git.sur5r.net Git - openldap/blob - servers/slapd/overlays/syncprov.c

   1 /* $OpenLDAP$ */
   2 /* syncprov.c - syncrepl provider */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 2004-2005 The OpenLDAP Foundation.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted only as authorized by the OpenLDAP
  10  * Public License.
  11  *
  12  * A copy of this license is available in the file LICENSE in the
  13  * top-level directory of the distribution or, alternatively, at
  14  * <http://www.OpenLDAP.org/license.html>.
  15  */
  16 /* ACKNOWLEDGEMENTS:
  17  * This work was initially developed by Howard Chu for inclusion in
  18  * OpenLDAP Software.
  19  */
  20
  21 #include "portable.h"
  22
  23 #ifdef SLAPD_OVER_SYNCPROV
  24
  25 #include <ac/string.h>
  26 #include "lutil.h"
  27 #include "slap.h"
  28
  29 /* A modify request on a particular entry */
  30 typedef struct modinst {
  31         struct modinst *mi_next;
  32         Operation *mi_op;
  33 } modinst;
  34
  35 typedef struct modtarget {
  36         struct modinst *mt_mods;
  37         struct modinst *mt_tail;
  38         Operation *mt_op;
  39         ldap_pvt_thread_mutex_t mt_mutex;
  40 } modtarget;
  41
  42 /* A queued result of a persistent search */
  43 typedef struct syncres {
  44         struct syncres *s_next;
  45         struct berval s_dn;
  46         struct berval s_ndn;
  47         struct berval s_uuid;
  48         struct berval s_csn;
  49         char s_mode;
  50         char s_isreference;
  51 } syncres;
  52
  53 /* Record of a persistent search */
  54 typedef struct syncops {
  55         struct syncops *s_next;
  56         struct berval   s_base;         /* ndn of search base */
  57         ID              s_eid;          /* entryID of search base */
  58         Operation       *s_op;          /* search op */
  59         int             s_sid;
  60         int             s_rid;
  61         struct berval s_filterstr;
  62         int             s_flags;        /* search status */
  63         int             s_inuse;        /* reference count */
  64         struct syncres *s_res;
  65         struct syncres *s_restail;
  66         ldap_pvt_thread_mutex_t s_mutex;
  67 } syncops;
  68
  69 /* A received sync control */
  70 typedef struct sync_control {
  71         struct sync_cookie sr_state;
  72         int sr_rhint;
  73 } sync_control;
  74
  75 #if 0 /* moved back to slap.h */
  76 #define o_sync  o_ctrlflag[slap_cids.sc_LDAPsync]
  77 #endif
  78 /* o_sync_mode uses data bits of o_sync */
  79 #define o_sync_mode     o_ctrlflag[slap_cids.sc_LDAPsync]
  80
  81 #define SLAP_SYNC_NONE                                  (LDAP_SYNC_NONE<<SLAP_CONTROL_SHIFT)
  82 #define SLAP_SYNC_REFRESH                               (LDAP_SYNC_REFRESH_ONLY<<SLAP_CONTROL_SHIFT)
  83 #define SLAP_SYNC_PERSIST                               (LDAP_SYNC_RESERVED<<SLAP_CONTROL_SHIFT)
  84 #define SLAP_SYNC_REFRESH_AND_PERSIST   (LDAP_SYNC_REFRESH_AND_PERSIST<<SLAP_CONTROL_SHIFT)
  85
  86 #define PS_IS_REFRESHING        0x01
  87 #define PS_IS_DETACHED          0x02
  88
  89 /* Record of which searches matched at premodify step */
  90 typedef struct syncmatches {
  91         struct syncmatches *sm_next;
  92         syncops *sm_op;
  93 } syncmatches;
  94
  95 /* Session log data */
  96 typedef struct slog_entry {
  97         struct slog_entry *se_next;
  98         struct berval se_uuid;
  99         struct berval se_csn;
 100         ber_tag_t       se_tag;
 101 } slog_entry;
 102
 103 typedef struct sessionlog {
 104         struct sessionlog *sl_next;
 105         int             sl_sid;
 106         struct berval   sl_mincsn;
 107         int             sl_num;
 108         int             sl_size;
 109         slog_entry *sl_head;
 110         slog_entry *sl_tail;
 111         ldap_pvt_thread_mutex_t sl_mutex;
 112 } sessionlog;
 113
 114 /* The main state for this overlay */
 115 typedef struct syncprov_info_t {
 116         syncops         *si_ops;
 117         struct berval   si_ctxcsn;      /* ldapsync context */
 118         int             si_chkops;      /* checkpointing info */
 119         int             si_chktime;
 120         int             si_numops;      /* number of ops since last checkpoint */
 121         time_t  si_chklast;     /* time of last checkpoint */
 122         Avlnode *si_mods;       /* entries being modified */
 123         sessionlog      *si_logs;
 124         ldap_pvt_thread_mutex_t si_csn_mutex;
 125         ldap_pvt_thread_mutex_t si_ops_mutex;
 126         ldap_pvt_thread_mutex_t si_mods_mutex;
 127         char            si_ctxcsnbuf[LDAP_LUTIL_CSNSTR_BUFSIZE];
 128 } syncprov_info_t;
 129
 130 typedef struct opcookie {
 131         slap_overinst *son;
 132         syncmatches *smatches;
 133         struct berval sdn;      /* DN of entry, for deletes */
 134         struct berval sndn;
 135         struct berval suuid;    /* UUID of entry */
 136         struct berval sctxcsn;
 137         int sreference; /* Is the entry a reference? */
 138 } opcookie;
 139
 140 typedef struct fbase_cookie {
 141         struct berval *fdn;     /* DN of a modified entry, for scope testing */
 142         syncops *fss;   /* persistent search we're testing against */
 143         int fbase;      /* if TRUE we found the search base and it's still valid */
 144         int fscope;     /* if TRUE then fdn is within the psearch scope */
 145 } fbase_cookie;
 146
 147 static AttributeName csn_anlist[2];
 148 static AttributeName uuid_anlist[2];
 149
 150 /* Build a LDAPsync intermediate state control */
 151 static int
 152 syncprov_state_ctrl(
 153         Operation       *op,
 154         SlapReply       *rs,
 155         Entry           *e,
 156         int             entry_sync_state,
 157         LDAPControl     **ctrls,
 158         int             num_ctrls,
 159         int             send_cookie,
 160         struct berval   *cookie )
 161 {
 162         Attribute* a;
 163         int ret;
 164         int res;
 165         const char *text = NULL;
 166
 167         BerElementBuffer berbuf;
 168         BerElement *ber = (BerElement *)&berbuf;
 169
 170         struct berval   entryuuid_bv = BER_BVNULL;
 171
 172         ber_init2( ber, 0, LBER_USE_DER );
 173         ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
 174
 175         ctrls[num_ctrls] = op->o_tmpalloc( sizeof ( LDAPControl ), op->o_tmpmemctx );
 176
 177         for ( a = e->e_attrs; a != NULL; a = a->a_next ) {
 178                 AttributeDescription *desc = a->a_desc;
 179                 if ( desc == slap_schema.si_ad_entryUUID ) {
 180                         entryuuid_bv = a->a_nvals[0];
 181                         break;
 182                 }
 183         }
 184
 185         if ( send_cookie && cookie ) {
 186                 ber_printf( ber, "{eOON}",
 187                         entry_sync_state, &entryuuid_bv, cookie );
 188         } else {
 189                 ber_printf( ber, "{eON}",
 190                         entry_sync_state, &entryuuid_bv );
 191         }
 192
 193         ctrls[num_ctrls]->ldctl_oid = LDAP_CONTROL_SYNC_STATE;
 194         ctrls[num_ctrls]->ldctl_iscritical = (op->o_sync == SLAP_CONTROL_CRITICAL);
 195         ret = ber_flatten2( ber, &ctrls[num_ctrls]->ldctl_value, 1 );
 196
 197         ber_free_buf( ber );
 198
 199         if ( ret < 0 ) {
 200                 Debug( LDAP_DEBUG_TRACE,
 201                         "slap_build_sync_ctrl: ber_flatten2 failed\n",
 202                         0, 0, 0 );
 203                 send_ldap_error( op, rs, LDAP_OTHER, "internal error" );
 204                 return ret;
 205         }
 206
 207         return LDAP_SUCCESS;
 208 }
 209
 210 /* Build a LDAPsync final state control */
 211 static int
 212 syncprov_done_ctrl(
 213         Operation       *op,
 214         SlapReply       *rs,
 215         LDAPControl     **ctrls,
 216         int                     num_ctrls,
 217         int                     send_cookie,
 218         struct berval *cookie,
 219         int                     refreshDeletes )
 220 {
 221         int ret;
 222         BerElementBuffer berbuf;
 223         BerElement *ber = (BerElement *)&berbuf;
 224
 225         ber_init2( ber, NULL, LBER_USE_DER );
 226         ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
 227
 228         ctrls[num_ctrls] = op->o_tmpalloc( sizeof ( LDAPControl ), op->o_tmpmemctx );
 229
 230         ber_printf( ber, "{" );
 231         if ( send_cookie && cookie ) {
 232                 ber_printf( ber, "O", cookie );
 233         }
 234         if ( refreshDeletes == LDAP_SYNC_REFRESH_DELETES ) {
 235                 ber_printf( ber, "b", refreshDeletes );
 236         }
 237         ber_printf( ber, "N}" );
 238
 239         ctrls[num_ctrls]->ldctl_oid = LDAP_CONTROL_SYNC_DONE;
 240         ctrls[num_ctrls]->ldctl_iscritical = (op->o_sync == SLAP_CONTROL_CRITICAL);
 241         ret = ber_flatten2( ber, &ctrls[num_ctrls]->ldctl_value, 1 );
 242
 243         ber_free_buf( ber );
 244
 245         if ( ret < 0 ) {
 246                 Debug( LDAP_DEBUG_TRACE,
 247                         "syncprov_done_ctrl: ber_flatten2 failed\n",
 248                         0, 0, 0 );
 249                 send_ldap_error( op, rs, LDAP_OTHER, "internal error" );
 250                 return ret;
 251         }
 252
 253         return LDAP_SUCCESS;
 254 }
 255
 256 #if 0
 257 /* Generate state based on session log - not implemented yet */
 258 static int
 259 syncprov_state_ctrl_from_slog(
 260         Operation       *op,
 261         SlapReply       *rs,
 262         struct slog_entry *slog_e,
 263         int                     entry_sync_state,
 264         LDAPControl     **ctrls,
 265         int                     num_ctrls,
 266         int                     send_cookie,
 267         struct berval   *cookie)
 268 {
 269         Attribute* a;
 270         int ret;
 271         int res;
 272         const char *text = NULL;
 273
 274         BerElementBuffer berbuf;
 275         BerElement *ber = (BerElement *)&berbuf;
 276
 277         struct berval entryuuid_bv      = BER_BVNULL;
 278
 279         ber_init2( ber, NULL, LBER_USE_DER );
 280         ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
 281
 282         ctrls[num_ctrls] = ch_malloc ( sizeof ( LDAPControl ) );
 283
 284         entryuuid_bv = slog_e->sl_uuid;
 285
 286         if ( send_cookie && cookie ) {
 287                 ber_printf( ber, "{eOON}",
 288                         entry_sync_state, &entryuuid_bv, cookie );
 289         } else {
 290                 ber_printf( ber, "{eON}",
 291                         entry_sync_state, &entryuuid_bv );
 292         }
 293
 294         ctrls[num_ctrls]->ldctl_oid = LDAP_CONTROL_SYNC_STATE;
 295         ctrls[num_ctrls]->ldctl_iscritical = (op->o_sync == SLAP_CONTROL_CRITICAL);
 296         ret = ber_flatten2( ber, &ctrls[num_ctrls]->ldctl_value, 1 );
 297
 298         ber_free_buf( ber );
 299
 300         if ( ret < 0 ) {
 301                 Debug( LDAP_DEBUG_TRACE,
 302                         "slap_build_sync_ctrl: ber_flatten2 failed\n",
 303                         0, 0, 0 );
 304                 send_ldap_error( op, rs, LDAP_OTHER, "internal error" );
 305                 return ret;
 306         }
 307
 308         return LDAP_SUCCESS;
 309 }
 310 #endif
 311
 312 static int
 313 syncprov_sendinfo(
 314         Operation       *op,
 315         SlapReply       *rs,
 316         int                     type,
 317         struct berval *cookie,
 318         int                     refreshDone,
 319         BerVarray       syncUUIDs,
 320         int                     refreshDeletes )
 321 {
 322         BerElementBuffer berbuf;
 323         BerElement *ber = (BerElement *)&berbuf;
 324         struct berval rspdata;
 325
 326         int ret;
 327
 328         ber_init2( ber, NULL, LBER_USE_DER );
 329         ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
 330
 331         if ( type ) {
 332                 switch ( type ) {
 333                 case LDAP_TAG_SYNC_NEW_COOKIE:
 334                         ber_printf( ber, "tO", type, cookie );
 335                         break;
 336                 case LDAP_TAG_SYNC_REFRESH_DELETE:
 337                 case LDAP_TAG_SYNC_REFRESH_PRESENT:
 338                         ber_printf( ber, "t{", type );
 339                         if ( cookie ) {
 340                                 ber_printf( ber, "O", cookie );
 341                         }
 342                         if ( refreshDone == 0 ) {
 343                                 ber_printf( ber, "b", refreshDone );
 344                         }
 345                         ber_printf( ber, "N}" );
 346                         break;
 347                 case LDAP_TAG_SYNC_ID_SET:
 348                         ber_printf( ber, "t{", type );
 349                         if ( cookie ) {
 350                                 ber_printf( ber, "O", cookie );
 351                         }
 352                         if ( refreshDeletes == 1 ) {
 353                                 ber_printf( ber, "b", refreshDeletes );
 354                         }
 355                         ber_printf( ber, "[W]", syncUUIDs );
 356                         ber_printf( ber, "N}" );
 357                         break;
 358                 default:
 359                         Debug( LDAP_DEBUG_TRACE,
 360                                 "syncprov_sendinfo: invalid syncinfo type (%d)\n",
 361                                 type, 0, 0 );
 362                         return LDAP_OTHER;
 363                 }
 364         }
 365
 366         ret = ber_flatten2( ber, &rspdata, 0 );
 367
 368         if ( ret < 0 ) {
 369                 Debug( LDAP_DEBUG_TRACE,
 370                         "syncprov_sendinfo: ber_flatten2 failed\n",
 371                         0, 0, 0 );
 372                 send_ldap_error( op, rs, LDAP_OTHER, "internal error" );
 373                 return ret;
 374         }
 375
 376         rs->sr_rspoid = LDAP_SYNC_INFO;
 377         rs->sr_rspdata = &rspdata;
 378         send_ldap_intermediate( op, rs );
 379         rs->sr_rspdata = NULL;
 380         ber_free_buf( ber );
 381
 382         return LDAP_SUCCESS;
 383 }
 384
 385 /* Find a modtarget in an AVL tree */
 386 static int
 387 sp_avl_cmp( const void *c1, const void *c2 )
 388 {
 389         const modtarget *m1, *m2;
 390         int rc;
 391
 392         m1 = c1; m2 = c2;
 393         rc = m1->mt_op->o_req_ndn.bv_len - m2->mt_op->o_req_ndn.bv_len;
 394
 395         if ( rc ) return rc;
 396         return ber_bvcmp( &m1->mt_op->o_req_ndn, &m2->mt_op->o_req_ndn );
 397 }
 398
 399 /* syncprov_findbase:
 400  *   finds the true DN of the base of a search (with alias dereferencing) and
 401  * checks to make sure the base entry doesn't get replaced with a different
 402  * entry (e.g., swapping trees via ModDN, or retargeting an alias). If a
 403  * change is detected, any persistent search on this base must be terminated /
 404  * reloaded.
