git.sur5r.net Git - openldap/blob - servers/slapd/back-mdb/tools.c

   1 /* tools.c - tools for slap tools */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 2011-2013 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
  17 #include "portable.h"
  18
  19 #include <stdio.h>
  20 #include <ac/string.h>
  21 #include <ac/errno.h>
  22
  23 #define AVL_INTERNAL
  24 #include "back-mdb.h"
  25 #include "idl.h"
  26
  27 #ifdef MDB_TOOL_IDL_CACHING
  28 static int mdb_tool_idl_flush( BackendDB *be, MDB_txn *txn );
  29
  30 #define IDBLOCK 1024
  31
  32 typedef struct mdb_tool_idl_cache_entry {
  33         struct mdb_tool_idl_cache_entry *next;
  34         ID ids[IDBLOCK];
  35 } mdb_tool_idl_cache_entry;
  36
  37 typedef struct mdb_tool_idl_cache {
  38         struct berval kstr;
  39         mdb_tool_idl_cache_entry *head, *tail;
  40         ID first, last;
  41         int count;
  42         short offset;
  43         short flags;
  44 } mdb_tool_idl_cache;
  45 #define WAS_FOUND       0x01
  46 #define WAS_RANGE       0x02
  47
  48 #define MDB_TOOL_IDL_FLUSH(be, txn)     mdb_tool_idl_flush(be, txn)
  49 #else
  50 #define MDB_TOOL_IDL_FLUSH(be, txn)
  51 #endif /* MDB_TOOL_IDL_CACHING */
  52
  53 static MDB_txn *txn = NULL, *txi = NULL;
  54 static MDB_cursor *cursor = NULL, *idcursor = NULL;
  55 static MDB_cursor *mcp = NULL, *mcd = NULL;
  56 static MDB_val key, data;
  57 static ID previd = NOID;
  58
  59 typedef struct dn_id {
  60         ID id;
  61         struct berval dn;
  62 } dn_id;
  63
  64 #define HOLE_SIZE       4096
  65 static dn_id hbuf[HOLE_SIZE], *holes = hbuf;
  66 static unsigned nhmax = HOLE_SIZE;
  67 static unsigned nholes;
  68
  69 static struct berval    *tool_base;
  70 static int              tool_scope;
  71 static Filter           *tool_filter;
  72 static Entry            *tool_next_entry;
  73
  74 static ID mdb_tool_ix_id;
  75 static Operation *mdb_tool_ix_op;
  76 static MDB_txn *mdb_tool_ix_txn;
  77 static int mdb_tool_index_tcount, mdb_tool_threads;
  78 static IndexRec *mdb_tool_index_rec;
  79 static struct mdb_info *mdb_tool_info;
  80 static ldap_pvt_thread_mutex_t mdb_tool_index_mutex;
  81 static ldap_pvt_thread_cond_t mdb_tool_index_cond_main;
  82 static ldap_pvt_thread_cond_t mdb_tool_index_cond_work;
  83 static void * mdb_tool_index_task( void *ctx, void *ptr );
  84
  85 static int      mdb_writes, mdb_writes_per_commit;
  86
  87 static int
  88 mdb_tool_entry_get_int( BackendDB *be, ID id, Entry **ep );
  89
  90 int mdb_tool_entry_open(
  91         BackendDB *be, int mode )
  92 {
  93         /* In Quick mode, commit once per 1000 entries */
  94         mdb_writes = 0;
  95         if ( slapMode & SLAP_TOOL_QUICK )
  96                 mdb_writes_per_commit = 1000;
  97         else
  98                 mdb_writes_per_commit = 1;
  99
 100         /* Set up for threaded slapindex */
 101         if (( slapMode & (SLAP_TOOL_QUICK|SLAP_TOOL_READONLY)) == SLAP_TOOL_QUICK ) {
 102                 if ( !mdb_tool_info ) {
 103                         struct mdb_info *mdb = (struct mdb_info *) be->be_private;
 104                         ldap_pvt_thread_mutex_init( &mdb_tool_index_mutex );
 105                         ldap_pvt_thread_cond_init( &mdb_tool_index_cond_main );
 106                         ldap_pvt_thread_cond_init( &mdb_tool_index_cond_work );
 107                         if ( mdb->mi_nattrs ) {
 108                                 int i;
 109 #if 0                   /* threaded indexing has no performance advantage */
 110                                 mdb_tool_threads = slap_tool_thread_max - 1;
 111 #endif
 112                                 if ( mdb_tool_threads > 1 ) {
 113                                         mdb_tool_index_rec = ch_calloc( mdb->mi_nattrs, sizeof( IndexRec ));
 114                                         mdb_tool_index_tcount = mdb_tool_threads - 1;
 115                                         for (i=1; i<mdb_tool_threads; i++) {
 116                                                 int *ptr = ch_malloc( sizeof( int ));
 117                                                 *ptr = i;
 118                                                 ldap_pvt_thread_pool_submit( &connection_pool,
 119                                                         mdb_tool_index_task, ptr );
 120                                         }
 121                                         mdb_tool_info = mdb;
 122                                 }
 123                         }
 124                 }
 125         }
 126
 127         return 0;
 128 }
 129
 130 int mdb_tool_entry_close(
 131         BackendDB *be )
 132 {
 133         if ( mdb_tool_info ) {
 134                 slapd_shutdown = 1;
 135                 ldap_pvt_thread_mutex_lock( &mdb_tool_index_mutex );
 136
 137                 /* There might still be some threads starting */
 138                 while ( mdb_tool_index_tcount > 0 ) {
 139                         ldap_pvt_thread_cond_wait( &mdb_tool_index_cond_main,
 140                                         &mdb_tool_index_mutex );
