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

   1 /* $OpenLDAP$ */
   2 /* syncprov.c - syncrepl provider */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 2004-2010 The OpenLDAP Foundation.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted only as authorized by the OpenLDAP
  10  * Public License.
  11  *
  12  * A copy of this license is available in the file LICENSE in the
  13  * top-level directory of the distribution or, alternatively, at
  14  * <http://www.OpenLDAP.org/license.html>.
  15  */
  16 /* ACKNOWLEDGEMENTS:
  17  * This work was initially developed by Howard Chu for inclusion in
  18  * OpenLDAP Software.
  19  */
  20
  21 #include "portable.h"
  22
  23 #ifdef SLAPD_OVER_SYNCPROV
  24
  25 #include <ac/string.h>
  26 #include "lutil.h"
  27 #include "slap.h"
  28 #include "config.h"
  29 #include "ldap_rq.h"
  30
  31 #ifdef LDAP_DEVEL
  32 #define CHECK_CSN       1
  33 #endif
  34
  35 /* A modify request on a particular entry */
  36 typedef struct modinst {
  37         struct modinst *mi_next;
  38         Operation *mi_op;
  39 } modinst;
  40
  41 typedef struct modtarget {
  42         struct modinst *mt_mods;
  43         struct modinst *mt_tail;
  44         Operation *mt_op;
  45         ldap_pvt_thread_mutex_t mt_mutex;
  46 } modtarget;
  47
  48 /* A queued result of a persistent search */
  49 typedef struct syncres {
  50         struct syncres *s_next;
  51         Entry *s_e;
  52         struct berval s_dn;
  53         struct berval s_ndn;
  54         struct berval s_uuid;
  55         struct berval s_csn;
  56         char s_mode;
  57         char s_isreference;
  58 } syncres;
  59
  60 /* Record of a persistent search */
  61 typedef struct syncops {
  62         struct syncops *s_next;
  63         struct berval   s_base;         /* ndn of search base */
  64         ID              s_eid;          /* entryID of search base */
  65         Operation       *s_op;          /* search op */
  66         int             s_rid;
  67         int             s_sid;
  68         struct berval s_filterstr;
  69         int             s_flags;        /* search status */
  70 #define PS_IS_REFRESHING        0x01
  71 #define PS_IS_DETACHED          0x02
  72 #define PS_WROTE_BASE           0x04
  73 #define PS_FIND_BASE            0x08
  74 #define PS_FIX_FILTER           0x10
  75 #define PS_TASK_QUEUED          0x20
  76
  77         int             s_inuse;        /* reference count */
  78         struct syncres *s_res;
  79         struct syncres *s_restail;
  80         ldap_pvt_thread_mutex_t s_mutex;
  81 } syncops;
  82
  83 /* A received sync control */
  84 typedef struct sync_control {
  85         struct sync_cookie sr_state;
  86         int sr_rhint;
  87 } sync_control;
  88
  89 #if 0 /* moved back to slap.h */
  90 #define o_sync  o_ctrlflag[slap_cids.sc_LDAPsync]
  91 #endif
  92 /* o_sync_mode uses data bits of o_sync */
  93 #define o_sync_mode     o_ctrlflag[slap_cids.sc_LDAPsync]
  94
  95 #define SLAP_SYNC_NONE                                  (LDAP_SYNC_NONE<<SLAP_CONTROL_SHIFT)
  96 #define SLAP_SYNC_REFRESH                               (LDAP_SYNC_REFRESH_ONLY<<SLAP_CONTROL_SHIFT)
  97 #define SLAP_SYNC_PERSIST                               (LDAP_SYNC_RESERVED<<SLAP_CONTROL_SHIFT)
  98 #define SLAP_SYNC_REFRESH_AND_PERSIST   (LDAP_SYNC_REFRESH_AND_PERSIST<<SLAP_CONTROL_SHIFT)
  99
 100 /* Record of which searches matched at premodify step */
 101 typedef struct syncmatches {
 102         struct syncmatches *sm_next;
 103         syncops *sm_op;
 104 } syncmatches;
 105
 106 /* Session log data */
 107 typedef struct slog_entry {
 108         struct slog_entry *se_next;
 109         struct berval se_uuid;
 110         struct berval se_csn;
 111         int     se_sid;
 112         ber_tag_t       se_tag;
 113 } slog_entry;
 114
 115 typedef struct sessionlog {
 116         struct berval   sl_mincsn;
 117         int             sl_num;
 118         int             sl_size;
 119         slog_entry *sl_head;
 120         slog_entry *sl_tail;
 121         ldap_pvt_thread_mutex_t sl_mutex;
 122 } sessionlog;
 123
 124 /* The main state for this overlay */
 125 typedef struct syncprov_info_t {
 126         syncops         *si_ops;
 127         BerVarray       si_ctxcsn;      /* ldapsync context */
 128         struct berval   si_contextdn;
 129         int             *si_sids;
 130         int             si_numcsns;
 131         int             si_chkops;      /* checkpointing info */
 132         int             si_chktime;
 133         int             si_numops;      /* number of ops since last checkpoint */
 134         int             si_nopres;      /* Skip present phase */
 135         int             si_usehint;     /* use reload hint */
 136         time_t  si_chklast;     /* time of last checkpoint */
 137         Avlnode *si_mods;       /* entries being modified */
 138         sessionlog      *si_logs;
 139         ldap_pvt_thread_rdwr_t  si_csn_rwlock;
 140         ldap_pvt_thread_mutex_t si_ops_mutex;
 141         ldap_pvt_thread_mutex_t si_mods_mutex;
 142         ldap_pvt_thread_mutex_t si_resp_mutex;
 143 } syncprov_info_t;
 144
 145 typedef struct opcookie {
 146         slap_overinst *son;
 147         syncmatches *smatches;
 148         modtarget *smt;
 149         Entry *se;
 150         struct berval sdn;      /* DN of entry, for deletes */
 151         struct berval sndn;
 152         struct berval suuid;    /* UUID of entry */
 153         struct berval sctxcsn;
 154         short osid;     /* sid of op csn */
 155         short rsid;     /* sid of relay */
 156         short sreference;       /* Is the entry a reference? */
 157 } opcookie;
 158
 159 typedef struct mutexint {
 160         ldap_pvt_thread_mutex_t mi_mutex;
 161         int mi_int;
 162 } mutexint;
 163
 164 typedef struct fbase_cookie {
 165         struct berval *fdn;     /* DN of a modified entry, for scope testing */
 166         syncops *fss;   /* persistent search we're testing against */
 167         int fbase;      /* if TRUE we found the search base and it's still valid */
 168         int fscope;     /* if TRUE then fdn is within the psearch scope */
 169 } fbase_cookie;
 170
 171 static AttributeName csn_anlist[3];
 172 static AttributeName uuid_anlist[2];
 173
 174 /* Build a LDAPsync intermediate state control */
 175 static int
 176 syncprov_state_ctrl(
 177         Operation       *op,
 178         SlapReply       *rs,
 179         Entry           *e,
 180         int             entry_sync_state,
 181         LDAPControl     **ctrls,
 182         int             num_ctrls,
 183         int             send_cookie,
 184         struct berval   *cookie )
 185 {
 186         Attribute* a;
 187         int ret;
 188
 189         BerElementBuffer berbuf;
 190         BerElement *ber = (BerElement *)&berbuf;
 191
 192         struct berval   entryuuid_bv = BER_BVNULL;
 193
 194         ber_init2( ber, 0, LBER_USE_DER );
 195         ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
 196
 197         ctrls[num_ctrls] = op->o_tmpalloc( sizeof ( LDAPControl ), op->o_tmpmemctx );
 198
 199         for ( a = e->e_attrs; a != NULL; a = a->a_next ) {
 200                 AttributeDescription *desc = a->a_desc;
 201                 if ( desc == slap_schema.si_ad_entryUUID ) {
 202                         entryuuid_bv = a->a_nvals[0];
 203                         break;
 204                 }
 205         }
 206
 207         /* FIXME: what if entryuuid is NULL or empty ? */
 208
 209         if ( send_cookie && cookie ) {
 210                 ber_printf( ber, "{eOON}",
 211                         entry_sync_state, &entryuuid_bv, cookie );
 212         } else {
 213                 ber_printf( ber, "{eON}",
 214                         entry_sync_state, &entryuuid_bv );
 215         }
 216
 217         ctrls[num_ctrls]->ldctl_oid = LDAP_CONTROL_SYNC_STATE;
 218         ctrls[num_ctrls]->ldctl_iscritical = (op->o_sync == SLAP_CONTROL_CRITICAL);
 219         ret = ber_flatten2( ber, &ctrls[num_ctrls]->ldctl_value, 1 );
 220
 221         ber_free_buf( ber );
 222
 223         if ( ret < 0 ) {
 224                 Debug( LDAP_DEBUG_TRACE,
 225                         "slap_build_sync_ctrl: ber_flatten2 failed\n",
 226                         0, 0, 0 );
 227                 send_ldap_error( op, rs, LDAP_OTHER, "internal error" );
 228                 return ret;
 229         }
 230
 231         return LDAP_SUCCESS;
 232 }
 233
 234 /* Build a LDAPsync final state control */
 235 static int
 236 syncprov_done_ctrl(
 237         Operation       *op,
 238         SlapReply       *rs,
 239         LDAPControl     **ctrls,
 240         int                     num_ctrls,
 241         int                     send_cookie,
 242         struct berval *cookie,
 243         int                     refreshDeletes )
 244 {
 245         int ret;
 246         BerElementBuffer berbuf;
 247         BerElement *ber = (BerElement *)&berbuf;
 248
 249         ber_init2( ber, NULL, LBER_USE_DER );
 250         ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
 251
 252         ctrls[num_ctrls] = op->o_tmpalloc( sizeof ( LDAPControl ), op->o_tmpmemctx );
 253
 254         ber_printf( ber, "{" );
 255         if ( send_cookie && cookie ) {
 256                 ber_printf( ber, "O", cookie );
 257         }
 258         if ( refreshDeletes == LDAP_SYNC_REFRESH_DELETES ) {
 259                 ber_printf( ber, "b", refreshDeletes );
 260         }
 261         ber_printf( ber, "N}" );
 262
 263         ctrls[num_ctrls]->ldctl_oid = LDAP_CONTROL_SYNC_DONE;
 264         ctrls[num_ctrls]->ldctl_iscritical = (op->o_sync == SLAP_CONTROL_CRITICAL);
 265         ret = ber_flatten2( ber, &ctrls[num_ctrls]->ldctl_value, 1 );
 266
 267         ber_free_buf( ber );
 268
 269         if ( ret < 0 ) {
 270                 Debug( LDAP_DEBUG_TRACE,
 271                         "syncprov_done_ctrl: ber_flatten2 failed\n",
 272                         0, 0, 0 );
 273                 send_ldap_error( op, rs, LDAP_OTHER, "internal error" );
 274                 return ret;
 275         }
 276
 277         return LDAP_SUCCESS;
 278 }
 279
 280 static int
 281 syncprov_sendinfo(
 282         Operation       *op,
 283         SlapReply       *rs,
 284         int                     type,
 285         struct berval *cookie,
 286         int                     refreshDone,
 287         BerVarray       syncUUIDs,
 288         int                     refreshDeletes )
 289 {
 290         BerElementBuffer berbuf;
 291         BerElement *ber = (BerElement *)&berbuf;
 292         struct berval rspdata;
 293
 294         int ret;
 295
 296         ber_init2( ber, NULL, LBER_USE_DER );
 297         ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
 298
 299         if ( type ) {
 300                 switch ( type ) {
 301                 case LDAP_TAG_SYNC_NEW_COOKIE:
 302                         ber_printf( ber, "tO", type, cookie );
 303                         break;
 304                 case LDAP_TAG_SYNC_REFRESH_DELETE:
 305                 case LDAP_TAG_SYNC_REFRESH_PRESENT:
 306                         ber_printf( ber, "t{", type );
 307                         if ( cookie ) {
 308                                 ber_printf( ber, "O", cookie );
 309                         }
 310                         if ( refreshDone == 0 ) {
 311                                 ber_printf( ber, "b", refreshDone );
 312                         }
 313                         ber_printf( ber, "N}" );
 314                         break;
 315                 case LDAP_TAG_SYNC_ID_SET:
 316                         ber_printf( ber, "t{", type );
 317                         if ( cookie ) {
 318                                 ber_printf( ber, "O", cookie );
 319                         }
 320                         if ( refreshDeletes == 1 ) {
 321                                 ber_printf( ber, "b", refreshDeletes );
 322                         }
 323                         ber_printf( ber, "[W]", syncUUIDs );
 324                         ber_printf( ber, "N}" );
 325                         break;
 326                 default:
 327                         Debug( LDAP_DEBUG_TRACE,
 328                                 "syncprov_sendinfo: invalid syncinfo type (%d)\n",
 329                                 type, 0, 0 );
 330                         return LDAP_OTHER;
 331                 }
 332         }
 333
 334         ret = ber_flatten2( ber, &rspdata, 0 );
 335
 336         if ( ret < 0 ) {
 337                 Debug( LDAP_DEBUG_TRACE,
 338                         "syncprov_sendinfo: ber_flatten2 failed\n",
 339                         0, 0, 0 );
 340                 send_ldap_error( op, rs, LDAP_OTHER, "internal error" );
 341                 return ret;
 342         }
 343
 344         rs->sr_rspoid = LDAP_SYNC_INFO;
 345         rs->sr_rspdata = &rspdata;
 346         send_ldap_intermediate( op, rs );
 347         rs->sr_rspdata = NULL;
 348         ber_free_buf( ber );
 349
 350         return LDAP_SUCCESS;
 351 }
 352
 353 /* Find a modtarget in an AVL tree */
 354 static int
 355 sp_avl_cmp( const void *c1, const void *c2 )
 356 {
 357         const modtarget *m1, *m2;
 358         int rc;
 359
 360         m1 = c1; m2 = c2;
 361         rc = m1->mt_op->o_req_ndn.bv_len - m2->mt_op->o_req_ndn.bv_len;
 362
 363         if ( rc ) return rc;
 364         return ber_bvcmp( &m1->mt_op->o_req_ndn, &m2->mt_op->o_req_ndn );
 365 }
 366
 367 /* syncprov_findbase:
 368  *   finds the true DN of the base of a search (with alias dereferencing) and
 369  * checks to make sure the base entry doesn't get replaced with a different
 370  * entry (e.g., swapping trees via ModDN, or retargeting an alias). If a
 371  * change is detected, any persistent search on this base must be terminated /
 372  * reloaded.
 373  *   On the first call, we just save the DN and entryID. On subsequent calls
 374  * we compare the DN and entryID with the saved values.
 375  */
 376 static int
 377 findbase_cb( Operation *op, SlapReply *rs )
 378 {
 379         slap_callback *sc = op->o_callback;
 380
 381         if ( rs->sr_type == REP_SEARCH && rs->sr_err == LDAP_SUCCESS ) {
 382                 fbase_cookie *fc = sc->sc_private;
 383
 384                 /* If no entryID, we're looking for the first time.
 385                  * Just store whatever we got.
 386                  */
 387                 if ( fc->fss->s_eid == NOID ) {
 388                         fc->fbase = 2;
 389                         fc->fss->s_eid = rs->sr_entry->e_id;
 390                         ber_dupbv( &fc->fss->s_base, &rs->sr_entry->e_nname );
 391
 392                 } else if ( rs->sr_entry->e_id == fc->fss->s_eid &&
 393                         dn_match( &rs->sr_entry->e_nname, &fc->fss->s_base )) {
 394
 395                 /* OK, the DN is the same and the entryID is the same. */
 396                         fc->fbase = 1;
 397                 }
 398         }
 399         if ( rs->sr_err != LDAP_SUCCESS ) {
 400                 Debug( LDAP_DEBUG_ANY, "findbase failed! %d\n", rs->sr_err,0,0 );
 401         }
 402         return LDAP_SUCCESS;
 403 }
 404
 405 static Filter generic_filter = { LDAP_FILTER_PRESENT, { 0 }, NULL };
 406 static struct berval generic_filterstr = BER_BVC("(objectclass=*)");
 407
 408 static int
 409 syncprov_findbase( Operation *op, fbase_cookie *fc )
 410 {
 411         /* Use basic parameters from syncrepl search, but use
 412          * current op's threadctx / tmpmemctx
 413          */
 414         ldap_pvt_thread_mutex_lock( &fc->fss->s_mutex );
 415         if ( fc->fss->s_flags & PS_FIND_BASE ) {
 416                 slap_callback cb = {0};
 417                 Operation fop;
 418                 SlapReply frs = { REP_RESULT };
 419                 int rc;
 420
 421                 fc->fss->s_flags ^= PS_FIND_BASE;
 422                 ldap_pvt_thread_mutex_unlock( &fc->fss->s_mutex );
 423
 424                 fop = *fc->fss->s_op;
 425
 426                 fop.o_bd = fop.o_bd->bd_self;
 427                 fop.o_hdr = op->o_hdr;
 428                 fop.o_time = op->o_time;
 429                 fop.o_tincr = op->o_tincr;
 430
 431                 cb.sc_response = findbase_cb;
 432                 cb.sc_private = fc;
 433
 434                 fop.o_sync_mode = 0;    /* turn off sync mode */
 435                 fop.o_managedsait = SLAP_CONTROL_CRITICAL;
 436                 fop.o_callback = &cb;
 437                 fop.o_tag = LDAP_REQ_SEARCH;
 438                 fop.ors_scope = LDAP_SCOPE_BASE;
 439                 fop.ors_limit = NULL;
 440                 fop.ors_slimit = 1;
 441                 fop.ors_tlimit = SLAP_NO_LIMIT;
 442                 fop.ors_attrs = slap_anlist_no_attrs;
 443                 fop.ors_attrsonly = 1;
 444                 fop.ors_filter = &generic_filter;
 445                 fop.ors_filterstr = generic_filterstr;
 446
 447                 rc = fop.o_bd->be_search( &fop, &frs );
 448         } else {
 449                 ldap_pvt_thread_mutex_unlock( &fc->fss->s_mutex );
 450                 fc->fbase = 1;
 451         }
 452
 453         /* After the first call, see if the fdn resides in the scope */
 454         if ( fc->fbase == 1 ) {
 455                 switch ( fc->fss->s_op->ors_scope ) {
 456                 case LDAP_SCOPE_BASE:
 457                         fc->fscope = dn_match( fc->fdn, &fc->fss->s_base );
 458                         break;
 459                 case LDAP_SCOPE_ONELEVEL: {
 460                         struct berval pdn;
 461                         dnParent( fc->fdn, &pdn );
 462                         fc->fscope = dn_match( &pdn, &fc->fss->s_base );
 463                         break; }
 464                 case LDAP_SCOPE_SUBTREE:
 465                         fc->fscope = dnIsSuffix( fc->fdn, &fc->fss->s_base );
 466                         break;
 467                 case LDAP_SCOPE_SUBORDINATE:
 468                         fc->fscope = dnIsSuffix( fc->fdn, &fc->fss->s_base ) &&
 469                                 !dn_match( fc->fdn, &fc->fss->s_base );
 470                         break;
 471                 }
 472         }
 473
 474         if ( fc->fbase )
 475                 return LDAP_SUCCESS;
 476
 477         /* If entryID has changed, then the base of this search has
 478          * changed. Invalidate the psearch.
