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 2004-2007 The OpenLDAP Foundation.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted only as authorized by the OpenLDAP
  10  * Public License.
  11  *
  12  * A copy of this license is available in the file LICENSE in the
  13  * top-level directory of the distribution or, alternatively, at
  14  * <http://www.OpenLDAP.org/license.html>.
  15  */
  16 /* ACKNOWLEDGEMENTS:
  17  * This work was initially developed by Howard Chu for inclusion in
  18  * OpenLDAP Software.
  19  */
  20
  21 #include "portable.h"
  22
  23 #ifdef SLAPD_OVER_SYNCPROV
  24
  25 #include <ac/string.h>
  26 #include "lutil.h"
  27 #include "slap.h"
  28 #include "config.h"
  29 #include "ldap_rq.h"
  30
  31 /* A modify request on a particular entry */
  32 typedef struct modinst {
  33         struct modinst *mi_next;
  34         Operation *mi_op;
  35 } modinst;
  36
  37 typedef struct modtarget {
  38         struct modinst *mt_mods;
  39         struct modinst *mt_tail;
  40         Operation *mt_op;
  41         ldap_pvt_thread_mutex_t mt_mutex;
  42 } modtarget;
  43
  44 /* A queued result of a persistent search */
  45 typedef struct syncres {
  46         struct syncres *s_next;
  47         struct berval s_dn;
  48         struct berval s_ndn;
  49         struct berval s_uuid;
  50         struct berval s_csn;
  51         char s_mode;
  52         char s_isreference;
  53 } syncres;
  54
  55 /* Record of a persistent search */
  56 typedef struct syncops {
  57         struct syncops *s_next;
  58         struct berval   s_base;         /* ndn of search base */
  59         ID              s_eid;          /* entryID of search base */
  60         Operation       *s_op;          /* search op */
  61         int             s_rid;
  62         int             s_sid;
  63         struct berval s_filterstr;
  64         int             s_flags;        /* search status */
  65 #define PS_IS_REFRESHING        0x01
  66 #define PS_IS_DETACHED          0x02
  67 #define PS_WROTE_BASE           0x04
  68 #define PS_FIND_BASE            0x08
  69 #define PS_FIX_FILTER           0x10
  70
  71         int             s_inuse;        /* reference count */
  72         struct syncres *s_res;
  73         struct syncres *s_restail;
  74         struct re_s     *s_qtask;       /* task for playing psearch responses */
  75 #define RUNQ_INTERVAL   36000   /* a long time */
  76         ldap_pvt_thread_mutex_t s_mutex;
  77 } syncops;
  78
  79 /* A received sync control */
  80 typedef struct sync_control {
  81         struct sync_cookie sr_state;
  82         int sr_rhint;
  83 } sync_control;
  84
  85 #if 0 /* moved back to slap.h */
  86 #define o_sync  o_ctrlflag[slap_cids.sc_LDAPsync]
  87 #endif
  88 /* o_sync_mode uses data bits of o_sync */
  89 #define o_sync_mode     o_ctrlflag[slap_cids.sc_LDAPsync]
  90
  91 #define SLAP_SYNC_NONE                                  (LDAP_SYNC_NONE<<SLAP_CONTROL_SHIFT)
  92 #define SLAP_SYNC_REFRESH                               (LDAP_SYNC_REFRESH_ONLY<<SLAP_CONTROL_SHIFT)
  93 #define SLAP_SYNC_PERSIST                               (LDAP_SYNC_RESERVED<<SLAP_CONTROL_SHIFT)
  94 #define SLAP_SYNC_REFRESH_AND_PERSIST   (LDAP_SYNC_REFRESH_AND_PERSIST<<SLAP_CONTROL_SHIFT)
  95
  96 /* Record of which searches matched at premodify step */
  97 typedef struct syncmatches {
  98         struct syncmatches *sm_next;
  99         syncops *sm_op;
 100 } syncmatches;
 101
 102 /* Session log data */
 103 typedef struct slog_entry {
 104         struct slog_entry *se_next;
 105         struct berval se_uuid;
 106         struct berval se_csn;
 107         int     se_sid;
 108         ber_tag_t       se_tag;
 109 } slog_entry;
 110
 111 typedef struct sessionlog {
 112         struct berval   sl_mincsn;
 113         int             sl_num;
 114         int             sl_size;
 115         slog_entry *sl_head;
 116         slog_entry *sl_tail;
 117         ldap_pvt_thread_mutex_t sl_mutex;
 118 } sessionlog;
 119
 120 /* The main state for this overlay */
 121 typedef struct syncprov_info_t {
 122         syncops         *si_ops;
 123         BerVarray       si_ctxcsn;      /* ldapsync context */
 124         int             *si_sids;
 125         int             si_numcsns;
 126         int             si_chkops;      /* checkpointing info */
 127         int             si_chktime;
 128         int             si_numops;      /* number of ops since last checkpoint */
 129         int             si_nopres;      /* Skip present phase */
 130         int             si_usehint;     /* use reload hint */
 131         time_t  si_chklast;     /* time of last checkpoint */
 132         Avlnode *si_mods;       /* entries being modified */
 133         sessionlog      *si_logs;
 134         ldap_pvt_thread_rdwr_t  si_csn_rwlock;
 135         ldap_pvt_thread_mutex_t si_ops_mutex;
 136         ldap_pvt_thread_mutex_t si_mods_mutex;
 137 } syncprov_info_t;
 138
 139 typedef struct opcookie {
 140         slap_overinst *son;
 141         syncmatches *smatches;
 142         struct berval sdn;      /* DN of entry, for deletes */
 143         struct berval sndn;
 144         struct berval suuid;    /* UUID of entry */
 145         struct berval sctxcsn;
 146         int sreference; /* Is the entry a reference? */
 147 } opcookie;
 148
 149 typedef struct fbase_cookie {
 150         struct berval *fdn;     /* DN of a modified entry, for scope testing */
 151         syncops *fss;   /* persistent search we're testing against */
 152         int fbase;      /* if TRUE we found the search base and it's still valid */
 153         int fscope;     /* if TRUE then fdn is within the psearch scope */
 154 } fbase_cookie;
 155
 156 static AttributeName csn_anlist[3];
 157 static AttributeName uuid_anlist[2];
 158
 159 /* Build a LDAPsync intermediate state control */
 160 static int
 161 syncprov_state_ctrl(
 162         Operation       *op,
 163         SlapReply       *rs,
 164         Entry           *e,
 165         int             entry_sync_state,
 166         LDAPControl     **ctrls,
 167         int             num_ctrls,
 168         int             send_cookie,
 169         struct berval   *cookie )
 170 {
 171         Attribute* a;
 172         int ret;
 173
 174         BerElementBuffer berbuf;
 175         BerElement *ber = (BerElement *)&berbuf;
 176
 177         struct berval   entryuuid_bv = BER_BVNULL;
 178
 179         ber_init2( ber, 0, LBER_USE_DER );
 180         ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
 181
 182         ctrls[num_ctrls] = op->o_tmpalloc( sizeof ( LDAPControl ), op->o_tmpmemctx );
 183
 184         for ( a = e->e_attrs; a != NULL; a = a->a_next ) {
 185                 AttributeDescription *desc = a->a_desc;
 186                 if ( desc == slap_schema.si_ad_entryUUID ) {
 187                         entryuuid_bv = a->a_nvals[0];
 188                         break;
 189                 }
 190         }
 191
 192         /* FIXME: what if entryuuid is NULL or empty ? */
 193
 194         if ( send_cookie && cookie ) {
 195                 ber_printf( ber, "{eOON}",
 196                         entry_sync_state, &entryuuid_bv, cookie );
 197         } else {
 198                 ber_printf( ber, "{eON}",
 199                         entry_sync_state, &entryuuid_bv );
 200         }
 201
 202         ctrls[num_ctrls]->ldctl_oid = LDAP_CONTROL_SYNC_STATE;
 203         ctrls[num_ctrls]->ldctl_iscritical = (op->o_sync == SLAP_CONTROL_CRITICAL);
 204         ret = ber_flatten2( ber, &ctrls[num_ctrls]->ldctl_value, 1 );
 205
 206         ber_free_buf( ber );
 207
 208         if ( ret < 0 ) {
 209                 Debug( LDAP_DEBUG_TRACE,
 210                         "slap_build_sync_ctrl: ber_flatten2 failed\n",
 211                         0, 0, 0 );
 212                 send_ldap_error( op, rs, LDAP_OTHER, "internal error" );
 213                 return ret;
 214         }
 215
 216         return LDAP_SUCCESS;
 217 }
 218
 219 /* Build a LDAPsync final state control */
 220 static int
 221 syncprov_done_ctrl(
 222         Operation       *op,
 223         SlapReply       *rs,
 224         LDAPControl     **ctrls,
 225         int                     num_ctrls,
 226         int                     send_cookie,
 227         struct berval *cookie,
 228         int                     refreshDeletes )
 229 {
 230         int ret;
 231         BerElementBuffer berbuf;
 232         BerElement *ber = (BerElement *)&berbuf;
 233
 234         ber_init2( ber, NULL, LBER_USE_DER );
 235         ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
 236
 237         ctrls[num_ctrls] = op->o_tmpalloc( sizeof ( LDAPControl ), op->o_tmpmemctx );
 238
 239         ber_printf( ber, "{" );
 240         if ( send_cookie && cookie ) {
 241                 ber_printf( ber, "O", cookie );
 242         }
 243         if ( refreshDeletes == LDAP_SYNC_REFRESH_DELETES ) {
 244                 ber_printf( ber, "b", refreshDeletes );
 245         }
 246         ber_printf( ber, "N}" );
 247
 248         ctrls[num_ctrls]->ldctl_oid = LDAP_CONTROL_SYNC_DONE;
 249         ctrls[num_ctrls]->ldctl_iscritical = (op->o_sync == SLAP_CONTROL_CRITICAL);
 250         ret = ber_flatten2( ber, &ctrls[num_ctrls]->ldctl_value, 1 );
 251
 252         ber_free_buf( ber );
 253
 254         if ( ret < 0 ) {
 255                 Debug( LDAP_DEBUG_TRACE,
 256                         "syncprov_done_ctrl: ber_flatten2 failed\n",
 257                         0, 0, 0 );
 258                 send_ldap_error( op, rs, LDAP_OTHER, "internal error" );
 259                 return ret;
 260         }
 261
 262         return LDAP_SUCCESS;
 263 }
 264
 265 static int
 266 syncprov_sendinfo(
 267         Operation       *op,
 268         SlapReply       *rs,
 269         int                     type,
 270         struct berval *cookie,
 271         int                     refreshDone,
 272         BerVarray       syncUUIDs,
 273         int                     refreshDeletes )
 274 {
 275         BerElementBuffer berbuf;
 276         BerElement *ber = (BerElement *)&berbuf;
 277         struct berval rspdata;
 278
 279         int ret;
 280
 281         ber_init2( ber, NULL, LBER_USE_DER );
 282         ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
 283
 284         if ( type ) {
 285                 switch ( type ) {
 286                 case LDAP_TAG_SYNC_NEW_COOKIE:
 287                         ber_printf( ber, "tO", type, cookie );
 288                         break;
 289                 case LDAP_TAG_SYNC_REFRESH_DELETE:
 290                 case LDAP_TAG_SYNC_REFRESH_PRESENT:
 291                         ber_printf( ber, "t{", type );
 292                         if ( cookie ) {
 293                                 ber_printf( ber, "O", cookie );
 294                         }
 295                         if ( refreshDone == 0 ) {
 296                                 ber_printf( ber, "b", refreshDone );
 297                         }
 298                         ber_printf( ber, "N}" );
 299                         break;
 300                 case LDAP_TAG_SYNC_ID_SET:
 301                         ber_printf( ber, "t{", type );
 302                         if ( cookie ) {
 303                                 ber_printf( ber, "O", cookie );
 304                         }
 305                         if ( refreshDeletes == 1 ) {
 306                                 ber_printf( ber, "b", refreshDeletes );
 307                         }
 308                         ber_printf( ber, "[W]", syncUUIDs );
 309                         ber_printf( ber, "N}" );
 310                         break;
 311                 default:
 312                         Debug( LDAP_DEBUG_TRACE,
 313                                 "syncprov_sendinfo: invalid syncinfo type (%d)\n",
 314                                 type, 0, 0 );
 315                         return LDAP_OTHER;
 316                 }
 317         }
 318
 319         ret = ber_flatten2( ber, &rspdata, 0 );
 320
 321         if ( ret < 0 ) {
 322                 Debug( LDAP_DEBUG_TRACE,
 323                         "syncprov_sendinfo: ber_flatten2 failed\n",
 324                         0, 0, 0 );
 325                 send_ldap_error( op, rs, LDAP_OTHER, "internal error" );
 326                 return ret;
 327         }
 328
 329         rs->sr_rspoid = LDAP_SYNC_INFO;
 330         rs->sr_rspdata = &rspdata;
 331         send_ldap_intermediate( op, rs );
 332         rs->sr_rspdata = NULL;
 333         ber_free_buf( ber );
 334
 335         return LDAP_SUCCESS;
 336 }
 337
 338 /* Find a modtarget in an AVL tree */
 339 static int
 340 sp_avl_cmp( const void *c1, const void *c2 )
 341 {
 342         const modtarget *m1, *m2;
 343         int rc;
 344
 345         m1 = c1; m2 = c2;
 346         rc = m1->mt_op->o_req_ndn.bv_len - m2->mt_op->o_req_ndn.bv_len;
 347
 348         if ( rc ) return rc;
 349         return ber_bvcmp( &m1->mt_op->o_req_ndn, &m2->mt_op->o_req_ndn );
 350 }
 351
 352 /* syncprov_findbase:
 353  *   finds the true DN of the base of a search (with alias dereferencing) and
 354  * checks to make sure the base entry doesn't get replaced with a different
 355  * entry (e.g., swapping trees via ModDN, or retargeting an alias). If a
 356  * change is detected, any persistent search on this base must be terminated /
 357  * reloaded.
 358  *   On the first call, we just save the DN and entryID. On subsequent calls
 359  * we compare the DN and entryID with the saved values.
 360  */
 361 static int
 362 findbase_cb( Operation *op, SlapReply *rs )
 363 {
 364         slap_callback *sc = op->o_callback;
 365
 366         if ( rs->sr_type == REP_SEARCH && rs->sr_err == LDAP_SUCCESS ) {
 367                 fbase_cookie *fc = sc->sc_private;
 368
 369                 /* If no entryID, we're looking for the first time.
 370                  * Just store whatever we got.