 141                 }
 142
 143                 mdb_tool_index_tcount = mdb_tool_threads - 1;
 144                 ldap_pvt_thread_cond_broadcast( &mdb_tool_index_cond_work );
 145
 146                 /* Make sure all threads are stopped */
 147                 while ( mdb_tool_index_tcount > 0 ) {
 148                         ldap_pvt_thread_cond_wait( &mdb_tool_index_cond_main,
 149                                 &mdb_tool_index_mutex );
 150                 }
 151                 ldap_pvt_thread_mutex_unlock( &mdb_tool_index_mutex );
 152
 153                 mdb_tool_info = NULL;
 154                 slapd_shutdown = 0;
 155                 ch_free( mdb_tool_index_rec );
 156                 mdb_tool_index_tcount = mdb_tool_threads - 1;
 157         }
 158
 159         if( idcursor ) {
 160                 mdb_cursor_close( idcursor );
 161                 idcursor = NULL;
 162         }
 163         if( cursor ) {
 164                 mdb_cursor_close( cursor );
 165                 cursor = NULL;
 166         }
 167         if( txn ) {
 168                 int rc;
 169                 MDB_TOOL_IDL_FLUSH( be, txn );
 170                 if (( rc = mdb_txn_commit( txn ))) {
 171                         Debug( LDAP_DEBUG_ANY,
 172                                 LDAP_XSTRING(mdb_tool_entry_close) ": database %s: "
 173                                 "txn_commit failed: %s (%d)\n",
 174                                 be->be_suffix[0].bv_val, mdb_strerror(rc), rc );
 175                         return -1;
 176                 }
 177                 txn = NULL;
 178         }
 179
 180         if( nholes ) {
 181                 unsigned i;
 182                 fprintf( stderr, "Error, entries missing!\n");
 183                 for (i=0; i<nholes; i++) {
 184                         fprintf(stderr, "  entry %ld: %s\n",
 185                                 holes[i].id, holes[i].dn.bv_val);
 186                 }
 187                 nholes = 0;
 188                 return -1;
 189         }
 190
 191         return 0;
 192 }
 193
 194 ID
 195 mdb_tool_entry_first_x(
 196         BackendDB *be,
 197         struct berval *base,
 198         int scope,
 199         Filter *f )
 200 {
 201         tool_base = base;
 202         tool_scope = scope;
 203         tool_filter = f;
 204
 205         return mdb_tool_entry_next( be );
 206 }
 207
 208 ID mdb_tool_entry_next(
 209         BackendDB *be )
 210 {
 211         int rc;
 212         ID id;
 213         struct mdb_info *mdb;
 214
 215         assert( be != NULL );
 216         assert( slapMode & SLAP_TOOL_MODE );
 217
 218         mdb = (struct mdb_info *) be->be_private;
 219         assert( mdb != NULL );
 220
 221         if ( !txn ) {
 222                 rc = mdb_txn_begin( mdb->mi_dbenv, NULL, MDB_RDONLY, &txn );
 223                 if ( rc )
 224                         return NOID;
 225                 rc = mdb_cursor_open( txn, mdb->mi_id2entry, &cursor );
 226                 if ( rc ) {
 227                         mdb_txn_abort( txn );
 228                         return NOID;
 229                 }
 230         }
 231
 232 next:;
 233         rc = mdb_cursor_get( cursor, &key, &data, MDB_NEXT );
 234
 235         if( rc ) {
 236                 return NOID;
 237         }
 238
 239         previd = *(ID *)key.mv_data;
 240         id = previd;
 241
 242         if ( !data.mv_size )
 243                 goto next;
 244
 245         if ( tool_filter || tool_base ) {
 246                 static Operation op = {0};
 247                 static Opheader ohdr = {0};
 248
 249                 op.o_hdr = &ohdr;
 250                 op.o_bd = be;
 251                 op.o_tmpmemctx = NULL;
 252                 op.o_tmpmfuncs = &ch_mfuncs;
 253
 254                 if ( tool_next_entry ) {
 255                         mdb_entry_release( &op, tool_next_entry, 0 );
 256                         tool_next_entry = NULL;
 257                 }
 258
 259                 rc = mdb_tool_entry_get_int( be, id, &tool_next_entry );
 260                 if ( rc == LDAP_NO_SUCH_OBJECT ) {
 261                         goto next;
 262                 }
 263
 264                 assert( tool_next_entry != NULL );
 265
 266                 if ( tool_filter && test_filter( NULL, tool_next_entry, tool_filter ) != LDAP_COMPARE_TRUE )
 267                 {
 268                         mdb_entry_release( &op, tool_next_entry, 0 );
 269                         tool_next_entry = NULL;
 270                         goto next;
 271                 }
 272         }
 273
 274         return id;
 275 }
 276
 277 ID mdb_tool_dn2id_get(
 278         Backend *be,
 279         struct berval *dn
 280 )
 281 {
 282         struct mdb_info *mdb;
 283         Operation op = {0};
 284         Opheader ohdr = {0};
 285         ID id;
 286         int rc;
 287
 288         if ( BER_BVISEMPTY(dn) )
 289                 return 0;
 290
 291         mdb = (struct mdb_info *) be->be_private;
 292
 293         if ( !txn ) {
 294                 rc = mdb_txn_begin( mdb->mi_dbenv, NULL, (slapMode & SLAP_TOOL_READONLY) != 0 ?