 479          */
 480         return LDAP_NO_SUCH_OBJECT;
 481 }
 482
 483 /* syncprov_findcsn:
 484  *   This function has three different purposes, but they all use a search
 485  * that filters on entryCSN so they're combined here.
 486  * 1: at startup time, after a contextCSN has been read from the database,
 487  * we search for all entries with CSN >= contextCSN in case the contextCSN
 488  * was not checkpointed at the previous shutdown.
 489  *
 490  * 2: when the current contextCSN is known and we have a sync cookie, we search
 491  * for one entry with CSN = the cookie CSN. If not found, try <= cookie CSN.
 492  * If an entry is found, the cookie CSN is valid, otherwise it is stale.
 493  *
 494  * 3: during a refresh phase, we search for all entries with CSN <= the cookie
 495  * CSN, and generate Present records for them. We always collect this result
 496  * in SyncID sets, even if there's only one match.
 497  */
 498 typedef enum find_csn_t {
 499         FIND_MAXCSN     = 1,
 500         FIND_CSN        = 2,
 501         FIND_PRESENT    = 3
 502 } find_csn_t;
 503
 504 static int
 505 findmax_cb( Operation *op, SlapReply *rs )
 506 {
 507         if ( rs->sr_type == REP_SEARCH && rs->sr_err == LDAP_SUCCESS ) {
 508                 struct berval *maxcsn = op->o_callback->sc_private;
 509                 Attribute *a = attr_find( rs->sr_entry->e_attrs,
 510                         slap_schema.si_ad_entryCSN );
 511
 512                 if ( a && ber_bvcmp( &a->a_vals[0], maxcsn ) > 0 &&
 513                         slap_parse_csn_sid( &a->a_vals[0] ) == slap_serverID ) {
 514                         maxcsn->bv_len = a->a_vals[0].bv_len;
 515                         strcpy( maxcsn->bv_val, a->a_vals[0].bv_val );
 516                 }
 517         }
 518         return LDAP_SUCCESS;
 519 }
 520
 521 static int
 522 findcsn_cb( Operation *op, SlapReply *rs )
 523 {
 524         slap_callback *sc = op->o_callback;
 525
 526         /* We just want to know that at least one exists, so it's OK if
 527          * we exceed the unchecked limit.
 528          */
 529         if ( rs->sr_err == LDAP_ADMINLIMIT_EXCEEDED ||
 530                 (rs->sr_type == REP_SEARCH && rs->sr_err == LDAP_SUCCESS )) {
 531                 sc->sc_private = (void *)1;
 532         }
 533         return LDAP_SUCCESS;
 534 }
 535
 536 /* Build a list of entryUUIDs for sending in a SyncID set */
 537
 538 #define UUID_LEN        16
 539
 540 typedef struct fpres_cookie {
 541         int num;
 542         BerVarray uuids;
 543         char *last;
 544 } fpres_cookie;
 545
 546 static int
 547 findpres_cb( Operation *op, SlapReply *rs )
 548 {
 549         slap_callback *sc = op->o_callback;
 550         fpres_cookie *pc = sc->sc_private;
 551         Attribute *a;
 552         int ret = SLAP_CB_CONTINUE;
 553
 554         switch ( rs->sr_type ) {
 555         case REP_SEARCH:
 556                 a = attr_find( rs->sr_entry->e_attrs, slap_schema.si_ad_entryUUID );
 557                 if ( a ) {
 558                         pc->uuids[pc->num].bv_val = pc->last;
 559                         AC_MEMCPY( pc->uuids[pc->num].bv_val, a->a_nvals[0].bv_val,
 560                                 pc->uuids[pc->num].bv_len );
 561                         pc->num++;
 562                         pc->last = pc->uuids[pc->num].bv_val;
 563                         pc->uuids[pc->num].bv_val = NULL;
 564                 }
 565                 ret = LDAP_SUCCESS;
 566                 if ( pc->num != SLAP_SYNCUUID_SET_SIZE )
 567                         break;
 568                 /* FALLTHRU */
 569         case REP_RESULT:
 570                 ret = rs->sr_err;
 571                 if ( pc->num ) {
 572                         ret = syncprov_sendinfo( op, rs, LDAP_TAG_SYNC_ID_SET, NULL,
 573                                 0, pc->uuids, 0 );
 574                         pc->uuids[pc->num].bv_val = pc->last;
 575                         pc->num = 0;
 576                         pc->last = pc->uuids[0].bv_val;
 577                 }
 578                 break;
 579         default:
 580                 break;
 581         }
 582         return ret;
 583 }
 584
 585 static int
 586 syncprov_findcsn( Operation *op, find_csn_t mode )
 587 {
 588         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
 589         syncprov_info_t         *si = on->on_bi.bi_private;
 590
 591         slap_callback cb = {0};
 592         Operation fop;
 593         SlapReply frs = { REP_RESULT };
 594         char buf[LDAP_PVT_CSNSTR_BUFSIZE + STRLENOF("(entryCSN<=)")];
 595         char cbuf[LDAP_PVT_CSNSTR_BUFSIZE];
 596         struct berval maxcsn;
 597         Filter cf;
 598         AttributeAssertion eq = ATTRIBUTEASSERTION_INIT;
 599         fpres_cookie pcookie;
 600         sync_control *srs = NULL;
 601         struct slap_limits_set fc_limits;
 602         int i, rc = LDAP_SUCCESS, findcsn_retry = 1;
 603         int maxid;
 604
 605         if ( mode != FIND_MAXCSN ) {
 606                 srs = op->o_controls[slap_cids.sc_LDAPsync];
 607         }
 608
 609         fop = *op;
 610         fop.o_sync_mode &= SLAP_CONTROL_MASK;   /* turn off sync_mode */
 611         /* We want pure entries, not referrals */
 612         fop.o_managedsait = SLAP_CONTROL_CRITICAL;
 613
 614         cf.f_ava = &eq;
 615         cf.f_av_desc = slap_schema.si_ad_entryCSN;
 616         BER_BVZERO( &cf.f_av_value );
 617         cf.f_next = NULL;
 618
 619         fop.o_callback = &cb;
 620         fop.ors_limit = NULL;
 621         fop.ors_tlimit = SLAP_NO_LIMIT;
 622         fop.ors_filter = &cf;
 623         fop.ors_filterstr.bv_val = buf;
 624
 625 again:
 626         switch( mode ) {
 627         case FIND_MAXCSN:
 628                 cf.f_choice = LDAP_FILTER_GE;
 629                 /* If there are multiple CSNs, use the one with our serverID */
 630                 for ( i=0; i<si->si_numcsns; i++) {
 631                         if ( slap_serverID == si->si_sids[i] ) {
 632                                 maxid = i;
 633                                 break;
 634                         }
 635                 }
 636                 if ( i == si->si_numcsns ) {
 637                         /* No match: this is multimaster, and none of the content in the DB
 638                          * originated locally. Treat like no CSN.
 639                          */
 640                         return LDAP_NO_SUCH_OBJECT;
 641                 }
 642                 cf.f_av_value = si->si_ctxcsn[maxid];
 643                 fop.ors_filterstr.bv_len = snprintf( buf, sizeof( buf ),
 644                         "(entryCSN>=%s)", cf.f_av_value.bv_val );
 645                 if ( fop.ors_filterstr.bv_len >= sizeof( buf ) ) {
 646                         return LDAP_OTHER;
 647                 }
 648                 fop.ors_attrsonly = 0;
 649                 fop.ors_attrs = csn_anlist;
 650                 fop.ors_slimit = SLAP_NO_LIMIT;
 651                 cb.sc_private = &maxcsn;
 652                 cb.sc_response = findmax_cb;
 653                 strcpy( cbuf, cf.f_av_value.bv_val );
 654                 maxcsn.bv_val = cbuf;
 655                 maxcsn.bv_len = cf.f_av_value.bv_len;
 656                 break;
 657         case FIND_CSN:
 658                 if ( BER_BVISEMPTY( &cf.f_av_value )) {
 659                         cf.f_av_value = srs->sr_state.ctxcsn[0];
 660                         /* If there are multiple CSNs, use the smallest */
 661                         for ( i=1; i<srs->sr_state.numcsns; i++ ) {
 662                                 if ( ber_bvcmp( &cf.f_av_value, &srs->sr_state.ctxcsn[i] )
 663                                         > 0 ) {
 664                                         cf.f_av_value = srs->sr_state.ctxcsn[i];
 665                                 }
 666                         }
 667                 }
 668                 /* Look for exact match the first time */
 669                 if ( findcsn_retry ) {
 670                         cf.f_choice = LDAP_FILTER_EQUALITY;
 671                         fop.ors_filterstr.bv_len = snprintf( buf, sizeof( buf ),
 672                                 "(entryCSN=%s)", cf.f_av_value.bv_val );
 673                 /* On retry, look for <= */
 674                 } else {
 675                         cf.f_choice = LDAP_FILTER_LE;
 676                         fop.ors_limit = &fc_limits;
 677                         memset( &fc_limits, 0, sizeof( fc_limits ));
 678                         fc_limits.lms_s_unchecked = 1;
 679                         fop.ors_filterstr.bv_len = snprintf( buf, sizeof( buf ),
 680                                 "(entryCSN<=%s)", cf.f_av_value.bv_val );
 681                 }
 682                 if ( fop.ors_filterstr.bv_len >= sizeof( buf ) ) {
 683                         return LDAP_OTHER;
 684                 }
 685                 fop.ors_attrsonly = 1;
 686                 fop.ors_attrs = slap_anlist_no_attrs;
 687                 fop.ors_slimit = 1;
 688                 cb.sc_private = NULL;
 689                 cb.sc_response = findcsn_cb;
 690                 break;
 691         case FIND_PRESENT:
 692                 fop.ors_filter = op->ors_filter;
 693                 fop.ors_filterstr = op->ors_filterstr;
 694                 fop.ors_attrsonly = 0;
 695                 fop.ors_attrs = uuid_anlist;
 696                 fop.ors_slimit = SLAP_NO_LIMIT;
 697                 cb.sc_private = &pcookie;
 698                 cb.sc_response = findpres_cb;
 699                 pcookie.num = 0;
 700
 701                 /* preallocate storage for a full set */
 702                 pcookie.uuids = op->o_tmpalloc( (SLAP_SYNCUUID_SET_SIZE+1) *
 703                         sizeof(struct berval) + SLAP_SYNCUUID_SET_SIZE * UUID_LEN,
 704                         op->o_tmpmemctx );
 705                 pcookie.last = (char *)(pcookie.uuids + SLAP_SYNCUUID_SET_SIZE+1);
 706                 pcookie.uuids[0].bv_val = pcookie.last;
 707                 pcookie.uuids[0].bv_len = UUID_LEN;
 708                 for (i=1; i<SLAP_SYNCUUID_SET_SIZE; i++) {
 709                         pcookie.uuids[i].bv_val = pcookie.uuids[i-1].bv_val + UUID_LEN;
 710                         pcookie.uuids[i].bv_len = UUID_LEN;
 711                 }
 712                 break;
 713         }
 714
 715         fop.o_bd->bd_info = (BackendInfo *)on->on_info;
 716         fop.o_bd->be_search( &fop, &frs );
 717         fop.o_bd->bd_info = (BackendInfo *)on;
 718
 719         switch( mode ) {
 720         case FIND_MAXCSN:
 721                 if ( ber_bvcmp( &si->si_ctxcsn[maxid], &maxcsn )) {
 722 #ifdef CHECK_CSN
 723                         Syntax *syn = slap_schema.si_ad_contextCSN->ad_type->sat_syntax;
 724                         assert( !syn->ssyn_validate( syn, &maxcsn ));
 725 #endif
 726                         ber_bvreplace( &si->si_ctxcsn[maxid], &maxcsn );
 727                         si->si_numops++;        /* ensure a checkpoint */
 728                 }
 729                 break;
 730         case FIND_CSN:
 731                 /* If matching CSN was not found, invalidate the context. */
 732                 if ( !cb.sc_private ) {
 733                         /* If we didn't find an exact match, then try for <= */
 734                         if ( findcsn_retry ) {
 735                                 findcsn_retry = 0;
 736                                 goto again;
 737                         }
 738                         rc = LDAP_NO_SUCH_OBJECT;
 739                 }
 740                 break;
 741         case FIND_PRESENT:
 742                 op->o_tmpfree( pcookie.uuids, op->o_tmpmemctx );
 743                 break;
 744         }
 745
 746         return rc;
 747 }
 748
 749 /* Should find a place to cache these */
 750 static mutexint *get_mutexint()
 751 {
 752         mutexint *mi = ch_malloc( sizeof( mutexint ));
 753         ldap_pvt_thread_mutex_init( &mi->mi_mutex );
 754         mi->mi_int = 1;
 755         return mi;
 756 }
 757
 758 static void inc_mutexint( mutexint *mi )
 759 {
 760         ldap_pvt_thread_mutex_lock( &mi->mi_mutex );
 761         mi->mi_int++;
 762         ldap_pvt_thread_mutex_unlock( &mi->mi_mutex );
 763 }
 764
 765 /* return resulting counter */
 766 static int dec_mutexint( mutexint *mi )
 767 {
 768         int i;
 769         ldap_pvt_thread_mutex_lock( &mi->mi_mutex );
 770         i = --mi->mi_int;
 771         ldap_pvt_thread_mutex_unlock( &mi->mi_mutex );
 772         if ( !i ) {
 773                 ldap_pvt_thread_mutex_destroy( &mi->mi_mutex );
 774                 ch_free( mi );
 775         }
 776         return i;
 777 }
 778
 779 static void
 780 syncprov_free_syncop( syncops *so )
 781 {
 782         syncres *sr, *srnext;
 783         GroupAssertion *ga, *gnext;
 784
 785         ldap_pvt_thread_mutex_lock( &so->s_mutex );
 786         /* already being freed, or still in use */
 787         if ( !so->s_inuse || --so->s_inuse > 0 ) {
 788                 ldap_pvt_thread_mutex_unlock( &so->s_mutex );
 789                 return;
 790         }
 791         ldap_pvt_thread_mutex_unlock( &so->s_mutex );
 792         if ( so->s_flags & PS_IS_DETACHED ) {
 793                 filter_free( so->s_op->ors_filter );
 794                 for ( ga = so->s_op->o_groups; ga; ga=gnext ) {
 795                         gnext = ga->ga_next;
 796                         ch_free( ga );
 797                 }
 798                 ch_free( so->s_op );
 799         }
 800         ch_free( so->s_base.bv_val );
 801         for ( sr=so->s_res; sr; sr=srnext ) {
 802                 srnext = sr->s_next;
 803                 if ( sr->s_e ) {
 804                         if ( !dec_mutexint( sr->s_e->e_private )) {
 805                                 sr->s_e->e_private = NULL;
 806                                 entry_free( sr->s_e );
 807                         }
 808                 }
 809                 ch_free( sr );
 810         }
 811         ldap_pvt_thread_mutex_destroy( &so->s_mutex );
 812         ch_free( so );
 813 }
 814
 815 /* Send a persistent search response */
 816 static int
 817 syncprov_sendresp( Operation *op, opcookie *opc, syncops *so, int mode )
 818 {
 819         slap_overinst *on = opc->son;
 820
 821         SlapReply rs = { REP_SEARCH };
 822         LDAPControl *ctrls[2];
 823         struct berval cookie = BER_BVNULL, csns[2];
 824         Entry e_uuid = {0};
 825         Attribute a_uuid = {0};
 826
 827         if ( so->s_op->o_abandon )
 828                 return SLAPD_ABANDON;
 829
 830         ctrls[1] = NULL;
 831         if ( !BER_BVISNULL( &opc->sctxcsn )) {
 832                 csns[0] = opc->sctxcsn;
 833                 BER_BVZERO( &csns[1] );
 834                 slap_compose_sync_cookie( op, &cookie, csns, so->s_rid, slap_serverID ? slap_serverID : -1 );
 835         }
 836
 837 #ifdef LDAP_DEBUG
 838         if ( so->s_sid > 0 ) {
 839                 Debug( LDAP_DEBUG_SYNC, "syncprov_sendresp: to=%03x, cookie=%s\n",
 840                         so->s_sid, cookie.bv_val ? cookie.bv_val : "", 0 );
 841         } else {
 842                 Debug( LDAP_DEBUG_SYNC, "syncprov_sendresp: cookie=%s\n",
 843                         cookie.bv_val ? cookie.bv_val : "", 0, 0 );
 844         }
 845 #endif
 846
 847         e_uuid.e_attrs = &a_uuid;
 848         a_uuid.a_desc = slap_schema.si_ad_entryUUID;
 849         a_uuid.a_nvals = &opc->suuid;
 850         rs.sr_err = syncprov_state_ctrl( op, &rs, &e_uuid,
 851                 mode, ctrls, 0, 1, &cookie );
 852         if ( !BER_BVISNULL( &cookie )) {
 853                 op->o_tmpfree( cookie.bv_val, op->o_tmpmemctx );
 854         }
 855
 856         rs.sr_ctrls = ctrls;
 857         rs.sr_entry = &e_uuid;
 858         if ( mode == LDAP_SYNC_ADD || mode == LDAP_SYNC_MODIFY ) {
 859                 e_uuid = *opc->se;
 860                 e_uuid.e_private = NULL;
 861         }
 862
 863         switch( mode ) {
 864         case LDAP_SYNC_ADD:
 865                 if ( opc->sreference && so->s_op->o_managedsait <= SLAP_CONTROL_IGNORED ) {
 866                         rs.sr_ref = get_entry_referrals( op, rs.sr_entry );
 867                         rs.sr_err = send_search_reference( op, &rs );
 868                         ber_bvarray_free( rs.sr_ref );
 869                         break;
 870                 }
 871                 /* fallthru */
 872         case LDAP_SYNC_MODIFY:
 873                 rs.sr_attrs = op->ors_attrs;
 874                 rs.sr_err = send_search_entry( op, &rs );
 875                 break;
 876         case LDAP_SYNC_DELETE:
 877                 e_uuid.e_attrs = NULL;
 878                 e_uuid.e_name = opc->sdn;
 879                 e_uuid.e_nname = opc->sndn;
 880                 if ( opc->sreference && so->s_op->o_managedsait <= SLAP_CONTROL_IGNORED ) {
 881                         struct berval bv = BER_BVNULL;
 882                         rs.sr_ref = &bv;
 883                         rs.sr_err = send_search_reference( op, &rs );
 884                 } else {
 885                         rs.sr_err = send_search_entry( op, &rs );
 886                 }
 887                 break;
 888         default:
 889                 assert(0);
 890         }
 891         /* In case someone else freed it already? */
 892         if ( rs.sr_ctrls ) {
 893                 int i;
 894                 for ( i=0; rs.sr_ctrls[i]; i++ ) {
 895                         if ( rs.sr_ctrls[i] == ctrls[0] ) {
 896                                 op->o_tmpfree( ctrls[0]->ldctl_value.bv_val, op->o_tmpmemctx );
 897                                 ctrls[0]->ldctl_value.bv_val = NULL;
 898                                 break;
 899                         }
 900                 }
 901                 rs.sr_ctrls = NULL;
 902         }
 903
 904         return rs.sr_err;
 905 }
 906
 907 static void
 908 syncprov_qstart( syncops *so );
 909
 910 /* Play back queued responses */
 911 static int
 912 syncprov_qplay( Operation *op, syncops *so )
 913 {
 914         slap_overinst *on = LDAP_SLIST_FIRST(&so->s_op->o_extra)->oe_key;
 915         syncres *sr;
 916         Entry *e;
 917         opcookie opc;
 918         int rc = 0;
 919
 920         opc.son = on;
 921
 922         do {
 923                 ldap_pvt_thread_mutex_lock( &so->s_mutex );
 924                 sr = so->s_res;
 925                 if ( sr )
 926                         so->s_res = sr->s_next;
 927                 if ( !so->s_res )
 928                         so->s_restail = NULL;
 929                 /* Exit loop with mutex held */
 930                 if ( !sr || so->s_op->o_abandon )
 931                         break;
 932                 ldap_pvt_thread_mutex_unlock( &so->s_mutex );
 933
 934                 if ( sr->s_mode == LDAP_SYNC_NEW_COOKIE ) {
 935                         SlapReply rs = { REP_INTERMEDIATE };
 936
 937                         rc = syncprov_sendinfo( op, &rs, LDAP_TAG_SYNC_NEW_COOKIE,
 938                                 &sr->s_csn, 0, NULL, 0 );
 939                 } else {
 940                         opc.sdn = sr->s_dn;
 941                         opc.sndn = sr->s_ndn;
 942                         opc.suuid = sr->s_uuid;
 943                         opc.sctxcsn = sr->s_csn;
 944                         opc.sreference = sr->s_isreference;
 945                         opc.se = sr->s_e;
 946
 947                         rc = syncprov_sendresp( op, &opc, so, sr->s_mode );
 948
 949                 }
 950                 if ( sr->s_e ) {
 951                         if ( !dec_mutexint( sr->s_e->e_private )) {
 952                                 sr->s_e->e_private = NULL;
 953                                 entry_free ( sr->s_e );
 954                         }
 955                 }
 956
 957                 ch_free( sr );
 958
 959                 /* Exit loop with mutex held */
 960                 ldap_pvt_thread_mutex_lock( &so->s_mutex );
 961
 962         } while (0);
 963
 964         /* We now only send one change at a time, to prevent one
 965          * psearch from hogging all the CPU. Resubmit this task if
 966          * there are more responses queued and no errors occurred.