 371                  */
 372                 if ( fc->fss->s_eid == NOID ) {
 373                         fc->fbase = 2;
 374                         fc->fss->s_eid = rs->sr_entry->e_id;
 375                         ber_dupbv( &fc->fss->s_base, &rs->sr_entry->e_nname );
 376
 377                 } else if ( rs->sr_entry->e_id == fc->fss->s_eid &&
 378                         dn_match( &rs->sr_entry->e_nname, &fc->fss->s_base )) {
 379
 380                 /* OK, the DN is the same and the entryID is the same. */
 381                         fc->fbase = 1;
 382                 }
 383         }
 384         if ( rs->sr_err != LDAP_SUCCESS ) {
 385                 Debug( LDAP_DEBUG_ANY, "findbase failed! %d\n", rs->sr_err,0,0 );
 386         }
 387         return LDAP_SUCCESS;
 388 }
 389
 390 static Filter generic_filter = { LDAP_FILTER_PRESENT, { 0 }, NULL };
 391 static struct berval generic_filterstr = BER_BVC("(objectclass=*)");
 392
 393 static int
 394 syncprov_findbase( Operation *op, fbase_cookie *fc )
 395 {
 396         opcookie *opc = op->o_callback->sc_private;
 397         slap_overinst *on = opc->son;
 398
 399         /* Use basic parameters from syncrepl search, but use
 400          * current op's threadctx / tmpmemctx
 401          */
 402         ldap_pvt_thread_mutex_lock( &fc->fss->s_mutex );
 403         if ( fc->fss->s_flags & PS_FIND_BASE ) {
 404                 slap_callback cb = {0};
 405                 Operation fop;
 406                 SlapReply frs = { REP_RESULT };
 407                 BackendInfo *bi;
 408                 int rc;
 409
 410                 fc->fss->s_flags ^= PS_FIND_BASE;
 411                 ldap_pvt_thread_mutex_unlock( &fc->fss->s_mutex );
 412
 413                 fop = *fc->fss->s_op;
 414
 415                 fop.o_hdr = op->o_hdr;
 416                 fop.o_bd = op->o_bd;
 417                 fop.o_time = op->o_time;
 418                 fop.o_tincr = op->o_tincr;
 419                 bi = op->o_bd->bd_info;
 420
 421                 cb.sc_response = findbase_cb;
 422                 cb.sc_private = fc;
 423
 424                 fop.o_sync_mode = 0;    /* turn off sync mode */
 425                 fop.o_managedsait = SLAP_CONTROL_CRITICAL;
 426                 fop.o_callback = &cb;
 427                 fop.o_tag = LDAP_REQ_SEARCH;
 428                 fop.ors_scope = LDAP_SCOPE_BASE;
 429                 fop.ors_limit = NULL;
 430                 fop.ors_slimit = 1;
 431                 fop.ors_tlimit = SLAP_NO_LIMIT;
 432                 fop.ors_attrs = slap_anlist_no_attrs;
 433                 fop.ors_attrsonly = 1;
 434                 fop.ors_filter = &generic_filter;
 435                 fop.ors_filterstr = generic_filterstr;
 436
 437                 rc = overlay_op_walk( &fop, &frs, op_search, on->on_info, on );
 438                 op->o_bd->bd_info = bi;
 439         } else {
 440                 ldap_pvt_thread_mutex_unlock( &fc->fss->s_mutex );
 441                 fc->fbase = 1;
 442         }
 443
 444         /* After the first call, see if the fdn resides in the scope */
 445         if ( fc->fbase == 1 ) {
 446                 switch ( fc->fss->s_op->ors_scope ) {
 447                 case LDAP_SCOPE_BASE:
 448                         fc->fscope = dn_match( fc->fdn, &fc->fss->s_base );
 449                         break;
 450                 case LDAP_SCOPE_ONELEVEL: {
 451                         struct berval pdn;
 452                         dnParent( fc->fdn, &pdn );
 453                         fc->fscope = dn_match( &pdn, &fc->fss->s_base );
 454                         break; }
 455                 case LDAP_SCOPE_SUBTREE:
 456                         fc->fscope = dnIsSuffix( fc->fdn, &fc->fss->s_base );
 457                         break;
 458                 case LDAP_SCOPE_SUBORDINATE:
 459                         fc->fscope = dnIsSuffix( fc->fdn, &fc->fss->s_base ) &&
 460                                 !dn_match( fc->fdn, &fc->fss->s_base );
 461                         break;
 462                 }
 463         }
 464
 465         if ( fc->fbase )
 466                 return LDAP_SUCCESS;
 467
 468         /* If entryID has changed, then the base of this search has
 469          * changed. Invalidate the psearch.
 470          */
 471         return LDAP_NO_SUCH_OBJECT;
 472 }
 473
 474 /* syncprov_findcsn:
 475  *   This function has three different purposes, but they all use a search
 476  * that filters on entryCSN so they're combined here.
 477  * 1: at startup time, after a contextCSN has been read from the database,
 478  * we search for all entries with CSN >= contextCSN in case the contextCSN
 479  * was not checkpointed at the previous shutdown.
 480  *
 481  * 2: when the current contextCSN is known and we have a sync cookie, we search
 482  * for one entry with CSN = the cookie CSN. If not found, try <= cookie CSN.
 483  * If an entry is found, the cookie CSN is valid, otherwise it is stale.
 484  *
 485  * 3: during a refresh phase, we search for all entries with CSN <= the cookie
 486  * CSN, and generate Present records for them. We always collect this result
 487  * in SyncID sets, even if there's only one match.
 488  */
 489 typedef enum find_csn_t {
 490         FIND_MAXCSN     = 1,
 491         FIND_CSN        = 2,
 492         FIND_PRESENT    = 3
 493 } find_csn_t;
 494
 495 static int
 496 findmax_cb( Operation *op, SlapReply *rs )
 497 {
 498         if ( rs->sr_type == REP_SEARCH && rs->sr_err == LDAP_SUCCESS ) {
 499                 struct berval *maxcsn = op->o_callback->sc_private;
 500                 Attribute *a = attr_find( rs->sr_entry->e_attrs,
 501                         slap_schema.si_ad_entryCSN );
 502
 503                 if ( a && ber_bvcmp( &a->a_vals[0], maxcsn ) > 0 ) {
 504                         maxcsn->bv_len = a->a_vals[0].bv_len;
 505                         strcpy( maxcsn->bv_val, a->a_vals[0].bv_val );
 506                 }
 507         }
 508         return LDAP_SUCCESS;
 509 }
 510
 511 static int
 512 findcsn_cb( Operation *op, SlapReply *rs )
 513 {
 514         slap_callback *sc = op->o_callback;
 515
 516         /* We just want to know that at least one exists, so it's OK if
 517          * we exceed the unchecked limit.
 518          */
 519         if ( rs->sr_err == LDAP_ADMINLIMIT_EXCEEDED ||
 520                 (rs->sr_type == REP_SEARCH && rs->sr_err == LDAP_SUCCESS )) {
 521                 sc->sc_private = (void *)1;
 522         }
 523         return LDAP_SUCCESS;
 524 }
 525
 526 /* Build a list of entryUUIDs for sending in a SyncID set */
 527
 528 #define UUID_LEN        16
 529
 530 typedef struct fpres_cookie {
 531         int num;
 532         BerVarray uuids;
 533         char *last;
 534 } fpres_cookie;
 535
 536 static int
 537 findpres_cb( Operation *op, SlapReply *rs )
 538 {
 539         slap_callback *sc = op->o_callback;
 540         fpres_cookie *pc = sc->sc_private;
 541         Attribute *a;
 542         int ret = SLAP_CB_CONTINUE;
 543
 544         switch ( rs->sr_type ) {
 545         case REP_SEARCH:
 546                 a = attr_find( rs->sr_entry->e_attrs, slap_schema.si_ad_entryUUID );
 547                 if ( a ) {
 548                         pc->uuids[pc->num].bv_val = pc->last;
 549                         AC_MEMCPY( pc->uuids[pc->num].bv_val, a->a_nvals[0].bv_val,
 550                                 pc->uuids[pc->num].bv_len );
 551                         pc->num++;
 552                         pc->last = pc->uuids[pc->num].bv_val;
 553                         pc->uuids[pc->num].bv_val = NULL;
 554                 }
 555                 ret = LDAP_SUCCESS;
 556                 if ( pc->num != SLAP_SYNCUUID_SET_SIZE )
 557                         break;
 558                 /* FALLTHRU */
 559         case REP_RESULT:
 560                 ret = rs->sr_err;
 561                 if ( pc->num ) {
 562                         ret = syncprov_sendinfo( op, rs, LDAP_TAG_SYNC_ID_SET, NULL,
 563                                 0, pc->uuids, 0 );
 564                         pc->uuids[pc->num].bv_val = pc->last;
 565                         pc->num = 0;
 566                         pc->last = pc->uuids[0].bv_val;
 567                 }
 568                 break;
 569         default:
 570                 break;
 571         }
 572         return ret;
 573 }
 574
 575 static int
 576 syncprov_findcsn( Operation *op, find_csn_t mode )
 577 {
 578         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
 579         syncprov_info_t         *si = on->on_bi.bi_private;
 580
 581         slap_callback cb = {0};
 582         Operation fop;
 583         SlapReply frs = { REP_RESULT };
 584         char buf[LDAP_LUTIL_CSNSTR_BUFSIZE + STRLENOF("(entryCSN<=)")];
 585         char cbuf[LDAP_LUTIL_CSNSTR_BUFSIZE];
 586         struct berval maxcsn;
 587         Filter cf;
 588         AttributeAssertion eq = ATTRIBUTEASSERTION_INIT;
 589         fpres_cookie pcookie;
 590         sync_control *srs = NULL;
 591         struct slap_limits_set fc_limits;
 592         int i, rc = LDAP_SUCCESS, findcsn_retry = 1;
 593         int maxid = 0;
 594
 595         if ( mode != FIND_MAXCSN ) {
 596                 srs = op->o_controls[slap_cids.sc_LDAPsync];
 597         }
 598
 599         fop = *op;
 600         fop.o_sync_mode &= SLAP_CONTROL_MASK;   /* turn off sync_mode */
 601         /* We want pure entries, not referrals */
 602         fop.o_managedsait = SLAP_CONTROL_CRITICAL;
 603
 604         cf.f_ava = &eq;
 605         cf.f_av_desc = slap_schema.si_ad_entryCSN;
 606         BER_BVZERO( &cf.f_av_value );
 607         cf.f_next = NULL;
 608
 609         fop.o_callback = &cb;
 610         fop.ors_limit = NULL;
 611         fop.ors_tlimit = SLAP_NO_LIMIT;
 612         fop.ors_filter = &cf;
 613         fop.ors_filterstr.bv_val = buf;
 614
 615 again:
 616         switch( mode ) {
 617         case FIND_MAXCSN:
 618                 cf.f_choice = LDAP_FILTER_GE;
 619                 cf.f_av_value = si->si_ctxcsn[0];
 620                 /* If there are multiple CSNs, use the largest */
 621                 for ( i=1; i<si->si_numcsns; i++) {
 622                         if ( ber_bvcmp( &cf.f_av_value, &si->si_ctxcsn[i] ) < 0 ) {
 623                                 cf.f_av_value = si->si_ctxcsn[i];
 624                                 maxid = i;
 625                         }
 626                 }
 627                 fop.ors_filterstr.bv_len = sprintf( buf, "(entryCSN>=%s)",
 628                         cf.f_av_value.bv_val );
 629                 fop.ors_attrsonly = 0;
 630                 fop.ors_attrs = csn_anlist;
 631                 fop.ors_slimit = SLAP_NO_LIMIT;
 632                 cb.sc_private = &maxcsn;
 633                 cb.sc_response = findmax_cb;
 634                 strcpy( cbuf, cf.f_av_value.bv_val );
 635                 maxcsn.bv_val = cbuf;
 636                 maxcsn.bv_len = cf.f_av_value.bv_len;
 637                 break;
 638         case FIND_CSN:
 639                 if ( BER_BVISEMPTY( &cf.f_av_value )) {
 640                         cf.f_av_value = srs->sr_state.ctxcsn[0];
 641                         /* If there are multiple CSNs, use the smallest */
 642                         for ( i=1; i<srs->sr_state.numcsns; i++ ) {
 643                                 if ( ber_bvcmp( &cf.f_av_value, &srs->sr_state.ctxcsn[i] )
 644                                         > 0 ) {
 645                                         cf.f_av_value = srs->sr_state.ctxcsn[i];
 646                                 }
 647                         }
 648                 }
 649                 /* Look for exact match the first time */
 650                 if ( findcsn_retry ) {
 651                         cf.f_choice = LDAP_FILTER_EQUALITY;
 652                         fop.ors_filterstr.bv_len = sprintf( buf, "(entryCSN=%s)",
 653                                 cf.f_av_value.bv_val );
 654                 /* On retry, look for <= */
 655                 } else {
 656                         cf.f_choice = LDAP_FILTER_LE;
 657                         fop.ors_limit = &fc_limits;
 658                         memset( &fc_limits, 0, sizeof( fc_limits ));
 659                         fc_limits.lms_s_unchecked = 1;
 660                         fop.ors_filterstr.bv_len = sprintf( buf, "(entryCSN<=%s)",
 661                                 cf.f_av_value.bv_val );
 662                 }
 663                 fop.ors_attrsonly = 1;
 664                 fop.ors_attrs = slap_anlist_no_attrs;
 665                 fop.ors_slimit = 1;
 666                 cb.sc_private = NULL;
 667                 cb.sc_response = findcsn_cb;
 668                 break;
 669         case FIND_PRESENT:
 670                 fop.ors_filter = op->ors_filter;
 671                 fop.ors_filterstr = op->ors_filterstr;
 672                 fop.ors_attrsonly = 0;
 673                 fop.ors_attrs = uuid_anlist;
 674                 fop.ors_slimit = SLAP_NO_LIMIT;
 675                 cb.sc_private = &pcookie;
 676                 cb.sc_response = findpres_cb;
 677                 pcookie.num = 0;
 678
 679                 /* preallocate storage for a full set */
 680                 pcookie.uuids = op->o_tmpalloc( (SLAP_SYNCUUID_SET_SIZE+1) *
 681                         sizeof(struct berval) + SLAP_SYNCUUID_SET_SIZE * UUID_LEN,
 682                         op->o_tmpmemctx );
 683                 pcookie.last = (char *)(pcookie.uuids + SLAP_SYNCUUID_SET_SIZE+1);
 684                 pcookie.uuids[0].bv_val = pcookie.last;
 685                 pcookie.uuids[0].bv_len = UUID_LEN;
 686                 for (i=1; i<SLAP_SYNCUUID_SET_SIZE; i++) {
 687                         pcookie.uuids[i].bv_val = pcookie.uuids[i-1].bv_val + UUID_LEN;
 688                         pcookie.uuids[i].bv_len = UUID_LEN;
 689                 }
 690                 break;
 691         }
 692
 693         fop.o_bd->bd_info = on->on_info->oi_orig;
 694         fop.o_bd->be_search( &fop, &frs );
 695         fop.o_bd->bd_info = (BackendInfo *)on;
 696
 697         switch( mode ) {
 698         case FIND_MAXCSN:
 699                 if ( ber_bvcmp( &si->si_ctxcsn[maxid], &maxcsn )) {
 700                         ber_bvreplace( &si->si_ctxcsn[maxid], &maxcsn );
 701                         si->si_numops++;        /* ensure a checkpoint */
 702                 }
 703                 break;
 704         case FIND_CSN:
 705                 /* If matching CSN was not found, invalidate the context. */
 706                 if ( !cb.sc_private ) {
 707                         /* If we didn't find an exact match, then try for <= */
 708                         if ( findcsn_retry ) {
 709                                 findcsn_retry = 0;
 710                                 goto again;
 711                         }
 712                         rc = LDAP_NO_SUCH_OBJECT;
 713                 }
 714                 break;
 715         case FIND_PRESENT:
 716                 op->o_tmpfree( pcookie.uuids, op->o_tmpmemctx );
 717                 break;
 718         }
 719
 720         return rc;
 721 }
 722
 723 static void
 724 syncprov_free_syncop( syncops *so )
 725 {
 726         syncres *sr, *srnext;
 727         GroupAssertion *ga, *gnext;