 295                         MDB_RDONLY : 0, &txn );
 296                 if ( rc )
 297                         return NOID;
 298         }
 299
 300         op.o_hdr = &ohdr;
 301         op.o_bd = be;
 302         op.o_tmpmemctx = NULL;
 303         op.o_tmpmfuncs = &ch_mfuncs;
 304
 305         rc = mdb_dn2id( &op, txn, NULL, dn, &id, NULL, NULL, NULL );
 306         if ( rc == MDB_NOTFOUND )
 307                 return NOID;
 308
 309         return id;
 310 }
 311
 312 static int
 313 mdb_tool_entry_get_int( BackendDB *be, ID id, Entry **ep )
 314 {
 315         Operation op = {0};
 316         Opheader ohdr = {0};
 317
 318         Entry *e = NULL;
 319         struct berval dn = BER_BVNULL, ndn = BER_BVNULL;
 320         int rc;
 321
 322         assert( be != NULL );
 323         assert( slapMode & SLAP_TOOL_MODE );
 324
 325         if ( ( tool_filter || tool_base ) && id == previd && tool_next_entry != NULL ) {
 326                 *ep = tool_next_entry;
 327                 tool_next_entry = NULL;
 328                 return LDAP_SUCCESS;
 329         }
 330
 331         if ( id != previd ) {
 332                 key.mv_size = sizeof(ID);
 333                 key.mv_data = &id;
 334                 rc = mdb_cursor_get( cursor, &key, &data, MDB_SET );
 335                 if ( rc ) {
 336                         rc = LDAP_OTHER;
 337                         goto done;
 338                 }
 339         }
 340         if ( !data.mv_size ) {
 341                 rc = LDAP_NO_SUCH_OBJECT;
 342                 goto done;
 343         }
 344
 345         op.o_hdr = &ohdr;
 346         op.o_bd = be;
 347         op.o_tmpmemctx = NULL;
 348         op.o_tmpmfuncs = &ch_mfuncs;
 349         if ( slapMode & SLAP_TOOL_READONLY ) {
 350                 rc = mdb_id2name( &op, txn, &idcursor, id, &dn, &ndn );
 351                 if ( rc  ) {
 352                         rc = LDAP_OTHER;
 353                         if ( e ) {
 354                                 mdb_entry_return( &op, e );
 355                                 e = NULL;
 356                         }
 357                         goto done;
 358                 }
 359                 if ( tool_base != NULL ) {
 360                         if ( !dnIsSuffixScope( &ndn, tool_base, tool_scope ) ) {
 361                                 ch_free( dn.bv_val );
 362                                 ch_free( ndn.bv_val );
 363                                 rc = LDAP_NO_SUCH_OBJECT;
 364                                 goto done;
 365                         }
 366                 }
 367         }
 368         rc = mdb_entry_decode( &op, &data, &e );
 369         e->e_id = id;
 370         if ( !BER_BVISNULL( &dn )) {
 371                 e->e_name = dn;
 372                 e->e_nname = ndn;
 373         } else {
 374                 e->e_name.bv_val = NULL;
 375                 e->e_nname.bv_val = NULL;
 376         }
 377
 378 done:
 379         if ( e != NULL ) {
 380                 *ep = e;
 381         }
 382
 383         return rc;
 384 }
 385
 386 Entry*
 387 mdb_tool_entry_get( BackendDB *be, ID id )
 388 {
 389         Entry *e = NULL;
 390         int rc;
 391
 392         if ( !txn ) {
 393                 struct mdb_info *mdb = (struct mdb_info *) be->be_private;
 394                 rc = mdb_txn_begin( mdb->mi_dbenv, NULL,
 395                         (slapMode & SLAP_TOOL_READONLY) ? MDB_RDONLY : 0, &txn );
 396                 if ( rc )
 397                         return NULL;
 398         }
 399         if ( !cursor ) {
 400                 struct mdb_info *mdb = (struct mdb_info *) be->be_private;
 401                 rc = mdb_cursor_open( txn, mdb->mi_id2entry, &cursor );
 402                 if ( rc ) {
 403                         mdb_txn_abort( txn );
 404                         txn = NULL;
 405                         return NULL;
 406                 }
 407         }
 408         (void)mdb_tool_entry_get_int( be, id, &e );
 409         return e;
 410 }
 411
 412 static int mdb_tool_next_id(
 413         Operation *op,
 414         MDB_txn *tid,
 415         Entry *e,
 416         struct berval *text,
 417         int hole )
 418 {
 419         struct mdb_info *mdb = (struct mdb_info *) op->o_bd->be_private;
 420         struct berval dn = e->e_name;
 421         struct berval ndn = e->e_nname;
 422         struct berval pdn, npdn, nmatched;
 423         ID id, pid = 0;
 424         int rc;
 425
 426         if (ndn.bv_len == 0) {
 427                 e->e_id = 0;
 428                 return 0;
 429         }
 430
 431         rc = mdb_dn2id( op, tid, mcp, &ndn, &id, NULL, NULL, &nmatched );
 432         if ( rc == MDB_NOTFOUND ) {
 433                 if ( !be_issuffix( op->o_bd, &ndn ) ) {
 434                         ID eid = e->e_id;
 435                         dnParent( &ndn, &npdn );
 436                         if ( nmatched.bv_len != npdn.bv_len ) {
 437                                 dnParent( &dn, &pdn );
 438                                 e->e_name = pdn;
 439                                 e->e_nname = npdn;
 440                                 rc = mdb_tool_next_id( op, tid, e, text, 1 );
 441                                 e->e_name = dn;
 442                                 e->e_nname = ndn;
 443                                 if ( rc ) {
 444                                         return rc;
 445                                 }
 446                                 /* If parent didn't exist, it was created just now
 447                                  * and its ID is now in e->e_id. Make sure the current
 448                                  * entry gets added under the new parent ID.