 405  *   On the first call, we just save the DN and entryID. On subsequent calls
 406  * we compare the DN and entryID with the saved values.
 407  */
 408 static int
 409 findbase_cb( Operation *op, SlapReply *rs )
 410 {
 411         slap_callback *sc = op->o_callback;
 412
 413         if ( rs->sr_type == REP_SEARCH && rs->sr_err == LDAP_SUCCESS ) {
 414                 fbase_cookie *fc = sc->sc_private;
 415
 416                 /* If no entryID, we're looking for the first time.
 417                  * Just store whatever we got.
 418                  */
 419                 if ( fc->fss->s_eid == NOID ) {
 420                         fc->fbase = 1;
 421                         fc->fss->s_eid = rs->sr_entry->e_id;
 422                         ber_dupbv( &fc->fss->s_base, &rs->sr_entry->e_nname );
 423
 424                 } else if ( rs->sr_entry->e_id == fc->fss->s_eid &&
 425                         dn_match( &rs->sr_entry->e_nname, &fc->fss->s_base )) {
 426
 427                 /* OK, the DN is the same and the entryID is the same. Now
 428                  * see if the fdn resides in the scope.
 429                  */
 430                         fc->fbase = 1;
 431                         switch ( fc->fss->s_op->ors_scope ) {
 432                         case LDAP_SCOPE_BASE:
 433                                 fc->fscope = dn_match( fc->fdn, &rs->sr_entry->e_nname );
 434                                 break;
 435                         case LDAP_SCOPE_ONELEVEL: {
 436                                 struct berval pdn;
 437                                 dnParent( fc->fdn, &pdn );
 438                                 fc->fscope = dn_match( &pdn, &rs->sr_entry->e_nname );
 439                                 break; }
 440                         case LDAP_SCOPE_SUBTREE:
 441                                 fc->fscope = dnIsSuffix( fc->fdn, &rs->sr_entry->e_nname );
 442                                 break;
 443 #ifdef LDAP_SCOPE_SUBORDINATE
 444                         case LDAP_SCOPE_SUBORDINATE:
 445                                 fc->fscope = dnIsSuffix( fc->fdn, &rs->sr_entry->e_nname ) &&
 446                                         !dn_match( fc->fdn, &rs->sr_entry->e_nname );
 447                                 break;
 448 #endif
 449                         }
 450                 }
 451         }
 452         if ( rs->sr_err != LDAP_SUCCESS ) {
 453                 Debug( LDAP_DEBUG_ANY, "findbase failed! %d\n", rs->sr_err,0,0 );
 454         }
 455         return LDAP_SUCCESS;
 456 }
 457
 458 static int
 459 syncprov_findbase( Operation *op, fbase_cookie *fc )
 460 {
 461         opcookie *opc = op->o_callback->sc_private;
 462         slap_overinst *on = opc->son;
 463         syncprov_info_t         *si = on->on_bi.bi_private;
 464
 465         slap_callback cb = {0};
 466         Operation fop;
 467         SlapReply frs = { REP_RESULT };
 468         int rc;
 469
 470         fop = *op;
 471
 472         cb.sc_response = findbase_cb;
 473         cb.sc_private = fc;
 474
 475         fop.o_sync_mode &= SLAP_CONTROL_MASK;   /* turn off sync mode */
 476         fop.o_callback = &cb;
 477         fop.o_tag = LDAP_REQ_SEARCH;
 478         fop.ors_scope = LDAP_SCOPE_BASE;
 479         fop.ors_deref = fc->fss->s_op->ors_deref;
 480         fop.ors_limit = NULL;
 481         fop.ors_slimit = 1;
 482         fop.ors_tlimit = SLAP_NO_LIMIT;
 483         fop.ors_attrs = slap_anlist_no_attrs;
 484         fop.ors_attrsonly = 1;
 485         fop.ors_filter = fc->fss->s_op->ors_filter;
 486         fop.ors_filterstr = fc->fss->s_op->ors_filterstr;
 487
 488         fop.o_req_ndn = fc->fss->s_op->o_req_ndn;
 489
 490         fop.o_bd->bd_info = on->on_info->oi_orig;
 491         rc = fop.o_bd->be_search( &fop, &frs );
 492         fop.o_bd->bd_info = (BackendInfo *)on;
 493
 494         if ( fc->fbase ) return LDAP_SUCCESS;
 495
 496         /* If entryID has changed, then the base of this search has
 497          * changed. Invalidate the psearch.
 498          */
 499         return LDAP_NO_SUCH_OBJECT;
 500 }
 501
 502 /* syncprov_findcsn:
 503  *   This function has three different purposes, but they all use a search
 504  * that filters on entryCSN so they're combined here.
 505  * 1: at startup time, after a contextCSN has been read from the database,
 506  * we search for all entries with CSN >= contextCSN in case the contextCSN
 507  * was not checkpointed at the previous shutdown.
 508  *
 509  * 2: when the current contextCSN is known and we have a sync cookie, we search
 510  * for one entry with CSN <= the cookie CSN. (Used to search for =.) If an
 511  * entry is found, the cookie CSN is valid, otherwise it is stale.
 512  *
 513  * 3: during a refresh phase, we search for all entries with CSN <= the cookie
 514  * CSN, and generate Present records for them. We always collect this result
 515  * in SyncID sets, even if there's only one match.
 516  */
 517 #define FIND_MAXCSN     1
 518 #define FIND_CSN        2
 519 #define FIND_PRESENT    3
 520
 521 static int
 522 findmax_cb( Operation *op, SlapReply *rs )
 523 {
 524         if ( rs->sr_type == REP_SEARCH && rs->sr_err == LDAP_SUCCESS ) {
 525                 struct berval *maxcsn = op->o_callback->sc_private;
 526                 Attribute *a = attr_find( rs->sr_entry->e_attrs,
 527                         slap_schema.si_ad_entryCSN );
 528
 529                 if ( a && ber_bvcmp( &a->a_vals[0], maxcsn ) > 0 ) {
 530                         maxcsn->bv_len = a->a_vals[0].bv_len;
 531                         strcpy( maxcsn->bv_val, a->a_vals[0].bv_val );
 532                 }
 533         }
 534         return LDAP_SUCCESS;
 535 }
 536
 537 static int
 538 findcsn_cb( Operation *op, SlapReply *rs )
 539 {
 540         slap_callback *sc = op->o_callback;
 541
 542         if ( rs->sr_type == REP_SEARCH && rs->sr_err == LDAP_SUCCESS ) {
 543                 sc->sc_private = (void *)1;
 544         }
 545         return LDAP_SUCCESS;
 546 }
 547
 548 /* Build a list of entryUUIDs for sending in a SyncID set */
 549
 550 #define UUID_LEN        16
 551
 552 typedef struct fpres_cookie {
 553         int num;
 554         BerVarray uuids;
 555         char *last;
 556 } fpres_cookie;
 557
 558 static int
 559 findpres_cb( Operation *op, SlapReply *rs )
 560 {
 561         slap_callback *sc = op->o_callback;
 562         fpres_cookie *pc = sc->sc_private;
 563         Attribute *a;
 564         int ret = SLAP_CB_CONTINUE;
 565
 566         switch ( rs->sr_type ) {
 567         case REP_SEARCH:
 568                 a = attr_find( rs->sr_entry->e_attrs, slap_schema.si_ad_entryUUID );
 569                 if ( a ) {
 570                         pc->uuids[pc->num].bv_val = pc->last;
 571                         AC_MEMCPY( pc->uuids[pc->num].bv_val, a->a_nvals[0].bv_val,
 572                                 pc->uuids[pc->num].bv_len );
 573                         pc->num++;
 574                         pc->last = pc->uuids[pc->num].bv_val;
 575                         pc->uuids[pc->num].bv_val = NULL;
 576                 }
 577                 ret = LDAP_SUCCESS;
 578                 if ( pc->num != SLAP_SYNCUUID_SET_SIZE )
 579                         break;
 580                 /* FALLTHRU */
 581         case REP_RESULT:
 582                 ret = rs->sr_err;
 583                 if ( pc->num ) {
 584                         ret = syncprov_sendinfo( op, rs, LDAP_TAG_SYNC_ID_SET, NULL,
 585                                 0, pc->uuids, 0 );
 586                         pc->uuids[pc->num].bv_val = pc->last;
 587                         pc->num = 0;
 588                         pc->last = pc->uuids[0].bv_val;
 589                 }
 590                 break;
 591         default:
 592                 break;
 593         }
 594         return ret;
 595 }
 596
 597 static int
 598 syncprov_findcsn( Operation *op, int mode )
 599 {
 600         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
 601         syncprov_info_t         *si = on->on_bi.bi_private;
 602
 603         slap_callback cb = {0};
 604         Operation fop;
 605         SlapReply frs = { REP_RESULT };
 606         char buf[LDAP_LUTIL_CSNSTR_BUFSIZE + STRLENOF("(entryCSN<=)")];
 607         char cbuf[LDAP_LUTIL_CSNSTR_BUFSIZE];
 608         struct berval fbuf, maxcsn;
 609         Filter cf, af;
 610         AttributeAssertion eq;
 611         int i, rc = LDAP_SUCCESS;
 612         fpres_cookie pcookie;
 613         sync_control *srs;
 614
 615         if ( mode != FIND_MAXCSN ) {
 616                 srs = op->o_controls[slap_cids.sc_LDAPsync];
 617
 618                 if ( srs->sr_state.ctxcsn->bv_len >= LDAP_LUTIL_CSNSTR_BUFSIZE ) {
 619                         return LDAP_OTHER;
 620                 }
 621         }
 622
 623         fop = *op;
 624         fop.o_sync_mode &= SLAP_CONTROL_MASK;   /* turn off sync_mode */
 625
 626         fbuf.bv_val = buf;
 627         cf.f_ava = &eq;
 628         cf.f_av_desc = slap_schema.si_ad_entryCSN;
 629         cf.f_next = NULL;
 630
 631         fop.o_callback = &cb;
 632         fop.ors_limit = NULL;
 633         fop.ors_tlimit = SLAP_NO_LIMIT;
 634         fop.ors_filter = &cf;
 635         fop.ors_filterstr = fbuf;
 636
 637         switch( mode ) {
 638         case FIND_MAXCSN:
 639                 cf.f_choice = LDAP_FILTER_GE;
 640                 cf.f_av_value = si->si_ctxcsn;
 641                 fbuf.bv_len = sprintf( buf, "(entryCSN>=%s)",
 642                         cf.f_av_value.bv_val );
 643                 fop.ors_attrsonly = 0;
 644                 fop.ors_attrs = csn_anlist;
 645                 fop.ors_slimit = SLAP_NO_LIMIT;
 646                 cb.sc_private = &maxcsn;
 647                 cb.sc_response = findmax_cb;
 648                 strcpy( cbuf, si->si_ctxcsn.bv_val );
 649                 maxcsn.bv_val = cbuf;
 650                 maxcsn.bv_len = si->si_ctxcsn.bv_len;
 651                 break;