 728
 729         ldap_pvt_thread_mutex_lock( &so->s_mutex );
 730         if ( --so->s_inuse > 0 ) {
 731                 ldap_pvt_thread_mutex_unlock( &so->s_mutex );
 732                 return;
 733         }
 734         ldap_pvt_thread_mutex_unlock( &so->s_mutex );
 735         if ( so->s_flags & PS_IS_DETACHED ) {
 736                 filter_free( so->s_op->ors_filter );
 737                 for ( ga = so->s_op->o_groups; ga; ga=gnext ) {
 738                         gnext = ga->ga_next;
 739                         ch_free( ga );
 740                 }
 741                 ch_free( so->s_op );
 742         }
 743         ch_free( so->s_base.bv_val );
 744         for ( sr=so->s_res; sr; sr=srnext ) {
 745                 srnext = sr->s_next;
 746                 ch_free( sr );
 747         }
 748         ldap_pvt_thread_mutex_destroy( &so->s_mutex );
 749         ch_free( so );
 750 }
 751
 752 /* Send a persistent search response */
 753 static int
 754 syncprov_sendresp( Operation *op, opcookie *opc, syncops *so,
 755         Entry **e, int mode )
 756 {
 757         slap_overinst *on = opc->son;
 758
 759         SlapReply rs = { REP_SEARCH };
 760         LDAPControl *ctrls[2];
 761         struct berval cookie, csns[2];
 762         Entry e_uuid = {0};
 763         Attribute a_uuid = {0};
 764
 765         if ( so->s_op->o_abandon )
 766                 return SLAPD_ABANDON;
 767
 768         ctrls[1] = NULL;
 769         csns[0] = opc->sctxcsn;
 770         BER_BVZERO( &csns[1] );
 771         slap_compose_sync_cookie( op, &cookie, csns, so->s_rid, so->s_sid );
 772
 773         e_uuid.e_attrs = &a_uuid;
 774         a_uuid.a_desc = slap_schema.si_ad_entryUUID;
 775         a_uuid.a_nvals = &opc->suuid;
 776         rs.sr_err = syncprov_state_ctrl( op, &rs, &e_uuid,
 777                 mode, ctrls, 0, 1, &cookie );
 778         op->o_tmpfree( cookie.bv_val, op->o_tmpmemctx );
 779
 780         rs.sr_ctrls = ctrls;
 781         op->o_bd->bd_info = (BackendInfo *)on->on_info;
 782         switch( mode ) {
 783         case LDAP_SYNC_ADD:
 784                 rs.sr_entry = *e;
 785                 if ( rs.sr_entry->e_private )
 786                         rs.sr_flags = REP_ENTRY_MUSTRELEASE;
 787                 if ( opc->sreference ) {
 788                         rs.sr_ref = get_entry_referrals( op, rs.sr_entry );
 789                         rs.sr_err = send_search_reference( op, &rs );
 790                         ber_bvarray_free( rs.sr_ref );
 791                         if ( !rs.sr_entry )
 792                                 *e = NULL;
 793                         break;
 794                 }
 795                 /* fallthru */
 796         case LDAP_SYNC_MODIFY:
 797                 rs.sr_entry = *e;
 798                 if ( rs.sr_entry->e_private )
 799                         rs.sr_flags = REP_ENTRY_MUSTRELEASE;
 800                 rs.sr_attrs = op->ors_attrs;
 801                 rs.sr_err = send_search_entry( op, &rs );
 802                 if ( !rs.sr_entry )
 803                         *e = NULL;
 804                 break;
 805         case LDAP_SYNC_DELETE:
 806                 e_uuid.e_attrs = NULL;
 807                 e_uuid.e_name = opc->sdn;
 808                 e_uuid.e_nname = opc->sndn;
 809                 rs.sr_entry = &e_uuid;
 810                 if ( opc->sreference ) {
 811                         struct berval bv = BER_BVNULL;
 812                         rs.sr_ref = &bv;
 813                         rs.sr_err = send_search_reference( op, &rs );
 814                 } else {
 815                         rs.sr_err = send_search_entry( op, &rs );
 816                 }
 817                 break;
 818         default:
 819                 assert(0);
 820         }
 821         /* In case someone else freed it already? */
 822         if ( rs.sr_ctrls ) {
 823                 op->o_tmpfree( rs.sr_ctrls[0], op->o_tmpmemctx );
 824                 rs.sr_ctrls = NULL;
 825         }
 826
 827         return rs.sr_err;
 828 }
 829
 830 /* Play back queued responses */
 831 static int
 832 syncprov_qplay( Operation *op, slap_overinst *on, syncops *so )
 833 {
 834         syncres *sr;
 835         Entry *e;
 836         opcookie opc;
 837         int rc = 0;
 838
 839         opc.son = on;
 840
 841         for (;;) {
 842                 ldap_pvt_thread_mutex_lock( &so->s_mutex );
 843                 sr = so->s_res;
 844                 if ( sr )
 845                         so->s_res = sr->s_next;
 846                 if ( !so->s_res )
 847                         so->s_restail = NULL;
 848                 ldap_pvt_thread_mutex_unlock( &so->s_mutex );
 849
 850                 if ( !sr || so->s_op->o_abandon )
 851                         break;
 852
 853                 opc.sdn = sr->s_dn;
 854                 opc.sndn = sr->s_ndn;
 855                 opc.suuid = sr->s_uuid;
 856                 opc.sctxcsn = sr->s_csn;
 857                 opc.sreference = sr->s_isreference;
 858                 e = NULL;
 859
 860                 if ( sr->s_mode != LDAP_SYNC_DELETE ) {
 861                         rc = overlay_entry_get_ov( op, &opc.sndn, NULL, NULL, 0, &e, on );
 862                         if ( rc ) {
 863                                 Debug( LDAP_DEBUG_SYNC, "syncprov_qplay: failed to get %s, "
 864                                         "error (%d), ignoring...\n", opc.sndn.bv_val, rc, 0 );
 865                                 ch_free( sr );
 866                                 rc = 0;
 867                                 continue;
 868                         }
 869                 }
 870                 rc = syncprov_sendresp( op, &opc, so, &e, sr->s_mode );
 871
 872                 if ( e ) {
 873                         overlay_entry_release_ov( op, e, 0, on );
 874                 }
 875
 876                 ch_free( sr );
 877
 878                 if ( rc )
 879                         break;
 880         }
 881         return rc;
 882 }
 883
 884 /* runqueue task for playing back queued responses */
 885 static void *
 886 syncprov_qtask( void *ctx, void *arg )
 887 {
 888         struct re_s *rtask = arg;
 889         syncops *so = rtask->arg;
 890         slap_overinst *on = so->s_op->o_private;
 891         OperationBuffer opbuf;
 892         Operation *op;
 893         BackendDB be;
 894         int rc;
 895
 896         op = &opbuf.ob_op;
 897         *op = *so->s_op;
 898         op->o_hdr = &opbuf.ob_hdr;
 899         op->o_controls = opbuf.ob_controls;
 900         memset( op->o_controls, 0, sizeof(opbuf.ob_controls) );
 901
 902         *op->o_hdr = *so->s_op->o_hdr;
 903
 904         op->o_tmpmemctx = slap_sl_mem_create(SLAP_SLAB_SIZE, SLAP_SLAB_STACK, ctx, 1);
 905         op->o_tmpmfuncs = &slap_sl_mfuncs;
 906         op->o_threadctx = ctx;
 907
 908         /* syncprov_qplay expects a fake db */
 909         be = *so->s_op->o_bd;
 910         be.be_flags |= SLAP_DBFLAG_OVERLAY;
 911         op->o_bd = &be;
 912         op->o_private = NULL;
 913         op->o_callback = NULL;
 914
 915         rc = syncprov_qplay( op, on, so );
 916
 917         /* decrement use count... */
 918         syncprov_free_syncop( so );
 919
 920         /* wait until we get explicitly scheduled again */
 921         ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
 922         ldap_pvt_runqueue_stoptask( &slapd_rq, rtask );
 923         if ( rc == 0 ) {
 924                 ldap_pvt_runqueue_resched( &slapd_rq, rtask, 1 );
 925         } else {
 926                 /* bail out on any error */
 927                 ldap_pvt_runqueue_remove( &slapd_rq, rtask );
 928         }
 929         ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
 930
 931 #if 0   /* FIXME: connection_close isn't exported from slapd.
 932                  * should it be?
 933                  */
 934         if ( rc ) {
 935                 ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
 936                 if ( connection_state_closing( op->o_conn )) {
 937                         connection_close( op->o_conn );
 938                 }
 939                 ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
 940         }
 941 #endif
 942         return NULL;
 943 }
 944
 945 /* Start the task to play back queued psearch responses */
 946 static void
 947 syncprov_qstart( syncops *so )
 948 {
 949         int wake=0;
 950         ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
 951         if ( !so->s_qtask ) {
 952                 so->s_qtask = ldap_pvt_runqueue_insert( &slapd_rq, RUNQ_INTERVAL,
 953                         syncprov_qtask, so, "syncprov_qtask",
 954                         so->s_op->o_conn->c_peer_name.bv_val );
 955                 ++so->s_inuse;
 956                 wake = 1;
 957         } else {
 958                 if (!ldap_pvt_runqueue_isrunning( &slapd_rq, so->s_qtask ) &&
 959                         !so->s_qtask->next_sched.tv_sec ) {
 960                         so->s_qtask->interval.tv_sec = 0;
 961                         ldap_pvt_runqueue_resched( &slapd_rq, so->s_qtask, 0 );
 962                         so->s_qtask->interval.tv_sec = RUNQ_INTERVAL;
 963                         ++so->s_inuse;
 964                         wake = 1;
 965                 }
 966         }
 967         ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
 968         if ( wake )
 969                 slap_wake_listener();
 970 }
 971
 972 /* Queue a persistent search response */
 973 static int
 974 syncprov_qresp( opcookie *opc, syncops *so, int mode )
 975 {
 976         syncres *sr;
 977         int sid;
 978
 979         /* Don't send changes back to their originator */
 980         sid = slap_parse_csn_sid( &opc->sctxcsn );
 981         if ( sid >= 0 && sid == so->s_sid )
 982                 return LDAP_SUCCESS;
 983
 984         sr = ch_malloc(sizeof(syncres) + opc->suuid.bv_len + 1 +
 985                 opc->sdn.bv_len + 1 + opc->sndn.bv_len + 1 + opc->sctxcsn.bv_len + 1 );
 986         sr->s_next = NULL;
 987         sr->s_dn.bv_val = (char *)(sr + 1);
 988         sr->s_dn.bv_len = opc->sdn.bv_len;
 989         sr->s_mode = mode;
 990         sr->s_isreference = opc->sreference;
 991         sr->s_ndn.bv_val = lutil_strcopy( sr->s_dn.bv_val,
 992                  opc->sdn.bv_val ) + 1;
 993         sr->s_ndn.bv_len = opc->sndn.bv_len;
 994         sr->s_uuid.bv_val = lutil_strcopy( sr->s_ndn.bv_val,
 995                  opc->sndn.bv_val ) + 1;
 996         sr->s_uuid.bv_len = opc->suuid.bv_len;
 997         AC_MEMCPY( sr->s_uuid.bv_val, opc->suuid.bv_val, opc->suuid.bv_len );
 998         sr->s_csn.bv_val = sr->s_uuid.bv_val + sr->s_uuid.bv_len + 1;
 999         sr->s_csn.bv_len = opc->sctxcsn.bv_len;
1000         strcpy( sr->s_csn.bv_val, opc->sctxcsn.bv_val );
1001
1002         ldap_pvt_thread_mutex_lock( &so->s_mutex );
1003         if ( !so->s_res ) {
1004                 so->s_res = sr;
1005         } else {
1006                 so->s_restail->s_next = sr;
1007         }
1008         so->s_restail = sr;
1009
1010         /* If the base of the psearch was modified, check it next time round */
1011         if ( so->s_flags & PS_WROTE_BASE ) {
1012                 so->s_flags ^= PS_WROTE_BASE;
1013                 so->s_flags |= PS_FIND_BASE;
1014         }
1015         if ( so->s_flags & PS_IS_DETACHED ) {
1016                 syncprov_qstart( so );
1017         }
1018         ldap_pvt_thread_mutex_unlock( &so->s_mutex );
1019         return LDAP_SUCCESS;
1020 }
1021
1022 static int
1023 syncprov_drop_psearch( syncops *so, int lock )
1024 {
1025         if ( so->s_flags & PS_IS_DETACHED ) {
1026                 if ( lock )
1027                         ldap_pvt_thread_mutex_lock( &so->s_op->o_conn->c_mutex );
1028                 so->s_op->o_conn->c_n_ops_executing--;
1029                 so->s_op->o_conn->c_n_ops_completed++;
1030                 LDAP_STAILQ_REMOVE( &so->s_op->o_conn->c_ops, so->s_op, Operation,
1031                         o_next );
1032                 if ( lock )
1033                         ldap_pvt_thread_mutex_unlock( &so->s_op->o_conn->c_mutex );
1034         }
1035         syncprov_free_syncop( so );
1036
1037         return 0;
1038 }
1039
1040 static int
1041 syncprov_ab_cleanup( Operation *op, SlapReply *rs )
1042 {
1043         slap_callback *sc = op->o_callback;
1044         op->o_callback = sc->sc_next;
1045         syncprov_drop_psearch( op->o_callback->sc_private, 0 );
1046         op->o_tmpfree( sc, op->o_tmpmemctx );
1047         return 0;
1048 }
1049
1050 static int
1051 syncprov_op_abandon( Operation *op, SlapReply *rs )
1052 {
1053         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
1054         syncprov_info_t         *si = on->on_bi.bi_private;
1055         syncops *so, *soprev;
1056
1057         ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
1058         for ( so=si->si_ops, soprev = (syncops *)&si->si_ops; so;
1059                 soprev=so, so=so->s_next ) {
1060                 if ( so->s_op->o_connid == op->o_connid &&
1061                         so->s_op->o_msgid == op->orn_msgid ) {
1062                                 so->s_op->o_abandon = 1;
1063                                 soprev->s_next = so->s_next;
1064                                 break;
1065                 }
1066         }
1067         ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
1068         if ( so ) {
1069                 /* Is this really a Cancel exop? */
1070                 if ( op->o_tag != LDAP_REQ_ABANDON ) {
1071                         so->s_op->o_cancel = SLAP_CANCEL_ACK;
1072                         rs->sr_err = LDAP_CANCELLED;
1073                         send_ldap_result( so->s_op, rs );
1074                         if ( so->s_flags & PS_IS_DETACHED ) {
1075                                 slap_callback *cb;
1076                                 cb = op->o_tmpcalloc( 1, sizeof(slap_callback), op->o_tmpmemctx );
1077                                 cb->sc_cleanup = syncprov_ab_cleanup;
1078                                 cb->sc_next = op->o_callback;
1079                                 cb->sc_private = so;
1080                                 return SLAP_CB_CONTINUE;
1081                         }
1082                 }
1083                 syncprov_drop_psearch( so, 0 );
1084         }
1085         return SLAP_CB_CONTINUE;
1086 }
1087
1088 /* Find which persistent searches are affected by this operation */
1089 static void
1090 syncprov_matchops( Operation *op, opcookie *opc, int saveit )
1091 {
1092         slap_overinst *on = opc->son;
1093         syncprov_info_t         *si = on->on_bi.bi_private;
1094
1095         fbase_cookie fc;
1096         syncops *ss, *sprev, *snext;
1097         Entry *e = NULL;
1098         Attribute *a;
1099         int rc;
1100         struct berval newdn;
1101         int freefdn = 0;
1102         BackendDB *b0 = op->o_bd, db;
1103
1104         fc.fdn = &op->o_req_ndn;
1105         /* compute new DN */
1106         if ( op->o_tag == LDAP_REQ_MODRDN && !saveit ) {
1107                 struct berval pdn;
1108                 if ( op->orr_nnewSup ) pdn = *op->orr_nnewSup;
1109                 else dnParent( fc.fdn, &pdn );
1110                 build_new_dn( &newdn, &pdn, &op->orr_nnewrdn, op->o_tmpmemctx );