 449                                  */
 450                                 if ( eid != e->e_id ) {
 451                                         pid = e->e_id;
 452                                 }
 453                         } else {
 454                                 pid = id;
 455                         }
 456                 }
 457                 rc = mdb_next_id( op->o_bd, idcursor, &e->e_id );
 458                 if ( rc ) {
 459                         snprintf( text->bv_val, text->bv_len,
 460                                 "next_id failed: %s (%d)",
 461                                 mdb_strerror(rc), rc );
 462                 Debug( LDAP_DEBUG_ANY,
 463                         "=> mdb_tool_next_id: %s\n", text->bv_val, 0, 0 );
 464                         return rc;
 465                 }
 466                 rc = mdb_dn2id_add( op, mcp, mcd, pid, 1, e );
 467                 if ( rc ) {
 468                         snprintf( text->bv_val, text->bv_len,
 469                                 "dn2id_add failed: %s (%d)",
 470                                 mdb_strerror(rc), rc );
 471                         Debug( LDAP_DEBUG_ANY,
 472                                 "=> mdb_tool_next_id: %s\n", text->bv_val, 0, 0 );
 473                 } else if ( hole ) {
 474                         MDB_val key, data;
 475                         if ( nholes == nhmax - 1 ) {
 476                                 if ( holes == hbuf ) {
 477                                         holes = ch_malloc( nhmax * sizeof(dn_id) * 2 );
 478                                         AC_MEMCPY( holes, hbuf, sizeof(hbuf) );
 479                                 } else {
 480                                         holes = ch_realloc( holes, nhmax * sizeof(dn_id) * 2 );
 481                                 }
 482                                 nhmax *= 2;
 483                         }
 484                         ber_dupbv( &holes[nholes].dn, &ndn );
 485                         holes[nholes++].id = e->e_id;
 486                         key.mv_size = sizeof(ID);
 487                         key.mv_data = &e->e_id;
 488                         data.mv_size = 0;
 489                         data.mv_data = NULL;
 490                         rc = mdb_cursor_put( idcursor, &key, &data, MDB_NOOVERWRITE );
 491                         if ( rc == MDB_KEYEXIST )
 492                                 rc = 0;
 493                         if ( rc ) {
 494                                 snprintf( text->bv_val, text->bv_len,
 495                                         "dummy id2entry add failed: %s (%d)",
 496                                         mdb_strerror(rc), rc );
 497                                 Debug( LDAP_DEBUG_ANY,
 498                                         "=> mdb_tool_next_id: %s\n", text->bv_val, 0, 0 );
 499                         }
 500                 }
 501         } else if ( !hole ) {
 502                 unsigned i, j;
 503
 504                 e->e_id = id;
 505
 506                 for ( i=0; i<nholes; i++) {
 507                         if ( holes[i].id == e->e_id ) {
 508                                 free(holes[i].dn.bv_val);
 509                                 for (j=i;j<nholes;j++) holes[j] = holes[j+1];
 510                                 holes[j].id = 0;
 511                                 nholes--;
 512                                 break;
 513                         } else if ( holes[i].id > e->e_id ) {
 514                                 break;
 515                         }
 516                 }
 517         }
 518         return rc;
 519 }
 520
 521 static int
 522 mdb_tool_index_add(
 523         Operation *op,
 524         MDB_txn *txn,
 525         Entry *e )
 526 {
 527         struct mdb_info *mdb = (struct mdb_info *) op->o_bd->be_private;
 528
 529         if ( !mdb->mi_nattrs )
 530                 return 0;
 531
 532         if ( mdb_tool_threads > 1 ) {
 533                 IndexRec *ir;
 534                 int i, rc;
 535                 Attribute *a;
 536
 537                 ir = mdb_tool_index_rec;
 538                 for (i=0; i<mdb->mi_nattrs; i++)
 539                         ir[i].ir_attrs = NULL;
 540
 541                 for ( a = e->e_attrs; a != NULL; a = a->a_next ) {
 542                         rc = mdb_index_recset( mdb, a, a->a_desc->ad_type,
 543                                 &a->a_desc->ad_tags, ir );
 544                         if ( rc )
 545                                 return rc;
 546                 }
 547                 for (i=0; i<mdb->mi_nattrs; i++) {
 548                         if ( !ir[i].ir_ai )
 549                                 break;
 550                         rc = mdb_cursor_open( txn, ir[i].ir_ai->ai_dbi,
 551                                  &ir[i].ir_ai->ai_cursor );
 552                         if ( rc )
 553                                 return rc;
 554                 }
 555                 mdb_tool_ix_id = e->e_id;
 556                 mdb_tool_ix_op = op;
 557                 mdb_tool_ix_txn = txn;
 558                 ldap_pvt_thread_mutex_lock( &mdb_tool_index_mutex );
 559                 /* Wait for all threads to be ready */
 560                 while ( mdb_tool_index_tcount ) {
 561                         ldap_pvt_thread_cond_wait( &mdb_tool_index_cond_main,
 562                                 &mdb_tool_index_mutex );
 563                 }
 564
 565                 for ( i=1; i<mdb_tool_threads; i++ )
 566                         mdb_tool_index_rec[i].ir_i = LDAP_BUSY;
 567                 mdb_tool_index_tcount = mdb_tool_threads - 1;
 568                 ldap_pvt_thread_mutex_unlock( &mdb_tool_index_mutex );
 569                 ldap_pvt_thread_cond_broadcast( &mdb_tool_index_cond_work );