 652         case FIND_CSN:
 653                 cf.f_choice = LDAP_FILTER_LE;
 654                 cf.f_av_value = *srs->sr_state.ctxcsn;
 655                 fbuf.bv_len = sprintf( buf, "(entryCSN<=%s)",
 656                         cf.f_av_value.bv_val );
 657                 fop.ors_attrsonly = 1;
 658                 fop.ors_attrs = slap_anlist_no_attrs;
 659                 fop.ors_slimit = 1;
 660                 cb.sc_private = NULL;
 661                 cb.sc_response = findcsn_cb;
 662                 break;
 663         case FIND_PRESENT:
 664                 af.f_choice = LDAP_FILTER_AND;
 665                 af.f_next = NULL;
 666                 af.f_and = &cf;
 667                 cf.f_choice = LDAP_FILTER_LE;
 668                 cf.f_av_value = *srs->sr_state.ctxcsn;
 669                 cf.f_next = op->ors_filter;
 670                 fop.ors_filter = &af;
 671                 filter2bv_x( &fop, fop.ors_filter, &fop.ors_filterstr );
 672                 fop.ors_attrsonly = 0;
 673                 fop.ors_attrs = uuid_anlist;
 674                 fop.ors_slimit = SLAP_NO_LIMIT;
 675                 /* We want pure entries, not referrals */
 676                 fop.o_managedsait = SLAP_CONTROL_CRITICAL;
 677                 cb.sc_private = &pcookie;
 678                 cb.sc_response = findpres_cb;
 679                 pcookie.num = 0;
 680
 681                 /* preallocate storage for a full set */
 682                 pcookie.uuids = op->o_tmpalloc( (SLAP_SYNCUUID_SET_SIZE+1) *
 683                         sizeof(struct berval) + SLAP_SYNCUUID_SET_SIZE * UUID_LEN,
 684                         op->o_tmpmemctx );
 685                 pcookie.last = (char *)(pcookie.uuids + SLAP_SYNCUUID_SET_SIZE+1);
 686                 pcookie.uuids[0].bv_val = pcookie.last;
 687                 pcookie.uuids[0].bv_len = UUID_LEN;
 688                 for (i=1; i<SLAP_SYNCUUID_SET_SIZE; i++) {
 689                         pcookie.uuids[i].bv_val = pcookie.uuids[i-1].bv_val + UUID_LEN;
 690                         pcookie.uuids[i].bv_len = UUID_LEN;
 691                 }
 692                 break;
 693         }
 694
 695         fop.o_bd->bd_info = on->on_info->oi_orig;
 696         fop.o_bd->be_search( &fop, &frs );
 697         fop.o_bd->bd_info = (BackendInfo *)on;
 698
 699         switch( mode ) {
 700         case FIND_MAXCSN:
 701                 strcpy( si->si_ctxcsnbuf, maxcsn.bv_val );
 702                 si->si_ctxcsn.bv_len = maxcsn.bv_len;
 703                 break;
 704         case FIND_CSN:
 705                 /* If matching CSN was not found, invalidate the context. */
 706                 if ( !cb.sc_private ) rc = LDAP_NO_SUCH_OBJECT;
 707                 break;
 708         case FIND_PRESENT:
 709                 op->o_tmpfree( pcookie.uuids, op->o_tmpmemctx );
 710                 op->o_tmpfree( fop.ors_filterstr.bv_val, op->o_tmpmemctx );
 711                 break;
 712         }
 713
 714         return rc;
 715 }
 716
 717 /* Queue a persistent search response if still in Refresh stage */
 718 static int
 719 syncprov_qresp( opcookie *opc, syncops *so, int mode )
 720 {
 721         syncres *sr;
 722
 723         sr = ch_malloc(sizeof(syncres) + opc->suuid.bv_len + 1 +
 724                 opc->sdn.bv_len + 1 + opc->sndn.bv_len + 1 + opc->sctxcsn.bv_len + 1 );
 725         sr->s_next = NULL;
 726         sr->s_dn.bv_val = (char *)(sr + 1);
 727         sr->s_mode = mode;
 728         sr->s_isreference = opc->sreference;
 729         sr->s_ndn.bv_val = lutil_strcopy( sr->s_dn.bv_val, opc->sdn.bv_val );
 730         *(sr->s_ndn.bv_val++) = '\0';
 731         sr->s_uuid.bv_val = lutil_strcopy( sr->s_ndn.bv_val, opc->sndn.bv_val );
 732         *(sr->s_uuid.bv_val++) = '\0';
 733         sr->s_csn.bv_val = lutil_strcopy( sr->s_uuid.bv_val, opc->suuid.bv_val );
 734
 735         if ( !so->s_res ) {
 736                 so->s_res = sr;
 737         } else {
 738                 so->s_restail->s_next = sr;
 739         }
 740         so->s_restail = sr;
 741         ldap_pvt_thread_mutex_unlock( &so->s_mutex );
 742         return LDAP_SUCCESS;
 743 }
 744
 745 /* Send a persistent search response */
 746 static int
 747 syncprov_sendresp( Operation *op, opcookie *opc, syncops *so, Entry *e, int mode, int queue )
 748 {
 749         slap_overinst *on = opc->son;
 750         syncprov_info_t *si = on->on_bi.bi_private;
 751
 752         SlapReply rs = { REP_SEARCH };
 753         LDAPControl *ctrls[2];
 754         struct berval cookie;
 755         Entry e_uuid = {0};
 756         Attribute a_uuid = {0};
 757         Operation sop = *so->s_op;
 758         Opheader ohdr;
 759
 760         ohdr = *sop.o_hdr;
 761         sop.o_hdr = &ohdr;
 762         sop.o_tmpmemctx = op->o_tmpmemctx;
 763         sop.o_bd = op->o_bd;
 764         sop.o_controls = op->o_controls;
 765
 766         if ( queue && (so->s_flags & PS_IS_REFRESHING) ) {
 767                 ldap_pvt_thread_mutex_lock( &so->s_mutex );
 768                 if ( so->s_flags & PS_IS_REFRESHING )
 769                         return syncprov_qresp( opc, so, mode );
 770                 ldap_pvt_thread_mutex_unlock( &so->s_mutex );
 771         }
 772
 773         ctrls[1] = NULL;
 774         slap_compose_sync_cookie( op, &cookie, &opc->sctxcsn,
 775                 so->s_sid, so->s_rid );
 776
 777         e_uuid.e_attrs = &a_uuid;
 778         a_uuid.a_desc = slap_schema.si_ad_entryUUID;
 779         a_uuid.a_nvals = &opc->suuid;
 780         rs.sr_err = syncprov_state_ctrl( &sop, &rs, &e_uuid,
 781                 mode, ctrls, 0, 1, &cookie );
 782
 783         rs.sr_entry = e;
 784         rs.sr_ctrls = ctrls;
 785         switch( mode ) {
 786         case LDAP_SYNC_ADD:
 787                 if ( opc->sreference ) {
 788                         rs.sr_ref = get_entry_referrals( &sop, e );
 789                         send_search_reference( &sop, &rs );
 790                         ber_bvarray_free( rs.sr_ref );
 791                         break;
 792                 }
 793                 /* fallthru */
 794         case LDAP_SYNC_MODIFY:
 795                 rs.sr_attrs = sop.ors_attrs;
 796                 send_search_entry( &sop, &rs );
 797                 break;
 798         case LDAP_SYNC_DELETE:
 799                 e_uuid.e_attrs = NULL;
 800                 e_uuid.e_name = opc->sdn;
 801                 e_uuid.e_nname = opc->sndn;
 802                 rs.sr_entry = &e_uuid;
 803                 if ( opc->sreference ) {
 804                         struct berval bv = BER_BVNULL;
 805                         rs.sr_ref = &bv;
 806                         send_search_reference( &sop, &rs );
 807                 } else {
 808                         send_search_entry( &sop, &rs );
 809                 }
 810                 break;
 811         default:
 812                 assert(0);
 813         }
 814         op->o_tmpfree( rs.sr_ctrls[0], op->o_tmpmemctx );
 815         rs.sr_ctrls = NULL;
 816         return rs.sr_err;
 817 }
 818
 819 static void
 820 syncprov_free_syncop( syncops *so )
 821 {
 822         syncres *sr, *srnext;
 823         GroupAssertion *ga, *gnext;
 824
 825         ldap_pvt_thread_mutex_lock( &so->s_mutex );
 826         so->s_inuse--;
 827         if ( so->s_inuse > 0 ) {
 828                 ldap_pvt_thread_mutex_unlock( &so->s_mutex );
 829                 return;
 830         }
 831         ldap_pvt_thread_mutex_unlock( &so->s_mutex );
 832         if ( so->s_flags & PS_IS_DETACHED ) {
 833                 filter_free( so->s_op->ors_filter );
 834                 for ( ga = so->s_op->o_groups; ga; ga=gnext ) {
 835                         gnext = ga->ga_next;
 836                         ch_free( ga );
 837                 }
 838                 ch_free( so->s_op );
 839         }
 840         ch_free( so->s_base.bv_val );
 841         for ( sr=so->s_res; sr; sr=srnext ) {
 842                 srnext = sr->s_next;
 843                 ch_free( sr );
 844         }
 845         ldap_pvt_thread_mutex_destroy( &so->s_mutex );
 846         ch_free( so );
 847 }
 848
 849 static int
 850 syncprov_drop_psearch( syncops *so, int lock )
 851 {
 852         if ( so->s_flags & PS_IS_DETACHED ) {
 853                 if ( lock )
 854                         ldap_pvt_thread_mutex_lock( &so->s_op->o_conn->c_mutex );
 855                 so->s_op->o_conn->c_n_ops_executing--;
 856                 so->s_op->o_conn->c_n_ops_completed++;
 857                 LDAP_STAILQ_REMOVE( &so->s_op->o_conn->c_ops, so->s_op, slap_op,
 858                         o_next );
 859                 if ( lock )
 860                         ldap_pvt_thread_mutex_unlock( &so->s_op->o_conn->c_mutex );
 861         }
 862         syncprov_free_syncop( so );
 863 }
 864
 865 static int
 866 syncprov_op_abandon( Operation *op, SlapReply *rs )
 867 {
 868         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
 869         syncprov_info_t         *si = on->on_bi.bi_private;
 870         syncops *so, *soprev;
 871
 872         ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
 873         for ( so=si->si_ops, soprev = (syncops *)&si->si_ops; so;
 874                 soprev=so, so=so->s_next ) {
 875                 if ( so->s_op->o_connid == op->o_connid &&
 876                         so->s_op->o_msgid == op->orn_msgid ) {
 877                                 so->s_op->o_abandon = 1;
 878                                 soprev->s_next = so->s_next;
 879                                 break;
 880                 }
 881         }
 882         ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
 883         if ( so ) {
 884                 /* Is this really a Cancel exop? */
 885                 if ( op->o_tag != LDAP_REQ_ABANDON ) {
 886                         rs->sr_err = LDAP_CANCELLED;
 887                         send_ldap_result( so->s_op, rs );
 888                 }
 889                 /* Our cloned searches have no ctrls set.