1111                 fc.fdn = &newdn;
1112                 freefdn = 1;
1113         }
1114         if ( op->o_tag != LDAP_REQ_ADD ) {
1115                 if ( !SLAP_ISOVERLAY( op->o_bd )) {
1116                         db = *op->o_bd;
1117                         op->o_bd = &db;
1118                 }
1119                 rc = overlay_entry_get_ov( op, fc.fdn, NULL, NULL, 0, &e, on );
1120                 /* If we're sending responses now, make a copy and unlock the DB */
1121                 if ( e && !saveit ) {
1122                         Entry *e2 = entry_dup( e );
1123                         overlay_entry_release_ov( op, e, 0, on );
1124                         e = e2;
1125                 }
1126                 if ( rc ) {
1127                         op->o_bd = b0;
1128                         return;
1129                 }
1130         } else {
1131                 e = op->ora_e;
1132         }
1133
1134         if ( saveit || op->o_tag == LDAP_REQ_ADD ) {
1135                 ber_dupbv_x( &opc->sdn, &e->e_name, op->o_tmpmemctx );
1136                 ber_dupbv_x( &opc->sndn, &e->e_nname, op->o_tmpmemctx );
1137                 opc->sreference = is_entry_referral( e );
1138                 a = attr_find( e->e_attrs, slap_schema.si_ad_entryUUID );
1139                 if ( a )
1140                         ber_dupbv_x( &opc->suuid, &a->a_nvals[0], op->o_tmpmemctx );
1141         } else if ( op->o_tag == LDAP_REQ_MODRDN && !saveit ) {
1142                 op->o_tmpfree( opc->sndn.bv_val, op->o_tmpmemctx );
1143                 op->o_tmpfree( opc->sdn.bv_val, op->o_tmpmemctx );
1144                 ber_dupbv_x( &opc->sdn, &e->e_name, op->o_tmpmemctx );
1145                 ber_dupbv_x( &opc->sndn, &e->e_nname, op->o_tmpmemctx );
1146         }
1147
1148         ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
1149         for (ss = si->si_ops, sprev = (syncops *)&si->si_ops; ss;
1150                 sprev = ss, ss=snext)
1151         {
1152                 syncmatches *sm;
1153                 int found = 0;
1154
1155                 snext = ss->s_next;
1156                 /* validate base */
1157                 fc.fss = ss;
1158                 fc.fbase = 0;
1159                 fc.fscope = 0;
1160
1161                 /* If the base of the search is missing, signal a refresh */
1162                 rc = syncprov_findbase( op, &fc );
1163                 if ( rc != LDAP_SUCCESS ) {
1164                         SlapReply rs = {REP_RESULT};
1165                         send_ldap_error( ss->s_op, &rs, LDAP_SYNC_REFRESH_REQUIRED,
1166                                 "search base has changed" );
1167                         sprev->s_next = snext;
1168                         syncprov_drop_psearch( ss, 1 );
1169                         ss = sprev;
1170                         continue;
1171                 }
1172
1173
1174                 /* If we're sending results now, look for this op in old matches */
1175                 if ( !saveit ) {
1176                         syncmatches *old;
1177
1178                         /* Did we modify the search base? */
1179                         if ( dn_match( &op->o_req_ndn, &ss->s_base )) {
1180                                 ldap_pvt_thread_mutex_lock( &ss->s_mutex );
1181                                 ss->s_flags |= PS_WROTE_BASE;
1182                                 ldap_pvt_thread_mutex_unlock( &ss->s_mutex );
1183                         }
1184
1185                         for ( sm=opc->smatches, old=(syncmatches *)&opc->smatches; sm;
1186                                 old=sm, sm=sm->sm_next ) {
1187                                 if ( sm->sm_op == ss ) {
1188                                         found = 1;
1189                                         old->sm_next = sm->sm_next;
1190                                         op->o_tmpfree( sm, op->o_tmpmemctx );
1191                                         break;
1192                                 }
1193                         }
1194                 }
1195
1196                 /* check if current o_req_dn is in scope and matches filter */
1197                 if ( fc.fscope && test_filter( op, e, ss->s_op->ors_filter ) ==
1198                         LDAP_COMPARE_TRUE ) {
1199                         if ( saveit ) {
1200                                 sm = op->o_tmpalloc( sizeof(syncmatches), op->o_tmpmemctx );
1201                                 sm->sm_next = opc->smatches;
1202                                 sm->sm_op = ss;
1203                                 ldap_pvt_thread_mutex_lock( &ss->s_mutex );
1204                                 ++ss->s_inuse;
1205                                 ldap_pvt_thread_mutex_unlock( &ss->s_mutex );
1206                                 opc->smatches = sm;
1207                         } else {
1208                                 /* if found send UPDATE else send ADD */
1209                                 syncprov_qresp( opc, ss,
1210                                         found ? LDAP_SYNC_MODIFY : LDAP_SYNC_ADD );
1211                         }
1212                 } else if ( !saveit && found ) {
1213                         /* send DELETE */
1214                         syncprov_qresp( opc, ss, LDAP_SYNC_DELETE );
1215                 }
1216         }
1217         ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
1218
1219         if ( op->o_tag != LDAP_REQ_ADD && e ) {
1220                 if ( !SLAP_ISOVERLAY( op->o_bd )) {
1221                         op->o_bd = &db;
1222                 }
1223                 overlay_entry_release_ov( op, e, 0, on );
1224                 op->o_bd = b0;
1225         }
1226         if ( freefdn ) {
1227                 op->o_tmpfree( fc.fdn->bv_val, op->o_tmpmemctx );
1228         }
1229         op->o_bd = b0;
1230 }
1231
1232 static int
1233 syncprov_op_cleanup( Operation *op, SlapReply *rs )
1234 {
1235         slap_callback *cb = op->o_callback;
1236         opcookie *opc = cb->sc_private;
1237         slap_overinst *on = opc->son;
1238         syncprov_info_t         *si = on->on_bi.bi_private;
1239         syncmatches *sm, *snext;
1240         modtarget *mt, mtdummy;
1241
1242         for (sm = opc->smatches; sm; sm=snext) {
1243                 snext = sm->sm_next;
1244                 syncprov_free_syncop( sm->sm_op );
1245                 op->o_tmpfree( sm, op->o_tmpmemctx );
1246         }
1247
1248         /* Remove op from lock table */
1249         mtdummy.mt_op = op;
1250         ldap_pvt_thread_mutex_lock( &si->si_mods_mutex );
1251         mt = avl_find( si->si_mods, &mtdummy, sp_avl_cmp );
1252         if ( mt ) {
1253                 modinst *mi = mt->mt_mods;
1254
1255                 /* If there are more, promote the next one */
1256                 ldap_pvt_thread_mutex_lock( &mt->mt_mutex );
1257                 if ( mi->mi_next ) {
1258                         mt->mt_mods = mi->mi_next;
1259                         mt->mt_op = mt->mt_mods->mi_op;
1260                         ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
1261                 } else {
1262                         avl_delete( &si->si_mods, mt, sp_avl_cmp );
1263                         ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
1264                         ldap_pvt_thread_mutex_destroy( &mt->mt_mutex );
1265                         ch_free( mt );
1266                 }
1267         }
1268         ldap_pvt_thread_mutex_unlock( &si->si_mods_mutex );
1269         if ( !BER_BVISNULL( &opc->suuid ))
1270                 op->o_tmpfree( opc->suuid.bv_val, op->o_tmpmemctx );
1271         if ( !BER_BVISNULL( &opc->sndn ))
1272                 op->o_tmpfree( opc->sndn.bv_val, op->o_tmpmemctx );
1273         if ( !BER_BVISNULL( &opc->sdn ))
1274                 op->o_tmpfree( opc->sdn.bv_val, op->o_tmpmemctx );
1275         op->o_callback = cb->sc_next;
1276         op->o_tmpfree(cb, op->o_tmpmemctx);
1277
1278         return 0;
1279 }
1280
1281 static void
1282 syncprov_checkpoint( Operation *op, SlapReply *rs, slap_overinst *on )
1283 {
1284         syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
1285         Modifications mod;
1286         Operation opm;
1287         SlapReply rsm = { 0 };
1288         slap_callback cb = {0};
1289
1290         mod.sml_numvals = si->si_numcsns;
1291         mod.sml_values = si->si_ctxcsn;
1292         mod.sml_nvalues = NULL;
1293         mod.sml_desc = slap_schema.si_ad_contextCSN;
1294         mod.sml_op = LDAP_MOD_REPLACE;
1295         mod.sml_flags = 0;
1296         mod.sml_next = NULL;
1297
1298         cb.sc_response = slap_null_cb;
1299         opm = *op;
1300         opm.o_tag = LDAP_REQ_MODIFY;
1301         opm.o_callback = &cb;
1302         opm.orm_modlist = &mod;
1303         opm.orm_no_opattrs = 1;
1304         opm.o_req_dn = op->o_bd->be_suffix[0];
1305         opm.o_req_ndn = op->o_bd->be_nsuffix[0];
1306         opm.o_bd->bd_info = on->on_info->oi_orig;
1307         opm.o_managedsait = SLAP_CONTROL_NONCRITICAL;
1308         opm.o_no_schema_check = 1;
1309         opm.o_bd->be_modify( &opm, &rsm );
1310         if ( mod.sml_next != NULL ) {
1311                 slap_mods_free( mod.sml_next, 1 );
1312         }
1313         opm.orm_no_opattrs = 0;
1314 }
1315
1316 static void
1317 syncprov_add_slog( Operation *op )
1318 {
1319         opcookie *opc = op->o_callback->sc_private;
1320         slap_overinst *on = opc->son;
1321         syncprov_info_t         *si = on->on_bi.bi_private;
1322         sessionlog *sl;
1323         slog_entry *se;
1324
1325         sl = si->si_logs;
1326         {
1327                 /* Allocate a record. UUIDs are not NUL-terminated. */
1328                 se = ch_malloc( sizeof( slog_entry ) + opc->suuid.bv_len +
1329                         op->o_csn.bv_len + 1 );
1330                 se->se_next = NULL;
1331                 se->se_tag = op->o_tag;
1332
1333                 se->se_uuid.bv_val = (char *)(&se[1]);
1334                 AC_MEMCPY( se->se_uuid.bv_val, opc->suuid.bv_val, opc->suuid.bv_len );
1335                 se->se_uuid.bv_len = opc->suuid.bv_len;
1336
1337                 se->se_csn.bv_val = se->se_uuid.bv_val + opc->suuid.bv_len;
1338                 AC_MEMCPY( se->se_csn.bv_val, op->o_csn.bv_val, op->o_csn.bv_len );
1339                 se->se_csn.bv_val[op->o_csn.bv_len] = '\0';
1340                 se->se_csn.bv_len = op->o_csn.bv_len;
1341                 se->se_sid = slap_parse_csn_sid( &se->se_csn );
1342
1343                 ldap_pvt_thread_mutex_lock( &sl->sl_mutex );
1344                 if ( sl->sl_head ) {
1345                         sl->sl_tail->se_next = se;
1346                 } else {
1347                         sl->sl_head = se;
1348                 }
1349                 sl->sl_tail = se;
1350                 sl->sl_num++;
1351                 while ( sl->sl_num > sl->sl_size ) {
1352                         se = sl->sl_head;
1353                         sl->sl_head = se->se_next;
1354                         strcpy( sl->sl_mincsn.bv_val, se->se_csn.bv_val );
1355                         sl->sl_mincsn.bv_len = se->se_csn.bv_len;
1356                         ch_free( se );
1357                         sl->sl_num--;
1358                 }
1359                 ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
1360         }
1361 }
1362
1363 /* Just set a flag if we found the matching entry */
1364 static int
1365 playlog_cb( Operation *op, SlapReply *rs )
1366 {
1367         if ( rs->sr_type == REP_SEARCH ) {
1368                 op->o_callback->sc_private = (void *)1;
1369         }
1370         return rs->sr_err;
1371 }
1372
1373 /* enter with sl->sl_mutex locked, release before returning */
1374 static void
1375 syncprov_playlog( Operation *op, SlapReply *rs, sessionlog *sl,
1376         sync_control *srs, BerVarray ctxcsn, int numcsns, int *sids )
1377 {
1378         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
1379         slog_entry *se;
1380         int i, j, ndel, num, nmods, mmods;
1381         char cbuf[LDAP_LUTIL_CSNSTR_BUFSIZE];
1382         BerVarray uuids;
1383         struct berval delcsn[2];
1384
1385         if ( !sl->sl_num ) {
1386                 ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
1387                 return;
1388         }
1389
1390         num = sl->sl_num;
1391         i = 0;
1392         nmods = 0;
1393
1394         uuids = op->o_tmpalloc( (num+1) * sizeof( struct berval ) +
1395                 num * UUID_LEN, op->o_tmpmemctx );
1396         uuids[0].bv_val = (char *)(uuids + num + 1);
1397
1398         delcsn[0].bv_len = 0;
1399         delcsn[0].bv_val = cbuf;
1400         BER_BVZERO(&delcsn[1]);
1401
1402         /* Make a copy of the relevant UUIDs. Put the Deletes up front
1403          * and everything else at the end. Do this first so we can
1404          * unlock the list mutex.
1405          */
1406         Debug( LDAP_DEBUG_SYNC, "srs csn %s\n",
1407                 srs->sr_state.ctxcsn[0].bv_val, 0, 0 );
1408         for ( se=sl->sl_head; se; se=se->se_next ) {
1409                 int k;
1410                 Debug( LDAP_DEBUG_SYNC, "log csn %s\n", se->se_csn.bv_val, 0, 0 );
1411                 ndel = 1;
1412                 for ( k=0; k<srs->sr_state.numcsns; k++ ) {
1413                         if ( se->se_sid == srs->sr_state.sids[k] ) {
1414                                 ndel = ber_bvcmp( &se->se_csn, &srs->sr_state.ctxcsn[k] );
1415                                 break;
1416                         }
1417                 }
1418                 if ( ndel <= 0 ) {
1419                         Debug( LDAP_DEBUG_SYNC, "cmp %d, too old\n", ndel, 0, 0 );
1420                         continue;
1421                 }
1422                 ndel = 0;
1423                 for ( k=0; k<numcsns; k++ ) {
1424                         if ( se->se_sid == sids[k] ) {
1425                                 ndel = ber_bvcmp( &se->se_csn, &ctxcsn[k] );
1426                                 break;
1427                         }
1428                 }
1429                 if ( ndel > 0 ) {
1430                         Debug( LDAP_DEBUG_SYNC, "cmp %d, too new\n", ndel, 0, 0 );
1431                         break;
1432                 }
1433                 if ( se->se_tag == LDAP_REQ_DELETE ) {
1434                         j = i;
1435                         i++;
1436                         AC_MEMCPY( cbuf, se->se_csn.bv_val, se->se_csn.bv_len );
1437                         delcsn[0].bv_len = se->se_csn.bv_len;
1438                         delcsn[0].bv_val[delcsn[0].bv_len] = '\0';
1439                 } else {
1440                         nmods++;
1441                         j = num - nmods;
1442                 }
1443                 uuids[j].bv_val = uuids[0].bv_val + (j * UUID_LEN);
1444                 AC_MEMCPY(uuids[j].bv_val, se->se_uuid.bv_val, UUID_LEN);
1445                 uuids[j].bv_len = UUID_LEN;
1446         }
1447         ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
1448
1449         ndel = i;
1450
1451         /* Zero out unused slots */
1452         for ( i=ndel; i < num - nmods; i++ )
1453                 uuids[i].bv_len = 0;
1454
1455         /* Mods must be validated to see if they belong in this delete set.