 967          */
 968
 969         if ( rc == 0 && so->s_res ) {
 970                 syncprov_qstart( so );
 971         } else {
 972                 so->s_flags ^= PS_TASK_QUEUED;
 973         }
 974
 975         ldap_pvt_thread_mutex_unlock( &so->s_mutex );
 976         return rc;
 977 }
 978
 979 /* task for playing back queued responses */
 980 static void *
 981 syncprov_qtask( void *ctx, void *arg )
 982 {
 983         syncops *so = arg;
 984         OperationBuffer opbuf;
 985         Operation *op;
 986         BackendDB be;
 987         int rc;
 988
 989         op = &opbuf.ob_op;
 990         *op = *so->s_op;
 991         op->o_hdr = &opbuf.ob_hdr;
 992         op->o_controls = opbuf.ob_controls;
 993         memset( op->o_controls, 0, sizeof(opbuf.ob_controls) );
 994
 995         *op->o_hdr = *so->s_op->o_hdr;
 996
 997         op->o_tmpmemctx = slap_sl_mem_create(SLAP_SLAB_SIZE, SLAP_SLAB_STACK, ctx, 1);
 998         op->o_tmpmfuncs = &slap_sl_mfuncs;
 999         op->o_threadctx = ctx;
1000
1001         /* syncprov_qplay expects a fake db */
1002         be = *so->s_op->o_bd;
1003         be.be_flags |= SLAP_DBFLAG_OVERLAY;
1004         op->o_bd = &be;
1005         LDAP_SLIST_FIRST(&op->o_extra) = NULL;
1006         op->o_callback = NULL;
1007
1008         rc = syncprov_qplay( op, so );
1009
1010         /* decrement use count... */
1011         syncprov_free_syncop( so );
1012
1013         return NULL;
1014 }
1015
1016 /* Start the task to play back queued psearch responses */
1017 static void
1018 syncprov_qstart( syncops *so )
1019 {
1020         so->s_flags |= PS_TASK_QUEUED;
1021         so->s_inuse++;
1022         ldap_pvt_thread_pool_submit( &connection_pool,
1023                 syncprov_qtask, so );
1024 }
1025
1026 /* Queue a persistent search response */
1027 static int
1028 syncprov_qresp( opcookie *opc, syncops *so, int mode )
1029 {
1030         syncres *sr;
1031         int srsize;
1032         struct berval cookie = opc->sctxcsn;
1033
1034         if ( mode == LDAP_SYNC_NEW_COOKIE ) {
1035                 syncprov_info_t *si = opc->son->on_bi.bi_private;
1036
1037                 slap_compose_sync_cookie( NULL, &cookie, si->si_ctxcsn,
1038                         so->s_rid, slap_serverID ? slap_serverID : -1);
1039         }
1040
1041         srsize = sizeof(syncres) + opc->suuid.bv_len + 1 +
1042                 opc->sdn.bv_len + 1 + opc->sndn.bv_len + 1;
1043         if ( cookie.bv_len )
1044                 srsize += cookie.bv_len + 1;
1045         sr = ch_malloc( srsize );
1046         sr->s_next = NULL;
1047         sr->s_e = opc->se;
1048         /* bump refcount on this entry */
1049         if ( opc->se )
1050                 inc_mutexint( opc->se->e_private );
1051         sr->s_dn.bv_val = (char *)(sr + 1);
1052         sr->s_dn.bv_len = opc->sdn.bv_len;
1053         sr->s_mode = mode;
1054         sr->s_isreference = opc->sreference;
1055         sr->s_ndn.bv_val = lutil_strcopy( sr->s_dn.bv_val,
1056                  opc->sdn.bv_val ) + 1;
1057         sr->s_ndn.bv_len = opc->sndn.bv_len;
1058         sr->s_uuid.bv_val = lutil_strcopy( sr->s_ndn.bv_val,
1059                  opc->sndn.bv_val ) + 1;
1060         sr->s_uuid.bv_len = opc->suuid.bv_len;
1061         AC_MEMCPY( sr->s_uuid.bv_val, opc->suuid.bv_val, opc->suuid.bv_len );
1062         if ( cookie.bv_len ) {
1063                 sr->s_csn.bv_val = sr->s_uuid.bv_val + sr->s_uuid.bv_len + 1;
1064                 strcpy( sr->s_csn.bv_val, cookie.bv_val );
1065         } else {
1066                 sr->s_csn.bv_val = NULL;
1067         }
1068         sr->s_csn.bv_len = cookie.bv_len;
1069
1070         if ( mode == LDAP_SYNC_NEW_COOKIE && cookie.bv_val ) {
1071                 ch_free( cookie.bv_val );
1072         }
1073
1074         ldap_pvt_thread_mutex_lock( &so->s_mutex );
1075         if ( !so->s_res ) {
1076                 so->s_res = sr;
1077         } else {
1078                 so->s_restail->s_next = sr;
1079         }
1080         so->s_restail = sr;
1081
1082         /* If the base of the psearch was modified, check it next time round */
1083         if ( so->s_flags & PS_WROTE_BASE ) {
1084                 so->s_flags ^= PS_WROTE_BASE;
1085                 so->s_flags |= PS_FIND_BASE;
1086         }
1087         if (( so->s_flags & (PS_IS_DETACHED|PS_TASK_QUEUED)) == PS_IS_DETACHED ) {
1088                 syncprov_qstart( so );
1089         }
1090         ldap_pvt_thread_mutex_unlock( &so->s_mutex );
1091         return LDAP_SUCCESS;
1092 }
1093
1094 static int
1095 syncprov_drop_psearch( syncops *so, int lock )
1096 {
1097         if ( so->s_flags & PS_IS_DETACHED ) {
1098                 if ( lock )
1099                         ldap_pvt_thread_mutex_lock( &so->s_op->o_conn->c_mutex );
1100                 so->s_op->o_conn->c_n_ops_executing--;
1101                 so->s_op->o_conn->c_n_ops_completed++;
1102                 LDAP_STAILQ_REMOVE( &so->s_op->o_conn->c_ops, so->s_op, Operation,
1103                         o_next );
1104                 if ( lock )
1105                         ldap_pvt_thread_mutex_unlock( &so->s_op->o_conn->c_mutex );
1106         }
1107         syncprov_free_syncop( so );
1108
1109         return 0;
1110 }
1111
1112 static int
1113 syncprov_ab_cleanup( Operation *op, SlapReply *rs )
1114 {
1115         slap_callback *sc = op->o_callback;
1116         op->o_callback = sc->sc_next;
1117         syncprov_drop_psearch( op->o_callback->sc_private, 0 );
1118         op->o_tmpfree( sc, op->o_tmpmemctx );
1119         return 0;
1120 }
1121
1122 static int
1123 syncprov_op_abandon( Operation *op, SlapReply *rs )
1124 {
1125         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
1126         syncprov_info_t         *si = on->on_bi.bi_private;
1127         syncops *so, *soprev;
1128
1129         ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
1130         for ( so=si->si_ops, soprev = (syncops *)&si->si_ops; so;
1131                 soprev=so, so=so->s_next ) {
1132                 if ( so->s_op->o_connid == op->o_connid &&
1133                         so->s_op->o_msgid == op->orn_msgid ) {
1134                                 so->s_op->o_abandon = 1;
1135                                 soprev->s_next = so->s_next;
1136                                 break;
1137                 }
1138         }
1139         ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
1140         if ( so ) {
1141                 /* Is this really a Cancel exop? */
1142                 if ( op->o_tag != LDAP_REQ_ABANDON ) {
1143                         so->s_op->o_cancel = SLAP_CANCEL_ACK;
1144                         rs->sr_err = LDAP_CANCELLED;
1145                         send_ldap_result( so->s_op, rs );
1146                         if ( so->s_flags & PS_IS_DETACHED ) {
1147                                 slap_callback *cb;
1148                                 cb = op->o_tmpcalloc( 1, sizeof(slap_callback), op->o_tmpmemctx );
1149                                 cb->sc_cleanup = syncprov_ab_cleanup;
1150                                 cb->sc_next = op->o_callback;
1151                                 cb->sc_private = so;
1152                                 return SLAP_CB_CONTINUE;
1153                         }
1154                 }
1155                 syncprov_drop_psearch( so, 0 );
1156         }
1157         return SLAP_CB_CONTINUE;
1158 }
1159
1160 /* Find which persistent searches are affected by this operation */
1161 static void
1162 syncprov_matchops( Operation *op, opcookie *opc, int saveit )
1163 {
1164         slap_overinst *on = opc->son;
1165         syncprov_info_t         *si = on->on_bi.bi_private;
1166
1167         fbase_cookie fc;
1168         syncops *ss, *sprev, *snext;
1169         Entry *e = NULL;
1170         Attribute *a;
1171         int rc;
1172         struct berval newdn;
1173         int freefdn = 0;
1174         BackendDB *b0 = op->o_bd, db;
1175
1176         fc.fdn = &op->o_req_ndn;
1177         /* compute new DN */
1178         if ( op->o_tag == LDAP_REQ_MODRDN && !saveit ) {
1179                 struct berval pdn;
1180                 if ( op->orr_nnewSup ) pdn = *op->orr_nnewSup;
1181                 else dnParent( fc.fdn, &pdn );
1182                 build_new_dn( &newdn, &pdn, &op->orr_nnewrdn, op->o_tmpmemctx );
1183                 fc.fdn = &newdn;
1184                 freefdn = 1;
1185         }
1186         if ( op->o_tag != LDAP_REQ_ADD ) {
1187                 if ( !SLAP_ISOVERLAY( op->o_bd )) {
1188                         db = *op->o_bd;
1189                         op->o_bd = &db;
1190                 }
1191                 rc = overlay_entry_get_ov( op, fc.fdn, NULL, NULL, 0, &e, on );
1192                 /* If we're sending responses now, make a copy and unlock the DB */
1193                 if ( e && !saveit ) {
1194                         if ( !opc->se ) {
1195                                 opc->se = entry_dup( e );
1196                                 opc->se->e_private = get_mutexint();
1197                         }
1198                         overlay_entry_release_ov( op, e, 0, on );
1199                         e = opc->se;
1200                 }
1201                 if ( rc ) {
1202                         op->o_bd = b0;
1203                         return;
1204                 }
1205         } else {
1206                 e = op->ora_e;
1207                 if ( !saveit ) {
1208                         if ( !opc->se ) {
1209                                 opc->se = entry_dup( e );
1210                                 opc->se->e_private = get_mutexint();
1211                         }
1212                         e = opc->se;
1213                 }
1214         }
1215
1216         if ( saveit || op->o_tag == LDAP_REQ_ADD ) {
1217                 ber_dupbv_x( &opc->sdn, &e->e_name, op->o_tmpmemctx );
1218                 ber_dupbv_x( &opc->sndn, &e->e_nname, op->o_tmpmemctx );
1219                 opc->sreference = is_entry_referral( e );
1220                 a = attr_find( e->e_attrs, slap_schema.si_ad_entryUUID );
1221                 if ( a )
1222                         ber_dupbv_x( &opc->suuid, &a->a_nvals[0], op->o_tmpmemctx );
1223         } else if ( op->o_tag == LDAP_REQ_MODRDN && !saveit ) {
1224                 op->o_tmpfree( opc->sndn.bv_val, op->o_tmpmemctx );
1225                 op->o_tmpfree( opc->sdn.bv_val, op->o_tmpmemctx );
1226                 ber_dupbv_x( &opc->sdn, &e->e_name, op->o_tmpmemctx );
1227                 ber_dupbv_x( &opc->sndn, &e->e_nname, op->o_tmpmemctx );
1228         }
1229
1230         ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
1231         for (ss = si->si_ops, sprev = (syncops *)&si->si_ops; ss;
1232                 sprev = ss, ss=snext)
1233         {
1234                 Operation op2;
1235                 Opheader oh;
1236                 syncmatches *sm;
1237                 int found = 0;
1238
1239                 snext = ss->s_next;
1240                 if ( ss->s_op->o_abandon )
1241                         continue;
1242
1243                 /* Don't send ops back to the originator */
1244                 if ( opc->osid > 0 && opc->osid == ss->s_sid ) {
1245                         Debug( LDAP_DEBUG_SYNC, "syncprov_matchops: skipping original sid %03x\n",
1246                                 opc->osid, 0, 0 );
1247                         continue;
1248                 }
1249
1250                 /* Don't send ops back to the messenger */
1251                 if ( opc->rsid > 0 && opc->rsid == ss->s_sid ) {
1252                         Debug( LDAP_DEBUG_SYNC, "syncprov_matchops: skipping relayed sid %03x\n",
1253                                 opc->rsid, 0, 0 );
1254                         continue;
1255                 }
1256
1257                 /* validate base */
1258                 fc.fss = ss;
1259                 fc.fbase = 0;
1260                 fc.fscope = 0;
1261
1262                 /* If the base of the search is missing, signal a refresh */
1263                 rc = syncprov_findbase( op, &fc );
1264                 if ( rc != LDAP_SUCCESS ) {
1265                         SlapReply rs = {REP_RESULT};
1266                         send_ldap_error( ss->s_op, &rs, LDAP_SYNC_REFRESH_REQUIRED,
1267                                 "search base has changed" );
1268                         sprev->s_next = snext;
1269                         syncprov_drop_psearch( ss, 1 );
1270                         ss = sprev;
1271                         continue;
1272                 }
1273
1274                 /* If we're sending results now, look for this op in old matches */
1275                 if ( !saveit ) {
1276                         syncmatches *old;
1277
1278                         /* Did we modify the search base? */
1279                         if ( dn_match( &op->o_req_ndn, &ss->s_base )) {
1280                                 ldap_pvt_thread_mutex_lock( &ss->s_mutex );
1281                                 ss->s_flags |= PS_WROTE_BASE;
1282                                 ldap_pvt_thread_mutex_unlock( &ss->s_mutex );
1283                         }
1284
1285                         for ( sm=opc->smatches, old=(syncmatches *)&opc->smatches; sm;
1286                                 old=sm, sm=sm->sm_next ) {
1287                                 if ( sm->sm_op == ss ) {
1288                                         found = 1;
1289                                         old->sm_next = sm->sm_next;
1290                                         op->o_tmpfree( sm, op->o_tmpmemctx );
1291                                         break;
1292                                 }
1293                         }
1294                 }
1295
1296                 if ( fc.fscope ) {
1297                         op2 = *ss->s_op;
1298                         oh = *op->o_hdr;
1299                         oh.oh_conn = ss->s_op->o_conn;
1300                         oh.oh_connid = ss->s_op->o_connid;
1301                         op2.o_bd = op->o_bd->bd_self;
1302                         op2.o_hdr = &oh;