 890                  * we don't want to muck with real search ops
 891                  * from the frontend.
 892                  */
 893                 if ( ! so->s_op->o_sync )
 894                         syncprov_drop_psearch( so, 0 );
 895         }
 896         return SLAP_CB_CONTINUE;
 897 }
 898
 899 /* Find which persistent searches are affected by this operation */
 900 static void
 901 syncprov_matchops( Operation *op, opcookie *opc, int saveit )
 902 {
 903         slap_overinst *on = opc->son;
 904         syncprov_info_t         *si = on->on_bi.bi_private;
 905
 906         fbase_cookie fc;
 907         syncops *ss, *sprev, *snext;
 908         Entry *e;
 909         Attribute *a;
 910         int rc;
 911         struct berval newdn;
 912         int freefdn = 0;
 913
 914         fc.fdn = &op->o_req_ndn;
 915         /* compute new DN */
 916         if ( op->o_tag == LDAP_REQ_MODRDN && !saveit ) {
 917                 struct berval pdn;
 918                 if ( op->orr_nnewSup ) pdn = *op->orr_nnewSup;
 919                 else dnParent( fc.fdn, &pdn );
 920                 build_new_dn( &newdn, &pdn, &op->orr_nnewrdn, op->o_tmpmemctx );
 921                 fc.fdn = &newdn;
 922                 freefdn = 1;
 923         }
 924         if ( op->o_tag != LDAP_REQ_ADD ) {
 925                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
 926                 rc = be_entry_get_rw( op, fc.fdn, NULL, NULL, 0, &e );
 927                 op->o_bd->bd_info = (BackendInfo *)on;
 928                 if ( rc ) return;
 929         } else {
 930                 e = op->ora_e;
 931         }
 932
 933         /* Never replicate these */
 934         if ( is_entry_syncConsumerSubentry( e )) {
 935                 goto done;
 936         }
 937         if ( saveit ) {
 938                 ber_dupbv_x( &opc->sdn, &e->e_name, op->o_tmpmemctx );
 939                 ber_dupbv_x( &opc->sndn, &e->e_nname, op->o_tmpmemctx );
 940                 opc->sreference = is_entry_referral( e );
 941         }
 942         if ( saveit || op->o_tag == LDAP_REQ_ADD ) {
 943                 a = attr_find( e->e_attrs, slap_schema.si_ad_entryUUID );
 944                 if ( a )
 945                         ber_dupbv_x( &opc->suuid, &a->a_nvals[0], op->o_tmpmemctx );
 946         }
 947
 948         ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
 949         for (ss = si->si_ops, sprev = (syncops *)&si->si_ops; ss;
 950                 sprev = ss, ss=snext)
 951         {
 952                 syncmatches *sm;
 953                 int found = 0;
 954
 955                 snext = ss->s_next;
 956                 /* validate base */
 957                 fc.fss = ss;
 958                 fc.fbase = 0;
 959                 fc.fscope = 0;
 960
 961                 /* If the base of the search is missing, signal a refresh */
 962                 rc = syncprov_findbase( op, &fc );
 963                 if ( rc != LDAP_SUCCESS ) {
 964                         SlapReply rs = {REP_RESULT};
 965                         send_ldap_error( ss->s_op, &rs, LDAP_SYNC_REFRESH_REQUIRED,
 966                                 "search base has changed" );
 967                         sprev->s_next = snext;
 968                         syncprov_drop_psearch( ss, 1 );
 969                         continue;
 970                 }
 971
 972                 /* If we're sending results now, look for this op in old matches */
 973                 if ( !saveit ) {
 974                         syncmatches *old;
 975                         for ( sm=opc->smatches, old=(syncmatches *)&opc->smatches; sm;
 976                                 old=sm, sm=sm->sm_next ) {
 977                                 if ( sm->sm_op == ss ) {
 978                                         found = 1;
 979                                         old->sm_next = sm->sm_next;
 980                                         op->o_tmpfree( sm, op->o_tmpmemctx );
 981                                         break;
 982                                 }
 983                         }
 984                 }
 985
 986                 /* check if current o_req_dn is in scope and matches filter */
 987                 if ( fc.fscope && test_filter( op, e, ss->s_op->ors_filter ) ==
 988                         LDAP_COMPARE_TRUE ) {
 989                         if ( saveit ) {
 990                                 sm = op->o_tmpalloc( sizeof(syncmatches), op->o_tmpmemctx );
 991                                 sm->sm_next = opc->smatches;
 992                                 sm->sm_op = ss;
 993                                 ss->s_inuse++;
 994                                 opc->smatches = sm;
 995                         } else {
 996                                 /* if found send UPDATE else send ADD */
 997                                 syncprov_sendresp( op, opc, ss, e,
 998                                         found ? LDAP_SYNC_MODIFY : LDAP_SYNC_ADD, 1 );
 999                         }
1000                 } else if ( !saveit && found ) {
1001                         /* send DELETE */
1002                         syncprov_sendresp( op, opc, ss, NULL, LDAP_SYNC_DELETE, 1 );
1003                 }
1004         }
1005         ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
1006 done:
1007         if ( op->o_tag != LDAP_REQ_ADD ) {
1008                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
1009                 be_entry_release_rw( op, e, 0 );
1010                 op->o_bd->bd_info = (BackendInfo *)on;
1011         }
1012         if ( freefdn ) {
1013                 op->o_tmpfree( fc.fdn->bv_val, op->o_tmpmemctx );
1014         }
1015 }
1016
1017 static int
1018 syncprov_op_cleanup( Operation *op, SlapReply *rs )
1019 {
1020         slap_callback *cb = op->o_callback;
1021         opcookie *opc = cb->sc_private;
1022         slap_overinst *on = opc->son;
1023         syncprov_info_t         *si = on->on_bi.bi_private;
1024         syncmatches *sm, *snext;
1025         modtarget *mt, mtdummy;
1026
1027         for (sm = opc->smatches; sm; sm=snext) {
1028                 snext = sm->sm_next;
1029                 syncprov_free_syncop( sm->sm_op );
1030                 op->o_tmpfree( sm, op->o_tmpmemctx );
1031         }
1032
1033         /* Remove op from lock table */
1034         mtdummy.mt_op = op;
1035         ldap_pvt_thread_mutex_lock( &si->si_mods_mutex );
1036         mt = avl_find( si->si_mods, &mtdummy, sp_avl_cmp );
1037         ldap_pvt_thread_mutex_unlock( &si->si_mods_mutex );
1038         if ( mt ) {
1039                 modinst *mi = mt->mt_mods;
1040
1041                 /* If there are more, promote the next one */
1042                 ldap_pvt_thread_mutex_lock( &mt->mt_mutex );
1043                 if ( mi->mi_next ) {
1044                         mt->mt_mods = mi->mi_next;
1045                         mt->mt_op = mt->mt_mods->mi_op;
1046                         ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
1047                 } else {
1048                         ldap_pvt_thread_mutex_lock( &si->si_mods_mutex );
1049                         avl_delete( &si->si_mods, mt, sp_avl_cmp );
1050                         ldap_pvt_thread_mutex_unlock( &si->si_mods_mutex );
1051                         ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
1052                         ldap_pvt_thread_mutex_destroy( &mt->mt_mutex );
1053                         ch_free( mt );
1054                 }
1055         }
1056         if ( !BER_BVISNULL( &opc->suuid ))
1057                 op->o_tmpfree( opc->suuid.bv_val, op->o_tmpmemctx );
1058         if ( !BER_BVISNULL( &opc->sndn ))
1059                 op->o_tmpfree( opc->sndn.bv_val, op->o_tmpmemctx );
1060         if ( !BER_BVISNULL( &opc->sdn ))
1061                 op->o_tmpfree( opc->sdn.bv_val, op->o_tmpmemctx );
1062         op->o_callback = cb->sc_next;
1063         op->o_tmpfree(cb, op->o_tmpmemctx);
1064 }
1065
1066 static void
1067 syncprov_checkpoint( Operation *op, SlapReply *rs, slap_overinst *on )
1068 {
1069         syncprov_info_t         *si = on->on_bi.bi_private;
1070         Modifications mod;
1071         Operation opm;
1072         struct berval bv[2];
1073         BackendInfo *orig;
1074         slap_callback cb = {0};
1075
1076         mod.sml_values = bv;
1077         bv[1].bv_val = NULL;
1078         bv[0] = si->si_ctxcsn;
1079         mod.sml_nvalues = NULL;
1080         mod.sml_desc = slap_schema.si_ad_contextCSN;
1081         mod.sml_op = LDAP_MOD_REPLACE;
1082         mod.sml_next = NULL;
1083
1084         cb.sc_response = slap_null_cb;
1085         opm = *op;
1086         opm.o_tag = LDAP_REQ_MODIFY;
1087         opm.o_callback = &cb;
1088         opm.orm_modlist = &mod;
1089         opm.o_req_dn = op->o_bd->be_suffix[0];
1090         opm.o_req_ndn = op->o_bd->be_nsuffix[0];
1091         orig = opm.o_bd->bd_info;
1092         opm.o_bd->bd_info = on->on_info->oi_orig;
1093         opm.o_bd->be_modify( &opm, rs );
1094 }
1095
1096 static void
1097 syncprov_add_slog( Operation *op, struct berval *csn )
1098 {
1099         opcookie *opc = op->o_callback->sc_private;
1100         slap_overinst *on = opc->son;
1101         syncprov_info_t         *si = on->on_bi.bi_private;
1102         sessionlog *sl;
1103         slog_entry *se;
1104
1105         for ( sl = si->si_logs; sl; sl=sl->sl_next ) {
1106                 /* Allocate a record. UUIDs are not NUL-terminated. */
1107                 se = ch_malloc( sizeof( slog_entry ) + opc->suuid.bv_len +
1108                         csn->bv_len + 1 );
1109                 se->se_next = NULL;
1110                 se->se_tag = op->o_tag;
1111
1112                 se->se_uuid.bv_val = (char *)(se+1);
1113                 se->se_csn.bv_val = se->se_uuid.bv_val + opc->suuid.bv_len + 1;
1114                 AC_MEMCPY( se->se_uuid.bv_val, opc->suuid.bv_val, opc->suuid.bv_len );
1115                 se->se_uuid.bv_len = opc->suuid.bv_len;
1116
1117                 AC_MEMCPY( se->se_csn.bv_val, csn->bv_val, csn->bv_len );
1118                 se->se_csn.bv_val[csn->bv_len] = '\0';
1119                 se->se_csn.bv_len = csn->bv_len;
1120
1121                 ldap_pvt_thread_mutex_lock( &sl->sl_mutex );
1122                 if ( sl->sl_head ) {
1123                         sl->sl_tail->se_next = se;
1124                 } else {
1125                         sl->sl_head = se;
1126                 }
1127                 sl->sl_tail = se;
1128                 sl->sl_num++;
1129                 while ( sl->sl_num > sl->sl_size ) {
1130                         se = sl->sl_head;
1131                         sl->sl_head = se->se_next;
1132                         strcpy( sl->sl_mincsn.bv_val, se->se_csn.bv_val );
1133                         sl->sl_mincsn.bv_len = se->se_csn.bv_len;
1134                         ch_free( se );
1135                         sl->sl_num--;
1136                         if ( !sl->sl_head ) {
1137                                 sl->sl_tail = NULL;
1138                         }
1139                 }
1140                 ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
1141         }
1142 }
1143
1144 /* Just set a flag if we found the matching entry */
1145 static int
1146 playlog_cb( Operation *op, SlapReply *rs )
1147 {
1148         if ( rs->sr_type == REP_SEARCH ) {
1149                 op->o_callback->sc_private = (void *)1;
1150         }
1151         return rs->sr_err;
1152 }
1153
1154 /* enter with sl->sl_mutex locked, release before returning */
1155 static void
1156 syncprov_playlog( Operation *op, SlapReply *rs, sessionlog *sl,
1157         struct berval *oldcsn, struct berval *ctxcsn )
1158 {
1159         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
1160         syncprov_info_t         *si = on->on_bi.bi_private;
1161         slog_entry *se;
1162         int i, j, ndel, num, nmods, mmods;
1163         BerVarray uuids;
1164
1165         if ( !sl->sl_num ) {
1166                 ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
1167                 return;
1168         }
1169
1170         num = sl->sl_num;
1171         i = 0;
1172         nmods = 0;
1173
1174         uuids = op->o_tmpalloc( (num+1) * sizeof( struct berval ) +
1175                 num * UUID_LEN, op->o_tmpmemctx );
1176
1177         uuids[0].bv_val = (char *)(uuids + num + 1);
1178
1179         /* Make a copy of the relevant UUIDs. Put the Deletes up front
1180          * and everything else at the end. Do this first so we can
1181          * unlock the list mutex.