 570
 571                 rc = mdb_index_recrun( op, txn, mdb, ir, e->e_id, 0 );
 572                 if ( rc )
 573                         return rc;
 574                 ldap_pvt_thread_mutex_lock( &mdb_tool_index_mutex );
 575                 for ( i=1; i<mdb_tool_threads; i++ ) {
 576                         if ( mdb_tool_index_rec[i].ir_i == LDAP_BUSY ) {
 577                                 ldap_pvt_thread_cond_wait( &mdb_tool_index_cond_main,
 578                                         &mdb_tool_index_mutex );
 579                                 i--;
 580                                 continue;
 581                         }
 582                         if ( mdb_tool_index_rec[i].ir_i ) {
 583                                 rc = mdb_tool_index_rec[i].ir_i;
 584                                 break;
 585                         }
 586                 }
 587                 ldap_pvt_thread_mutex_unlock( &mdb_tool_index_mutex );
 588                 return rc;
 589         } else
 590         {
 591                 return mdb_index_entry_add( op, txn, e );
 592         }
 593 }
 594
 595 ID mdb_tool_entry_put(
 596         BackendDB *be,
 597         Entry *e,
 598         struct berval *text )
 599 {
 600         int rc;
 601         struct mdb_info *mdb;
 602         Operation op = {0};
 603         Opheader ohdr = {0};
 604
 605         assert( be != NULL );
 606         assert( slapMode & SLAP_TOOL_MODE );
 607
 608         assert( text != NULL );
 609         assert( text->bv_val != NULL );
 610         assert( text->bv_val[0] == '\0' );      /* overconservative? */
 611
 612         Debug( LDAP_DEBUG_TRACE, "=> " LDAP_XSTRING(mdb_tool_entry_put)
 613                 "( %ld, \"%s\" )\n", (long) e->e_id, e->e_dn, 0 );
 614
 615         mdb = (struct mdb_info *) be->be_private;
 616
 617         if ( !txn ) {
 618                 rc = mdb_txn_begin( mdb->mi_dbenv, NULL, 0, &txn );
 619                 if( rc != 0 ) {
 620                         snprintf( text->bv_val, text->bv_len,
 621                                 "txn_begin failed: %s (%d)",
 622                                 mdb_strerror(rc), rc );
 623                         Debug( LDAP_DEBUG_ANY,
 624                                 "=> " LDAP_XSTRING(mdb_tool_entry_put) ": %s\n",
 625                                  text->bv_val, 0, 0 );
 626                         return NOID;
 627                 }
 628                 rc = mdb_cursor_open( txn, mdb->mi_id2entry, &idcursor );
 629                 if( rc != 0 ) {
 630                         snprintf( text->bv_val, text->bv_len,
 631                                 "cursor_open failed: %s (%d)",
 632                                 mdb_strerror(rc), rc );
 633                         Debug( LDAP_DEBUG_ANY,
 634                                 "=> " LDAP_XSTRING(mdb_tool_entry_put) ": %s\n",
 635                                  text->bv_val, 0, 0 );
 636                         return NOID;
 637                 }
 638                 if ( !mdb->mi_nextid ) {
 639                         ID dummy;
 640                         mdb_next_id( be, idcursor, &dummy );
 641                 }
 642                 rc = mdb_cursor_open( txn, mdb->mi_dn2id, &mcp );
 643                 if( rc != 0 ) {
 644                         snprintf( text->bv_val, text->bv_len,
 645                                 "cursor_open failed: %s (%d)",
 646                                 mdb_strerror(rc), rc );
 647                         Debug( LDAP_DEBUG_ANY,
 648                                 "=> " LDAP_XSTRING(mdb_tool_entry_put) ": %s\n",
 649                                  text->bv_val, 0, 0 );
 650                         return NOID;
 651                 }
 652                 rc = mdb_cursor_open( txn, mdb->mi_dn2id, &mcd );
 653                 if( rc != 0 ) {
 654                         snprintf( text->bv_val, text->bv_len,
 655                                 "cursor_open failed: %s (%d)",
 656                                 mdb_strerror(rc), rc );
 657                         Debug( LDAP_DEBUG_ANY,
 658                                 "=> " LDAP_XSTRING(mdb_tool_entry_put) ": %s\n",
 659                                  text->bv_val, 0, 0 );
 660                         return NOID;
 661                 }
 662         }
 663
 664         op.o_hdr = &ohdr;
 665         op.o_bd = be;
 666         op.o_tmpmemctx = NULL;
 667         op.o_tmpmfuncs = &ch_mfuncs;
 668
 669         /* add dn2id indices */
 670         rc = mdb_tool_next_id( &op, txn, e, text, 0 );
 671         if( rc != 0 ) {
 672                 goto done;
 673         }
 674
 675         rc = mdb_tool_index_add( &op, txn, e );
 676         if( rc != 0 ) {
 677                 snprintf( text->bv_val, text->bv_len,
 678                                 "index_entry_add failed: err=%d", rc );
 679                 Debug( LDAP_DEBUG_ANY,
 680                         "=> " LDAP_XSTRING(mdb_tool_entry_put) ": %s\n",
 681                         text->bv_val, 0, 0 );
 682                 goto done;
 683         }
 684
 685
 686         /* id2entry index */
 687         rc = mdb_id2entry_add( &op, txn, idcursor, e );
 688         if( rc != 0 ) {
 689                 snprintf( text->bv_val, text->bv_len,
 690                                 "id2entry_add failed: err=%d", rc );
 691                 Debug( LDAP_DEBUG_ANY,
 692                         "=> " LDAP_XSTRING(mdb_tool_entry_put) ": %s\n",
 693                         text->bv_val, 0, 0 );
 694                 goto done;
 695         }
 696
 697 done:
 698         if( rc == 0 ) {
 699                 mdb_writes++;
 700                 if ( mdb_writes >= mdb_writes_per_commit ) {
 701                         unsigned i;
