx );
3257         sr->sr_rhint = rhint;
3258         if (!BER_BVISNULL(&cookie)) {
3259                 ber_dupbv_x( &sr->sr_state.octet_str, &cookie, op->o_tmpmemctx );
3260                 /* If parse fails, pretend no cookie was sent */
3261                 if ( slap_parse_sync_cookie( &sr->sr_state, op->o_tmpmemctx ) ||
3262                         sr->sr_state.rid == -1 ) {
3263                         if ( sr->sr_state.ctxcsn ) {
3264                                 ber_bvarray_free_x( sr->sr_state.ctxcsn, op->o_tmpmemctx );
3265                                 sr->sr_state.ctxcsn = NULL;
3266                         }
3267                         sr->sr_state.numcsns = 0;
3268                 }
3269         }
3270
3271         op->o_controls[slap_cids.sc_LDAPsync] = sr;
3272
3273         op->o_sync = ctrl->ldctl_iscritical
3274                 ? SLAP_CONTROL_CRITICAL
3275                 : SLAP_CONTROL_NONCRITICAL;
3276
3277         op->o_sync_mode |= mode;        /* o_sync_mode shares o_sync */
3278
3279         return LDAP_SUCCESS;
3280 }
3281
3282 /* This overlay is set up for dynamic loading via moduleload. For static
3283  * configuration, you'll need to arrange for the slap_overinst to be
3284  * initialized and registered by some other function inside slapd.
3285  */
3286
3287 static slap_overinst            syncprov;
3288
3289 int
3290 syncprov_initialize()
3291 {
3292         int rc;
3293
3294         rc = register_supported_control( LDAP_CONTROL_SYNC,
3295                 SLAP_CTRL_SEARCH, NULL,
3296                 syncprov_parseCtrl, &slap_cids.sc_LDAPsync );
3297         if ( rc != LDAP_SUCCESS ) {
3298                 Debug( LDAP_DEBUG_ANY,
3299                         "syncprov_init: Failed to register control %d\n", rc, 0, 0 );
3300                 return rc;
3301         }
3302
3303         syncprov.on_bi.bi_type = "syncprov";
3304         syncprov.on_bi.bi_db_init = syncprov_db_init;
3305         syncprov.on_bi.bi_db_destroy = syncprov_db_destroy;
3306         syncprov.on_bi.bi_db_open = syncprov_db_open;
3307         syncprov.on_bi.bi_db_close = syncprov_db_close;
3308
3309         syncprov.on_bi.bi_op_abandon = syncprov_op_abandon;
3310         syncprov.on_bi.bi_op_cancel = syncprov_op_abandon;
3311
3312         syncprov.on_bi.bi_op_add = syncprov_op_mod;
3313         syncprov.on_bi.bi_op_compare = syncprov_op_compare;
3314         syncprov.on_bi.bi_op_delete = syncprov_op_mod;
3315         syncprov.on_bi.bi_op_modify = syncprov_op_mod;
3316         syncprov.on_bi.bi_op_modrdn = syncprov_op_mod;
3317         syncprov.on_bi.bi_op_search = syncprov_op_search;
3318         syncprov.on_bi.bi_extended = syncprov_op_extended;
3319         syncprov.on_bi.bi_operational = syncprov_operational;
3320
3321         syncprov.on_bi.bi_cf_ocs = spocs;
3322
3323         generic_filter.f_desc = slap_schema.si_ad_objectClass;
3324
3325         rc = config_register_schema( spcfg, spocs );
3326         if ( rc ) return rc;
3327
3328         return overlay_register( &syncprov );
3329 }
3330
3331 #if SLAPD_OVER_SYNCPROV == SLAPD_MOD_DYNAMIC
3332 int
3333 init_module( int argc, char *argv[] )
3334 {
3335         return syncprov_initialize();
3336 }
3337 #endif /* SLAPD_OVER_SYNCPROV == SLAPD_MOD_DYNAMIC */
3338
3339 #endif /* defined(SLAPD_OVER_SYNCPROV) */