1182          */
1183         for ( se=sl->sl_head; se; se=se->se_next ) {
1184                 if ( ber_bvcmp( &se->se_csn, oldcsn ) < 0 ) continue;
1185                 if ( ber_bvcmp( &se->se_csn, ctxcsn ) > 0 ) break;
1186                 if ( se->se_tag == LDAP_REQ_DELETE ) {
1187                         j = i;
1188                         i++;
1189                 } else {
1190                         nmods++;
1191                         j = num - nmods;
1192                 }
1193                 uuids[j].bv_val = uuids[0].bv_val + (j * UUID_LEN);
1194                 AC_MEMCPY(uuids[j].bv_val, se->se_uuid.bv_val, UUID_LEN);
1195                 uuids[j].bv_len = UUID_LEN;
1196         }
1197         ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
1198
1199         ndel = i;
1200
1201         /* Zero out unused slots */
1202         for ( i=ndel; i < num - nmods; i++ )
1203                 uuids[i].bv_len = 0;
1204
1205         /* Mods must be validated to see if they belong in this delete set.
1206          */
1207
1208         mmods = nmods;
1209         /* Strip any duplicates */
1210         for ( i=0; i<nmods; i++ ) {
1211                 for ( j=0; j<ndel; j++ ) {
1212                         if ( bvmatch( &uuids[j], &uuids[num - 1 - i] )) {
1213                                 uuids[num - 1 - i].bv_len = 0;
1214                                 mmods --;
1215                                 break;
1216                         }
1217                 }
1218                 if ( uuids[num - 1 - i].bv_len == 0 ) continue;
1219                 for ( j=0; j<i; j++ ) {
1220                         if ( bvmatch( &uuids[num - 1 - j], &uuids[num - 1 - i] )) {
1221                                 uuids[num - 1 - i].bv_len = 0;
1222                                 mmods --;
1223                                 break;
1224                         }
1225                 }
1226         }
1227
1228         if ( mmods ) {
1229                 Operation fop;
1230                 SlapReply frs = { REP_RESULT };
1231                 int rc;
1232                 Filter mf, af;
1233                 AttributeAssertion eq;
1234                 slap_callback cb = {0};
1235
1236                 fop = *op;
1237
1238                 fop.o_sync_mode = 0;
1239                 fop.o_callback = &cb;
1240                 fop.ors_limit = NULL;
1241                 fop.ors_tlimit = SLAP_NO_LIMIT;
1242                 fop.ors_attrs = slap_anlist_all_attributes;
1243                 fop.ors_attrsonly = 0;
1244                 fop.o_managedsait = SLAP_CONTROL_CRITICAL;
1245
1246                 af.f_choice = LDAP_FILTER_AND;
1247                 af.f_next = NULL;
1248                 af.f_and = &mf;
1249                 mf.f_choice = LDAP_FILTER_EQUALITY;
1250                 mf.f_ava = &eq;
1251                 mf.f_av_desc = slap_schema.si_ad_entryUUID;
1252                 mf.f_next = fop.ors_filter;
1253
1254                 fop.ors_filter = &af;
1255
1256                 cb.sc_response = playlog_cb;
1257                 fop.o_bd->bd_info = on->on_info->oi_orig;
1258
1259                 for ( i=ndel; i<num; i++ ) {
1260                         if ( uuids[i].bv_len == 0 ) continue;
1261
1262                         mf.f_av_value = uuids[i];
1263                         cb.sc_private = NULL;
1264                         fop.ors_slimit = 1;
1265                         rc = fop.o_bd->be_search( &fop, &frs );
1266
1267                         /* If entry was not found, add to delete list */
1268                         if ( !cb.sc_private ) {
1269                                 uuids[ndel++] = uuids[i];
1270                         }
1271                 }
1272                 fop.o_bd->bd_info = (BackendInfo *)on;
1273         }
1274         if ( ndel ) {
1275                 uuids[ndel].bv_val = NULL;
1276                 syncprov_sendinfo( op, rs, LDAP_TAG_SYNC_ID_SET, NULL, 0, uuids, 1 );
1277         }
1278 }
1279
1280 static int
1281 syncprov_op_response( Operation *op, SlapReply *rs )
1282 {
1283         opcookie *opc = op->o_callback->sc_private;
1284         slap_overinst *on = opc->son;
1285         syncprov_info_t         *si = on->on_bi.bi_private;
1286         syncmatches *sm;
1287
1288         if ( rs->sr_err == LDAP_SUCCESS )
1289         {
1290                 struct berval maxcsn = BER_BVNULL, curcsn = BER_BVNULL;
1291                 char cbuf[LDAP_LUTIL_CSNSTR_BUFSIZE];
1292
1293                 /* Update our context CSN */
1294                 cbuf[0] = '\0';
1295                 ldap_pvt_thread_mutex_lock( &si->si_csn_mutex );
1296                 slap_get_commit_csn( op, &maxcsn, &curcsn );
1297                 if ( !BER_BVISNULL( &maxcsn ) ) {
1298                         strcpy( cbuf, maxcsn.bv_val );
1299                         if ( ber_bvcmp( &maxcsn, &si->si_ctxcsn ) > 0 ) {
1300                                 strcpy( si->si_ctxcsnbuf, cbuf );
1301                                 si->si_ctxcsn.bv_len = maxcsn.bv_len;
1302                         }
1303                 }
1304
1305                 si->si_numops++;
1306                 if ( si->si_chkops || si->si_chktime ) {
1307                         int do_check=0;
1308                         if ( si->si_chkops && si->si_numops >= si->si_chkops ) {
1309                                 do_check = 1;
1310                                 si->si_numops = 0;
1311                         }
1312                         if ( si->si_chktime &&
1313                                 (op->o_time - si->si_chklast >= si->si_chktime )) {
1314                                 do_check = 1;
1315                                 si->si_chklast = op->o_time;
1316                         }
1317                         if ( do_check ) {
1318                                 syncprov_checkpoint( op, rs, on );
1319                         }
1320                 }
1321                 ldap_pvt_thread_mutex_unlock( &si->si_csn_mutex );
1322
1323                 opc->sctxcsn.bv_len = maxcsn.bv_len;
1324                 opc->sctxcsn.bv_val = cbuf;
1325
1326                 /* Handle any persistent searches */
1327                 if ( si->si_ops ) {
1328                         switch(op->o_tag) {
1329                         case LDAP_REQ_ADD:
1330                         case LDAP_REQ_MODIFY:
1331                         case LDAP_REQ_MODRDN:
1332                         case LDAP_REQ_EXTENDED:
1333                                 syncprov_matchops( op, opc, 0 );
1334                                 break;
1335                         case LDAP_REQ_DELETE:
1336                                 /* for each match in opc->smatches:
1337                                  *   send DELETE msg
1338                                  */
1339                                 ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
1340                                 for ( sm = opc->smatches; sm; sm=sm->sm_next ) {
1341                                         if ( sm->sm_op->s_op->o_abandon )
1342                                                 continue;
1343                                         syncprov_sendresp( op, opc, sm->sm_op, NULL,
1344                                                 LDAP_SYNC_DELETE, 1 );
1345                                 }
1346                                 ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
1347                                 break;
1348                         }
1349                 }
1350
1351                 /* Add any log records */
1352                 if ( si->si_logs && op->o_tag != LDAP_REQ_ADD ) {
1353                         syncprov_add_slog( op, &curcsn );
1354                 }
1355
1356         }
1357         return SLAP_CB_CONTINUE;
1358 }
1359
1360 /* We don't use a subentry to store the context CSN any more.
1361  * We expose the current context CSN as an operational attribute
1362  * of the suffix entry.
1363  */
1364 static int
1365 syncprov_op_compare( Operation *op, SlapReply *rs )
1366 {
1367         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
1368         syncprov_info_t         *si = on->on_bi.bi_private;
1369         int rc = SLAP_CB_CONTINUE;
1370
1371         if ( dn_match( &op->o_req_ndn, op->o_bd->be_nsuffix ) &&
1372                 op->oq_compare.rs_ava->aa_desc == slap_schema.si_ad_contextCSN )
1373         {
1374                 Entry e = {0};
1375                 Attribute a = {0};
1376                 struct berval bv[2];
1377
1378                 e.e_name = op->o_bd->be_suffix[0];
1379                 e.e_nname = op->o_bd->be_nsuffix[0];
1380
1381                 BER_BVZERO( &bv[1] );
1382                 bv[0] = si->si_ctxcsn;
1383
1384                 a.a_desc = slap_schema.si_ad_contextCSN;
1385                 a.a_vals = bv;
1386                 a.a_nvals = a.a_vals;
1387
1388                 ldap_pvt_thread_mutex_lock( &si->si_csn_mutex );
1389
1390                 rs->sr_err = access_allowed( op, &e, op->oq_compare.rs_ava->aa_desc,
1391                         &op->oq_compare.rs_ava->aa_value, ACL_COMPARE, NULL );
1392                 if ( ! rs->sr_err ) {
1393                         rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
1394                         goto return_results;
1395                 }
1396
1397                 if ( get_assert( op ) &&
1398                         ( test_filter( op, &e, get_assertion( op ) ) != LDAP_COMPARE_TRUE ) )
1399                 {
1400                         rs->sr_err = LDAP_ASSERTION_FAILED;
1401                         goto return_results;
1402                 }
1403
1404
1405                 rs->sr_err = LDAP_COMPARE_FALSE;
1406
1407                 if ( value_find_ex( op->oq_compare.rs_ava->aa_desc,
1408                         SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
1409                                 SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
1410                                 a.a_nvals, &op->oq_compare.rs_ava->aa_value, op->o_tmpmemctx ) == 0 )
1411                 {
1412                         rs->sr_err = LDAP_COMPARE_TRUE;
1413                 }
1414
1415 return_results:;
1416
1417                 ldap_pvt_thread_mutex_unlock( &si->si_csn_mutex );
1418
1419                 send_ldap_result( op, rs );
1420
1421                 if( rs->sr_err == LDAP_COMPARE_FALSE || rs->sr_err == LDAP_COMPARE_TRUE ) {
1422                         rs->sr_err = LDAP_SUCCESS;
1423                 }
1424                 rc = rs->sr_err;
1425         }
1426
1427         return rc;
1428 }
1429
1430 static int
1431 syncprov_op_mod( Operation *op, SlapReply *rs )
1432 {
1433         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
1434         syncprov_info_t         *si = on->on_bi.bi_private;
1435
1436         slap_callback *cb = op->o_tmpcalloc(1, sizeof(slap_callback)+
1437                 sizeof(opcookie) +
1438                 (si->si_ops ? sizeof(modinst) : 0 ),
1439                 op->o_tmpmemctx);
1440         opcookie *opc = (opcookie *)(cb+1);
1441         opc->son = on;
1442         cb->sc_response = syncprov_op_response;
1443         cb->sc_cleanup = syncprov_op_cleanup;
1444         cb->sc_private = opc;
1445         cb->sc_next = op->o_callback;
1446         op->o_callback = cb;
1447
1448         /* If there are active persistent searches, lock this operation.
1449          * See seqmod.c for the locking logic on its own.