1456          */
1457
1458         mmods = nmods;
1459         /* Strip any duplicates */
1460         for ( i=0; i<nmods; i++ ) {
1461                 for ( j=0; j<ndel; j++ ) {
1462                         if ( bvmatch( &uuids[j], &uuids[num - 1 - i] )) {
1463                                 uuids[num - 1 - i].bv_len = 0;
1464                                 mmods --;
1465                                 break;
1466                         }
1467                 }
1468                 if ( uuids[num - 1 - i].bv_len == 0 ) continue;
1469                 for ( j=0; j<i; j++ ) {
1470                         if ( bvmatch( &uuids[num - 1 - j], &uuids[num - 1 - i] )) {
1471                                 uuids[num - 1 - i].bv_len = 0;
1472                                 mmods --;
1473                                 break;
1474                         }
1475                 }
1476         }
1477
1478         if ( mmods ) {
1479                 Operation fop;
1480                 SlapReply frs = { REP_RESULT };
1481                 int rc;
1482                 Filter mf, af;
1483                 AttributeAssertion eq = ATTRIBUTEASSERTION_INIT;
1484                 slap_callback cb = {0};
1485
1486                 fop = *op;
1487
1488                 fop.o_sync_mode = 0;
1489                 fop.o_callback = &cb;
1490                 fop.ors_limit = NULL;
1491                 fop.ors_tlimit = SLAP_NO_LIMIT;
1492                 fop.ors_attrs = slap_anlist_all_attributes;
1493                 fop.ors_attrsonly = 0;
1494                 fop.o_managedsait = SLAP_CONTROL_CRITICAL;
1495
1496                 af.f_choice = LDAP_FILTER_AND;
1497                 af.f_next = NULL;
1498                 af.f_and = &mf;
1499                 mf.f_choice = LDAP_FILTER_EQUALITY;
1500                 mf.f_ava = &eq;
1501                 mf.f_av_desc = slap_schema.si_ad_entryUUID;
1502                 mf.f_next = fop.ors_filter;
1503
1504                 fop.ors_filter = &af;
1505
1506                 cb.sc_response = playlog_cb;
1507                 fop.o_bd->bd_info = on->on_info->oi_orig;
1508
1509                 for ( i=ndel; i<num; i++ ) {
1510                         if ( uuids[i].bv_len == 0 ) continue;
1511
1512                         mf.f_av_value = uuids[i];
1513                         cb.sc_private = NULL;
1514                         fop.ors_slimit = 1;
1515                         frs.sr_nentries = 0;
1516                         rc = fop.o_bd->be_search( &fop, &frs );
1517
1518                         /* If entry was not found, add to delete list */
1519                         if ( !cb.sc_private ) {
1520                                 uuids[ndel++] = uuids[i];
1521                         }
1522                 }
1523                 fop.o_bd->bd_info = (BackendInfo *)on;
1524         }
1525         if ( ndel ) {
1526                 struct berval cookie;
1527
1528                 slap_compose_sync_cookie( op, &cookie, delcsn, srs->sr_state.rid,
1529                         srs->sr_state.sid );
1530                 uuids[ndel].bv_val = NULL;
1531                 syncprov_sendinfo( op, rs, LDAP_TAG_SYNC_ID_SET, &cookie, 0, uuids, 1 );
1532                 op->o_tmpfree( cookie.bv_val, op->o_tmpmemctx );
1533         }
1534         op->o_tmpfree( uuids, op->o_tmpmemctx );
1535 }
1536
1537 static int
1538 syncprov_op_response( Operation *op, SlapReply *rs )
1539 {
1540         opcookie *opc = op->o_callback->sc_private;
1541         slap_overinst *on = opc->son;
1542         syncprov_info_t         *si = on->on_bi.bi_private;
1543         syncmatches *sm;
1544
1545         if ( rs->sr_err == LDAP_SUCCESS )
1546         {
1547                 struct berval maxcsn = BER_BVNULL;
1548                 char cbuf[LDAP_LUTIL_CSNSTR_BUFSIZE];
1549                 int do_check = 0;
1550
1551                 /* Update our context CSN */
1552                 cbuf[0] = '\0';
1553                 ldap_pvt_thread_rdwr_wlock( &si->si_csn_rwlock );
1554                 slap_get_commit_csn( op, &maxcsn );
1555                 if ( !BER_BVISNULL( &maxcsn ) ) {
1556                         int i, sid;
1557                         strcpy( cbuf, maxcsn.bv_val );
1558                         sid = slap_parse_csn_sid( &maxcsn );
1559                         for ( i=0; i<si->si_numcsns; i++ ) {
1560                                 if ( sid == si->si_sids[i] ) {
1561                                         if ( ber_bvcmp( &maxcsn, &si->si_ctxcsn[i] ) > 0 ) {
1562                                                 ber_bvreplace( &si->si_ctxcsn[i], &maxcsn );
1563                                         }
1564                                         break;
1565                                 }
1566                         }
1567                         /* It's a new SID for us */
1568                         if ( i == si->si_numcsns ) {
1569                                 value_add_one( &si->si_ctxcsn, &maxcsn );
1570                                 si->si_numcsns++;
1571                                 si->si_sids = ch_realloc( si->si_sids, si->si_numcsns *
1572                                         sizeof(int));
1573                                 si->si_sids[i] = sid;
1574                         }
1575                 }
1576
1577                 /* Don't do any processing for consumer contextCSN updates */
1578                 if ( SLAP_SYNC_SHADOW( op->o_bd ) &&
1579                         op->o_msgid == SLAP_SYNC_UPDATE_MSGID ) {
1580                         ldap_pvt_thread_rdwr_wunlock( &si->si_csn_rwlock );
1581                         return SLAP_CB_CONTINUE;
1582                 }
1583
1584                 si->si_numops++;
1585                 if ( si->si_chkops || si->si_chktime ) {
1586                         if ( si->si_chkops && si->si_numops >= si->si_chkops ) {
1587                                 do_check = 1;
1588                                 si->si_numops = 0;
1589                         }
1590                         if ( si->si_chktime &&
1591                                 (op->o_time - si->si_chklast >= si->si_chktime )) {
1592                                 do_check = 1;
1593                                 si->si_chklast = op->o_time;
1594                         }
1595                 }
1596                 ldap_pvt_thread_rdwr_wunlock( &si->si_csn_rwlock );
1597
1598                 if ( do_check ) {
1599                         ldap_pvt_thread_rdwr_rlock( &si->si_csn_rwlock );
1600                         syncprov_checkpoint( op, rs, on );
1601                         ldap_pvt_thread_rdwr_runlock( &si->si_csn_rwlock );
1602                 }
1603
1604                 opc->sctxcsn.bv_len = maxcsn.bv_len;
1605                 opc->sctxcsn.bv_val = cbuf;
1606
1607                 /* Handle any persistent searches */
1608                 if ( si->si_ops ) {
1609                         switch(op->o_tag) {
1610                         case LDAP_REQ_ADD:
1611                         case LDAP_REQ_MODIFY:
1612                         case LDAP_REQ_MODRDN:
1613                         case LDAP_REQ_EXTENDED:
1614                                 syncprov_matchops( op, opc, 0 );
1615                                 break;
1616                         case LDAP_REQ_DELETE:
1617                                 /* for each match in opc->smatches:
1618                                  *   send DELETE msg
1619                                  */
1620                                 for ( sm = opc->smatches; sm; sm=sm->sm_next ) {
1621                                         if ( sm->sm_op->s_op->o_abandon )
1622                                                 continue;
1623                                         syncprov_qresp( opc, sm->sm_op, LDAP_SYNC_DELETE );
1624                                 }
1625                                 break;
1626                         }
1627                 }
1628
1629                 /* Add any log records */
1630                 if ( si->si_logs && op->o_tag != LDAP_REQ_ADD ) {
1631                         syncprov_add_slog( op );
1632                 }
1633
1634         }
1635         return SLAP_CB_CONTINUE;
1636 }
1637
1638 /* We don't use a subentry to store the context CSN any more.
1639  * We expose the current context CSN as an operational attribute
1640  * of the suffix entry.
1641  */
1642 static int
1643 syncprov_op_compare( Operation *op, SlapReply *rs )
1644 {
1645         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
1646         syncprov_info_t         *si = on->on_bi.bi_private;
1647         int rc = SLAP_CB_CONTINUE;
1648
1649         if ( dn_match( &op->o_req_ndn, op->o_bd->be_nsuffix ) &&
1650                 op->oq_compare.rs_ava->aa_desc == slap_schema.si_ad_contextCSN )
1651         {
1652                 Entry e = {0};
1653                 Attribute a = {0};
1654
1655                 e.e_name = op->o_bd->be_suffix[0];
1656                 e.e_nname = op->o_bd->be_nsuffix[0];
1657                 e.e_attrs = &a;
1658
1659                 a.a_desc = slap_schema.si_ad_contextCSN;
1660
1661                 ldap_pvt_thread_rdwr_rlock( &si->si_csn_rwlock );
1662
1663                 a.a_vals = si->si_ctxcsn;
1664                 a.a_nvals = a.a_vals;
1665
1666                 rs->sr_err = access_allowed( op, &e, op->oq_compare.rs_ava->aa_desc,
1667                         &op->oq_compare.rs_ava->aa_value, ACL_COMPARE, NULL );
1668                 if ( ! rs->sr_err ) {
1669                         rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
1670                         goto return_results;
1671                 }
1672
1673                 if ( get_assert( op ) &&
1674                         ( test_filter( op, &e, get_assertion( op ) ) != LDAP_COMPARE_TRUE ) )
1675                 {
1676                         rs->sr_err = LDAP_ASSERTION_FAILED;
1677                         goto return_results;
1678                 }
1679
1680
1681                 rs->sr_err = LDAP_COMPARE_FALSE;
1682
1683                 if ( attr_valfind( &a,
1684                         SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
1685                                 SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
1686                                 &op->oq_compare.rs_ava->aa_value, NULL, op->o_tmpmemctx ) == 0 )
1687                 {
1688                         rs->sr_err = LDAP_COMPARE_TRUE;
1689                 }
1690
1691 return_results:;
1692
1693                 ldap_pvt_thread_rdwr_runlock( &si->si_csn_rwlock );
1694
1695                 send_ldap_result( op, rs );
1696
1697                 if( rs->sr_err == LDAP_COMPARE_FALSE || rs->sr_err == LDAP_COMPARE_TRUE ) {
1698                         rs->sr_err = LDAP_SUCCESS;
1699                 }
1700                 rc = rs->sr_err;
1701         }
1702
1703         return rc;
1704 }
1705
1706 static int
1707 syncprov_op_mod( Operation *op, SlapReply *rs )
1708 {
1709         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
1710         syncprov_info_t         *si = on->on_bi.bi_private;
1711
1712         slap_callback *cb = op->o_tmpcalloc(1, sizeof(slap_callback)+
1713                 sizeof(opcookie) +
1714                 (si->si_ops ? sizeof(modinst) : 0 ),
1715                 op->o_tmpmemctx);
1716         opcookie *opc = (opcookie *)(cb+1);
1717         opc->son = on;
1718         cb->sc_response = syncprov_op_response;
1719         cb->sc_cleanup = syncprov_op_cleanup;
1720         cb->sc_private = opc;
1721         cb->sc_next = op->o_callback;
1722         op->o_callback = cb;
1723
1724         /* If there are active persistent searches, lock this operation.
1725          * See seqmod.c for the locking logic on its own.