1303                         op2.o_extra = op->o_extra;
1304                         op2.o_callback = NULL;
1305                         ldap_pvt_thread_mutex_lock( &ss->s_mutex );
1306                         if (ss->s_flags & PS_FIX_FILTER) {
1307                                 /* Skip the AND/GE clause that we stuck on in front. We
1308                                    would lose deletes/mods that happen during the refresh
1309                                    phase otherwise (ITS#6555) */
1310                                 op2.ors_filter = ss->s_op->ors_filter->f_and->f_next;
1311                         }
1312                         ldap_pvt_thread_mutex_unlock( &ss->s_mutex );
1313                         rc = test_filter( &op2, e, op2.ors_filter );
1314                 }
1315
1316                 Debug( LDAP_DEBUG_TRACE, "syncprov_matchops: sid %03x fscope %d rc %d\n",
1317                         ss->s_sid, fc.fscope, rc );
1318
1319                 /* check if current o_req_dn is in scope and matches filter */
1320                 if ( fc.fscope && rc == LDAP_COMPARE_TRUE ) {
1321                         if ( saveit ) {
1322                                 sm = op->o_tmpalloc( sizeof(syncmatches), op->o_tmpmemctx );
1323                                 sm->sm_next = opc->smatches;
1324                                 sm->sm_op = ss;
1325                                 ldap_pvt_thread_mutex_lock( &ss->s_mutex );
1326                                 ++ss->s_inuse;
1327                                 ldap_pvt_thread_mutex_unlock( &ss->s_mutex );
1328                                 opc->smatches = sm;
1329                         } else {
1330                                 /* if found send UPDATE else send ADD */
1331                                 syncprov_qresp( opc, ss,
1332                                         found ? LDAP_SYNC_MODIFY : LDAP_SYNC_ADD );
1333                         }
1334                 } else if ( !saveit && found ) {
1335                         /* send DELETE */
1336                         syncprov_qresp( opc, ss, LDAP_SYNC_DELETE );
1337                 } else if ( !saveit ) {
1338                         syncprov_qresp( opc, ss, LDAP_SYNC_NEW_COOKIE );
1339                 }
1340                 if ( !saveit && found ) {
1341                         /* Decrement s_inuse, was incremented when called
1342                          * with saveit == TRUE
1343                          */
1344                         syncprov_free_syncop( ss );
1345                 }
1346         }
1347         ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
1348
1349         if ( op->o_tag != LDAP_REQ_ADD && e ) {
1350                 if ( !SLAP_ISOVERLAY( op->o_bd )) {
1351                         op->o_bd = &db;
1352                 }
1353                 if ( saveit )
1354                         overlay_entry_release_ov( op, e, 0, on );
1355                 op->o_bd = b0;
1356         }
1357         if ( opc->se && !saveit ) {
1358                 if ( !dec_mutexint( opc->se->e_private )) {
1359                         opc->se->e_private = NULL;
1360                         entry_free( opc->se );
1361                         opc->se = NULL;
1362                 }
1363         }
1364         if ( freefdn ) {
1365                 op->o_tmpfree( fc.fdn->bv_val, op->o_tmpmemctx );
1366         }
1367         op->o_bd = b0;
1368 }
1369
1370 static int
1371 syncprov_op_cleanup( Operation *op, SlapReply *rs )
1372 {
1373         slap_callback *cb = op->o_callback;
1374         opcookie *opc = cb->sc_private;
1375         slap_overinst *on = opc->son;
1376         syncprov_info_t         *si = on->on_bi.bi_private;
1377         syncmatches *sm, *snext;
1378         modtarget *mt, mtdummy;
1379
1380         for (sm = opc->smatches; sm; sm=snext) {
1381                 snext = sm->sm_next;
1382                 syncprov_free_syncop( sm->sm_op );
1383                 op->o_tmpfree( sm, op->o_tmpmemctx );
1384         }
1385
1386         /* Remove op from lock table */
1387         mt = opc->smt;
1388         if ( mt ) {
1389                 ldap_pvt_thread_mutex_lock( &mt->mt_mutex );
1390                 mt->mt_mods = mt->mt_mods->mi_next;
1391                 /* If there are more, promote the next one */
1392                 if ( mt->mt_mods ) {
1393                         mt->mt_op = mt->mt_mods->mi_op;
1394                         ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
1395                 } else {
1396                         ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
1397                         ldap_pvt_thread_mutex_lock( &si->si_mods_mutex );
1398                         avl_delete( &si->si_mods, mt, sp_avl_cmp );
1399                         ldap_pvt_thread_mutex_unlock( &si->si_mods_mutex );
1400                         ldap_pvt_thread_mutex_destroy( &mt->mt_mutex );
1401                         ch_free( mt );
1402                 }
1403         }
1404         if ( !BER_BVISNULL( &opc->suuid ))
1405                 op->o_tmpfree( opc->suuid.bv_val, op->o_tmpmemctx );
1406         if ( !BER_BVISNULL( &opc->sndn ))
1407                 op->o_tmpfree( opc->sndn.bv_val, op->o_tmpmemctx );
1408         if ( !BER_BVISNULL( &opc->sdn ))
1409                 op->o_tmpfree( opc->sdn.bv_val, op->o_tmpmemctx );
1410         op->o_callback = cb->sc_next;
1411         op->o_tmpfree(cb, op->o_tmpmemctx);
1412
1413         return 0;
1414 }
1415
1416 static void
1417 syncprov_checkpoint( Operation *op, SlapReply *rs, slap_overinst *on )
1418 {
1419         syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
1420         Modifications mod;
1421         Operation opm;
1422         SlapReply rsm = { 0 };
1423         slap_callback cb = {0};
1424         BackendDB be;
1425         BackendInfo *bi;
1426
1427 #ifdef CHECK_CSN
1428         Syntax *syn = slap_schema.si_ad_contextCSN->ad_type->sat_syntax;
1429
1430         int i;
1431         for ( i=0; i<si->si_numcsns; i++ ) {
1432                 assert( !syn->ssyn_validate( syn, si->si_ctxcsn+i ));
1433         }
1434 #endif
1435         mod.sml_numvals = si->si_numcsns;
1436         mod.sml_values = si->si_ctxcsn;
1437         mod.sml_nvalues = NULL;
1438         mod.sml_desc = slap_schema.si_ad_contextCSN;
1439         mod.sml_op = LDAP_MOD_REPLACE;
1440         mod.sml_flags = SLAP_MOD_INTERNAL;
1441         mod.sml_next = NULL;
1442
1443         cb.sc_response = slap_null_cb;
1444         opm = *op;
1445         opm.o_tag = LDAP_REQ_MODIFY;
1446         opm.o_callback = &cb;
1447         opm.orm_modlist = &mod;
1448         opm.orm_no_opattrs = 1;
1449         if ( SLAP_GLUE_SUBORDINATE( op->o_bd )) {
1450                 be = *on->on_info->oi_origdb;
1451                 opm.o_bd = &be;
1452         }
1453         opm.o_req_dn = si->si_contextdn;
1454         opm.o_req_ndn = si->si_contextdn;
1455         bi = opm.o_bd->bd_info;
1456         opm.o_bd->bd_info = on->on_info->oi_orig;
1457         opm.o_managedsait = SLAP_CONTROL_NONCRITICAL;
1458         opm.o_no_schema_check = 1;
1459         opm.o_bd->be_modify( &opm, &rsm );
1460
1461         if ( rsm.sr_err == LDAP_NO_SUCH_OBJECT &&
1462                 SLAP_SYNC_SUBENTRY( opm.o_bd )) {
1463                 const char      *text;
1464                 char txtbuf[SLAP_TEXT_BUFLEN];
1465                 size_t textlen = sizeof txtbuf;
1466                 Entry *e = slap_create_context_csn_entry( opm.o_bd, NULL );
1467                 slap_mods2entry( &mod, &e, 0, 1, &text, txtbuf, textlen);
1468                 opm.ora_e = e;
1469                 opm.o_bd->be_add( &opm, &rsm );
1470                 if ( e == opm.ora_e )
1471                         be_entry_release_w( &opm, opm.ora_e );
1472         }
1473         opm.o_bd->bd_info = bi;
1474
1475         if ( mod.sml_next != NULL ) {
1476                 slap_mods_free( mod.sml_next, 1 );
1477         }
1478 #ifdef CHECK_CSN
1479         for ( i=0; i<si->si_numcsns; i++ ) {
1480                 assert( !syn->ssyn_validate( syn, si->si_ctxcsn+i ));
1481         }
1482 #endif
1483 }
1484
1485 static void
1486 syncprov_add_slog( Operation *op )
1487 {
1488         opcookie *opc = op->o_callback->sc_private;
1489         slap_overinst *on = opc->son;
1490         syncprov_info_t         *si = on->on_bi.bi_private;
1491         sessionlog *sl;
1492         slog_entry *se;
1493
1494         sl = si->si_logs;
1495         {
1496                 /* Allocate a record. UUIDs are not NUL-terminated. */
1497                 se = ch_malloc( sizeof( slog_entry ) + opc->suuid.bv_len +
1498                         op->o_csn.bv_len + 1 );
1499                 se->se_next = NULL;
1500                 se->se_tag = op->o_tag;
1501
1502                 se->se_uuid.bv_val = (char *)(&se[1]);
1503                 AC_MEMCPY( se->se_uuid.bv_val, opc->suuid.bv_val, opc->suuid.bv_len );
1504                 se->se_uuid.bv_len = opc->suuid.bv_len;
1505
1506                 se->se_csn.bv_val = se->se_uuid.bv_val + opc->suuid.bv_len;
1507                 AC_MEMCPY( se->se_csn.bv_val, op->o_csn.bv_val, op->o_csn.bv_len );
1508                 se->se_csn.bv_val[op->o_csn.bv_len] = '\0';
1509                 se->se_csn.bv_len = op->o_csn.bv_len;
1510                 se->se_sid = slap_parse_csn_sid( &se->se_csn );
1511
1512                 ldap_pvt_thread_mutex_lock( &sl->sl_mutex );
1513                 if ( sl->sl_head ) {
1514                         sl->sl_tail->se_next = se;
1515                 } else {
1516                         sl->sl_head = se;
1517                 }
1518                 sl->sl_tail = se;
1519                 sl->sl_num++;
1520                 while ( sl->sl_num > sl->sl_size ) {
1521                         se = sl->sl_head;
1522                         sl->sl_head = se->se_next;
1523                         strcpy( sl->sl_mincsn.bv_val, se->se_csn.bv_val );
1524                         sl->sl_mincsn.bv_len = se->se_csn.bv_len;
1525                         ch_free( se );
1526                         sl->sl_num--;
1527                 }
1528                 ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
1529         }
1530 }
1531
1532 /* Just set a flag if we found the matching entry */
1533 static int
1534 playlog_cb( Operation *op, SlapReply *rs )
1535 {
1536         if ( rs->sr_type == REP_SEARCH ) {
1537                 op->o_callback->sc_private = (void *)1;
1538         }
1539         return rs->sr_err;
1540 }
1541
1542 /* enter with sl->sl_mutex locked, release before returning */
1543 static void
1544 syncprov_playlog( Operation *op, SlapReply *rs, sessionlog *sl,
1545         sync_control *srs, BerVarray ctxcsn, int numcsns, int *sids )
1546 {
1547         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
1548         slog_entry *se;
1549         int i, j, ndel, num, nmods, mmods;
1550         char cbuf[LDAP_PVT_CSNSTR_BUFSIZE];
1551         BerVarray uuids;
1552         struct berval delcsn[2];
1553
1554         if ( !sl->sl_num ) {
1555                 ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
1556                 return;
1557         }
1558
1559         num = sl->sl_num;
1560         i = 0;
1561         nmods = 0;
1562
1563         uuids = op->o_tmpalloc( (num+1) * sizeof( struct berval ) +
1564                 num * UUID_LEN, op->o_tmpmemctx );
1565         uuids[0].bv_val = (char *)(uuids + num + 1);
1566
1567         delcsn[0].bv_len = 0;
1568         delcsn[0].bv_val = cbuf;
1569         BER_BVZERO(&delcsn[1]);
1570
1571         /* Make a copy of the relevant UUIDs. Put the Deletes up front
1572          * and everything else at the end. Do this first so we can
1573          * unlock the list mutex.
1574          */
1575         Debug( LDAP_DEBUG_SYNC, "srs csn %s\n",
1576                 srs->sr_state.ctxcsn[0].bv_val, 0, 0 );
1577         for ( se=sl->sl_head; se; se=se->se_next ) {
1578                 int k;
1579                 Debug( LDAP_DEBUG_SYNC, "log csn %s\n", se->se_csn.bv_val, 0, 0 );
1580                 ndel = 1;
1581                 for ( k=0; k<srs->sr_state.numcsns; k++ ) {
1582                         if ( se->se_sid == srs->sr_state.sids[k] ) {
1583                                 ndel = ber_bvcmp( &se->se_csn, &srs->sr_state.ctxcsn[k] );
1584                                 break;
1585                         }
1586                 }
1587                 if ( ndel <= 0 ) {
1588                         Debug( LDAP_DEBUG_SYNC, "cmp %d, too old\n", ndel, 0, 0 );
1589                         continue;
1590                 }
1591                 ndel = 0;
1592                 for ( k=0; k<numcsns; k++ ) {
1593                         if ( se->se_sid == sids[k] ) {
1594                                 ndel = ber_bvcmp( &se->se_csn, &ctxcsn[k] );
1595                                 break;
1596                         }
1597                 }
1598                 if ( ndel > 0 ) {
1599                         Debug( LDAP_DEBUG_SYNC, "cmp %d, too new\n", ndel, 0, 0 );
1600                         break;
1601                 }
1602                 if ( se->se_tag == LDAP_REQ_DELETE ) {
1603                         j = i;
1604                         i++;
1605                         AC_MEMCPY( cbuf, se->se_csn.bv_val, se->se_csn.bv_len );
1606                         delcsn[0].bv_len = se->se_csn.bv_len;
1607                         delcsn[0].bv_val[delcsn[0].bv_len] = '\0';
1608                 } else {
1609                         nmods++;
1610                         j = num - nmods;
1611                 }
1612                 uuids[j].bv_val = uuids[0].bv_val + (j * UUID_LEN);
1613                 AC_MEMCPY(uuids[j].bv_val, se->se_uuid.bv_val, UUID_LEN);
1614                 uuids[j].bv_len = UUID_LEN;
1615         }
1616         ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
1617
1618         ndel = i;
1619
1620         /* Zero out unused slots */
1621         for ( i=ndel; i < num - nmods; i++ )
1622                 uuids[i].bv_len = 0;
1623
1624         /* Mods must be validated to see if they belong in this delete set.