 702                         MDB_TOOL_IDL_FLUSH( be, txn );
 703                         rc = mdb_txn_commit( txn );
 704                         for ( i=0; i<mdb->mi_nattrs; i++ )
 705                                 mdb->mi_attrs[i]->ai_cursor = NULL;
 706                         mdb_writes = 0;
 707                         txn = NULL;
 708                         idcursor = NULL;
 709                         if( rc != 0 ) {
 710                                 snprintf( text->bv_val, text->bv_len,
 711                                                 "txn_commit failed: %s (%d)",
 712                                                 mdb_strerror(rc), rc );
 713                                 Debug( LDAP_DEBUG_ANY,
 714                                         "=> " LDAP_XSTRING(mdb_tool_entry_put) ": %s\n",
 715                                         text->bv_val, 0, 0 );
 716                                 e->e_id = NOID;
 717                         }
 718                 }
 719
 720         } else {
 721                 unsigned i;
 722                 mdb_txn_abort( txn );
 723                 txn = NULL;
 724                 idcursor = NULL;
 725                 for ( i=0; i<mdb->mi_nattrs; i++ )
 726                         mdb->mi_attrs[i]->ai_cursor = NULL;
 727                 mdb_writes = 0;
 728                 snprintf( text->bv_val, text->bv_len,
 729                         "txn_aborted! %s (%d)",
 730                         rc == LDAP_OTHER ? "Internal error" :
 731                         mdb_strerror(rc), rc );
 732                 Debug( LDAP_DEBUG_ANY,
 733                         "=> " LDAP_XSTRING(mdb_tool_entry_put) ": %s\n",
 734                         text->bv_val, 0, 0 );
 735                 e->e_id = NOID;
 736         }
 737
 738         return e->e_id;
 739 }
 740
 741 int mdb_tool_entry_reindex(
 742         BackendDB *be,
 743         ID id,
 744         AttributeDescription **adv )
 745 {
 746         struct mdb_info *mi = (struct mdb_info *) be->be_private;
 747         int rc;
 748         Entry *e;
 749         Operation op = {0};
 750         Opheader ohdr = {0};
 751
 752         Debug( LDAP_DEBUG_ARGS,
 753                 "=> " LDAP_XSTRING(mdb_tool_entry_reindex) "( %ld )\n",
 754                 (long) id, 0, 0 );
 755         assert( tool_base == NULL );
 756         assert( tool_filter == NULL );
 757
 758         /* No indexes configured, nothing to do. Could return an
 759          * error here to shortcut things.
 760          */
 761         if (!mi->mi_attrs) {
 762                 return 0;
 763         }
 764
 765         /* Check for explicit list of attrs to index */
 766         if ( adv ) {
 767                 int i, j, n;
 768
 769                 if ( mi->mi_attrs[0]->ai_desc != adv[0] ) {
 770                         /* count */
 771                         for ( n = 0; adv[n]; n++ ) ;
 772
 773                         /* insertion sort */
 774                         for ( i = 0; i < n; i++ ) {
 775                                 AttributeDescription *ad = adv[i];
 776                                 for ( j = i-1; j>=0; j--) {
 777                                         if ( SLAP_PTRCMP( adv[j], ad ) <= 0 ) break;
 778                                         adv[j+1] = adv[j];
 779                                 }
 780                                 adv[j+1] = ad;
 781                         }
 782                 }
 783
 784                 for ( i = 0; adv[i]; i++ ) {
 785                         if ( mi->mi_attrs[i]->ai_desc != adv[i] ) {
 786                                 for ( j = i+1; j < mi->mi_nattrs; j++ ) {
 787                                         if ( mi->mi_attrs[j]->ai_desc == adv[i] ) {
 788                                                 AttrInfo *ai = mi->mi_attrs[i];
 789                                                 mi->mi_attrs[i] = mi->mi_attrs[j];
 790                                                 mi->mi_attrs[j] = ai;
 791                                                 break;
 792                                         }
 793                                 }
 794                                 if ( j == mi->mi_nattrs ) {
 795                                         Debug( LDAP_DEBUG_ANY,
 796                                                 LDAP_XSTRING(mdb_tool_entry_reindex)
 797                                                 ": no index configured for %s\n",
 798                                                 adv[i]->ad_cname.bv_val, 0, 0 );
 799                                         return -1;
 800                                 }
 801                         }
 802                 }
 803                 mi->mi_nattrs = i;
 804         }
 805
 806         e = mdb_tool_entry_get( be, id );
 807
 808         if( e == NULL ) {
 809                 Debug( LDAP_DEBUG_ANY,
 810                         LDAP_XSTRING(mdb_tool_entry_reindex)
 811                         ": could not locate id=%ld\n",
 812                         (long) id, 0, 0 );
 813                 return -1;
 814         }
 815
 816         if ( !txi ) {
 817                 rc = mdb_txn_begin( mi->mi_dbenv, NULL, 0, &txi );
 818                 if( rc != 0 ) {
 819                         Debug( LDAP_DEBUG_ANY,
 820                                 "=> " LDAP_XSTRING(mdb_tool_entry_reindex) ": "
 821                                 "txn_begin failed: %s (%d)\n",
 822                                 mdb_strerror(rc), rc, 0 );
 823                         goto done;
 824                 }
 825         }
 826
 827         if ( slapMode & SLAP_TRUNCATE_MODE ) {
 828                 int i;
 829                 for ( i=0; i < mi->mi_nattrs; i++ ) {
 830                         rc = mdb_drop( txi, mi->mi_attrs[i]->ai_dbi, 0 );