1726          */
1727         if ( si->si_ops ) {
1728                 modtarget *mt, mtdummy;
1729                 modinst *mi;
1730
1731                 mi = (modinst *)(opc+1);
1732                 mi->mi_op = op;
1733
1734                 /* See if we're already modifying this entry... */
1735                 mtdummy.mt_op = op;
1736                 ldap_pvt_thread_mutex_lock( &si->si_mods_mutex );
1737                 mt = avl_find( si->si_mods, &mtdummy, sp_avl_cmp );
1738                 if ( mt ) {
1739                         ldap_pvt_thread_mutex_lock( &mt->mt_mutex );
1740                         ldap_pvt_thread_mutex_unlock( &si->si_mods_mutex );
1741                         mt->mt_tail->mi_next = mi;
1742                         mt->mt_tail = mi;
1743                         /* wait for this op to get to head of list */
1744                         while ( mt->mt_mods != mi ) {
1745                                 ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
1746                                 ldap_pvt_thread_yield();
1747                                 ldap_pvt_thread_mutex_lock( &mt->mt_mutex );
1748
1749                                 /* clean up if the caller is giving up */
1750                                 if ( op->o_abandon ) {
1751                                         modinst *m2;
1752                                         for ( m2 = mt->mt_mods; m2->mi_next != mi;
1753                                                 m2 = m2->mi_next );
1754                                         m2->mi_next = mi->mi_next;
1755                                         if ( mt->mt_tail == mi ) mt->mt_tail = m2;
1756                                         op->o_tmpfree( cb, op->o_tmpmemctx );
1757                                         ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
1758                                         return SLAPD_ABANDON;
1759                                 }
1760                         }
1761                         ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
1762                 } else {
1763                         /* Record that we're modifying this entry now */
1764                         mt = ch_malloc( sizeof(modtarget) );
1765                         mt->mt_mods = mi;
1766                         mt->mt_tail = mi;
1767                         mt->mt_op = mi->mi_op;
1768                         ldap_pvt_thread_mutex_init( &mt->mt_mutex );
1769                         avl_insert( &si->si_mods, mt, sp_avl_cmp, avl_dup_error );
1770                         ldap_pvt_thread_mutex_unlock( &si->si_mods_mutex );
1771                 }
1772         }
1773
1774         if (( si->si_ops || si->si_logs ) && op->o_tag != LDAP_REQ_ADD )
1775                 syncprov_matchops( op, opc, 1 );
1776
1777         return SLAP_CB_CONTINUE;
1778 }
1779
1780 static int
1781 syncprov_op_extended( Operation *op, SlapReply *rs )
1782 {
1783         if ( exop_is_write( op ))
1784                 return syncprov_op_mod( op, rs );
1785
1786         return SLAP_CB_CONTINUE;
1787 }
1788
1789 typedef struct searchstate {
1790         slap_overinst *ss_on;
1791         syncops *ss_so;
1792         BerVarray ss_ctxcsn;
1793         int *ss_sids;
1794         int ss_numcsns;
1795         int ss_present;
1796 } searchstate;
1797
1798 static int
1799 syncprov_search_cleanup( Operation *op, SlapReply *rs )
1800 {
1801         if ( rs->sr_ctrls ) {
1802                 op->o_tmpfree( rs->sr_ctrls[0], op->o_tmpmemctx );
1803                 op->o_tmpfree( rs->sr_ctrls, op->o_tmpmemctx );
1804                 rs->sr_ctrls = NULL;
1805         }
1806         return 0;
1807 }
1808
1809 typedef struct SyncOperationBuffer {
1810         Operation               sob_op;
1811         Opheader                sob_hdr;
1812         AttributeName   sob_extra;      /* not always present */
1813         /* Further data allocated here */
1814 } SyncOperationBuffer;
1815
1816 static void
1817 syncprov_detach_op( Operation *op, syncops *so, slap_overinst *on )
1818 {
1819         SyncOperationBuffer *sopbuf2;
1820         Operation *op2;
1821         int i, alen = 0;
1822         size_t size;
1823         char *ptr;
1824         GroupAssertion *g1, *g2;
1825
1826         /* count the search attrs */
1827         for (i=0; op->ors_attrs && !BER_BVISNULL( &op->ors_attrs[i].an_name ); i++) {
1828                 alen += op->ors_attrs[i].an_name.bv_len + 1;
1829         }
1830         /* Make a new copy of the operation */
1831         size = offsetof( SyncOperationBuffer, sob_extra ) +
1832                 (i ? ( (i+1) * sizeof(AttributeName) + alen) : 0) +
1833                 op->o_req_dn.bv_len + 1 +
1834                 op->o_req_ndn.bv_len + 1 +
1835                 op->o_ndn.bv_len + 1 +
1836                 so->s_filterstr.bv_len + 1;
1837         sopbuf2 = ch_calloc( 1, size );
1838         op2 = &sopbuf2->sob_op;
1839         op2->o_hdr = &sopbuf2->sob_hdr;
1840
1841         /* Copy the fields we care about explicitly, leave the rest alone */
1842         *op2->o_hdr = *op->o_hdr;
1843         op2->o_tag = op->o_tag;
1844         op2->o_time = op->o_time;
1845         op2->o_bd = on->on_info->oi_origdb;
1846         op2->o_request = op->o_request;
1847         op2->o_private = on;
1848
1849         ptr = (char *) sopbuf2 + offsetof( SyncOperationBuffer, sob_extra );
1850         if ( i ) {
1851                 op2->ors_attrs = (AttributeName *) ptr;
1852                 ptr = (char *) &op2->ors_attrs[i+1];
1853                 for (i=0; !BER_BVISNULL( &op->ors_attrs[i].an_name ); i++) {
1854                         op2->ors_attrs[i] = op->ors_attrs[i];
1855                         op2->ors_attrs[i].an_name.bv_val = ptr;
1856                         ptr = lutil_strcopy( ptr, op->ors_attrs[i].an_name.bv_val ) + 1;
1857                 }
1858                 BER_BVZERO( &op2->ors_attrs[i].an_name );
1859         }
1860
1861         op2->o_authz = op->o_authz;
1862         op2->o_ndn.bv_val = ptr;
1863         ptr = lutil_strcopy(ptr, op->o_ndn.bv_val) + 1;
1864         op2->o_dn = op2->o_ndn;
1865         op2->o_req_dn.bv_len = op->o_req_dn.bv_len;
1866         op2->o_req_dn.bv_val = ptr;
1867         ptr = lutil_strcopy(ptr, op->o_req_dn.bv_val) + 1;
1868         op2->o_req_ndn.bv_len = op->o_req_ndn.bv_len;
1869         op2->o_req_ndn.bv_val = ptr;
1870         ptr = lutil_strcopy(ptr, op->o_req_ndn.bv_val) + 1;
1871         op2->ors_filterstr.bv_val = ptr;
1872         strcpy( ptr, so->s_filterstr.bv_val );
1873         op2->ors_filterstr.bv_len = so->s_filterstr.bv_len;
1874
1875         /* Skip the AND/GE clause that we stuck on in front */
1876         if ( so->s_flags & PS_FIX_FILTER ) {
1877                 op2->ors_filter = op->ors_filter->f_and->f_next;
1878                 so->s_flags ^= PS_FIX_FILTER;
1879         } else {
1880                 op2->ors_filter = op->ors_filter;
1881         }
1882         op2->ors_filter = filter_dup( op2->ors_filter, NULL );
1883         so->s_op = op2;
1884
1885         /* Copy any cached group ACLs individually */
1886         op2->o_groups = NULL;
1887         for ( g1=op->o_groups; g1; g1=g1->ga_next ) {
1888                 g2 = ch_malloc( sizeof(GroupAssertion) + g1->ga_len );
1889                 *g2 = *g1;
1890                 strcpy( g2->ga_ndn, g1->ga_ndn );
1891                 g2->ga_next = op2->o_groups;
1892                 op2->o_groups = g2;
1893         }
1894         /* Don't allow any further group caching */
1895         op2->o_do_not_cache = 1;
1896
1897         /* Add op2 to conn so abandon will find us */
1898         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1899         op->o_conn->c_n_ops_executing++;
1900         op->o_conn->c_n_ops_completed--;
1901         LDAP_STAILQ_INSERT_TAIL( &op->o_conn->c_ops, op2, o_next );
1902         so->s_flags |= PS_IS_DETACHED;
1903         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1904
1905         /* Prevent anyone else from trying to send a result for this op */
1906         op->o_abandon = 1;
1907 }
1908
1909 static int
1910 syncprov_search_response( Operation *op, SlapReply *rs )
1911 {
1912         searchstate *ss = op->o_callback->sc_private;
1913         slap_overinst *on = ss->ss_on;
1914         sync_control *srs = op->o_controls[slap_cids.sc_LDAPsync];
1915
1916         if ( rs->sr_type == REP_SEARCH || rs->sr_type == REP_SEARCHREF ) {
1917                 Attribute *a;
1918                 /* If we got a referral without a referral object, there's
1919                  * something missing that we cannot replicate. Just ignore it.
1920                  * The consumer will abort because we didn't send the expected
1921                  * control.
1922                  */
1923                 if ( !rs->sr_entry ) {
1924                         assert( rs->sr_entry != NULL );
1925                         Debug( LDAP_DEBUG_ANY, "bogus referral in context\n",0,0,0 );
1926                         return SLAP_CB_CONTINUE;
1927                 }
1928                 a = attr_find( rs->sr_entry->e_attrs, slap_schema.si_ad_entryCSN );
1929                 if ( a == NULL && rs->sr_operational_attrs != NULL ) {
1930                         a = attr_find( rs->sr_operational_attrs, slap_schema.si_ad_entryCSN );
1931                 }
1932                 if ( a ) {
1933                         int i, sid;
1934                         sid = slap_parse_csn_sid( &a->a_nvals[0] );
1935
1936                         /* Don't send changed entries back to the originator */
1937                         if ( sid == srs->sr_state.sid && srs->sr_state.numcsns ) {
1938                                 Debug( LDAP_DEBUG_SYNC,
1939                                         "Entry %s changed by peer, ignored\n",
1940                                         rs->sr_entry->e_name.bv_val, 0, 0 );
1941                                 return LDAP_SUCCESS;
1942                         }
1943                         /* Make sure entry is less than the snapshot'd contextCSN */
1944                         for ( i=0; i<ss->ss_numcsns; i++ ) {
1945                                 if ( sid == ss->ss_sids[i] && ber_bvcmp( &a->a_nvals[0],
1946                                         &ss->ss_ctxcsn[i] ) > 0 ) {
1947                                         Debug( LDAP_DEBUG_SYNC,
1948                                                 "Entry %s CSN %s greater than snapshot %s\n",
1949                                                 rs->sr_entry->e_name.bv_val,
1950                                                 a->a_nvals[0].bv_val,
1951                                                 ss->ss_ctxcsn[i].bv_val );
1952                                         return LDAP_SUCCESS;
1953                                 }
1954                         }
1955
1956                         /* Don't send old entries twice */
1957                         if ( srs->sr_state.ctxcsn ) {
1958                                 for ( i=0; i<srs->sr_state.numcsns; i++ ) {
1959                                         if ( sid == srs->sr_state.sids[i] &&
1960                                                 ber_bvcmp( &a->a_nvals[0],
1961                                                         &srs->sr_state.ctxcsn[i] )<= 0 ) {
1962                                                 Debug( LDAP_DEBUG_SYNC,
1963                                                         "Entry %s CSN %s older or equal to ctx %s\n",
1964                                                         rs->sr_entry->e_name.bv_val,
1965                                                         a->a_nvals[0].bv_val,
1966                                                         srs->sr_state.ctxcsn[i].bv_val );
1967                                                 return LDAP_SUCCESS;
1968                                         }
1969                                 }
1970                         }
1971                 }
1972                 rs->sr_ctrls = op->o_tmpalloc( sizeof(LDAPControl *)*2,
1973                         op->o_tmpmemctx );
1974                 rs->sr_ctrls[1] = NULL;
1975                 rs->sr_err = syncprov_state_ctrl( op, rs, rs->sr_entry,
1976                         LDAP_SYNC_ADD, rs->sr_ctrls, 0, 0, NULL );
1977         } else if ( rs->sr_type == REP_RESULT && rs->sr_err == LDAP_SUCCESS ) {
1978                 struct berval cookie;
1979
1980                 slap_compose_sync_cookie( op, &cookie, ss->ss_ctxcsn,
1981                         srs->sr_state.rid, srs->sr_state.sid );
1982
1983                 /* Is this a regular refresh? */
1984                 if ( !ss->ss_so ) {
1985                         rs->sr_ctrls = op->o_tmpalloc( sizeof(LDAPControl *)*2,
1986                                 op->o_tmpmemctx );
1987                         rs->sr_ctrls[1] = NULL;
1988                         rs->sr_err = syncprov_done_ctrl( op, rs, rs->sr_ctrls,
1989                                 0, 1, &cookie, ss->ss_present ?  LDAP_SYNC_REFRESH_PRESENTS :
1990                                         LDAP_SYNC_REFRESH_DELETES );
1991                         op->o_tmpfree( cookie.bv_val, op->o_tmpmemctx );
1992                 } else {
1993                 /* It's RefreshAndPersist, transition to Persist phase */
1994                         syncprov_sendinfo( op, rs, ss->ss_present ?
1995                                 LDAP_TAG_SYNC_REFRESH_PRESENT : LDAP_TAG_SYNC_REFRESH_DELETE,
1996                                 &cookie, 1, NULL, 0 );
1997                         op->o_tmpfree( cookie.bv_val, op->o_tmpmemctx );
1998
1999                         /* Detach this Op from frontend control */
2000                         ldap_pvt_thread_mutex_lock( &ss->ss_so->s_mutex );
2001
2002                         /* Turn off the refreshing flag */
2003                         ss->ss_so->s_flags ^= PS_IS_REFRESHING;
2004
2005                         syncprov_detach_op( op, ss->ss_so, on );
2006
2007                         /* If there are queued responses, fire them off */
2008                         if ( ss->ss_so->s_res )
2009                                 syncprov_qstart( ss->ss_so );
2010                         ldap_pvt_thread_mutex_unlock( &ss->ss_so->s_mutex );
2011
2012                         return LDAP_SUCCESS;
2013                 }
2014         }
2015
2016         return SLAP_CB_CONTINUE;
2017 }
2018
2019 static int
2020 syncprov_op_search( Operation *op, SlapReply *rs )
2021 {
2022         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
2023         syncprov_info_t         *si = (syncprov_info_t *)on->on_bi.bi_private;
2024         slap_callback   *cb;
2025         int gotstate = 0, nochange = 0, do_present;
2026         syncops *sop = NULL;
2027         searchstate *ss;
2028         sync_control *srs;
2029         BerVarray ctxcsn;
2030         int i, *sids, numcsns;
2031         struct berval mincsn;
2032
2033         if ( !(op->o_sync_mode & SLAP_SYNC_REFRESH) ) return SLAP_CB_CONTINUE;
2034
2035         if ( op->ors_deref & LDAP_DEREF_SEARCHING ) {
2036                 send_ldap_error( op, rs, LDAP_PROTOCOL_ERROR, "illegal value for derefAliases" );
2037                 return rs->sr_err;
2038         }
2039
2040         do_present = si->si_nopres ? 0 : 1;
2041
2042         srs = op->o_controls[slap_cids.sc_LDAPsync];
2043         op->o_managedsait = SLAP_CONTROL_NONCRITICAL;
2044
2045         /* If this is a persistent search, set it up right away */
2046         if ( op->o_sync_mode & SLAP_SYNC_PERSIST ) {
2047                 syncops so = {0};
2048                 fbase_cookie fc;
2049                 opcookie opc;
2050                 slap_callback sc;
2051
2052                 fc.fss = &so;
2053                 fc.fbase = 0;
2054                 so.s_eid = NOID;
2055                 so.s_op = op;
2056                 so.s_flags = PS_IS_REFRESHING | PS_FIND_BASE;
2057                 /* syncprov_findbase expects to be called as a callback... */
2058                 sc.sc_private = &opc;
2059                 opc.son = on;
2060                 ldap_pvt_thread_mutex_init( &so.s_mutex );
2061                 cb = op->o_callback;
2062                 op->o_callback = &sc;
2063                 rs->sr_err = syncprov_findbase( op, &fc );
2064                 op->o_callback = cb;
2065                 ldap_pvt_thread_mutex_destroy( &so.s_mutex );
2066
2067                 if ( rs->sr_err != LDAP_SUCCESS ) {
2068                         send_ldap_result( op, rs );
2069                         return rs->sr_err;
2070                 }
2071                 sop = ch_malloc( sizeof( syncops ));
2072                 *sop = so;
2073                 ldap_pvt_thread_mutex_init( &sop->s_mutex );
2074                 sop->s_rid = srs->sr_state.rid;
2075                 sop->s_sid = srs->sr_state.sid;
2076                 sop->s_inuse = 1;
2077
2078                 ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
2079                 sop->s_next = si->si_ops;
2080                 si->si_ops = sop;
2081                 ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
2082         }
2083
2084         /* snapshot the ctxcsn */
2085         ldap_pvt_thread_rdwr_rlock( &si->si_csn_rwlock );
2086         numcsns = si->si_numcsns;
2087         if ( numcsns ) {
2088                 ber_bvarray_dup_x( &ctxcsn, si->si_ctxcsn, op->o_tmpmemctx );
2089                 sids = op->o_tmpalloc( numcsns * sizeof(int), op->o_tmpmemctx );
2090                 for ( i=0; i<numcsns; i++ )
2091                         sids[i] = si->si_sids[i];
2092         } else {
2093                 ctxcsn = NULL;
2094                 sids = NULL;
2095         }
2096         ldap_pvt_thread_rdwr_runlock( &si->si_csn_rwlock );
2097
2098         /* If we have a cookie, handle the PRESENT lookups */
2099         if ( srs->sr_state.ctxcsn ) {
2100                 sessionlog *sl;
2101                 int i, j;
2102
2103                 /* If we don't have any CSN of our own yet, pretend nothing
2104                  * has changed.