1450          */
1451         if ( si->si_ops ) {
1452                 modtarget *mt, mtdummy;
1453                 modinst *mi;
1454
1455                 mi = (modinst *)(opc+1);
1456                 mi->mi_op = op;
1457
1458                 /* See if we're already modifying this entry... */
1459                 mtdummy.mt_op = op;
1460                 ldap_pvt_thread_mutex_lock( &si->si_mods_mutex );
1461                 mt = avl_find( si->si_mods, &mtdummy, sp_avl_cmp );
1462                 if ( mt ) {
1463                         ldap_pvt_thread_mutex_lock( &mt->mt_mutex );
1464                         ldap_pvt_thread_mutex_unlock( &si->si_mods_mutex );
1465                         mt->mt_tail->mi_next = mi;
1466                         mt->mt_tail = mi;
1467                         /* wait for this op to get to head of list */
1468                         while ( mt->mt_mods != mi ) {
1469                                 ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
1470                                 ldap_pvt_thread_yield();
1471                                 ldap_pvt_thread_mutex_lock( &mt->mt_mutex );
1472                         }
1473                         ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
1474                 } else {
1475                         /* Record that we're modifying this entry now */
1476                         mt = ch_malloc( sizeof(modtarget) );
1477                         mt->mt_mods = mi;
1478                         mt->mt_tail = mi;
1479                         mt->mt_op = mi->mi_op;
1480                         ldap_pvt_thread_mutex_init( &mt->mt_mutex );
1481                         avl_insert( &si->si_mods, mt, sp_avl_cmp, avl_dup_error );
1482                         ldap_pvt_thread_mutex_unlock( &si->si_mods_mutex );
1483                 }
1484         }
1485
1486         if (( si->si_ops || si->si_logs ) && op->o_tag != LDAP_REQ_ADD )
1487                 syncprov_matchops( op, opc, 1 );
1488
1489
1490         return SLAP_CB_CONTINUE;
1491 }
1492
1493 static int
1494 syncprov_op_extended( Operation *op, SlapReply *rs )
1495 {
1496         if ( exop_is_write( op ))
1497                 return syncprov_op_mod( op, rs );
1498
1499         return SLAP_CB_CONTINUE;
1500 }
1501
1502 typedef struct searchstate {
1503         slap_overinst *ss_on;
1504         syncops *ss_so;
1505         int ss_present;
1506 } searchstate;
1507
1508 static int
1509 syncprov_search_cleanup( Operation *op, SlapReply *rs )
1510 {
1511         if ( rs->sr_ctrls ) {
1512                 op->o_tmpfree( rs->sr_ctrls[0], op->o_tmpmemctx );
1513                 op->o_tmpfree( rs->sr_ctrls, op->o_tmpmemctx );
1514                 rs->sr_ctrls = NULL;
1515         }
1516         return 0;
1517 }
1518
1519 static void
1520 syncprov_detach_op( Operation *op, syncops *so )
1521 {
1522         Operation *op2;
1523         int i, alen = 0;
1524         size_t size;
1525         char *ptr;
1526         GroupAssertion *g1, *g2;
1527
1528         /* count the search attrs */
1529         for (i=0; op->ors_attrs && !BER_BVISNULL( &op->ors_attrs[i].an_name ); i++) {
1530                 alen += op->ors_attrs[i].an_name.bv_len + 1;
1531         }
1532         /* Make a new copy of the operation */
1533         size = sizeof(Operation) + sizeof(Opheader) +
1534                 (i ? ( (i+1) * sizeof(AttributeName) + alen) : 0) +
1535                 op->o_req_dn.bv_len + 1 +
1536                 op->o_req_ndn.bv_len + 1 +
1537                 op->o_ndn.bv_len + 1 +
1538                 so->s_filterstr.bv_len + 1;
1539         op2 = (Operation *)ch_calloc( 1, size );
1540         op2->o_hdr = (Opheader *)(op2+1);
1541
1542         /* Copy the fields we care about explicitly, leave the rest alone */
1543         *op2->o_hdr = *op->o_hdr;
1544         op2->o_tag = op->o_tag;
1545         op2->o_time = op->o_time;
1546         op2->o_bd = op->o_bd;
1547         op2->o_request = op->o_request;
1548
1549         if ( i ) {
1550                 op2->ors_attrs = (AttributeName *)(op2->o_hdr + 1);
1551                 ptr = (char *)(op2->ors_attrs+i+1);
1552                 for (i=0; !BER_BVISNULL( &op->ors_attrs[i].an_name ); i++) {
1553                         op2->ors_attrs[i] = op->ors_attrs[i];
1554                         op2->ors_attrs[i].an_name.bv_val = ptr;
1555                         ptr = lutil_strcopy( ptr, op->ors_attrs[i].an_name.bv_val ) + 1;
1556                 }
1557                 BER_BVZERO( &op2->ors_attrs[i].an_name );
1558         } else {
1559                 ptr = (char *)(op2->o_hdr + 1);
1560         }
1561         op2->o_authz = op->o_authz;
1562         op2->o_ndn.bv_val = ptr;
1563         ptr = lutil_strcopy(ptr, op->o_ndn.bv_val) + 1;
1564         op2->o_dn = op2->o_ndn;
1565         op2->o_req_dn.bv_len = op->o_req_dn.bv_len;
1566         op2->o_req_dn.bv_val = ptr;
1567         ptr = lutil_strcopy(ptr, op->o_req_dn.bv_val) + 1;
1568         op2->o_req_ndn.bv_len = op->o_req_ndn.bv_len;
1569         op2->o_req_ndn.bv_val = ptr;
1570         ptr = lutil_strcopy(ptr, op->o_req_ndn.bv_val) + 1;
1571         op2->ors_filterstr.bv_val = ptr;
1572         strcpy( ptr, so->s_filterstr.bv_val );
1573         op2->ors_filterstr.bv_len = so->s_filterstr.bv_len;
1574         op2->ors_filter = str2filter( ptr );
1575         so->s_op = op2;
1576
1577         /* Copy any cached group ACLs individually */
1578         op2->o_groups = NULL;
1579         for ( g1=op->o_groups; g1; g1=g1->ga_next ) {
1580                 g2 = ch_malloc( sizeof(GroupAssertion) + g1->ga_len );
1581                 *g2 = *g1;
1582                 strcpy( g2->ga_ndn, g1->ga_ndn );
1583                 g2->ga_next = op2->o_groups;
1584                 op2->o_groups = g2;
1585         }
1586
1587         /* Add op2 to conn so abandon will find us */
1588         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1589         op->o_conn->c_n_ops_executing++;
1590         op->o_conn->c_n_ops_completed--;
1591         LDAP_STAILQ_INSERT_TAIL( &op->o_conn->c_ops, op2, o_next );
1592         so->s_flags |= PS_IS_DETACHED;
1593         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1594 }
1595
1596 static int
1597 syncprov_search_response( Operation *op, SlapReply *rs )
1598 {
1599         searchstate *ss = op->o_callback->sc_private;
1600         slap_overinst *on = ss->ss_on;
1601         syncprov_info_t         *si = on->on_bi.bi_private;
1602         sync_control *srs = op->o_controls[slap_cids.sc_LDAPsync];
1603
1604         if ( rs->sr_type == REP_SEARCH || rs->sr_type == REP_SEARCHREF ) {
1605                 int i;
1606                 /* If we got a referral without a referral object, there's
1607                  * something missing that we cannot replicate. Just ignore it.
1608                  * The consumer will abort because we didn't send the expected
1609                  * control.
1610                  */
1611                 if ( !rs->sr_entry ) {
1612                         assert( rs->sr_entry );
1613                         Debug( LDAP_DEBUG_ANY, "bogus referral in context\n",0,0,0 );
1614                         return SLAP_CB_CONTINUE;
1615                 }
1616                 if ( srs->sr_state.ctxcsn ) {
1617                         Attribute *a = attr_find( rs->sr_entry->e_attrs,
1618                                 slap_schema.si_ad_entryCSN );
1619
1620                         /* Don't send the ctx entry twice */
1621                         if ( a && bvmatch( &a->a_nvals[0], srs->sr_state.ctxcsn ) )
1622                                 return LDAP_SUCCESS;
1623                 }
1624                 rs->sr_ctrls = op->o_tmpalloc( sizeof(LDAPControl *)*2,
1625                         op->o_tmpmemctx );
1626                 rs->sr_ctrls[1] = NULL;
1627                 rs->sr_err = syncprov_state_ctrl( op, rs, rs->sr_entry,
1628                         LDAP_SYNC_ADD, rs->sr_ctrls, 0, 0, NULL );
1629         } else if ( rs->sr_type == REP_RESULT && rs->sr_err == LDAP_SUCCESS ) {
1630                 struct berval cookie;
1631
1632                 slap_compose_sync_cookie( op, &cookie,
1633                         &op->ors_filter->f_and->f_ava->aa_value,
1634                         srs->sr_state.sid, srs->sr_state.rid );
1635
1636                 /* Is this a regular refresh? */
1637                 if ( !ss->ss_so ) {
1638                         rs->sr_ctrls = op->o_tmpalloc( sizeof(LDAPControl *)*2,
1639                                 op->o_tmpmemctx );
1640                         rs->sr_ctrls[1] = NULL;
1641                         rs->sr_err = syncprov_done_ctrl( op, rs, rs->sr_ctrls,
1642                                 0, 1, &cookie, ss->ss_present ?  LDAP_SYNC_REFRESH_PRESENTS :
1643                                         LDAP_SYNC_REFRESH_DELETES );
1644                 } else {
1645                         int locked = 0;
1646                 /* It's RefreshAndPersist, transition to Persist phase */
1647                         syncprov_sendinfo( op, rs, ( ss->ss_present && rs->sr_nentries ) ?