 831                         if ( rc ) {
 832                                 Debug( LDAP_DEBUG_ANY,
 833                                         LDAP_XSTRING(mdb_tool_entry_reindex)
 834                                         ": (Truncate) mdb_drop(%s) failed: %s (%d)\n",
 835                                         mi->mi_attrs[i]->ai_desc->ad_type->sat_cname.bv_val,
 836                                         mdb_strerror(rc), rc );
 837                                 return -1;
 838                         }
 839                 }
 840                 slapMode ^= SLAP_TRUNCATE_MODE;
 841         }
 842
 843         /*
 844          * just (re)add them for now
 845          * Use truncate mode to empty/reset index databases
 846          */
 847
 848         Debug( LDAP_DEBUG_TRACE,
 849                 "=> " LDAP_XSTRING(mdb_tool_entry_reindex) "( %ld )\n",
 850                 (long) id, 0, 0 );
 851
 852         op.o_hdr = &ohdr;
 853         op.o_bd = be;
 854         op.o_tmpmemctx = NULL;
 855         op.o_tmpmfuncs = &ch_mfuncs;
 856
 857         rc = mdb_tool_index_add( &op, txi, e );
 858
 859 done:
 860         if( rc == 0 ) {
 861                 mdb_writes++;
 862                 if ( mdb_writes >= mdb_writes_per_commit ) {
 863                         MDB_val key;
 864                         unsigned i;
 865                         MDB_TOOL_IDL_FLUSH( be, txi );
 866                         rc = mdb_txn_commit( txi );
 867                         mdb_writes = 0;
 868                         for ( i=0; i<mi->mi_nattrs; i++ )
 869                                 mi->mi_attrs[i]->ai_cursor = NULL;
 870                         if( rc != 0 ) {
 871                                 Debug( LDAP_DEBUG_ANY,
 872                                         "=> " LDAP_XSTRING(mdb_tool_entry_reindex)
 873                                         ": txn_commit failed: %s (%d)\n",
 874                                         mdb_strerror(rc), rc, 0 );
 875                                 e->e_id = NOID;
 876                         }
 877                         mdb_cursor_close( cursor );
 878                         txi = NULL;
 879                         /* Must close the read txn to allow old pages to be reclaimed. */
 880                         mdb_txn_abort( txn );
 881                         /* and then reopen it so that tool_entry_next still works. */
 882                         mdb_txn_begin( mi->mi_dbenv, NULL, MDB_RDONLY, &txn );
 883                         mdb_cursor_open( txn, mi->mi_id2entry, &cursor );
 884                         key.mv_data = &id;
 885                         key.mv_size = sizeof(ID);
 886                         mdb_cursor_get( cursor, &key, NULL, MDB_SET );
 887                 }
 888
 889         } else {
 890                 unsigned i;
 891                 mdb_writes = 0;
 892                 mdb_cursor_close( cursor );
 893                 cursor = NULL;
 894                 mdb_txn_abort( txi );
 895                 for ( i=0; i<mi->mi_nattrs; i++ )
 896                         mi->mi_attrs[i]->ai_cursor = NULL;
 897                 Debug( LDAP_DEBUG_ANY,
 898                         "=> " LDAP_XSTRING(mdb_tool_entry_reindex)
 899                         ": txn_aborted! err=%d\n",
 900                         rc, 0, 0 );
 901                 e->e_id = NOID;
 902                 txi = NULL;
 903         }
 904         mdb_entry_release( &op, e, 0 );
 905
 906         return rc;
 907 }
 908
 909 ID mdb_tool_entry_modify(
 910         BackendDB *be,
 911         Entry *e,
 912         struct berval *text )
 913 {
 914         int rc;
 915         struct mdb_info *mdb;
 916         Operation op = {0};
 917         Opheader ohdr = {0};
 918
 919         assert( be != NULL );
 920         assert( slapMode & SLAP_TOOL_MODE );
 921
 922         assert( text != NULL );
 923         assert( text->bv_val != NULL );
 924         assert( text->bv_val[0] == '\0' );      /* overconservative? */
 925
 926         assert ( e->e_id != NOID );
 927
 928         Debug( LDAP_DEBUG_TRACE,
 929                 "=> " LDAP_XSTRING(mdb_tool_entry_modify) "( %ld, \"%s\" )\n",
 930                 (long) e->e_id, e->e_dn, 0 );
 931
 932         mdb = (struct mdb_info *) be->be_private;
 933
 934         if( cursor ) {
 935                 mdb_cursor_close( cursor );
 936                 cursor = NULL;
 937         }
 938         if ( !txn ) {
 939                 rc = mdb_txn_begin( mdb->mi_dbenv, NULL, 0, &txn );
 940                 if( rc != 0 ) {
 941                         snprintf( text->bv_val, text->bv_len,
 942                                 "txn_begin failed: %s (%d)",
 943                                 mdb_strerror(rc), rc );
 944                         Debug( LDAP_DEBUG_ANY,
 945                                 "=> " LDAP_XSTRING(mdb_tool_entry_modify) ": %s\n",
 946                                  text->bv_val, 0, 0 );
 947                         return NOID;
 948                 }
 949         }
 950
 951         op.o_hdr = &ohdr;
 952         op.o_bd = be;
 953         op.o_tmpmemctx = NULL;
 954         op.o_tmpmfuncs = &ch_mfuncs;
 955
 956         /* id2entry index */
 957         rc = mdb_id2entry_update( &op, txn, NULL, e );
 958         if( rc != 0 ) {
 959                 snprintf( text->bv_val, text->bv_len,
 960                                 "id2entry_update failed: err=%d", rc );
 961                 Debug( LDAP_DEBUG_ANY,
 962                         "=> " LDAP_XSTRING(mdb_tool_entry_modify) ": %s\n",
 963                         text->bv_val, 0, 0 );
 964                 goto done;
 965         }
 966
 967 done:
 968         if( rc == 0 ) {
 969                 rc = mdb_txn_commit( txn );