1625          */
1626
1627         mmods = nmods;
1628         /* Strip any duplicates */
1629         for ( i=0; i<nmods; i++ ) {
1630                 for ( j=0; j<ndel; j++ ) {
1631                         if ( bvmatch( &uuids[j], &uuids[num - 1 - i] )) {
1632                                 uuids[num - 1 - i].bv_len = 0;
1633                                 mmods --;
1634                                 break;
1635                         }
1636                 }
1637                 if ( uuids[num - 1 - i].bv_len == 0 ) continue;
1638                 for ( j=0; j<i; j++ ) {
1639                         if ( bvmatch( &uuids[num - 1 - j], &uuids[num - 1 - i] )) {
1640                                 uuids[num - 1 - i].bv_len = 0;
1641                                 mmods --;
1642                                 break;
1643                         }
1644                 }
1645         }
1646
1647         if ( mmods ) {
1648                 Operation fop;
1649                 SlapReply frs = { REP_RESULT };
1650                 int rc;
1651                 Filter mf, af;
1652                 AttributeAssertion eq = ATTRIBUTEASSERTION_INIT;
1653                 slap_callback cb = {0};
1654
1655                 fop = *op;
1656
1657                 fop.o_sync_mode = 0;
1658                 fop.o_callback = &cb;
1659                 fop.ors_limit = NULL;
1660                 fop.ors_tlimit = SLAP_NO_LIMIT;
1661                 fop.ors_attrs = slap_anlist_all_attributes;
1662                 fop.ors_attrsonly = 0;
1663                 fop.o_managedsait = SLAP_CONTROL_CRITICAL;
1664
1665                 af.f_choice = LDAP_FILTER_AND;
1666                 af.f_next = NULL;
1667                 af.f_and = &mf;
1668                 mf.f_choice = LDAP_FILTER_EQUALITY;
1669                 mf.f_ava = &eq;
1670                 mf.f_av_desc = slap_schema.si_ad_entryUUID;
1671                 mf.f_next = fop.ors_filter;
1672
1673                 fop.ors_filter = &af;
1674
1675                 cb.sc_response = playlog_cb;
1676                 fop.o_bd->bd_info = (BackendInfo *)on->on_info;
1677
1678                 for ( i=ndel; i<num; i++ ) {
1679                         if ( uuids[i].bv_len == 0 ) continue;
1680
1681                         mf.f_av_value = uuids[i];
1682                         cb.sc_private = NULL;
1683                         fop.ors_slimit = 1;
1684                         frs.sr_nentries = 0;
1685                         rc = fop.o_bd->be_search( &fop, &frs );
1686
1687                         /* If entry was not found, add to delete list */
1688                         if ( !cb.sc_private ) {
1689                                 uuids[ndel++] = uuids[i];
1690                         }
1691                 }
1692                 fop.o_bd->bd_info = (BackendInfo *)on;
1693         }
1694         if ( ndel ) {
1695                 struct berval cookie;
1696
1697                 if ( delcsn[0].bv_len ) {
1698                         slap_compose_sync_cookie( op, &cookie, delcsn, srs->sr_state.rid,
1699                                 slap_serverID ? slap_serverID : -1 );
1700
1701                         Debug( LDAP_DEBUG_SYNC, "syncprov_playlog: cookie=%s\n", cookie.bv_val, 0, 0 );
1702                 }
1703
1704                 uuids[ndel].bv_val = NULL;
1705                 syncprov_sendinfo( op, rs, LDAP_TAG_SYNC_ID_SET,
1706                         delcsn[0].bv_len ? &cookie : NULL, 0, uuids, 1 );
1707                 if ( delcsn[0].bv_len ) {
1708                         op->o_tmpfree( cookie.bv_val, op->o_tmpmemctx );
1709                 }
1710         }
1711         op->o_tmpfree( uuids, op->o_tmpmemctx );
1712 }
1713
1714 static int
1715 syncprov_op_response( Operation *op, SlapReply *rs )
1716 {
1717         opcookie *opc = op->o_callback->sc_private;
1718         slap_overinst *on = opc->son;
1719         syncprov_info_t         *si = on->on_bi.bi_private;
1720         syncmatches *sm;
1721
1722         if ( rs->sr_err == LDAP_SUCCESS )
1723         {
1724                 struct berval maxcsn;
1725                 char cbuf[LDAP_PVT_CSNSTR_BUFSIZE];
1726                 int do_check = 0, have_psearches, foundit, csn_changed = 0;
1727
1728                 ldap_pvt_thread_mutex_lock( &si->si_resp_mutex );
1729
1730                 /* Update our context CSN */
1731                 cbuf[0] = '\0';
1732                 maxcsn.bv_val = cbuf;
1733                 maxcsn.bv_len = sizeof(cbuf);
1734                 ldap_pvt_thread_rdwr_wlock( &si->si_csn_rwlock );
1735
1736                 slap_get_commit_csn( op, &maxcsn, &foundit );
1737                 if ( BER_BVISEMPTY( &maxcsn ) && SLAP_GLUE_SUBORDINATE( op->o_bd )) {
1738                         /* syncrepl queues the CSN values in the db where
1739                          * it is configured , not where the changes are made.
1740                          * So look for a value in the glue db if we didn't
1741                          * find any in this db.
1742                          */
1743                         BackendDB *be = op->o_bd;
1744                         op->o_bd = select_backend( &be->be_nsuffix[0], 1);
1745                         maxcsn.bv_val = cbuf;
1746                         maxcsn.bv_len = sizeof(cbuf);
1747                         slap_get_commit_csn( op, &maxcsn, &foundit );
1748                         op->o_bd = be;
1749                 }
1750                 if ( !BER_BVISEMPTY( &maxcsn ) ) {
1751                         int i, sid;
1752 #ifdef CHECK_CSN
1753                         Syntax *syn = slap_schema.si_ad_contextCSN->ad_type->sat_syntax;
1754                         assert( !syn->ssyn_validate( syn, &maxcsn ));
1755 #endif
1756                         sid = slap_parse_csn_sid( &maxcsn );
1757                         for ( i=0; i<si->si_numcsns; i++ ) {
1758                                 if ( sid == si->si_sids[i] ) {
1759                                         if ( ber_bvcmp( &maxcsn, &si->si_ctxcsn[i] ) > 0 ) {
1760                                                 ber_bvreplace( &si->si_ctxcsn[i], &maxcsn );
1761                                                 csn_changed = 1;
1762                                         }
1763                                         break;
1764                                 }
1765                         }
1766                         /* It's a new SID for us */
1767                         if ( i == si->si_numcsns ) {
1768                                 value_add_one( &si->si_ctxcsn, &maxcsn );
1769                                 csn_changed = 1;
1770                                 si->si_numcsns++;
1771                                 si->si_sids = ch_realloc( si->si_sids, si->si_numcsns *
1772                                         sizeof(int));
1773                                 si->si_sids[i] = sid;
1774                         }
1775                 }
1776
1777                 /* Don't do any processing for consumer contextCSN updates */
1778                 if ( op->o_dont_replicate ) {
1779                         if ( op->o_tag == LDAP_REQ_MODIFY &&
1780                                 op->orm_modlist->sml_op == LDAP_MOD_REPLACE &&
1781                                 op->orm_modlist->sml_desc == slap_schema.si_ad_contextCSN ) {
1782                         /* Catch contextCSN updates from syncrepl. We have to look at
1783                          * all the attribute values, as there may be more than one csn
1784                          * that changed, and only one can be passed in the csn queue.
1785                          */
1786                         Modifications *mod = op->orm_modlist;
1787                         int i, j, sid;
1788
1789                         for ( i=0; i<mod->sml_numvals; i++ ) {
1790                                 sid = slap_parse_csn_sid( &mod->sml_values[i] );
1791                                 for ( j=0; j<si->si_numcsns; j++ ) {
1792                                         if ( sid == si->si_sids[j] ) {
1793                                                 if ( ber_bvcmp( &mod->sml_values[i], &si->si_ctxcsn[j] ) > 0 ) {
1794                                                         ber_bvreplace( &si->si_ctxcsn[j], &mod->sml_values[i] );
1795                                                         csn_changed = 1;
1796                                                 }
1797                                                 break;
1798                                         }
1799                                 }
1800
1801                                 if ( j == si->si_numcsns ) {
1802                                         value_add_one( &si->si_ctxcsn, &mod->sml_values[i] );
1803                                         si->si_numcsns++;
1804                                         si->si_sids = ch_realloc( si->si_sids, si->si_numcsns *
1805                                                 sizeof(int));
1806                                         si->si_sids[j] = sid;
1807                                         csn_changed = 1;
1808                                 }
1809                         }
1810                         ldap_pvt_thread_rdwr_wunlock( &si->si_csn_rwlock );
1811
1812                         if ( csn_changed ) {
1813                                 ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
1814                                 have_psearches = ( si->si_ops != NULL );
1815                                 ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
1816
1817                                 if ( have_psearches ) {
1818                                         for ( sm = opc->smatches; sm; sm=sm->sm_next ) {
1819                                                 if ( sm->sm_op->s_op->o_abandon )
1820                                                         continue;
1821                                                 syncprov_qresp( opc, sm->sm_op, LDAP_SYNC_NEW_COOKIE );
1822                                         }
1823                                 }
1824                         }
1825                         } else {
1826                         ldap_pvt_thread_rdwr_wunlock( &si->si_csn_rwlock );
1827                         }
1828                         goto leave;
1829                 }
1830
1831                 si->si_numops++;
1832                 if ( si->si_chkops || si->si_chktime ) {
1833                         /* Never checkpoint adding the context entry,
1834                          * it will deadlock
1835                          */
1836                         if ( op->o_tag != LDAP_REQ_ADD ||
1837                                 !dn_match( &op->o_req_ndn, &si->si_contextdn )) {
1838                                 if ( si->si_chkops && si->si_numops >= si->si_chkops ) {
1839                                         do_check = 1;
1840                                         si->si_numops = 0;
1841                                 }
1842                                 if ( si->si_chktime &&
1843                                         (op->o_time - si->si_chklast >= si->si_chktime )) {
1844                                         if ( si->si_chklast ) {
1845                                                 do_check = 1;
1846                                                 si->si_chklast = op->o_time;
1847                                         } else {
1848                                                 si->si_chklast = 1;
1849                                         }
1850                                 }
1851                         }
1852                 }
1853                 ldap_pvt_thread_rdwr_wunlock( &si->si_csn_rwlock );
1854
1855                 if ( do_check ) {
1856                         ldap_pvt_thread_rdwr_rlock( &si->si_csn_rwlock );
1857                         syncprov_checkpoint( op, rs, on );
1858                         ldap_pvt_thread_rdwr_runlock( &si->si_csn_rwlock );
1859                 }
1860
1861                 /* only update consumer ctx if this is a newer csn */
1862                 if ( csn_changed ) {
1863                         opc->sctxcsn = maxcsn;
1864                 }
1865
1866                 /* Handle any persistent searches */
1867                 ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
1868                 have_psearches = ( si->si_ops != NULL );
1869                 ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
1870                 if ( have_psearches ) {
1871                         switch(op->o_tag) {
1872                         case LDAP_REQ_ADD:
1873                         case LDAP_REQ_MODIFY:
1874                         case LDAP_REQ_MODRDN:
1875                         case LDAP_REQ_EXTENDED:
1876                                 syncprov_matchops( op, opc, 0 );
1877                                 break;
1878                         case LDAP_REQ_DELETE:
1879                                 /* for each match in opc->smatches:
1880                                  *   send DELETE msg
1881                                  */
1882                                 for ( sm = opc->smatches; sm; sm=sm->sm_next ) {
1883                                         if ( sm->sm_op->s_op->o_abandon )
1884                                                 continue;
1885                                         syncprov_qresp( opc, sm->sm_op, LDAP_SYNC_DELETE );
1886                                 }
1887                                 break;
1888                         }
1889                 }
1890
1891                 /* Add any log records */
1892                 if ( si->si_logs && op->o_tag != LDAP_REQ_ADD ) {
1893                         syncprov_add_slog( op );
1894                 }
1895 leave:          ldap_pvt_thread_mutex_unlock( &si->si_resp_mutex );
1896         }
1897         return SLAP_CB_CONTINUE;
1898 }
1899
1900 /* We don't use a subentry to store the context CSN any more.
1901  * We expose the current context CSN as an operational attribute
1902  * of the suffix entry.
1903  */
1904 static int
1905 syncprov_op_compare( Operation *op, SlapReply *rs )
1906 {
1907         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
1908         syncprov_info_t         *si = on->on_bi.bi_private;
1909         int rc = SLAP_CB_CONTINUE;
1910
1911         if ( dn_match( &op->o_req_ndn, &si->si_contextdn ) &&
1912                 op->oq_compare.rs_ava->aa_desc == slap_schema.si_ad_contextCSN )
1913         {
1914                 Entry e = {0};
1915                 Attribute a = {0};
1916
1917                 e.e_name = si->si_contextdn;
1918                 e.e_nname = si->si_contextdn;
1919                 e.e_attrs = &a;
1920
1921                 a.a_desc = slap_schema.si_ad_contextCSN;
1922
1923                 ldap_pvt_thread_rdwr_rlock( &si->si_csn_rwlock );
1924
1925                 a.a_vals = si->si_ctxcsn;
1926                 a.a_nvals = a.a_vals;
1927                 a.a_numvals = si->si_numcsns;
1928
1929                 rs->sr_err = access_allowed( op, &e, op->oq_compare.rs_ava->aa_desc,
1930                         &op->oq_compare.rs_ava->aa_value, ACL_COMPARE, NULL );
1931                 if ( ! rs->sr_err ) {
1932                         rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
1933                         goto return_results;
1934                 }
1935
1936                 if ( get_assert( op ) &&
1937                         ( test_filter( op, &e, get_assertion( op ) ) != LDAP_COMPARE_TRUE ) )
1938                 {
1939                         rs->sr_err = LDAP_ASSERTION_FAILED;
1940                         goto return_results;
1941                 }
1942
1943
1944                 rs->sr_err = LDAP_COMPARE_FALSE;
1945
1946                 if ( attr_valfind( &a,
1947                         SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
1948                                 SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
1949                                 &op->oq_compare.rs_ava->aa_value, NULL, op->o_tmpmemctx ) == 0 )
1950                 {
1951                         rs->sr_err = LDAP_COMPARE_TRUE;
1952                 }
1953
1954 return_results:;
1955
1956                 ldap_pvt_thread_rdwr_runlock( &si->si_csn_rwlock );
1957
1958                 send_ldap_result( op, rs );
1959
1960                 if( rs->sr_err == LDAP_COMPARE_FALSE || rs->sr_err == LDAP_COMPARE_TRUE ) {
1961                         rs->sr_err = LDAP_SUCCESS;
1962                 }
1963                 rc = rs->sr_err;
1964         }
1965
1966         return rc;
1967 }
1968
1969 static int
1970 syncprov_op_mod( Operation *op, SlapReply *rs )
1971 {
1972         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
1973         syncprov_info_t         *si = on->on_bi.bi_private;
1974         slap_callback *cb;
1975         opcookie *opc;
1976         int have_psearches, cbsize;
1977
1978         ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
1979         have_psearches = ( si->si_ops != NULL );
1980         ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
1981
1982         cbsize = sizeof(slap_callback) + sizeof(opcookie) +
1983                 (have_psearches ? sizeof(modinst) : 0 );
1984
1985         cb = op->o_tmpcalloc(1, cbsize, op->o_tmpmemctx);
1986         opc = (opcookie *)(cb+1);
1987         opc->son = on;
1988         cb->sc_response = syncprov_op_response;
1989         cb->sc_cleanup = syncprov_op_cleanup;
1990         cb->sc_private = opc;
1991         cb->sc_next = op->o_callback;
1992         op->o_callback = cb;
1993
1994         opc->osid = -1;
1995         opc->rsid = -1;
1996         if ( op->o_csn.bv_val ) {
1997                 opc->osid = slap_parse_csn_sid( &op->o_csn );
1998         }
1999         if ( op->o_controls ) {
2000                 struct sync_cookie *scook =
2001                 op->o_controls[slap_cids.sc_LDAPsync];
2002                 if ( scook )
2003                         opc->rsid = scook->sid;
2004         }
2005
2006         /* If there are active persistent searches, lock this operation.
2007          * See seqmod.c for the locking logic on its own.
2008          */
2009         if ( have_psearches ) {
2010                 modtarget *mt, mtdummy;
2011                 modinst *mi;
2012
2013                 mi = (modinst *)(opc+1);
2014                 mi->mi_op = op;
2015
2016                 /* See if we're already modifying this entry... */
2017                 mtdummy.mt_op = op;
2018                 ldap_pvt_thread_mutex_lock( &si->si_mods_mutex );
2019                 mt = avl_find( si->si_mods, &mtdummy, sp_avl_cmp );
2020                 if ( mt ) {
2021                         ldap_pvt_thread_mutex_lock( &mt->mt_mutex );
2022                         if ( mt->mt_mods == NULL ) {
2023                                 /* Cannot reuse this mt, as another thread is about
2024                                  * to release it in syncprov_op_cleanup.
2025                                  */
2026                                 ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
2027                                 mt = NULL;
2028                         }
2029                 }
2030                 if ( mt ) {
2031                         ldap_pvt_thread_mutex_unlock( &si->si_mods_mutex );
2032                         mt->mt_tail->mi_next = mi;
2033                         mt->mt_tail = mi;
2034                         /* wait for this op to get to head of list */
2035                         while ( mt->mt_mods != mi ) {
2036                                 ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
2037                                 /* FIXME: if dynamic config can delete overlays or
2038                                  * databases we'll have to check for cleanup here.
2039                                  * Currently it's not an issue because there are
2040                                  * no dynamic config deletes...