2105                  */
2106                 if ( !numcsns )
2107                         goto no_change;
2108
2109                 /* If there are SIDs we don't recognize in the cookie, drop them */
2110                 for (i=0; i<srs->sr_state.numcsns; ) {
2111                         for (j=0; j<numcsns; j++) {
2112                                 if ( srs->sr_state.sids[i] == sids[j] ) {
2113                                         break;
2114                                 }
2115                         }
2116                         /* not found */
2117                         if ( j == numcsns ) {
2118                                 struct berval tmp = srs->sr_state.ctxcsn[i];
2119                                 j = srs->sr_state.numcsns - 1;
2120                                 srs->sr_state.ctxcsn[i] = srs->sr_state.ctxcsn[j];
2121                                 tmp.bv_len = 0;
2122                                 srs->sr_state.ctxcsn[j] = tmp;
2123                                 srs->sr_state.numcsns = j;
2124                                 srs->sr_state.sids[i] = srs->sr_state.sids[j];
2125                                 continue;
2126                         }
2127                         i++;
2128                 }
2129
2130                 /* Find the smallest CSN */
2131                 mincsn = srs->sr_state.ctxcsn[0];
2132                 for ( i=1; i<srs->sr_state.numcsns; i++ ) {
2133                         if ( ber_bvcmp( &mincsn, &srs->sr_state.ctxcsn[i] ) > 0 )
2134                                 mincsn = srs->sr_state.ctxcsn[i];
2135                 }
2136
2137                 /* If nothing has changed, shortcut it */
2138                 if ( srs->sr_state.numcsns == numcsns ) {
2139                         int i, j, changed = 0;
2140                         for ( i=0; i<srs->sr_state.numcsns; i++ ) {
2141                                 for ( j=0; j<numcsns; j++ ) {
2142                                         if ( srs->sr_state.sids[i] != sids[j] )
2143                                                 continue;
2144                                         if ( !bvmatch( &srs->sr_state.ctxcsn[i], &ctxcsn[j] ))
2145                                                 changed = 1;
2146                                         break;
2147                                 }
2148                                 if ( changed )
2149                                         break;
2150                         }
2151                         if ( !changed ) {
2152 no_change:              nochange = 1;
2153                                 if ( !(op->o_sync_mode & SLAP_SYNC_PERSIST) ) {
2154                                         LDAPControl     *ctrls[2];
2155
2156                                         ctrls[0] = NULL;
2157                                         ctrls[1] = NULL;
2158                                         syncprov_done_ctrl( op, rs, ctrls, 0, 0,
2159                                                 NULL, LDAP_SYNC_REFRESH_DELETES );
2160                                         rs->sr_ctrls = ctrls;
2161                                         rs->sr_err = LDAP_SUCCESS;
2162                                         send_ldap_result( op, rs );
2163                                         rs->sr_ctrls = NULL;
2164                                         return rs->sr_err;
2165                                 }
2166                                 goto shortcut;
2167                         }
2168                 }
2169                 /* Do we have a sessionlog for this search? */
2170                 sl=si->si_logs;
2171                 if ( sl ) {
2172                         ldap_pvt_thread_mutex_lock( &sl->sl_mutex );
2173                         /* Are there any log entries, and is the consumer state
2174                          * present in the session log?
2175                          */
2176                         if ( sl->sl_num > 0 && ber_bvcmp( &mincsn, &sl->sl_mincsn ) >= 0 ) {
2177                                 do_present = 0;
2178                                 /* mutex is unlocked in playlog */
2179                                 syncprov_playlog( op, rs, sl, srs, ctxcsn, numcsns, sids );
2180                         } else {
2181                                 ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
2182                         }
2183                 }
2184                 /* Is the CSN still present in the database? */
2185                 if ( syncprov_findcsn( op, FIND_CSN ) != LDAP_SUCCESS ) {
2186                         /* No, so a reload is required */
2187                         /* the 2.2 consumer doesn't send this hint */
2188                         if ( si->si_usehint && srs->sr_rhint == 0 ) {
2189                                 if ( ctxcsn )
2190                                         ber_bvarray_free_x( ctxcsn, op->o_tmpmemctx );
2191                                 send_ldap_error( op, rs, LDAP_SYNC_REFRESH_REQUIRED, "sync cookie is stale" );
2192                                 return rs->sr_err;
2193                         }
2194                 } else {
2195                         gotstate = 1;
2196                         /* If changed and doing Present lookup, send Present UUIDs */
2197                         if ( do_present && syncprov_findcsn( op, FIND_PRESENT ) !=
2198                                 LDAP_SUCCESS ) {
2199                                 if ( ctxcsn )
2200                                         ber_bvarray_free_x( ctxcsn, op->o_tmpmemctx );
2201                                 send_ldap_result( op, rs );
2202                                 return rs->sr_err;
2203                         }
2204                 }
2205         }
2206
2207 shortcut:
2208         /* Append CSN range to search filter, save original filter
2209          * for persistent search evaluation
2210          */
2211         if ( sop ) {
2212                 sop->s_filterstr= op->ors_filterstr;
2213         }
2214
2215         /* If something changed, find the changes */
2216         if ( gotstate && !nochange ) {
2217                 Filter *fand, *fava;
2218
2219                 fand = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
2220                 fand->f_choice = LDAP_FILTER_AND;
2221                 fand->f_next = NULL;
2222                 fava = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
2223                 fand->f_and = fava;
2224                 fava->f_choice = LDAP_FILTER_GE;
2225                 fava->f_ava = op->o_tmpalloc( sizeof(AttributeAssertion), op->o_tmpmemctx );
2226                 fava->f_ava->aa_desc = slap_schema.si_ad_entryCSN;
2227 #ifdef LDAP_COMP_MATCH
2228                 fava->f_ava->aa_cf = NULL;
2229 #endif
2230                 ber_dupbv_x( &fava->f_ava->aa_value, &mincsn, op->o_tmpmemctx );
2231                 fava->f_next = op->ors_filter;
2232                 op->ors_filter = fand;
2233                 filter2bv_x( op, op->ors_filter, &op->ors_filterstr );
2234                 if ( sop )
2235                         sop->s_flags |= PS_FIX_FILTER;
2236         }
2237
2238         /* Let our callback add needed info to returned entries */
2239         cb = op->o_tmpcalloc(1, sizeof(slap_callback)+sizeof(searchstate), op->o_tmpmemctx);
2240         ss = (searchstate *)(cb+1);
2241         ss->ss_on = on;
2242         ss->ss_so = sop;
2243         ss->ss_present = do_present;
2244         ss->ss_ctxcsn = ctxcsn;
2245         ss->ss_numcsns = numcsns;
2246         ss->ss_sids = sids;
2247         cb->sc_response = syncprov_search_response;
2248         cb->sc_cleanup = syncprov_search_cleanup;
2249         cb->sc_private = ss;
2250         cb->sc_next = op->o_callback;
2251         op->o_callback = cb;
2252
2253         /* If this is a persistent search and no changes were reported during
2254          * the refresh phase, just invoke the response callback to transition
2255          * us into persist phase
2256          */
2257         if ( nochange ) {
2258                 rs->sr_err = LDAP_SUCCESS;
2259                 rs->sr_nentries = 0;
2260                 send_ldap_result( op, rs );
2261                 return rs->sr_err;
2262         }
2263         return SLAP_CB_CONTINUE;
2264 }
2265
2266 static int
2267 syncprov_operational(
2268         Operation *op,
2269         SlapReply *rs )
2270 {
2271         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
2272         syncprov_info_t         *si = (syncprov_info_t *)on->on_bi.bi_private;
2273
2274         if ( rs->sr_entry &&
2275                 dn_match( &rs->sr_entry->e_nname, op->o_bd->be_nsuffix )) {
2276
2277                 if ( SLAP_OPATTRS( rs->sr_attr_flags ) ||
2278                         ad_inlist( slap_schema.si_ad_contextCSN, rs->sr_attrs )) {
2279                         Attribute *a, **ap = NULL;
2280
2281                         for ( a=rs->sr_entry->e_attrs; a; a=a->a_next ) {
2282                                 if ( a->a_desc == slap_schema.si_ad_contextCSN )
2283                                         break;
2284                         }
2285
2286                         ldap_pvt_thread_rdwr_rlock( &si->si_csn_rwlock );
2287                         if ( si->si_ctxcsn ) {
2288                                 if ( !a ) {
2289                                         for ( ap = &rs->sr_operational_attrs; *ap;
2290                                                 ap=&(*ap)->a_next );
2291
2292                                         a = attr_alloc( slap_schema.si_ad_contextCSN );
2293                                         *ap = a;
2294                                 }
2295
2296                                 if ( !ap ) {
2297                                         if ( !rs->sr_flags & REP_ENTRY_MODIFIABLE ) {
2298                                                 rs->sr_entry = entry_dup( rs->sr_entry );
2299                                                 rs->sr_flags |=
2300                                                         REP_ENTRY_MODIFIABLE|REP_ENTRY_MUSTBEFREED;
2301                                                 a = attr_find( rs->sr_entry->e_attrs,
2302                                                         slap_schema.si_ad_contextCSN );
2303                                         }
2304                                         if ( a->a_nvals != a->a_vals ) {
2305                                                 ber_bvarray_free( a->a_nvals );
2306                                         }
2307                                         a->a_nvals = NULL;
2308                                         ber_bvarray_free( a->a_vals );
2309                                         a->a_vals = NULL;
2310                                         a->a_numvals = 0;
2311                                 }
2312                                 attr_valadd( a, si->si_ctxcsn, si->si_ctxcsn, si->si_numcsns );
2313                         }
2314                         ldap_pvt_thread_rdwr_runlock( &si->si_csn_rwlock );
2315                 }
2316         }
2317         return SLAP_CB_CONTINUE;
2318 }
2319
2320 enum {
2321         SP_CHKPT = 1,
2322         SP_SESSL,
2323         SP_NOPRES,
2324         SP_USEHINT
2325 };
2326
2327 static ConfigDriver sp_cf_gen;
2328
2329 static ConfigTable spcfg[] = {
2330         { "syncprov-checkpoint", "ops> <minutes", 3, 3, 0, ARG_MAGIC|SP_CHKPT,
2331                 sp_cf_gen, "( OLcfgOvAt:1.1 NAME 'olcSpCheckpoint' "
2332                         "DESC 'ContextCSN checkpoint interval in ops and minutes' "
2333                         "SYNTAX OMsDirectoryString SINGLE-VALUE )", NULL, NULL },
2334         { "syncprov-sessionlog", "ops", 2, 2, 0, ARG_INT|ARG_MAGIC|SP_SESSL,
2335                 sp_cf_gen, "( OLcfgOvAt:1.2 NAME 'olcSpSessionlog' "
2336                         "DESC 'Session log size in ops' "
2337                         "SYNTAX OMsInteger SINGLE-VALUE )", NULL, NULL },
2338         { "syncprov-nopresent", NULL, 2, 2, 0, ARG_ON_OFF|ARG_MAGIC|SP_NOPRES,
2339                 sp_cf_gen, "( OLcfgOvAt:1.3 NAME 'olcSpNoPresent' "
2340                         "DESC 'Omit Present phase processing' "
2341                         "SYNTAX OMsBoolean SINGLE-VALUE )", NULL, NULL },
2342         { "syncprov-reloadhint", NULL, 2, 2, 0, ARG_ON_OFF|ARG_MAGIC|SP_USEHINT,
2343                 sp_cf_gen, "( OLcfgOvAt:1.4 NAME 'olcSpReloadHint' "
2344                         "DESC 'Observe Reload Hint in Request control' "
2345                         "SYNTAX OMsBoolean SINGLE-VALUE )", NULL, NULL },
2346         { NULL, NULL, 0, 0, 0, ARG_IGNORED }
2347 };
2348
2349 static ConfigOCs spocs[] = {
2350         { "( OLcfgOvOc:1.1 "
2351                 "NAME 'olcSyncProvConfig' "
2352                 "DESC 'SyncRepl Provider configuration' "
2353                 "SUP olcOverlayConfig "
2354                 "MAY ( olcSpCheckpoint $ olcSpSessionlog $ olcSpNoPresent ) )",
2355                         Cft_Overlay, spcfg },
2356         { NULL, 0, NULL }
2357 };
2358
2359 static int
2360 sp_cf_gen(ConfigArgs *c)
2361 {
2362         slap_overinst           *on = (slap_overinst *)c->bi;
2363         syncprov_info_t         *si = (syncprov_info_t *)on->on_bi.bi_private;
2364         int rc = 0;
2365
2366         if ( c->op == SLAP_CONFIG_EMIT ) {
2367                 switch ( c->type ) {
2368                 case SP_CHKPT:
2369                         if ( si->si_chkops || si->si_chktime ) {
2370                                 struct berval bv;
2371                                 bv.bv_len = sprintf( c->cr_msg, "%d %d",
2372                                         si->si_chkops, si->si_chktime );
2373                                 bv.bv_val = c->cr_msg;
2374                                 value_add_one( &c->rvalue_vals, &bv );
2375                         } else {
2376                                 rc = 1;
2377                         }
2378                         break;
2379                 case SP_SESSL:
2380                         if ( si->si_logs ) {
2381                                 c->value_int = si->si_logs->sl_size;
2382                         } else {
2383                                 rc = 1;
2384                         }
2385                         break;
2386                 case SP_NOPRES:
2387                         if ( si->si_nopres ) {
2388                                 c->value_int = 1;
2389                         } else {
2390                                 rc = 1;
2391                         }
2392                         break;
2393                 case SP_USEHINT:
2394                         if ( si->si_usehint ) {
2395                                 c->value_int = 1;
2396                         } else {
2397                                 rc = 1;
2398                         }
2399                         break;
2400                 }
2401                 return rc;
2402         } else if ( c->op == LDAP_MOD_DELETE ) {
2403                 switch ( c->type ) {
2404                 case SP_CHKPT:
2405                         si->si_chkops = 0;
2406                         si->si_chktime = 0;
2407                         break;
2408                 case SP_SESSL:
2409                         if ( si->si_logs )
2410                                 si->si_logs->sl_size = 0;
2411                         else
2412                                 rc = LDAP_NO_SUCH_ATTRIBUTE;
2413                         break;
2414                 case SP_NOPRES:
2415                         if ( si->si_nopres )
2416                                 si->si_nopres = 0;
2417                         else
2418                                 rc = LDAP_NO_SUCH_ATTRIBUTE;
2419                         break;
2420                 case SP_USEHINT:
2421                         if ( si->si_usehint )
2422                                 si->si_usehint = 0;
2423                         else
2424                                 rc = LDAP_NO_SUCH_ATTRIBUTE;
2425                         break;
2426                 }
2427                 return rc;
2428         }
2429         switch ( c->type ) {
2430         case SP_CHKPT:
2431                 if ( lutil_atoi( &si->si_chkops, c->argv[1] ) != 0 ) {
2432                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s unable to parse checkpoint ops # \"%s\"",
2433                                 c->argv[0], c->argv[1] );
2434                         Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
2435                                 "%s: %s\n", c->log, c->cr_msg, 0 );
2436                         return ARG_BAD_CONF;
2437                 }
2438                 if ( si->si_chkops <= 0 ) {
2439                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s invalid checkpoint ops # \"%d\"",
2440                                 c->argv[0], si->si_chkops );
2441                         Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
2442                                 "%s: %s\n", c->log, c->cr_msg, 0 );
2443                         return ARG_BAD_CONF;
2444                 }
2445                 if ( lutil_atoi( &si->si_chktime, c->argv[2] ) != 0 ) {
2446                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s unable to parse checkpoint time \"%s\"",
2447                                 c->argv[0], c->argv[1] );
2448                         Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
2449                                 "%s: %s\n", c->log, c->cr_msg, 0 );
2450                         return ARG_BAD_CONF;
2451                 }
2452                 if ( si->si_chktime <= 0 ) {
2453                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s invalid checkpoint time \"%d\"",
2454                                 c->argv[0], si->si_chkops );
2455                         Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
2456                                 "%s: %s\n", c->log, c->cr_msg, 0 );
2457                         return ARG_BAD_CONF;
2458                 }
2459                 si->si_chktime *= 60;
2460                 break;
2461         case SP_SESSL: {
2462                 sessionlog *sl;
2463                 int size = c->value_int;
2464
2465                 if ( size < 0 ) {
2466                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s size %d is negative",
2467                                 c->argv[0], size );
2468                         Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
2469                                 "%s: %s\n", c->log, c->cr_msg, 0 );
2470                         return ARG_BAD_CONF;
2471                 }
2472                 sl = si->si_logs;
2473                 if ( !sl ) {
2474                         sl = ch_malloc( sizeof( sessionlog ) + LDAP_LUTIL_CSNSTR_BUFSIZE );
2475                         sl->sl_mincsn.bv_val = (char *)(sl+1);
2476                         sl->sl_mincsn.bv_len = 0;
2477                         sl->sl_num = 0;
2478                         sl->sl_head = sl->sl_tail = NULL;
2479                         ldap_pvt_thread_mutex_init( &sl->sl_mutex );
2480                         si->si_logs = sl;
2481                 }
2482                 sl->sl_size = size;
2483                 }
2484                 break;
2485         case SP_NOPRES:
2486                 si->si_nopres = c->value_int;
2487                 break;
2488         case SP_USEHINT:
2489                 si->si_usehint = c->value_int;
2490                 break;
2491         }
2492         return rc;
2493 }
2494
2495 /* ITS#3456 we cannot run this search on the main thread, must use a
2496  * child thread in order to insure we have a big enough stack.