1648                                 LDAP_TAG_SYNC_REFRESH_PRESENT : LDAP_TAG_SYNC_REFRESH_DELETE,
1649                                 &cookie, 1, NULL, 0 );
1650                         /* Flush any queued persist messages */
1651                         if ( ss->ss_so->s_res ) {
1652                                 syncres *sr, *srnext;
1653                                 Entry *e;
1654                                 opcookie opc;
1655
1656                                 opc.son = on;
1657                                 ldap_pvt_thread_mutex_lock( &ss->ss_so->s_mutex );
1658                                 locked = 1;
1659                                 for (sr = ss->ss_so->s_res; sr; sr=srnext) {
1660                                         int rc = LDAP_SUCCESS;
1661                                         srnext = sr->s_next;
1662                                         opc.sdn = sr->s_dn;
1663                                         opc.sndn = sr->s_ndn;
1664                                         opc.suuid = sr->s_uuid;
1665                                         opc.sctxcsn = sr->s_csn;
1666                                         opc.sreference = sr->s_isreference;
1667                                         e = NULL;
1668
1669                                         if ( sr->s_mode != LDAP_SYNC_DELETE ) {
1670                                                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
1671                                                 rc = be_entry_get_rw( op, &opc.sndn, NULL, NULL, 0, &e );
1672                                                 op->o_bd->bd_info = (BackendInfo *)on;
1673                                         }
1674                                         if ( rc == LDAP_SUCCESS )
1675                                                 syncprov_sendresp( op, &opc, ss->ss_so, e,
1676                                                         sr->s_mode, 0 );
1677
1678                                         if ( e ) {
1679                                                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
1680                                                 be_entry_release_rw( op, e, 0 );
1681                                                 op->o_bd->bd_info = (BackendInfo *)on;
1682                                         }
1683                                         ch_free( sr );
1684                                 }
1685                                 ss->ss_so->s_res = NULL;
1686                                 ss->ss_so->s_restail = NULL;
1687                         }
1688
1689                         /* Turn off the refreshing flag */
1690                         ss->ss_so->s_flags ^= PS_IS_REFRESHING;
1691                         if ( locked )
1692                                 ldap_pvt_thread_mutex_unlock( &ss->ss_so->s_mutex );
1693
1694                         /* Detach this Op from frontend control */
1695                         syncprov_detach_op( op, ss->ss_so );
1696
1697                         return LDAP_SUCCESS;
1698                 }
1699         }
1700
1701         return SLAP_CB_CONTINUE;
1702 }
1703
1704 static int
1705 syncprov_op_search( Operation *op, SlapReply *rs )
1706 {
1707         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
1708         syncprov_info_t         *si = (syncprov_info_t *)on->on_bi.bi_private;
1709         slap_callback   *cb;
1710         int gotstate = 0, nochange = 0, do_present = 1;
1711         Filter *fand, *fava;
1712         syncops *sop = NULL;
1713         searchstate *ss;
1714         sync_control *srs;
1715         struct berval ctxcsn;
1716         char csnbuf[LDAP_LUTIL_CSNSTR_BUFSIZE];
1717
1718         if ( !(op->o_sync_mode & SLAP_SYNC_REFRESH) ) return SLAP_CB_CONTINUE;
1719
1720         if ( op->ors_deref & LDAP_DEREF_SEARCHING ) {
1721                 send_ldap_error( op, rs, LDAP_PROTOCOL_ERROR, "illegal value for derefAliases" );
1722                 return rs->sr_err;
1723         }
1724
1725         srs = op->o_controls[slap_cids.sc_LDAPsync];
1726
1727         /* If this is a persistent search, set it up right away */
1728         if ( op->o_sync_mode & SLAP_SYNC_PERSIST ) {
1729                 syncops so = {0};
1730                 fbase_cookie fc;
1731                 opcookie opc;
1732                 slap_callback sc;
1733
1734                 fc.fss = &so;
1735                 fc.fbase = 0;
1736                 so.s_eid = NOID;
1737                 so.s_op = op;
1738                 so.s_flags = PS_IS_REFRESHING;
1739                 /* syncprov_findbase expects to be called as a callback... */
1740                 sc.sc_private = &opc;
1741                 opc.son = on;
1742                 cb = op->o_callback;
1743                 op->o_callback = &sc;
1744                 rs->sr_err = syncprov_findbase( op, &fc );
1745                 op->o_callback = cb;
1746
1747                 if ( rs->sr_err != LDAP_SUCCESS ) {
1748                         send_ldap_result( op, rs );
1749                         return rs->sr_err;
1750                 }
1751                 sop = ch_malloc( sizeof( syncops ));
1752                 *sop = so;
1753                 ldap_pvt_thread_mutex_init( &sop->s_mutex );
1754                 sop->s_sid = srs->sr_state.sid;
1755                 sop->s_rid = srs->sr_state.rid;
1756                 sop->s_inuse = 1;
1757
1758                 ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
1759                 sop->s_next = si->si_ops;
1760                 si->si_ops = sop;
1761                 ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
1762         }
1763
1764         /* snapshot the ctxcsn */
1765         ldap_pvt_thread_mutex_lock( &si->si_csn_mutex );
1766         strcpy( csnbuf, si->si_ctxcsnbuf );
1767         ctxcsn.bv_len = si->si_ctxcsn.bv_len;
1768         ldap_pvt_thread_mutex_unlock( &si->si_csn_mutex );
1769         ctxcsn.bv_val = csnbuf;
1770
1771         /* If we have a cookie, handle the PRESENT lookups */
1772         if ( srs->sr_state.ctxcsn ) {
1773                 sessionlog *sl;
1774
1775                 /* The cookie was validated when it was parsed, just use it */
1776
1777                 /* If just Refreshing and nothing has changed, shortcut it */
1778                 if ( bvmatch( srs->sr_state.ctxcsn, &ctxcsn )) {
1779                         nochange = 1;
1780                         if ( !(op->o_sync_mode & SLAP_SYNC_PERSIST) ) {
1781                                 LDAPControl     *ctrls[2];
1782
1783                                 ctrls[0] = NULL;
1784                                 ctrls[1] = NULL;
1785                                 syncprov_done_ctrl( op, rs, ctrls, 0, 0,
1786                                         NULL, LDAP_SYNC_REFRESH_DELETES );
1787                                 rs->sr_ctrls = ctrls;
1788                                 rs->sr_err = LDAP_SUCCESS;
1789                                 send_ldap_result( op, rs );
1790                                 rs->sr_ctrls = NULL;
1791                                 return rs->sr_err;
1792                         }
1793                         goto shortcut;
1794                 }
1795                 /* Do we have a sessionlog for this search? */
1796                 for ( sl=si->si_logs; sl; sl=sl->sl_next )
1797                         if ( sl->sl_sid == srs->sr_state.sid ) break;
1798                 if ( sl ) {
1799                         ldap_pvt_thread_mutex_lock( &sl->sl_mutex );
1800                         if ( ber_bvcmp( srs->sr_state.ctxcsn, &sl->sl_mincsn ) >= 0 ) {
1801                                 do_present = 0;
1802                                 /* mutex is unlocked in playlog */
1803                                 syncprov_playlog( op, rs, sl, srs->sr_state.ctxcsn, &ctxcsn );
1804                         } else {
1805                                 ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
1806                         }
1807                 }
1808                 /* Is the CSN still present in the database? */
1809                 if ( syncprov_findcsn( op, FIND_CSN ) != LDAP_SUCCESS ) {
1810                         /* No, so a reload is required */
1811 #if 0           /* the consumer doesn't seem to send this hint */
1812                         if ( op->o_sync_rhint == 0 ) {
1813                                 send_ldap_error( op, rs, LDAP_SYNC_REFRESH_REQUIRED, "sync cookie is stale" );
1814                                 return rs->sr_err;
1815                         }
1816 #endif
1817                 } else {
1818                         gotstate = 1;
1819                         /* If changed and doing Present lookup, send Present UUIDs */
1820                         if ( do_present && syncprov_findcsn( op, FIND_PRESENT ) !=
1821                                 LDAP_SUCCESS ) {
1822                                 send_ldap_result( op, rs );
1823                                 return rs->sr_err;
1824                         }
1825                 }
1826         }
1827
1828 shortcut:
1829         /* Append CSN range to search filter, save original filter
1830          * for persistent search evaluation
1831          */
1832         if ( sop ) {
1833                 sop->s_filterstr= op->ors_filterstr;
1834         }
1835
1836         fand = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
1837         fand->f_choice = LDAP_FILTER_AND;
1838         fand->f_next = NULL;
1839         fava = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
1840         fava->f_choice = LDAP_FILTER_LE;
1841         fava->f_ava = op->o_tmpalloc( sizeof(AttributeAssertion), op->o_tmpmemctx );
1842         fava->f_ava->aa_desc = slap_schema.si_ad_entryCSN;
1843         ber_dupbv_x( &fava->f_ava->aa_value, &ctxcsn, op->o_tmpmemctx );
1844         fand->f_and = fava;
1845         if ( gotstate ) {
1846                 fava->f_next = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
1847                 fava = fava->f_next;
1848                 fava->f_choice = LDAP_FILTER_GE;
1849                 fava->f_ava = op->o_tmpalloc( sizeof(AttributeAssertion), op->o_tmpmemctx );
1850                 fava->f_ava->aa_desc = slap_schema.si_ad_entryCSN;
1851                 ber_dupbv_x( &fava->f_ava->aa_value, srs->sr_state.ctxcsn, op->o_tmpmemctx );
1852         }
1853         fava->f_next = op->ors_filter;
1854         op->ors_filter = fand;
1855         filter2bv_x( op, op->ors_filter, &op->ors_filterstr );
1856
1857         /* Let our callback add needed info to returned entries */
1858         cb = op->o_tmpcalloc(1, sizeof(slap_callback)+sizeof(searchstate), op->o_tmpmemctx);
1859         ss = (searchstate *)(cb+1);
1860         ss->ss_on = on;
1861         ss->ss_so = sop;
1862         ss->ss_present = do_present;
1863         cb->sc_response = syncprov_search_response;
1864         cb->sc_cleanup = syncprov_search_cleanup;
1865         cb->sc_private = ss;
1866         cb->sc_next = op->o_callback;
1867         op->o_callback = cb;
1868
1869 #if 0   /* I don't think we need to shortcircuit back-bdb any more */
1870         op->o_sync_mode &= SLAP_CONTROL_MASK;
1871 #endif
1872
1873         /* If this is a persistent search and no changes were reported during
1874          * the refresh phase, just invoke the response callback to transition
1875          * us into persist phase
1876          */
1877         if ( nochange ) {
1878                 rs->sr_err = LDAP_SUCCESS;
1879                 rs->sr_nentries = 0;
1880                 send_ldap_result( op, rs );
1881                 return rs->sr_err;
1882         }
1883         return SLAP_CB_CONTINUE;
1884 }
1885
1886 static int
1887 syncprov_operational(
1888         Operation *op,
1889         SlapReply *rs )
1890 {
1891         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
1892         syncprov_info_t         *si = (syncprov_info_t *)on->on_bi.bi_private;
1893
1894         if ( rs->sr_entry &&
1895                 dn_match( &rs->sr_entry->e_nname, op->o_bd->be_nsuffix )) {
1896
1897                 if ( SLAP_OPATTRS( rs->sr_attr_flags ) ||
1898                         ad_inlist( slap_schema.si_ad_contextCSN, rs->sr_attrs )) {
1899                         Attribute *a, **ap = NULL;
1900
1901                         for ( a=rs->sr_entry->e_attrs; a; a=a->a_next ) {
1902                                 if ( a->a_desc == slap_schema.si_ad_contextCSN )
1903                                         break;
1904                         }
1905
1906                         if ( !a ) {
1907                                 for ( ap = &rs->sr_operational_attrs; *ap; ap=&(*ap)->a_next );
1908
1909                                 a = ch_malloc( sizeof(Attribute));
1910                                 a->a_desc = slap_schema.si_ad_contextCSN;
1911                                 a->a_vals = ch_malloc( 2 * sizeof(struct berval));
1912                                 a->a_vals[1].bv_val = NULL;
1913                                 a->a_nvals = a->a_vals;
1914                                 a->a_next = NULL;
1915                                 a->a_flags = 0;
1916                                 *ap = a;
1917                         }
1918
1919                         ldap_pvt_thread_mutex_lock( &si->si_csn_mutex );
1920                         if ( !ap ) {
1921                                 strcpy( a->a_vals[0].bv_val, si->si_ctxcsnbuf );
1922                         } else {
1923                                 ber_dupbv( &a->a_vals[0], &si->si_ctxcsn );
1924                         }
1925                         ldap_pvt_thread_mutex_unlock( &si->si_csn_mutex );
1926                 }
1927         }
1928         return SLAP_CB_CONTINUE;
1929 }
1930
1931 static int
1932 syncprov_db_config(
1933         BackendDB       *be,
1934         const char      *fname,
1935         int             lineno,
1936         int             argc,
1937         char    **argv
1938 )
1939 {
1940         slap_overinst           *on = (slap_overinst *)be->bd_info;
1941         syncprov_info_t         *si = (syncprov_info_t *)on->on_bi.bi_private;
1942
1943         if ( strcasecmp( argv[ 0 ], "syncprov-checkpoint" ) == 0 ) {
1944                 if ( argc != 3 ) {
1945                         fprintf( stderr, "%s: line %d: wrong number of arguments in "
1946                                 "\"syncprov-checkpoint <ops> <minutes>\"\n", fname, lineno );
1947                         return -1;
1948                 }
1949                 si->si_chkops = atoi( argv[1] );
1950                 si->si_chktime = atoi( argv[2] ) * 60;
1951                 return 0;
1952
1953         } else if ( strcasecmp( argv[0], "syncprov-sessionlog" ) == 0 ) {
1954                 sessionlog *sl;
1955                 int sid, size;
1956                 if ( argc != 3 ) {
1957                         fprintf( stderr, "%s: line %d: wrong number of arguments in "
1958                                 "\"syncprov-sessionlog <sid> <size>\"\n", fname, lineno );
1959                         return -1;
1960                 }
1961                 sid = atoi( argv[1] );
1962                 if ( sid < 0 || sid > 999 ) {
1963                         fprintf( stderr,
1964                                 "%s: line %d: session log id %d is out of range [0..999]\n",
1965                                 fname, lineno, sid );
1966                         return -1;
1967                 }
1968                 size = atoi( argv[2] );
1969                 if ( size < 0 ) {
1970                         fprintf( stderr,
1971                                 "%s: line %d: session log size %d is negative\n",
1972                                 fname, lineno, size );
1973                         return -1;
1974                 }
1975                 for ( sl = si->si_logs; sl; sl=sl->sl_next ) {
1976                         if ( sl->sl_sid == sid ) {
1977                                 sl->sl_size = size;
1978                                 break;
1979                         }
1980                 }
1981                 if ( !sl ) {
1982                         sl = ch_malloc( sizeof( sessionlog ) + LDAP_LUTIL_CSNSTR_BUFSIZE );
1983                         sl->sl_mincsn.bv_val = (char *)(sl+1);
1984                         sl->sl_mincsn.bv_len = 0;
1985                         sl->sl_sid = sid;
1986                         sl->sl_size = size;
1987                         sl->sl_num = 0;
1988                         sl->sl_head = sl->sl_tail = NULL;
1989                         sl->sl_next = si->si_logs;
1990                         ldap_pvt_thread_mutex_init( &sl->sl_mutex );
1991                         si->si_logs = sl;
1992                 }
1993                 return 0;
1994         }
1995
1996         return SLAP_CONF_UNKNOWN;
1997 }
1998
1999 /* Cheating - we have no thread pool context for these functions,
2000  * so make one.
2001  */
2002 typedef struct thread_keys {
2003         void *key;
2004         void *data;
2005         ldap_pvt_thread_pool_keyfree_t *xfree;
2006 } thread_keys;
2007
2008 #define MAXKEYS 32
2009 /* A fake thread context */
2010 static thread_keys thrctx[MAXKEYS];
2011
2012 /* Read any existing contextCSN from the underlying db.