2041                                  */
2042                                 if ( slapd_shutdown )
2043                                         return SLAPD_ABANDON;
2044
2045                                 if ( !ldap_pvt_thread_pool_pausecheck( &connection_pool ))
2046                                         ldap_pvt_thread_yield();
2047                                 ldap_pvt_thread_mutex_lock( &mt->mt_mutex );
2048
2049                                 /* clean up if the caller is giving up */
2050                                 if ( op->o_abandon ) {
2051                                         modinst *m2;
2052                                         for ( m2 = mt->mt_mods; m2->mi_next != mi;
2053                                                 m2 = m2->mi_next );
2054                                         m2->mi_next = mi->mi_next;
2055                                         if ( mt->mt_tail == mi ) mt->mt_tail = m2;
2056                                         op->o_tmpfree( cb, op->o_tmpmemctx );
2057                                         ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
2058                                         return SLAPD_ABANDON;
2059                                 }
2060                         }
2061                         ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
2062                 } else {
2063                         /* Record that we're modifying this entry now */
2064                         mt = ch_malloc( sizeof(modtarget) );
2065                         mt->mt_mods = mi;
2066                         mt->mt_tail = mi;
2067                         mt->mt_op = mi->mi_op;
2068                         ldap_pvt_thread_mutex_init( &mt->mt_mutex );
2069                         avl_insert( &si->si_mods, mt, sp_avl_cmp, avl_dup_error );
2070                         ldap_pvt_thread_mutex_unlock( &si->si_mods_mutex );
2071                 }
2072                 opc->smt = mt;
2073         }
2074
2075         if (( have_psearches || si->si_logs ) && op->o_tag != LDAP_REQ_ADD )
2076                 syncprov_matchops( op, opc, 1 );
2077
2078         return SLAP_CB_CONTINUE;
2079 }
2080
2081 static int
2082 syncprov_op_extended( Operation *op, SlapReply *rs )
2083 {
2084         if ( exop_is_write( op ))
2085                 return syncprov_op_mod( op, rs );
2086
2087         return SLAP_CB_CONTINUE;
2088 }
2089
2090 typedef struct searchstate {
2091         slap_overinst *ss_on;
2092         syncops *ss_so;
2093         BerVarray ss_ctxcsn;
2094         int *ss_sids;
2095         int ss_numcsns;
2096 #define SS_PRESENT      0x01
2097 #define SS_CHANGED      0x02
2098         int ss_flags;
2099 } searchstate;
2100
2101 static int
2102 syncprov_search_cleanup( Operation *op, SlapReply *rs )
2103 {
2104         if ( rs->sr_ctrls ) {
2105                 op->o_tmpfree( rs->sr_ctrls[0], op->o_tmpmemctx );
2106                 op->o_tmpfree( rs->sr_ctrls, op->o_tmpmemctx );
2107                 rs->sr_ctrls = NULL;
2108         }
2109         return 0;
2110 }
2111
2112 typedef struct SyncOperationBuffer {
2113         Operation               sob_op;
2114         Opheader                sob_hdr;
2115         OpExtra                 sob_oe;
2116         AttributeName   sob_extra;      /* not always present */
2117         /* Further data allocated here */
2118 } SyncOperationBuffer;
2119
2120 static void
2121 syncprov_detach_op( Operation *op, syncops *so, slap_overinst *on )
2122 {
2123         SyncOperationBuffer *sopbuf2;
2124         Operation *op2;
2125         int i, alen = 0;
2126         size_t size;
2127         char *ptr;
2128         GroupAssertion *g1, *g2;
2129
2130         /* count the search attrs */
2131         for (i=0; op->ors_attrs && !BER_BVISNULL( &op->ors_attrs[i].an_name ); i++) {
2132                 alen += op->ors_attrs[i].an_name.bv_len + 1;
2133         }
2134         /* Make a new copy of the operation */
2135         size = offsetof( SyncOperationBuffer, sob_extra ) +
2136                 (i ? ( (i+1) * sizeof(AttributeName) + alen) : 0) +
2137                 op->o_req_dn.bv_len + 1 +
2138                 op->o_req_ndn.bv_len + 1 +
2139                 op->o_ndn.bv_len + 1 +
2140                 so->s_filterstr.bv_len + 1;
2141         sopbuf2 = ch_calloc( 1, size );
2142         op2 = &sopbuf2->sob_op;
2143         op2->o_hdr = &sopbuf2->sob_hdr;
2144         LDAP_SLIST_FIRST(&op2->o_extra) = &sopbuf2->sob_oe;
2145
2146         /* Copy the fields we care about explicitly, leave the rest alone */
2147         *op2->o_hdr = *op->o_hdr;
2148         op2->o_tag = op->o_tag;
2149         op2->o_time = op->o_time;
2150         op2->o_bd = on->on_info->oi_origdb;
2151         op2->o_request = op->o_request;
2152         op2->o_managedsait = op->o_managedsait;
2153         LDAP_SLIST_FIRST(&op2->o_extra)->oe_key = on;
2154         LDAP_SLIST_NEXT(LDAP_SLIST_FIRST(&op2->o_extra), oe_next) = NULL;
2155
2156         ptr = (char *) sopbuf2 + offsetof( SyncOperationBuffer, sob_extra );
2157         if ( i ) {
2158                 op2->ors_attrs = (AttributeName *) ptr;
2159                 ptr = (char *) &op2->ors_attrs[i+1];
2160                 for (i=0; !BER_BVISNULL( &op->ors_attrs[i].an_name ); i++) {
2161                         op2->ors_attrs[i] = op->ors_attrs[i];
2162                         op2->ors_attrs[i].an_name.bv_val = ptr;
2163                         ptr = lutil_strcopy( ptr, op->ors_attrs[i].an_name.bv_val ) + 1;
2164                 }
2165                 BER_BVZERO( &op2->ors_attrs[i].an_name );
2166         }
2167
2168         op2->o_authz = op->o_authz;
2169         op2->o_ndn.bv_val = ptr;
2170         ptr = lutil_strcopy(ptr, op->o_ndn.bv_val) + 1;
2171         op2->o_dn = op2->o_ndn;
2172         op2->o_req_dn.bv_len = op->o_req_dn.bv_len;
2173         op2->o_req_dn.bv_val = ptr;
2174         ptr = lutil_strcopy(ptr, op->o_req_dn.bv_val) + 1;
2175         op2->o_req_ndn.bv_len = op->o_req_ndn.bv_len;
2176         op2->o_req_ndn.bv_val = ptr;
2177         ptr = lutil_strcopy(ptr, op->o_req_ndn.bv_val) + 1;
2178         op2->ors_filterstr.bv_val = ptr;
2179         strcpy( ptr, so->s_filterstr.bv_val );
2180         op2->ors_filterstr.bv_len = so->s_filterstr.bv_len;
2181
2182         /* Skip the AND/GE clause that we stuck on in front */
2183         if ( so->s_flags & PS_FIX_FILTER ) {
2184                 op2->ors_filter = op->ors_filter->f_and->f_next;
2185                 so->s_flags ^= PS_FIX_FILTER;
2186         } else {
2187                 op2->ors_filter = op->ors_filter;
2188         }
2189         op2->ors_filter = filter_dup( op2->ors_filter, NULL );
2190         so->s_op = op2;
2191
2192         /* Copy any cached group ACLs individually */
2193         op2->o_groups = NULL;
2194         for ( g1=op->o_groups; g1; g1=g1->ga_next ) {
2195                 g2 = ch_malloc( sizeof(GroupAssertion) + g1->ga_len );
2196                 *g2 = *g1;
2197                 strcpy( g2->ga_ndn, g1->ga_ndn );
2198                 g2->ga_next = op2->o_groups;
2199                 op2->o_groups = g2;
2200         }
2201         /* Don't allow any further group caching */
2202         op2->o_do_not_cache = 1;
2203
2204         /* Add op2 to conn so abandon will find us */
2205         op->o_conn->c_n_ops_executing++;
2206         op->o_conn->c_n_ops_completed--;
2207         LDAP_STAILQ_INSERT_TAIL( &op->o_conn->c_ops, op2, o_next );
2208         so->s_flags |= PS_IS_DETACHED;
2209
2210         /* Prevent anyone else from trying to send a result for this op */
2211         op->o_abandon = 1;
2212 }
2213
2214 static int
2215 syncprov_search_response( Operation *op, SlapReply *rs )
2216 {
2217         searchstate *ss = op->o_callback->sc_private;
2218         slap_overinst *on = ss->ss_on;
2219         syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
2220         sync_control *srs = op->o_controls[slap_cids.sc_LDAPsync];
2221
2222         if ( rs->sr_type == REP_SEARCH || rs->sr_type == REP_SEARCHREF ) {
2223                 Attribute *a;
2224                 /* If we got a referral without a referral object, there's
2225                  * something missing that we cannot replicate. Just ignore it.
2226                  * The consumer will abort because we didn't send the expected
2227                  * control.
2228                  */
2229                 if ( !rs->sr_entry ) {
2230                         assert( rs->sr_entry != NULL );
2231                         Debug( LDAP_DEBUG_ANY, "bogus referral in context\n",0,0,0 );
2232                         return SLAP_CB_CONTINUE;
2233                 }
2234                 a = attr_find( rs->sr_entry->e_attrs, slap_schema.si_ad_entryCSN );
2235                 if ( a == NULL && rs->sr_operational_attrs != NULL ) {
2236                         a = attr_find( rs->sr_operational_attrs, slap_schema.si_ad_entryCSN );
2237                 }
2238                 if ( a ) {
2239                         int i, sid;
2240                         sid = slap_parse_csn_sid( &a->a_nvals[0] );
2241
2242                         /* Don't send changed entries back to the originator */
2243                         if ( sid == srs->sr_state.sid && srs->sr_state.numcsns ) {
2244                                 Debug( LDAP_DEBUG_SYNC,
2245                                         "Entry %s changed by peer, ignored\n",
2246                                         rs->sr_entry->e_name.bv_val, 0, 0 );
2247                                 return LDAP_SUCCESS;
2248                         }
2249
2250                         /* If not a persistent search */
2251                         if ( !ss->ss_so ) {
2252                                 /* Make sure entry is less than the snapshot'd contextCSN */
2253                                 for ( i=0; i<ss->ss_numcsns; i++ ) {
2254                                         if ( sid == ss->ss_sids[i] && ber_bvcmp( &a->a_nvals[0],
2255                                                 &ss->ss_ctxcsn[i] ) > 0 ) {
2256                                                 Debug( LDAP_DEBUG_SYNC,
2257                                                         "Entry %s CSN %s greater than snapshot %s\n",
2258                                                         rs->sr_entry->e_name.bv_val,
2259                                                         a->a_nvals[0].bv_val,
2260                                                         ss->ss_ctxcsn[i].bv_val );
2261                                                 return LDAP_SUCCESS;
2262                                         }
2263                                 }
2264                         }
2265
2266                         /* Don't send old entries twice */
2267                         if ( srs->sr_state.ctxcsn ) {
2268                                 for ( i=0; i<srs->sr_state.numcsns; i++ ) {
2269                                         if ( sid == srs->sr_state.sids[i] &&
2270                                                 ber_bvcmp( &a->a_nvals[0],
2271                                                         &srs->sr_state.ctxcsn[i] )<= 0 ) {
2272                                                 Debug( LDAP_DEBUG_SYNC,
2273                                                         "Entry %s CSN %s older or equal to ctx %s\n",
2274                                                         rs->sr_entry->e_name.bv_val,
2275                                                         a->a_nvals[0].bv_val,
2276                                                         srs->sr_state.ctxcsn[i].bv_val );
2277                                                 return LDAP_SUCCESS;
2278                                         }
2279                                 }
2280                         }
2281                 }
2282                 rs->sr_ctrls = op->o_tmpalloc( sizeof(LDAPControl *)*2,
2283                         op->o_tmpmemctx );
2284                 rs->sr_ctrls[1] = NULL;
2285                 /* If we're in delta-sync mode, always send a cookie */
2286                 if ( si->si_nopres && si->si_usehint && a ) {
2287                         struct berval cookie;
2288                         slap_compose_sync_cookie( op, &cookie, a->a_nvals, srs->sr_state.rid, slap_serverID ? slap_serverID : -1 );
2289                         rs->sr_err = syncprov_state_ctrl( op, rs, rs->sr_entry,
2290                                 LDAP_SYNC_ADD, rs->sr_ctrls, 0, 1, &cookie );
2291                 } else {
2292                         rs->sr_err = syncprov_state_ctrl( op, rs, rs->sr_entry,
2293                                 LDAP_SYNC_ADD, rs->sr_ctrls, 0, 0, NULL );
2294                 }
2295         } else if ( rs->sr_type == REP_RESULT && rs->sr_err == LDAP_SUCCESS ) {
2296                 struct berval cookie = BER_BVNULL;
2297
2298                 if ( ( ss->ss_flags & SS_CHANGED ) &&
2299                         ss->ss_ctxcsn && !BER_BVISNULL( &ss->ss_ctxcsn[0] )) {
2300                         slap_compose_sync_cookie( op, &cookie, ss->ss_ctxcsn,
2301                                 srs->sr_state.rid, slap_serverID ? slap_serverID : -1 );
2302
2303                         Debug( LDAP_DEBUG_SYNC, "syncprov_search_response: cookie=%s\n", cookie.bv_val, 0, 0 );
2304                 }
2305
2306                 /* Is this a regular refresh?
2307                  * Note: refresh never gets here if there were no changes
2308                  */
2309                 if ( !ss->ss_so ) {
2310                         rs->sr_ctrls = op->o_tmpalloc( sizeof(LDAPControl *)*2,
2311                                 op->o_tmpmemctx );
2312                         rs->sr_ctrls[1] = NULL;
2313                         rs->sr_err = syncprov_done_ctrl( op, rs, rs->sr_ctrls,
2314                                 0, 1, &cookie, ( ss->ss_flags & SS_PRESENT ) ?  LDAP_SYNC_REFRESH_PRESENTS :
2315                                         LDAP_SYNC_REFRESH_DELETES );
2316                         op->o_tmpfree( cookie.bv_val, op->o_tmpmemctx );
2317                 } else {
2318                 /* It's RefreshAndPersist, transition to Persist phase */
2319                         syncprov_sendinfo( op, rs, ( ss->ss_flags & SS_PRESENT ) ?
2320                                 LDAP_TAG_SYNC_REFRESH_PRESENT : LDAP_TAG_SYNC_REFRESH_DELETE,
2321                                 ( ss->ss_flags & SS_CHANGED ) ? &cookie : NULL,
2322                                 1, NULL, 0 );
2323                         if ( !BER_BVISNULL( &cookie ))
2324                                 op->o_tmpfree( cookie.bv_val, op->o_tmpmemctx );
2325
2326                         /* Detach this Op from frontend control */
2327                         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
2328
2329                         /* But not if this connection was closed along the way */
2330                         if ( op->o_abandon ) {
2331                                 ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
2332                                 /* syncprov_ab_cleanup will free this syncop */
2333                                 return SLAPD_ABANDON;
2334
2335                         } else {
2336                                 ldap_pvt_thread_mutex_lock( &ss->ss_so->s_mutex );
2337                                 /* Turn off the refreshing flag */
2338                                 ss->ss_so->s_flags ^= PS_IS_REFRESHING;
2339
2340                                 syncprov_detach_op( op, ss->ss_so, on );
2341
2342                                 ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
2343
2344                                 /* If there are queued responses, fire them off */
2345                                 if ( ss->ss_so->s_res )
2346                                         syncprov_qstart( ss->ss_so );
2347                                 ldap_pvt_thread_mutex_unlock( &ss->ss_so->s_mutex );
2348                         }
2349
2350                         return LDAP_SUCCESS;
2351                 }
2352         }
2353
2354         return SLAP_CB_CONTINUE;
2355 }
2356
2357 static int
2358 syncprov_op_search( Operation *op, SlapReply *rs )
2359 {
2360         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
2361         syncprov_info_t         *si = (syncprov_info_t *)on->on_bi.bi_private;
2362         slap_callback   *cb;
2363         int gotstate = 0, changed = 0, do_present = 0;
2364         syncops *sop = NULL;
2365         searchstate *ss;
2366         sync_control *srs;
2367         BerVarray ctxcsn;
2368         int i, *sids, numcsns;
2369         struct berval mincsn;
2370
2371         if ( !(op->o_sync_mode & SLAP_SYNC_REFRESH) ) return SLAP_CB_CONTINUE;
2372
2373         if ( op->ors_deref & LDAP_DEREF_SEARCHING ) {
2374                 send_ldap_error( op, rs, LDAP_PROTOCOL_ERROR, "illegal value for derefAliases" );
2375                 return rs->sr_err;
2376         }
2377
2378         srs = op->o_controls[slap_cids.sc_LDAPsync];
2379
2380         /* If this is a persistent search, set it up right away */
2381         if ( op->o_sync_mode & SLAP_SYNC_PERSIST ) {
2382                 syncops so = {0};
2383                 fbase_cookie fc;
2384                 opcookie opc;
2385                 slap_callback sc;
2386
2387                 fc.fss = &so;
2388                 fc.fbase = 0;
2389                 so.s_eid = NOID;
2390                 so.s_op = op;
2391                 so.s_flags = PS_IS_REFRESHING | PS_FIND_BASE;
2392                 /* syncprov_findbase expects to be called as a callback... */
2393                 sc.sc_private = &opc;
2394                 opc.son = on;
2395                 ldap_pvt_thread_mutex_init( &so.s_mutex );
2396                 cb = op->o_callback;
2397                 op->o_callback = &sc;
2398                 rs->sr_err = syncprov_findbase( op, &fc );
2399                 op->o_callback = cb;
2400                 ldap_pvt_thread_mutex_destroy( &so.s_mutex );
2401
2402                 if ( rs->sr_err != LDAP_SUCCESS ) {
2403                         send_ldap_result( op, rs );
2404                         return rs->sr_err;
2405                 }
2406                 sop = ch_malloc( sizeof( syncops ));
2407                 *sop = so;
2408                 ldap_pvt_thread_mutex_init( &sop->s_mutex );
2409                 sop->s_rid = srs->sr_state.rid;
2410                 sop->s_sid = srs->sr_state.sid;
2411                 sop->s_inuse = 1;
2412
2413                 ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
2414                 sop->s_next = si->si_ops;
2415                 si->si_ops = sop;
2416                 ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
2417         }
2418
2419         /* snapshot the ctxcsn */
2420         ldap_pvt_thread_rdwr_rlock( &si->si_csn_rwlock );
2421         numcsns = si->si_numcsns;
2422         if ( numcsns ) {
2423                 ber_bvarray_dup_x( &ctxcsn, si->si_ctxcsn, op->o_tmpmemctx );
2424                 sids = op->o_tmpalloc( numcsns * sizeof(int), op->o_tmpmemctx );
2425                 for ( i=0; i<numcsns; i++ )
2426                         sids[i] = si->si_sids[i];
2427         } else {
2428                 ctxcsn = NULL;
2429                 sids = NULL;
2430         }
2431         ldap_pvt_thread_rdwr_runlock( &si->si_csn_rwlock );
2432
2433         /* If we have a cookie, handle the PRESENT lookups */
2434         if ( srs->sr_state.ctxcsn ) {
2435                 sessionlog *sl;
2436                 int i, j;
2437
2438                 /* If we don't have any CSN of our own yet, pretend nothing
2439                  * has changed.