2497  */
2498 static void *
2499 syncprov_db_otask(
2500         void *ptr
2501 )
2502 {
2503         syncprov_findcsn( ptr, FIND_MAXCSN );
2504         return NULL;
2505 }
2506
2507 /* Read any existing contextCSN from the underlying db.
2508  * Then search for any entries newer than that. If no value exists,
2509  * just generate it. Cache whatever result.
2510  */
2511 static int
2512 syncprov_db_open(
2513         BackendDB *be,
2514         ConfigReply *cr
2515 )
2516 {
2517         slap_overinst   *on = (slap_overinst *) be->bd_info;
2518         syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
2519
2520         Connection conn = { 0 };
2521         OperationBuffer opbuf;
2522         Operation *op;
2523         Entry *e = NULL;
2524         Attribute *a;
2525         int rc;
2526         void *thrctx = NULL;
2527
2528         if ( !SLAP_LASTMOD( be )) {
2529                 Debug( LDAP_DEBUG_ANY,
2530                         "syncprov_db_open: invalid config, lastmod must be enabled\n", 0, 0, 0 );
2531                 return -1;
2532         }
2533
2534         if ( slapMode & SLAP_TOOL_MODE ) {
2535                 return 0;
2536         }
2537
2538         rc = overlay_register_control( be, LDAP_CONTROL_SYNC );
2539         if ( rc ) {
2540                 return rc;
2541         }
2542
2543         thrctx = ldap_pvt_thread_pool_context();
2544         connection_fake_init( &conn, &opbuf, thrctx );
2545         op = &opbuf.ob_op;
2546         op->o_bd = be;
2547         op->o_dn = be->be_rootdn;
2548         op->o_ndn = be->be_rootndn;
2549
2550         rc = overlay_entry_get_ov( op, be->be_nsuffix, NULL,
2551                 slap_schema.si_ad_contextCSN, 0, &e, on );
2552
2553         if ( e ) {
2554                 ldap_pvt_thread_t tid;
2555
2556                 a = attr_find( e->e_attrs, slap_schema.si_ad_contextCSN );
2557                 if ( a ) {
2558                         ber_bvarray_dup_x( &si->si_ctxcsn, a->a_vals, NULL );
2559                         si->si_numcsns = a->a_numvals;
2560                         si->si_sids = slap_parse_csn_sids( si->si_ctxcsn, a->a_numvals, NULL );
2561                 }
2562                 overlay_entry_release_ov( op, e, 0, on );
2563                 if ( si->si_ctxcsn ) {
2564                         op->o_req_dn = be->be_suffix[0];
2565                         op->o_req_ndn = be->be_nsuffix[0];
2566                         op->ors_scope = LDAP_SCOPE_SUBTREE;
2567                         ldap_pvt_thread_create( &tid, 0, syncprov_db_otask, op );
2568                         ldap_pvt_thread_join( tid, NULL );
2569                 }
2570         }
2571
2572         /* Didn't find a contextCSN, should we generate one? */
2573         if ( !si->si_ctxcsn ) {
2574                 char csnbuf[ LDAP_LUTIL_CSNSTR_BUFSIZE ];
2575                 struct berval csn;
2576
2577                 if ( SLAP_SYNC_SHADOW( op->o_bd )) {
2578                 /* If we're also a consumer, then don't generate anything.
2579                  * Wait for our provider to send it to us, or for a local
2580                  * modify if we have multimaster.
2581                  */
2582                         goto out;
2583                 }
2584                 csn.bv_val = csnbuf;
2585                 csn.bv_len = sizeof( csnbuf );
2586                 slap_get_csn( op, &csn, 0 );
2587                 value_add_one( &si->si_ctxcsn, &csn );
2588                 si->si_numcsns = 1;
2589                 si->si_sids = ch_malloc( sizeof(int) );
2590                 si->si_sids[0] = slap_serverID;
2591
2592                 /* make sure we do a checkpoint on close */
2593                 si->si_numops++;
2594         }
2595
2596 out:
2597         op->o_bd->bd_info = (BackendInfo *)on;
2598         return 0;
2599 }
2600
2601 /* Write the current contextCSN into the underlying db.
2602  */
2603 static int
2604 syncprov_db_close(
2605         BackendDB *be,
2606         ConfigReply *cr
2607 )
2608 {
2609     slap_overinst   *on = (slap_overinst *) be->bd_info;
2610     syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
2611
2612         if ( slapMode & SLAP_TOOL_MODE ) {
2613                 return 0;
2614         }
2615         if ( si->si_numops ) {
2616                 Connection conn = {0};
2617                 OperationBuffer opbuf;
2618                 Operation *op;
2619                 SlapReply rs = {REP_RESULT};
2620                 void *thrctx;
2621
2622                 thrctx = ldap_pvt_thread_pool_context();
2623                 connection_fake_init( &conn, &opbuf, thrctx );
2624                 op = &opbuf.ob_op;
2625                 op->o_bd = be;
2626                 op->o_dn = be->be_rootdn;
2627                 op->o_ndn = be->be_rootndn;
2628                 syncprov_checkpoint( op, &rs, on );
2629         }
2630
2631     return 0;
2632 }
2633
2634 static int
2635 syncprov_db_init(
2636         BackendDB *be,
2637         ConfigReply *cr
2638 )
2639 {
2640         slap_overinst   *on = (slap_overinst *)be->bd_info;
2641         syncprov_info_t *si;
2642
2643         if ( SLAP_ISGLOBALOVERLAY( be ) ) {
2644                 Debug( LDAP_DEBUG_ANY,
2645                         "syncprov must be instantiated within a database.\n",
2646                         0, 0, 0 );
2647                 return 1;
2648         }
2649
2650         si = ch_calloc(1, sizeof(syncprov_info_t));
2651         on->on_bi.bi_private = si;
2652         ldap_pvt_thread_rdwr_init( &si->si_csn_rwlock );
2653         ldap_pvt_thread_mutex_init( &si->si_ops_mutex );
2654         ldap_pvt_thread_mutex_init( &si->si_mods_mutex );
2655
2656         csn_anlist[0].an_desc = slap_schema.si_ad_entryCSN;
2657         csn_anlist[0].an_name = slap_schema.si_ad_entryCSN->ad_cname;
2658         csn_anlist[1].an_desc = slap_schema.si_ad_entryUUID;
2659         csn_anlist[1].an_name = slap_schema.si_ad_entryUUID->ad_cname;
2660
2661         uuid_anlist[0].an_desc = slap_schema.si_ad_entryUUID;
2662         uuid_anlist[0].an_name = slap_schema.si_ad_entryUUID->ad_cname;
2663
2664         return 0;
2665 }
2666
2667 static int
2668 syncprov_db_destroy(
2669         BackendDB *be,
2670         ConfigReply *cr
2671 )
2672 {
2673         slap_overinst   *on = (slap_overinst *)be->bd_info;
2674         syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
2675
2676         if ( si ) {
2677                 if ( si->si_logs ) {
2678                         slog_entry *se = si->si_logs->sl_head;
2679
2680                         while ( se ) {
2681                                 slog_entry *se_next = se->se_next;
2682                                 ch_free( se );
2683                                 se = se_next;
2684                         }
2685
2686                         ch_free( si->si_logs );
2687                 }
2688                 if ( si->si_ctxcsn )
2689                         ber_bvarray_free( si->si_ctxcsn );
2690                 if ( si->si_sids )
2691                         ch_free( si->si_sids );
2692                 ldap_pvt_thread_mutex_destroy( &si->si_mods_mutex );
2693                 ldap_pvt_thread_mutex_destroy( &si->si_ops_mutex );
2694                 ldap_pvt_thread_rdwr_destroy( &si->si_csn_rwlock );
2695                 ch_free( si );
2696         }
2697
2698         return 0;
2699 }
2700
2701 static int syncprov_parseCtrl (
2702         Operation *op,
2703         SlapReply *rs,
2704         LDAPControl *ctrl )
2705 {
2706         ber_tag_t tag;
2707         BerElementBuffer berbuf;
2708         BerElement *ber = (BerElement *)&berbuf;
2709         ber_int_t mode;
2710         ber_len_t len;
2711         struct berval cookie = BER_BVNULL;
2712         sync_control *sr;
2713         int rhint = 0;
2714
2715         if ( op->o_sync != SLAP_CONTROL_NONE ) {
2716                 rs->sr_text = "Sync control specified multiple times";
2717                 return LDAP_PROTOCOL_ERROR;
2718         }
2719
2720         if ( op->o_pagedresults != SLAP_CONTROL_NONE ) {
2721                 rs->sr_text = "Sync control specified with pagedResults control";
2722                 return LDAP_PROTOCOL_ERROR;
2723         }
2724
2725         if ( BER_BVISNULL( &ctrl->ldctl_value ) ) {
2726                 rs->sr_text = "Sync control value is absent";
2727                 return LDAP_PROTOCOL_ERROR;
2728         }
2729
2730         if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
2731                 rs->sr_text = "Sync control value is empty";
2732                 return LDAP_PROTOCOL_ERROR;
2733         }
2734
2735         /* Parse the control value
2736          *      syncRequestValue ::= SEQUENCE {
2737          *              mode   ENUMERATED {
2738          *                      -- 0 unused
2739          *                      refreshOnly             (1),
2740          *                      -- 2 reserved
2741          *                      refreshAndPersist       (3)
2742          *              },
2743          *              cookie  syncCookie OPTIONAL
2744          *      }
2745          */
2746
2747         ber_init2( ber, &ctrl->ldctl_value, 0 );
2748
2749         if ( (tag = ber_scanf( ber, "{i" /*}*/, &mode )) == LBER_ERROR ) {
2750                 rs->sr_text = "Sync control : mode decoding error";
2751                 return LDAP_PROTOCOL_ERROR;
2752         }
2753
2754         switch( mode ) {
2755         case LDAP_SYNC_REFRESH_ONLY:
2756                 mode = SLAP_SYNC_REFRESH;
2757                 break;
2758         case LDAP_SYNC_REFRESH_AND_PERSIST:
2759                 mode = SLAP_SYNC_REFRESH_AND_PERSIST;
2760                 break;
2761         default:
2762                 rs->sr_text = "Sync control : unknown update mode";
2763                 return LDAP_PROTOCOL_ERROR;
2764         }
2765
2766         tag = ber_peek_tag( ber, &len );
2767
2768         if ( tag == LDAP_TAG_SYNC_COOKIE ) {
2769                 if (( ber_scanf( ber, /*{*/ "m", &cookie )) == LBER_ERROR ) {
2770                         rs->sr_text = "Sync control : cookie decoding error";
2771                         return LDAP_PROTOCOL_ERROR;
2772                 }
2773                 tag = ber_peek_tag( ber, &len );
2774         }
2775         if ( tag == LDAP_TAG_RELOAD_HINT ) {
2776                 if (( ber_scanf( ber, /*{*/ "b", &rhint )) == LBER_ERROR ) {
2777                         rs->sr_text = "Sync control : rhint decoding error";
2778                         return LDAP_PROTOCOL_ERROR;
2779                 }
2780         }
2781         if (( ber_scanf( ber, /*{*/ "}")) == LBER_ERROR ) {
2782                         rs->sr_text = "Sync control : decoding error";
2783                         return LDAP_PROTOCOL_ERROR;
2784         }
2785         sr = op->o_tmpcalloc( 1, sizeof(struct sync_control), op->o_tmpmemctx );
2786         sr->sr_rhint = rhint;
2787         if (!BER_BVISNULL(&cookie)) {
2788                 ber_dupbv_x( &sr->sr_state.octet_str, &cookie, op->o_tmpmemctx );
2789                 if ( slap_parse_sync_cookie( &sr->sr_state, op->o_tmpmemctx ) ||
2790                         sr->sr_state.rid == -1 ) {
2791                         rs->sr_text = "Sync control : cookie parsing error";
2792                         return LDAP_PROTOCOL_ERROR;
2793                 }
2794         }
2795
2796         op->o_controls[slap_cids.sc_LDAPsync] = sr;
2797
2798         op->o_sync = ctrl->ldctl_iscritical
2799                 ? SLAP_CONTROL_CRITICAL
2800                 : SLAP_CONTROL_NONCRITICAL;
2801
2802         op->o_sync_mode |= mode;        /* o_sync_mode shares o_sync */
2803
2804         return LDAP_SUCCESS;
2805 }
2806
2807 /* This overlay is set up for dynamic loading via moduleload. For static
2808  * configuration, you'll need to arrange for the slap_overinst to be
2809  * initialized and registered by some other function inside slapd.
2810  */
2811
2812 static slap_overinst            syncprov;
2813
2814 int
2815 syncprov_initialize()
2816 {
2817         int rc;
2818
2819         rc = register_supported_control( LDAP_CONTROL_SYNC,
2820                 SLAP_CTRL_SEARCH, NULL,
2821                 syncprov_parseCtrl, &slap_cids.sc_LDAPsync );
2822         if ( rc != LDAP_SUCCESS ) {
2823                 Debug( LDAP_DEBUG_ANY,
2824                         "syncprov_init: Failed to register control %d\n", rc, 0, 0 );
2825                 return rc;
2826         }
2827
2828         syncprov.on_bi.bi_type = "syncprov";
2829         syncprov.on_bi.bi_db_init = syncprov_db_init;
2830         syncprov.on_bi.bi_db_destroy = syncprov_db_destroy;
2831         syncprov.on_bi.bi_db_open = syncprov_db_open;
2832         syncprov.on_bi.bi_db_close = syncprov_db_close;
2833
2834         syncprov.on_bi.bi_op_abandon = syncprov_op_abandon;
2835         syncprov.on_bi.bi_op_cancel = syncprov_op_abandon;
2836
2837         syncprov.on_bi.bi_op_add = syncprov_op_mod;
2838         syncprov.on_bi.bi_op_compare = syncprov_op_compare;
2839         syncprov.on_bi.bi_op_delete = syncprov_op_mod;
2840         syncprov.on_bi.bi_op_modify = syncprov_op_mod;
2841         syncprov.on_bi.bi_op_modrdn = syncprov_op_mod;
2842         syncprov.on_bi.bi_op_search = syncprov_op_search;
2843         syncprov.on_bi.bi_extended = syncprov_op_extended;
2844         syncprov.on_bi.bi_operational = syncprov_operational;
2845
2846         syncprov.on_bi.bi_cf_ocs = spocs;
2847
2848         generic_filter.f_desc = slap_schema.si_ad_objectClass;
2849
2850         rc = config_register_schema( spcfg, spocs );
2851         if ( rc ) return rc;
2852
2853         return overlay_register( &syncprov );
2854 }
2855
2856 #if SLAPD_OVER_SYNCPROV == SLAPD_MOD_DYNAMIC
2857 int
2858 init_module( int argc, char *argv[] )
2859 {
2860         return syncprov_initialize();
2861 }
2862 #endif /* SLAPD_OVER_SYNCPROV == SLAPD_MOD_DYNAMIC */
2863
2864 #endif /* defined(SLAPD_OVER_SYNCPROV) */