2013  * Then search for any entries newer than that. If no value exists,
2014  * just generate it. Cache whatever result.
2015  */
2016 static int
2017 syncprov_db_open(
2018     BackendDB *be
2019 )
2020 {
2021         slap_overinst   *on = (slap_overinst *) be->bd_info;
2022         syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
2023
2024         Connection conn;
2025         char opbuf[OPERATION_BUFFER_SIZE];
2026         char ctxcsnbuf[LDAP_LUTIL_CSNSTR_BUFSIZE];
2027         Operation *op = (Operation *)opbuf;
2028         Entry *e;
2029         Attribute *a;
2030         int rc;
2031
2032         connection_fake_init( &conn, op, thrctx );
2033         op->o_bd = be;
2034         op->o_dn = be->be_rootdn;
2035         op->o_ndn = be->be_rootndn;
2036
2037         ctxcsnbuf[0] = '\0';
2038
2039         op->o_bd->bd_info = on->on_info->oi_orig;
2040         rc = be_entry_get_rw( op, be->be_nsuffix, NULL,
2041                 slap_schema.si_ad_contextCSN, 0, &e );
2042
2043         if ( e ) {
2044                 a = attr_find( e->e_attrs, slap_schema.si_ad_contextCSN );
2045                 if ( a ) {
2046                         si->si_ctxcsn.bv_len = a->a_nvals[0].bv_len;
2047                         if ( si->si_ctxcsn.bv_len >= sizeof(si->si_ctxcsnbuf ))
2048                                 si->si_ctxcsn.bv_len = sizeof(si->si_ctxcsnbuf)-1;
2049                         strncpy( si->si_ctxcsnbuf, a->a_nvals[0].bv_val,
2050                                 si->si_ctxcsn.bv_len );
2051                         si->si_ctxcsnbuf[si->si_ctxcsn.bv_len] = '\0';
2052                         strcpy( ctxcsnbuf, si->si_ctxcsnbuf );
2053                 }
2054                 be_entry_release_rw( op, e, 0 );
2055                 op->o_bd->bd_info = (BackendInfo *)on;
2056                 op->o_req_dn = be->be_suffix[0];
2057                 op->o_req_ndn = be->be_nsuffix[0];
2058                 op->ors_scope = LDAP_SCOPE_SUBTREE;
2059                 syncprov_findcsn( op, FIND_MAXCSN );
2060         }
2061
2062         if ( BER_BVISEMPTY( &si->si_ctxcsn ) ) {
2063                 slap_get_csn( op, si->si_ctxcsnbuf, sizeof(si->si_ctxcsnbuf),
2064                                 &si->si_ctxcsn, 0 );
2065         }
2066
2067         /* If our ctxcsn is different from what was read from the root
2068          * entry, write the new value out.
2069          */
2070         if ( strcmp( si->si_ctxcsnbuf, ctxcsnbuf )) {
2071                 SlapReply rs = {REP_RESULT};
2072                 syncprov_checkpoint( op, &rs, on );
2073         }
2074
2075         op->o_bd->bd_info = (BackendInfo *)on;
2076         return 0;
2077 }
2078
2079 /* Write the current contextCSN into the underlying db.
2080  */
2081 static int
2082 syncprov_db_close(
2083     BackendDB *be
2084 )
2085 {
2086     slap_overinst   *on = (slap_overinst *) be->bd_info;
2087     syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
2088         int i;
2089
2090         if ( si->si_numops ) {
2091                 Connection conn;
2092                 char opbuf[OPERATION_BUFFER_SIZE];
2093                 Operation *op = (Operation *)opbuf;
2094                 SlapReply rs = {REP_RESULT};
2095
2096                 connection_fake_init( &conn, op, thrctx );
2097                 op->o_bd = be;
2098                 op->o_dn = be->be_rootdn;
2099                 op->o_ndn = be->be_rootndn;
2100                 syncprov_checkpoint( op, &rs, on );
2101         }
2102         for ( i=0; thrctx[i].key; i++) {
2103                 if ( thrctx[i].xfree )
2104                         thrctx[i].xfree( thrctx[i].key, thrctx[i].data );
2105                 thrctx[i].key = NULL;
2106         }
2107
2108     return 0;
2109 }
2110
2111 static int
2112 syncprov_db_init(
2113         BackendDB *be
2114 )
2115 {
2116         slap_overinst   *on = (slap_overinst *)be->bd_info;
2117         syncprov_info_t *si;
2118
2119         si = ch_calloc(1, sizeof(syncprov_info_t));
2120         on->on_bi.bi_private = si;
2121         ldap_pvt_thread_mutex_init( &si->si_csn_mutex );
2122         ldap_pvt_thread_mutex_init( &si->si_ops_mutex );
2123         ldap_pvt_thread_mutex_init( &si->si_mods_mutex );
2124         si->si_ctxcsn.bv_val = si->si_ctxcsnbuf;
2125
2126         csn_anlist[0].an_desc = slap_schema.si_ad_entryCSN;
2127         csn_anlist[0].an_name = slap_schema.si_ad_entryCSN->ad_cname;
2128
2129         uuid_anlist[0].an_desc = slap_schema.si_ad_entryUUID;
2130         uuid_anlist[0].an_name = slap_schema.si_ad_entryUUID->ad_cname;
2131
2132         return 0;
2133 }
2134
2135 static int
2136 syncprov_db_destroy(
2137         BackendDB *be
2138 )
2139 {
2140         slap_overinst   *on = (slap_overinst *)be->bd_info;
2141         syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
2142
2143         if ( si ) {
2144                 ldap_pvt_thread_mutex_destroy( &si->si_mods_mutex );
2145                 ldap_pvt_thread_mutex_destroy( &si->si_ops_mutex );
2146                 ldap_pvt_thread_mutex_destroy( &si->si_csn_mutex );
2147                 ch_free( si );
2148         }
2149
2150         return 0;
2151 }
2152
2153 static int syncprov_parseCtrl (
2154         Operation *op,
2155         SlapReply *rs,
2156         LDAPControl *ctrl )
2157 {
2158         ber_tag_t tag;
2159         BerElement *ber;
2160         ber_int_t mode;
2161         ber_len_t len;
2162         struct berval cookie = BER_BVNULL;
2163         sync_control *sr;
2164         int rhint = 0;
2165
2166         if ( op->o_sync != SLAP_CONTROL_NONE ) {
2167                 rs->sr_text = "Sync control specified multiple times";
2168                 return LDAP_PROTOCOL_ERROR;
2169         }
2170
2171         if ( op->o_pagedresults != SLAP_CONTROL_NONE ) {
2172                 rs->sr_text = "Sync control specified with pagedResults control";
2173                 return LDAP_PROTOCOL_ERROR;
2174         }
2175
2176         if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
2177                 rs->sr_text = "Sync control value is empty (or absent)";
2178                 return LDAP_PROTOCOL_ERROR;
2179         }
2180
2181         /* Parse the control value
2182          *      syncRequestValue ::= SEQUENCE {
2183          *              mode   ENUMERATED {
2184          *                      -- 0 unused
2185          *                      refreshOnly             (1),
2186          *                      -- 2 reserved
2187          *                      refreshAndPersist       (3)
2188          *              },
2189          *              cookie  syncCookie OPTIONAL
2190          *      }
2191          */
2192
2193         ber = ber_init( &ctrl->ldctl_value );
2194         if( ber == NULL ) {
2195                 rs->sr_text = "internal error";
2196                 return LDAP_OTHER;
2197         }
2198
2199         if ( (tag = ber_scanf( ber, "{i" /*}*/, &mode )) == LBER_ERROR ) {
2200                 rs->sr_text = "Sync control : mode decoding error";
2201                 return LDAP_PROTOCOL_ERROR;
2202         }
2203
2204         switch( mode ) {
2205         case LDAP_SYNC_REFRESH_ONLY:
2206                 mode = SLAP_SYNC_REFRESH;
2207                 break;
2208         case LDAP_SYNC_REFRESH_AND_PERSIST:
2209                 mode = SLAP_SYNC_REFRESH_AND_PERSIST;
2210                 break;
2211         default:
2212                 rs->sr_text = "Sync control : unknown update mode";
2213                 return LDAP_PROTOCOL_ERROR;
2214         }
2215
2216         tag = ber_peek_tag( ber, &len );
2217
2218         if ( tag == LDAP_TAG_SYNC_COOKIE ) {
2219                 if (( ber_scanf( ber, /*{*/ "o", &cookie )) == LBER_ERROR ) {
2220                         rs->sr_text = "Sync control : cookie decoding error";
2221                         return LDAP_PROTOCOL_ERROR;
2222                 }
2223         }
2224         if ( tag == LDAP_TAG_RELOAD_HINT ) {
2225                 if (( ber_scanf( ber, /*{*/ "b", &rhint )) == LBER_ERROR ) {
2226                         rs->sr_text = "Sync control : rhint decoding error";
2227                         return LDAP_PROTOCOL_ERROR;
2228                 }
2229         }
2230         if (( ber_scanf( ber, /*{*/ "}")) == LBER_ERROR ) {
2231                         rs->sr_text = "Sync control : decoding error";
2232                         return LDAP_PROTOCOL_ERROR;
2233         }
2234         sr = op->o_tmpcalloc( 1, sizeof(struct sync_control), op->o_tmpmemctx );
2235         sr->sr_rhint = rhint;
2236         if (!BER_BVISNULL(&cookie)) {
2237                 ber_bvarray_add( &sr->sr_state.octet_str, &cookie );
2238                 slap_parse_sync_cookie( &sr->sr_state );
2239         }
2240
2241         op->o_controls[slap_cids.sc_LDAPsync] = sr;
2242
2243         (void) ber_free( ber, 1 );
2244
2245         op->o_sync = ctrl->ldctl_iscritical
2246                 ? SLAP_CONTROL_CRITICAL
2247                 : SLAP_CONTROL_NONCRITICAL;
2248
2249         op->o_sync_mode |= mode;        /* o_sync_mode shares o_sync */
2250
2251         return LDAP_SUCCESS;
2252 }
2253
2254 /* This overlay is set up for dynamic loading via moduleload. For static
2255  * configuration, you'll need to arrange for the slap_overinst to be
2256  * initialized and registered by some other function inside slapd.
2257  */
2258
2259 static slap_overinst            syncprov;
2260
2261 int
2262 syncprov_init()
2263 {
2264         int rc;
2265
2266         rc = register_supported_control( LDAP_CONTROL_SYNC,
2267                 SLAP_CTRL_HIDE|SLAP_CTRL_SEARCH, NULL,
2268                 syncprov_parseCtrl, &slap_cids.sc_LDAPsync );
2269         if ( rc != LDAP_SUCCESS ) {
2270                 fprintf( stderr, "Failed to register control %d\n", rc );
2271                 return rc;
2272         }
2273
2274         syncprov.on_bi.bi_type = "syncprov";
2275         syncprov.on_bi.bi_db_init = syncprov_db_init;
2276         syncprov.on_bi.bi_db_config = syncprov_db_config;
2277         syncprov.on_bi.bi_db_destroy = syncprov_db_destroy;
2278         syncprov.on_bi.bi_db_open = syncprov_db_open;
2279         syncprov.on_bi.bi_db_close = syncprov_db_close;
2280
2281         syncprov.on_bi.bi_op_abandon = syncprov_op_abandon;
2282         syncprov.on_bi.bi_op_cancel = syncprov_op_abandon;
2283
2284         syncprov.on_bi.bi_op_add = syncprov_op_mod;
2285         syncprov.on_bi.bi_op_compare = syncprov_op_compare;
2286         syncprov.on_bi.bi_op_delete = syncprov_op_mod;
2287         syncprov.on_bi.bi_op_modify = syncprov_op_mod;
2288         syncprov.on_bi.bi_op_modrdn = syncprov_op_mod;
2289         syncprov.on_bi.bi_op_search = syncprov_op_search;
2290         syncprov.on_bi.bi_extended = syncprov_op_extended;
2291         syncprov.on_bi.bi_operational = syncprov_operational;
2292
2293         return overlay_register( &syncprov );
2294 }
2295
2296 #if SLAPD_OVER_SYNCPROV == SLAPD_MOD_DYNAMIC
2297 int
2298 init_module( int argc, char *argv[] )
2299 {
2300         return syncprov_init();
2301 }
2302 #endif /* SLAPD_OVER_SYNCPROV == SLAPD_MOD_DYNAMIC */
2303
2304 #endif /* defined(SLAPD_OVER_SYNCPROV) */