2440                  */
2441                 if ( !numcsns )
2442                         goto no_change;
2443
2444                 if ( !si->si_nopres )
2445                         do_present = SS_PRESENT;
2446
2447                 /* If there are SIDs we don't recognize in the cookie, drop them */
2448                 for (i=0; i<srs->sr_state.numcsns; ) {
2449                         for (j=0; j<numcsns; j++) {
2450                                 if ( srs->sr_state.sids[i] == sids[j] ) {
2451                                         break;
2452                                 }
2453                         }
2454                         /* not found */
2455                         if ( j == numcsns ) {
2456                                 struct berval tmp = srs->sr_state.ctxcsn[i];
2457                                 j = srs->sr_state.numcsns - 1;
2458                                 srs->sr_state.ctxcsn[i] = srs->sr_state.ctxcsn[j];
2459                                 tmp.bv_len = 0;
2460                                 srs->sr_state.ctxcsn[j] = tmp;
2461                                 srs->sr_state.numcsns = j;
2462                                 srs->sr_state.sids[i] = srs->sr_state.sids[j];
2463                                 continue;
2464                         }
2465                         i++;
2466                 }
2467
2468                 /* Find the smallest CSN */
2469                 mincsn = srs->sr_state.ctxcsn[0];
2470                 for ( i=1; i<srs->sr_state.numcsns; i++ ) {
2471                         if ( ber_bvcmp( &mincsn, &srs->sr_state.ctxcsn[i] ) > 0 )
2472                                 mincsn = srs->sr_state.ctxcsn[i];
2473                 }
2474
2475                 /* If nothing has changed, shortcut it */
2476                 if ( srs->sr_state.numcsns == numcsns ) {
2477                         int i, j, newer;
2478                         for ( i=0; i<srs->sr_state.numcsns; i++ ) {
2479                                 for ( j=0; j<numcsns; j++ ) {
2480                                         if ( srs->sr_state.sids[i] != sids[j] )
2481                                                 continue;
2482                                         newer = ber_bvcmp( &srs->sr_state.ctxcsn[i], &ctxcsn[j] );
2483                                         /* If our state is newer, tell consumer about changes */
2484                                         if ( newer < 0 )
2485                                                 changed = SS_CHANGED;
2486                                         else if ( newer > 0 ) {
2487                                         /* our state is older, tell consumer nothing */
2488                                                 rs->sr_err = LDAP_SUCCESS;
2489 bailout:
2490                                                 if ( sop ) {
2491                                                         syncops **sp = &si->si_ops;
2492
2493                                                         ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
2494                                                         while ( *sp != sop )
2495                                                                 sp = &(*sp)->s_next;
2496                                                         *sp = sop->s_next;
2497                                                         ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
2498                                                         ch_free( sop );
2499                                                 }
2500                                                 rs->sr_ctrls = NULL;
2501                                                 send_ldap_result( op, rs );
2502                                                 return rs->sr_err;
2503                                         }
2504                                         break;
2505                                 }
2506                                 if ( changed )
2507                                         break;
2508                         }
2509                         if ( !changed ) {
2510                                 do_present = 0;
2511 no_change:              if ( !(op->o_sync_mode & SLAP_SYNC_PERSIST) ) {
2512                                         LDAPControl     *ctrls[2];
2513
2514                                         ctrls[0] = NULL;
2515                                         ctrls[1] = NULL;
2516                                         syncprov_done_ctrl( op, rs, ctrls, 0, 0,
2517                                                 NULL, LDAP_SYNC_REFRESH_DELETES );
2518                                         rs->sr_ctrls = ctrls;
2519                                         rs->sr_err = LDAP_SUCCESS;
2520                                         send_ldap_result( op, rs );
2521                                         rs->sr_ctrls = NULL;
2522                                         return rs->sr_err;
2523                                 }
2524                                 goto shortcut;
2525                         }
2526                 } else {
2527                         /* consumer doesn't have the right number of CSNs */
2528                         changed = SS_CHANGED;
2529                 }
2530                 /* Do we have a sessionlog for this search? */
2531                 sl=si->si_logs;
2532                 if ( sl ) {
2533                         ldap_pvt_thread_mutex_lock( &sl->sl_mutex );
2534                         /* Are there any log entries, and is the consumer state
2535                          * present in the session log?
2536                          */
2537                         if ( sl->sl_num > 0 && ber_bvcmp( &mincsn, &sl->sl_mincsn ) >= 0 ) {
2538                                 do_present = 0;
2539                                 /* mutex is unlocked in playlog */
2540                                 syncprov_playlog( op, rs, sl, srs, ctxcsn, numcsns, sids );
2541                         } else {
2542                                 ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
2543                         }
2544                 }
2545                 /* Is the CSN still present in the database? */
2546                 if ( syncprov_findcsn( op, FIND_CSN ) != LDAP_SUCCESS ) {
2547                         /* No, so a reload is required */
2548                         /* the 2.2 consumer doesn't send this hint */
2549                         if ( si->si_usehint && srs->sr_rhint == 0 ) {
2550                                 if ( ctxcsn )
2551                                         ber_bvarray_free_x( ctxcsn, op->o_tmpmemctx );
2552                                 if ( sids )
2553                                         op->o_tmpfree( sids, op->o_tmpmemctx );
2554                                 rs->sr_err = LDAP_SYNC_REFRESH_REQUIRED;
2555                                 rs->sr_text = "sync cookie is stale";
2556                                 goto bailout;
2557                         }
2558                         if ( srs->sr_state.ctxcsn ) {
2559                                 ber_bvarray_free_x( srs->sr_state.ctxcsn, op->o_tmpmemctx );
2560                                 srs->sr_state.ctxcsn = NULL;
2561                         }
2562                         if ( srs->sr_state.sids ) {
2563                                 slap_sl_free( srs->sr_state.sids, op->o_tmpmemctx );
2564                                 srs->sr_state.sids = NULL;
2565                         }
2566                         srs->sr_state.numcsns = 0;
2567                 } else {
2568                         gotstate = 1;
2569                         /* If changed and doing Present lookup, send Present UUIDs */
2570                         if ( do_present && syncprov_findcsn( op, FIND_PRESENT ) !=
2571                                 LDAP_SUCCESS ) {
2572                                 if ( ctxcsn )
2573                                         ber_bvarray_free_x( ctxcsn, op->o_tmpmemctx );
2574                                 if ( sids )
2575                                         op->o_tmpfree( sids, op->o_tmpmemctx );
2576                                 goto bailout;
2577                         }
2578                 }
2579         } else {
2580                 /* No consumer state, assume something has changed */
2581                 changed = SS_CHANGED;
2582         }
2583
2584 shortcut:
2585         /* Append CSN range to search filter, save original filter
2586          * for persistent search evaluation
2587          */
2588         if ( sop ) {
2589                 sop->s_filterstr= op->ors_filterstr;
2590         }
2591
2592         /* If something changed, find the changes */
2593         if ( gotstate && changed ) {
2594                 Filter *fand, *fava;
2595
2596                 fand = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
2597                 fand->f_choice = LDAP_FILTER_AND;
2598                 fand->f_next = NULL;
2599                 fava = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
2600                 fand->f_and = fava;
2601                 fava->f_choice = LDAP_FILTER_GE;
2602                 fava->f_ava = op->o_tmpalloc( sizeof(AttributeAssertion), op->o_tmpmemctx );
2603                 fava->f_ava->aa_desc = slap_schema.si_ad_entryCSN;
2604 #ifdef LDAP_COMP_MATCH
2605                 fava->f_ava->aa_cf = NULL;
2606 #endif
2607                 ber_dupbv_x( &fava->f_ava->aa_value, &mincsn, op->o_tmpmemctx );
2608                 fava->f_next = op->ors_filter;
2609                 op->ors_filter = fand;
2610                 filter2bv_x( op, op->ors_filter, &op->ors_filterstr );
2611                 if ( sop )
2612                         sop->s_flags |= PS_FIX_FILTER;
2613         }
2614
2615         /* Let our callback add needed info to returned entries */
2616         cb = op->o_tmpcalloc(1, sizeof(slap_callback)+sizeof(searchstate), op->o_tmpmemctx);
2617         ss = (searchstate *)(cb+1);
2618         ss->ss_on = on;
2619         ss->ss_so = sop;
2620         ss->ss_flags = do_present | changed;
2621         ss->ss_ctxcsn = ctxcsn;
2622         ss->ss_numcsns = numcsns;
2623         ss->ss_sids = sids;
2624         cb->sc_response = syncprov_search_response;
2625         cb->sc_cleanup = syncprov_search_cleanup;
2626         cb->sc_private = ss;
2627         cb->sc_next = op->o_callback;
2628         op->o_callback = cb;
2629
2630         /* If this is a persistent search and no changes were reported during
2631          * the refresh phase, just invoke the response callback to transition
2632          * us into persist phase
2633          */
2634         if ( !changed ) {
2635                 rs->sr_err = LDAP_SUCCESS;
2636                 rs->sr_nentries = 0;
2637                 send_ldap_result( op, rs );
2638                 return rs->sr_err;
2639         }
2640         return SLAP_CB_CONTINUE;
2641 }
2642
2643 static int
2644 syncprov_operational(
2645         Operation *op,
2646         SlapReply *rs )
2647 {
2648         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
2649         syncprov_info_t         *si = (syncprov_info_t *)on->on_bi.bi_private;
2650
2651         /* This prevents generating unnecessarily; frontend will strip
2652          * any statically stored copy.
2653          */
2654         if ( op->o_sync != SLAP_CONTROL_NONE )
2655                 return SLAP_CB_CONTINUE;
2656
2657         if ( rs->sr_entry &&
2658                 dn_match( &rs->sr_entry->e_nname, &si->si_contextdn )) {
2659
2660                 if ( SLAP_OPATTRS( rs->sr_attr_flags ) ||
2661                         ad_inlist( slap_schema.si_ad_contextCSN, rs->sr_attrs )) {
2662                         Attribute *a, **ap = NULL;
2663
2664                         for ( a=rs->sr_entry->e_attrs; a; a=a->a_next ) {
2665                                 if ( a->a_desc == slap_schema.si_ad_contextCSN )
2666                                         break;
2667                         }
2668
2669                         ldap_pvt_thread_rdwr_rlock( &si->si_csn_rwlock );
2670                         if ( si->si_ctxcsn ) {
2671                                 if ( !a ) {
2672                                         for ( ap = &rs->sr_operational_attrs; *ap;
2673                                                 ap=&(*ap)->a_next );
2674
2675                                         a = attr_alloc( slap_schema.si_ad_contextCSN );
2676                                         *ap = a;
2677                                 }
2678
2679                                 if ( !ap ) {
2680                                         if ( !(rs->sr_flags & REP_ENTRY_MODIFIABLE) ) {
2681                                                 Entry *e = entry_dup( rs->sr_entry );
2682                                                 if ( rs->sr_flags & REP_ENTRY_MUSTRELEASE ) {
2683                                                         overlay_entry_release_ov( op, rs->sr_entry, 0, on );
2684                                                         rs->sr_flags ^= REP_ENTRY_MUSTRELEASE;
2685                                                 } else if ( rs->sr_flags & REP_ENTRY_MUSTBEFREED ) {
2686                                                         entry_free( rs->sr_entry );
2687                                                 }
2688                                                 rs->sr_entry = e;
2689                                                 rs->sr_flags |=
2690                                                         REP_ENTRY_MODIFIABLE|REP_ENTRY_MUSTBEFREED;
2691                                                 a = attr_find( rs->sr_entry->e_attrs,
2692                                                         slap_schema.si_ad_contextCSN );
2693                                         }
2694                                         if ( a->a_nvals != a->a_vals ) {
2695                                                 ber_bvarray_free( a->a_nvals );
2696                                         }
2697                                         a->a_nvals = NULL;
2698                                         ber_bvarray_free( a->a_vals );
2699                                         a->a_vals = NULL;
2700                                         a->a_numvals = 0;
2701                                 }
2702                                 attr_valadd( a, si->si_ctxcsn, si->si_ctxcsn, si->si_numcsns );
2703                         }
2704                         ldap_pvt_thread_rdwr_runlock( &si->si_csn_rwlock );
2705                 }
2706         }
2707         return SLAP_CB_CONTINUE;
2708 }
2709
2710 enum {
2711         SP_CHKPT = 1,
2712         SP_SESSL,
2713         SP_NOPRES,
2714         SP_USEHINT
2715 };
2716
2717 static ConfigDriver sp_cf_gen;
2718
2719 static ConfigTable spcfg[] = {
2720         { "syncprov-checkpoint", "ops> <minutes", 3, 3, 0, ARG_MAGIC|SP_CHKPT,
2721                 sp_cf_gen, "( OLcfgOvAt:1.1 NAME 'olcSpCheckpoint' "
2722                         "DESC 'ContextCSN checkpoint interval in ops and minutes' "
2723                         "SYNTAX OMsDirectoryString SINGLE-VALUE )", NULL, NULL },
2724         { "syncprov-sessionlog", "ops", 2, 2, 0, ARG_INT|ARG_MAGIC|SP_SESSL,
2725                 sp_cf_gen, "( OLcfgOvAt:1.2 NAME 'olcSpSessionlog' "
2726                         "DESC 'Session log size in ops' "
2727                         "SYNTAX OMsInteger SINGLE-VALUE )", NULL, NULL },
2728         { "syncprov-nopresent", NULL, 2, 2, 0, ARG_ON_OFF|ARG_MAGIC|SP_NOPRES,
2729                 sp_cf_gen, "( OLcfgOvAt:1.3 NAME 'olcSpNoPresent' "
2730                         "DESC 'Omit Present phase processing' "
2731                         "SYNTAX OMsBoolean SINGLE-VALUE )", NULL, NULL },
2732         { "syncprov-reloadhint", NULL, 2, 2, 0, ARG_ON_OFF|ARG_MAGIC|SP_USEHINT,
2733                 sp_cf_gen, "( OLcfgOvAt:1.4 NAME 'olcSpReloadHint' "
2734                         "DESC 'Observe Reload Hint in Request control' "
2735                         "SYNTAX OMsBoolean SINGLE-VALUE )", NULL, NULL },
2736         { NULL, NULL, 0, 0, 0, ARG_IGNORED }
2737 };
2738
2739 static ConfigOCs spocs[] = {
2740         { "( OLcfgOvOc:1.1 "
2741                 "NAME 'olcSyncProvConfig' "
2742                 "DESC 'SyncRepl Provider configuration' "
2743                 "SUP olcOverlayConfig "
2744                 "MAY ( olcSpCheckpoint "
2745                         "$ olcSpSessionlog "
2746                         "$ olcSpNoPresent "
2747                         "$ olcSpReloadHint "
2748                 ") )",
2749                         Cft_Overlay, spcfg },
2750         { NULL, 0, NULL }
2751 };
2752
2753 static int
2754 sp_cf_gen(ConfigArgs *c)
2755 {
2756         slap_overinst           *on = (slap_overinst *)c->bi;
2757         syncprov_info_t         *si = (syncprov_info_t *)on->on_bi.bi_private;
2758         int rc = 0;
2759
2760         if ( c->op == SLAP_CONFIG_EMIT ) {
2761                 switch ( c->type ) {
2762                 case SP_CHKPT:
2763                         if ( si->si_chkops || si->si_chktime ) {
2764                                 struct berval bv;
2765                                 /* we assume si_chktime is a multiple of 60
2766                                  * because the parsed value was originally
2767                                  * multiplied by 60 */
2768                                 bv.bv_len = snprintf( c->cr_msg, sizeof( c->cr_msg ),
2769                                         "%d %d", si->si_chkops, si->si_chktime/60 );
2770                                 if ( bv.bv_len >= sizeof( c->cr_msg ) ) {
2771                                         rc = 1;
2772                                 } else {
2773                                         bv.bv_val = c->cr_msg;
2774                                         value_add_one( &c->rvalue_vals, &bv );
2775                                 }
2776                         } else {
2777                                 rc = 1;
2778                         }
2779                         break;
2780                 case SP_SESSL:
2781                         if ( si->si_logs ) {
2782                                 c->value_int = si->si_logs->sl_size;
2783                         } else {
2784                                 rc = 1;
2785                         }
2786                         break;
2787                 case SP_NOPRES:
2788                         if ( si->si_nopres ) {
2789                                 c->value_int = 1;
2790                         } else {
2791                                 rc = 1;
2792                         }
2793                         break;
2794                 case SP_USEHINT:
2795                         if ( si->si_usehint ) {
2796                                 c->value_int = 1;
2797                         } else {
2798                                 rc = 1;
2799                         }
2800                         break;
2801                 }
2802                 return rc;
2803         } else if ( c->op == LDAP_MOD_DELETE ) {
2804                 switch ( c->type ) {
2805                 case SP_CHKPT:
2806                         si->si_chkops = 0;
2807                         si->si_chktime = 0;
2808                         break;
2809                 case SP_SESSL:
2810                         if ( si->si_logs )
2811                                 si->si_logs->sl_size = 0;
2812                         else
2813                                 rc = LDAP_NO_SUCH_ATTRIBUTE;
2814                         break;
2815                 case SP_NOPRES:
2816                         if ( si->si_nopres )
2817                                 si->si_nopres = 0;
2818                         else
2819                                 rc = LDAP_NO_SUCH_ATTRIBUTE;
2820                         break;
2821                 case SP_USEHINT:
2822                         if ( si->si_usehint )
2823                                 si->si_usehint = 0;
2824                         else
2825                                 rc = LDAP_NO_SUCH_ATTRIBUTE;
2826                         break;
2827                 }
2828                 return rc;
2829         }
2830         switch ( c->type ) {
2831         case SP_CHKPT:
2832                 if ( lutil_atoi( &si->si_chkops, c->argv[1] ) != 0 ) {
2833                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s unable to parse checkpoint ops # \"%s\"",
2834                                 c->argv[0], c->argv[1] );
2835                         Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
2836                                 "%s: %s\n", c->log, c->cr_msg, 0 );
2837                         return ARG_BAD_CONF;
2838                 }
2839                 if ( si->si_chkops <= 0 ) {
2840                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s invalid checkpoint ops # \"%d\"",
2841                                 c->argv[0], si->si_chkops );
2842                         Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
2843                                 "%s: %s\n", c->log, c->cr_msg, 0 );
2844                         return ARG_BAD_CONF;
2845                 }
2846                 if ( lutil_atoi( &si->si_chktime, c->argv[2] ) != 0 ) {
2847                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s unable to parse checkpoint time \"%s\"",
2848                                 c->argv[0], c->argv[1] );
2849                         Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
2850                                 "%s: %s\n", c->log, c->cr_msg, 0 );
2851                         return ARG_BAD_CONF;
2852                 }
2853                 if ( si->si_chktime <= 0 ) {
2854                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s invalid checkpoint time \"%d\"",
2855                                 c->argv[0], si->si_chkops );
2856                         Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
2857                                 "%s: %s\n", c->log, c->cr_msg, 0 );
2858                         return ARG_BAD_CONF;
2859                 }
2860                 si->si_chktime *= 60;
2861                 break;
2862         case SP_SESSL: {
2863                 sessionlog *sl;
2864                 int size = c->value_int;
2865
2866                 if ( size < 0 ) {
2867                         snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s size %d is negative",
2868                                 c->argv[0], size );
2869                         Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
2870                                 "%s: %s\n", c->log, c->cr_msg, 0 );
2871                         return ARG_BAD_CONF;
2872                 }
2873                 sl = si->si_logs;
2874                 if ( !sl ) {
2875                         sl = ch_malloc( sizeof( sessionlog ) + LDAP_PVT_CSNSTR_BUFSIZE );
2876                         sl->sl_mincsn.bv_val = (char *)(sl+1);
2877                         sl->sl_mincsn.bv_len = 0;
2878                         sl->sl_num = 0;
2879                         sl->sl_head = sl->sl_tail = NULL;
2880                         ldap_pvt_thread_mutex_init( &sl->sl_mutex );
2881                         si->si_logs = sl;
2882                 }
2883                 sl->sl_size = size;
2884                 }
2885                 break;
2886         case SP_NOPRES:
2887                 si->si_nopres = c->value_int;
2888                 break;
2889         case SP_USEHINT:
2890                 si->si_usehint = c->value_int;
2891                 break;
2892         }
2893         return rc;
2894 }
2895
2896 /* ITS#3456 we cannot run this search on the main thread, must use a
2897  * child thread in order to insure we have a big enough stack.
2898  */
2899 static void *
2900 syncprov_db_otask(
2901         void *ptr
2902 )
2903 {
2904         syncprov_findcsn( ptr, FIND_MAXCSN );
2905         return NULL;
2906 }
2907
2908 /* Read any existing contextCSN from the underlying db.
2909  * Then search for any entries newer than that. If no value exists,
2910  * just generate it. Cache whatever result.
2911  */
2912 static int
2913 syncprov_db_open(
2914         BackendDB *be,
2915         ConfigReply *cr
2916 )
2917 {
2918         slap_overinst   *on = (slap_overinst *) be->bd_info;
2919         syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
2920
2921         Connection conn = { 0 };
2922         OperationBuffer opbuf;
2923         Operation *op;
2924         Entry *e = NULL;
2925         Attribute *a;
2926         int rc;
2927         void *thrctx = NULL;
2928
2929         if ( !SLAP_LASTMOD( be )) {
2930                 Debug( LDAP_DEBUG_ANY,
2931                         "syncprov_db_open: invalid config, lastmod must be enabled\n", 0, 0, 0 );
2932                 return -1;
2933         }
2934
2935         if ( slapMode & SLAP_TOOL_MODE ) {
2936                 return 0;
2937         }
2938
2939         rc = overlay_register_control( be, LDAP_CONTROL_SYNC );
2940         if ( rc ) {
2941                 return rc;
2942         }
2943
2944         thrctx = ldap_pvt_thread_pool_context();
2945         connection_fake_init2( &conn, &opbuf, thrctx, 0 );
2946         op = &opbuf.ob_op;
2947         op->o_bd = be;
2948         op->o_dn = be->be_rootdn;
2949         op->o_ndn = be->be_rootndn;
2950
2951         if ( SLAP_SYNC_SUBENTRY( be )) {
2952                 build_new_dn( &si->si_contextdn, be->be_nsuffix,
2953                         (struct berval *)&slap_ldapsync_cn_bv, NULL );
2954         } else {
2955                 si->si_contextdn = be->be_nsuffix[0];
2956         }
2957         rc = overlay_entry_get_ov( op, &si->si_contextdn, NULL,
2958                 slap_schema.si_ad_contextCSN, 0, &e, on );
2959
2960         if ( e ) {
2961                 ldap_pvt_thread_t tid;
2962
2963                 a = attr_find( e->e_attrs, slap_schema.si_ad_contextCSN );
2964                 if ( a ) {
2965                         ber_bvarray_dup_x( &si->si_ctxcsn, a->a_vals, NULL );
2966                         si->si_numcsns = a->a_numvals;
2967                         si->si_sids = slap_parse_csn_sids( si->si_ctxcsn, a->a_numvals, NULL );
2968                 }
2969                 overlay_entry_release_ov( op, e, 0, on );
2970                 if ( si->si_ctxcsn && !SLAP_DBCLEAN( be )) {
2971                         op->o_req_dn = be->be_suffix[0];
2972                         op->o_req_ndn = be->be_nsuffix[0];
2973                         op->ors_scope = LDAP_SCOPE_SUBTREE;
2974                         ldap_pvt_thread_create( &tid, 0, syncprov_db_otask, op );
2975                         ldap_pvt_thread_join( tid, NULL );
2976                 }
2977         }
2978
2979         /* Didn't find a contextCSN, should we generate one? */
2980         if ( !si->si_ctxcsn ) {
2981                 char csnbuf[ LDAP_PVT_CSNSTR_BUFSIZE ];
2982                 struct berval csn;
2983
2984                 if ( SLAP_SYNC_SHADOW( op->o_bd )) {
2985                 /* If we're also a consumer, then don't generate anything.
2986                  * Wait for our provider to send it to us, or for a local
2987                  * modify if we have multimaster.
2988                  */
2989                         goto out;
2990                 }
2991                 csn.bv_val = csnbuf;
2992                 csn.bv_len = sizeof( csnbuf );
2993                 slap_get_csn( op, &csn, 0 );
2994                 value_add_one( &si->si_ctxcsn, &csn );
2995                 si->si_numcsns = 1;
2996                 si->si_sids = ch_malloc( sizeof(int) );
2997                 si->si_sids[0] = slap_serverID;
2998
2999                 /* make sure we do a checkpoint on close */
3000                 si->si_numops++;
3001         }
3002
3003 out:
3004         op->o_bd->bd_info = (BackendInfo *)on;
3005         return 0;
3006 }
3007
3008 /* Write the current contextCSN into the underlying db.
3009  */
3010 static int
3011 syncprov_db_close(
3012         BackendDB *be,
3013         ConfigReply *cr
3014 )
3015 {
3016     slap_overinst   *on = (slap_overinst *) be->bd_info;
3017     syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
3018
3019         if ( slapMode & SLAP_TOOL_MODE ) {
3020                 return 0;
3021         }
3022         if ( si->si_numops ) {
3023                 Connection conn = {0};
3024                 OperationBuffer opbuf;
3025                 Operation *op;
3026                 SlapReply rs = {REP_RESULT};
3027                 void *thrctx;
3028
3029                 thrctx = ldap_pvt_thread_pool_context();
3030                 connection_fake_init2( &conn, &opbuf, thrctx, 0 );
3031                 op = &opbuf.ob_op;
3032                 op->o_bd = be;
3033                 op->o_dn = be->be_rootdn;
3034                 op->o_ndn = be->be_rootndn;
3035                 syncprov_checkpoint( op, &rs, on );
3036         }
3037
3038     return 0;
3039 }
3040
3041 static int
3042 syncprov_db_init(
3043         BackendDB *be,
3044         ConfigReply *cr
3045 )
3046 {
3047         slap_overinst   *on = (slap_overinst *)be->bd_info;
3048         syncprov_info_t *si;
3049
3050         if ( SLAP_ISGLOBALOVERLAY( be ) ) {
3051                 Debug( LDAP_DEBUG_ANY,
3052                         "syncprov must be instantiated within a database.\n",
3053                         0, 0, 0 );
3054                 return 1;
3055         }
3056
3057         si = ch_calloc(1, sizeof(syncprov_info_t));
3058         on->on_bi.bi_private = si;
3059         ldap_pvt_thread_rdwr_init( &si->si_csn_rwlock );
3060         ldap_pvt_thread_mutex_init( &si->si_ops_mutex );
3061         ldap_pvt_thread_mutex_init( &si->si_mods_mutex );
3062         ldap_pvt_thread_mutex_init( &si->si_resp_mutex );
3063
3064         csn_anlist[0].an_desc = slap_schema.si_ad_entryCSN;
3065         csn_anlist[0].an_name = slap_schema.si_ad_entryCSN->ad_cname;
3066         csn_anlist[1].an_desc = slap_schema.si_ad_entryUUID;
3067         csn_anlist[1].an_name = slap_schema.si_ad_entryUUID->ad_cname;
3068
3069         uuid_anlist[0].an_desc = slap_schema.si_ad_entryUUID;
3070         uuid_anlist[0].an_name = slap_schema.si_ad_entryUUID->ad_cname;
3071
3072         return 0;
3073 }
3074
3075 static int
3076 syncprov_db_destroy(
3077         BackendDB *be,
3078         ConfigReply *cr
3079 )
3080 {
3081         slap_overinst   *on = (slap_overinst *)be->bd_info;
3082         syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
3083
3084         if ( si ) {
3085                 if ( si->si_logs ) {
3086                         slog_entry *se = si->si_logs->sl_head;
3087
3088                         while ( se ) {
3089                                 slog_entry *se_next = se->se_next;
3090                                 ch_free( se );
3091                                 se = se_next;
3092                         }
3093
3094                         ch_free( si->si_logs );
3095                 }
3096                 if ( si->si_ctxcsn )
3097                         ber_bvarray_free( si->si_ctxcsn );
3098                 if ( si->si_sids )
3099                         ch_free( si->si_sids );
3100                 ldap_pvt_thread_mutex_destroy( &si->si_resp_mutex );
3101                 ldap_pvt_thread_mutex_destroy( &si->si_mods_mutex );
3102                 ldap_pvt_thread_mutex_destroy( &si->si_ops_mutex );
3103                 ldap_pvt_thread_rdwr_destroy( &si->si_csn_rwlock );
3104                 ch_free( si );
3105         }
3106
3107         return 0;
3108 }
3109
3110 static int syncprov_parseCtrl (
3111         Operation *op,
3112         SlapReply *rs,
3113         LDAPControl *ctrl )
3114 {
3115         ber_tag_t tag;
3116         BerElementBuffer berbuf;
3117         BerElement *ber = (BerElement *)&berbuf;
3118         ber_int_t mode;
3119         ber_len_t len;
3120         struct berval cookie = BER_BVNULL;
3121         sync_control *sr;
3122         int rhint = 0;
3123
3124         if ( op->o_sync != SLAP_CONTROL_NONE ) {
3125                 rs->sr_text = "Sync control specified multiple times";
3126                 return LDAP_PROTOCOL_ERROR;
3127         }
3128
3129         if ( op->o_pagedresults != SLAP_CONTROL_NONE ) {
3130                 rs->sr_text = "Sync control specified with pagedResults control";
3131                 return LDAP_PROTOCOL_ERROR;
3132         }
3133
3134         if ( BER_BVISNULL( &ctrl->ldctl_value ) ) {
3135                 rs->sr_text = "Sync control value is absent";
3136                 return LDAP_PROTOCOL_ERROR;
3137         }
3138
3139         if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
3140                 rs->sr_text = "Sync control value is empty";
3141                 return LDAP_PROTOCOL_ERROR;
3142         }
3143
3144         /* Parse the control value
3145          *      syncRequestValue ::= SEQUENCE {
3146          *              mode   ENUMERATED {
3147          *                      -- 0 unused
3148          *                      refreshOnly             (1),
3149          *                      -- 2 reserved
3150          *                      refreshAndPersist       (3)
3151          *              },
3152          *              cookie  syncCookie OPTIONAL
3153          *      }
3154          */
3155
3156         ber_init2( ber, &ctrl->ldctl_value, 0 );
3157
3158         if ( (tag = ber_scanf( ber, "{i" /*}*/, &mode )) == LBER_ERROR ) {
3159                 rs->sr_text = "Sync control : mode decoding error";
3160                 return LDAP_PROTOCOL_ERROR;
3161         }
3162
3163         switch( mode ) {
3164         case LDAP_SYNC_REFRESH_ONLY:
3165                 mode = SLAP_SYNC_REFRESH;
3166                 break;
3167         case LDAP_SYNC_REFRESH_AND_PERSIST:
3168                 mode = SLAP_SYNC_REFRESH_AND_PERSIST;
3169                 break;
3170         default:
3171                 rs->sr_text = "Sync control : unknown update mode";
3172                 return LDAP_PROTOCOL_ERROR;
3173         }
3174
3175         tag = ber_peek_tag( ber, &len );
3176
3177         if ( tag == LDAP_TAG_SYNC_COOKIE ) {
3178                 if (( ber_scanf( ber, /*{*/ "m", &cookie )) == LBER_ERROR ) {
3179                         rs->sr_text = "Sync control : cookie decoding error";
3180                         return LDAP_PROTOCOL_ERROR;
3181                 }
3182                 tag = ber_peek_tag( ber, &len );
3183         }
3184         if ( tag == LDAP_TAG_RELOAD_HINT ) {
3185                 if (( ber_scanf( ber, /*{*/ "b", &rhint )) == LBER_ERROR ) {
3186                         rs->sr_text = "Sync control : rhint decoding error";
3187                         return LDAP_PROTOCOL_ERROR;
3188                 }
3189         }
3190         if (( ber_scanf( ber, /*{*/ "}")) == LBER_ERROR ) {
3191                         rs->sr_text = "Sync control : decoding error";
3192                         return LDAP_PROTOCOL_ERROR;
3193         }
3194         sr = op->o_tmpcalloc( 1, sizeof(struct sync_control), op->o_tmpmemctx );
3195         sr->sr_rhint = rhint;
3196         if (!BER_BVISNULL(&cookie)) {
3197                 ber_dupbv_x( &sr->sr_state.octet_str, &cookie, op->o_tmpmemctx );
3198                 /* If parse fails, pretend no cookie was sent */
3199                 if ( slap_parse_sync_cookie( &sr->sr_state, op->o_tmpmemctx ) ||
3200                         sr->sr_state.rid == -1 ) {
3201                         if ( sr->sr_state.ctxcsn ) {
3202                                 ber_bvarray_free_x( sr->sr_state.ctxcsn, op->o_tmpmemctx );
3203                                 sr->sr_state.ctxcsn = NULL;
3204                         }
3205                         sr->sr_state.numcsns = 0;
3206                 }
3207         }
3208
3209         op->o_controls[slap_cids.sc_LDAPsync] = sr;
3210
3211         op->o_sync = ctrl->ldctl_iscritical
3212                 ? SLAP_CONTROL_CRITICAL
3213                 : SLAP_CONTROL_NONCRITICAL;
3214
3215         op->o_sync_mode |= mode;        /* o_sync_mode shares o_sync */
3216
3217         return LDAP_SUCCESS;
3218 }
3219
3220 /* This overlay is set up for dynamic loading via moduleload. For static
3221  * configuration, you'll need to arrange for the slap_overinst to be
3222  * initialized and registered by some other function inside slapd.
3223  */
3224
3225 static slap_overinst            syncprov;
3226
3227 int
3228 syncprov_initialize()
3229 {
3230         int rc;
3231
3232         rc = register_supported_control( LDAP_CONTROL_SYNC,
3233                 SLAP_CTRL_SEARCH, NULL,
3234                 syncprov_parseCtrl, &slap_cids.sc_LDAPsync );
3235         if ( rc != LDAP_SUCCESS ) {
3236                 Debug( LDAP_DEBUG_ANY,
3237                         "syncprov_init: Failed to register control %d\n", rc, 0, 0 );
3238                 return rc;
3239         }
3240
3241         syncprov.on_bi.bi_type = "syncprov";
3242         syncprov.on_bi.bi_db_init = syncprov_db_init;
3243         syncprov.on_bi.bi_db_destroy = syncprov_db_destroy;
3244         syncprov.on_bi.bi_db_open = syncprov_db_open;
3245         syncprov.on_bi.bi_db_close = syncprov_db_close;
3246
3247         syncprov.on_bi.bi_op_abandon = syncprov_op_abandon;
3248         syncprov.on_bi.bi_op_cancel = syncprov_op_abandon;
3249
3250         syncprov.on_bi.bi_op_add = syncprov_op_mod;
3251         syncprov.on_bi.bi_op_compare = syncprov_op_compare;
3252         syncprov.on_bi.bi_op_delete = syncprov_op_mod;
3253         syncprov.on_bi.bi_op_modify = syncprov_op_mod;
3254         syncprov.on_bi.bi_op_modrdn = syncprov_op_mod;
3255         syncprov.on_bi.bi_op_search = syncprov_op_search;
3256         syncprov.on_bi.bi_extended = syncprov_op_extended;
3257         syncprov.on_bi.bi_operational = syncprov_operational;
3258
3259         syncprov.on_bi.bi_cf_ocs = spocs;
3260
3261         generic_filter.f_desc = slap_schema.si_ad_objectClass;
3262
3263         rc = config_register_schema( spcfg, spocs );
3264         if ( rc ) return rc;
3265
3266         return overlay_register( &syncprov );
3267 }
3268
3269 #if SLAPD_OVER_SYNCPROV == SLAPD_MOD_DYNAMIC
3270 int
3271 init_module( int argc, char *argv[] )
3272 {
3273         return syncprov_initialize();
3274 }
3275 #endif /* SLAPD_OVER_SYNCPROV == SLAPD_MOD_DYNAMIC */
3276
3277 #endif /* defined(SLAPD_OVER_SYNCPROV) */