 970                 if( rc != 0 ) {
 971                         snprintf( text->bv_val, text->bv_len,
 972                                         "txn_commit failed: %s (%d)",
 973                                         mdb_strerror(rc), rc );
 974                         Debug( LDAP_DEBUG_ANY,
 975                                 "=> " LDAP_XSTRING(mdb_tool_entry_modify) ": "
 976                                 "%s\n", text->bv_val, 0, 0 );
 977                         e->e_id = NOID;
 978                 }
 979
 980         } else {
 981                 mdb_txn_abort( txn );
 982                 snprintf( text->bv_val, text->bv_len,
 983                         "txn_aborted! %s (%d)",
 984                         mdb_strerror(rc), rc );
 985                 Debug( LDAP_DEBUG_ANY,
 986                         "=> " LDAP_XSTRING(mdb_tool_entry_modify) ": %s\n",
 987                         text->bv_val, 0, 0 );
 988                 e->e_id = NOID;
 989         }
 990         txn = NULL;
 991         idcursor = NULL;
 992
 993         return e->e_id;
 994 }
 995
 996 static void *
 997 mdb_tool_index_task( void *ctx, void *ptr )
 998 {
 999         int base = *(int *)ptr;
1000
1001         free( ptr );
1002         while ( 1 ) {
1003                 ldap_pvt_thread_mutex_lock( &mdb_tool_index_mutex );
1004                 mdb_tool_index_tcount--;
1005                 if ( !mdb_tool_index_tcount )
1006                         ldap_pvt_thread_cond_signal( &mdb_tool_index_cond_main );
1007                 ldap_pvt_thread_cond_wait( &mdb_tool_index_cond_work,
1008                         &mdb_tool_index_mutex );
1009                 if ( slapd_shutdown ) {
1010                         mdb_tool_index_tcount--;
1011                         if ( !mdb_tool_index_tcount )
1012                                 ldap_pvt_thread_cond_signal( &mdb_tool_index_cond_main );
1013                         ldap_pvt_thread_mutex_unlock( &mdb_tool_index_mutex );
1014                         break;
1015                 }
1016                 ldap_pvt_thread_mutex_unlock( &mdb_tool_index_mutex );
1017                 mdb_tool_index_rec[base].ir_i = mdb_index_recrun( mdb_tool_ix_op,
1018                         mdb_tool_ix_txn,
1019                         mdb_tool_info, mdb_tool_index_rec, mdb_tool_ix_id, base );
1020         }
1021
1022         return NULL;
1023 }
1024
1025 #ifdef MDB_TOOL_IDL_CACHING
1026 static int
1027 mdb_tool_idl_cmp( const void *v1, const void *v2 )
1028 {
1029         const mdb_tool_idl_cache *c1 = v1, *c2 = v2;
1030         int rc;
1031
1032         if (( rc = c1->kstr.bv_len - c2->kstr.bv_len )) return rc;
1033         return memcmp( c1->kstr.bv_val, c2->kstr.bv_val, c1->kstr.bv_len );
1034 }
1035
1036 static int
1037 mdb_tool_idl_flush_one( MDB_cursor *mc, AttrInfo *ai, mdb_tool_idl_cache *ic )
1038 {
1039         mdb_tool_idl_cache_entry *ice;
1040         MDB_val key, data[2];
1041         int i, rc;
1042         ID id, nid;
1043
1044         /* Freshly allocated, ignore it */
1045         if ( !ic->head && ic->count <= MDB_IDL_DB_SIZE ) {
1046                 return 0;
1047         }
1048
1049         key.mv_data = ic->kstr.bv_val;
1050         key.mv_size = ic->kstr.bv_len;
1051
1052         if ( ic->count > MDB_IDL_DB_SIZE ) {
1053                 while ( ic->flags & WAS_FOUND ) {
1054                         rc = mdb_cursor_get( mc, &key, data, MDB_SET );
1055                         if ( rc ) {
1056                                 /* FIXME: find out why this happens */
1057                                 ic->flags = 0;
1058                                 break;
1059                         }
1060                         if ( ic->flags & WAS_RANGE ) {
1061                                 /* Skip lo */
1062                                 rc = mdb_cursor_get( mc, &key, data, MDB_NEXT_DUP );
1063
1064                                 /* Get hi */
1065                                 rc = mdb_cursor_get( mc, &key, data, MDB_NEXT_DUP );
1066
1067                                 /* Store range hi */
1068                                 data[0].mv_data = &ic->last;
1069                                 rc = mdb_cursor_put( mc, &key, data, MDB_CURRENT );
1070                         } else {
1071                                 /* Delete old data, replace with range */
1072                                 ic->first = *(ID *)data[0].mv_data;
1073                                 mdb_cursor_del( mc, MDB_NODUPDATA );
1074                         }
1075                         break;
1076                 }
1077                 if ( !(ic->flags & WAS_RANGE)) {
1078                         /* range, didn't exist before */
1079                         nid = 0;
1080                         data[0].mv_size = sizeof(ID);
1081                         data[0].mv_data = &nid;
1082                         rc = mdb_cursor_put( mc, &key, data, 0 );
1083                         if ( rc == 0 ) {
1084                                 data[0].mv_data = &ic->first;
1085                                 rc = mdb_cursor_put( mc, &key, data, 0 );
1086                                 if ( rc == 0 ) {
1087                                         data[0].mv_data = &ic->last;
1088                                         rc = mdb_cursor_put( mc, &key, data, 0 );
1089                                 }
1090                         }
1091                         if ( rc ) {
1092                                 rc = -1;
1093                         }
1094                 }
1095         } else {
1096                 /* Normal write */
1097                 int n;
1098
1099                 data[0].mv_size = sizeof(ID);
1100                 rc = 0;
1101                 i = ic->offset;
1102                 for ( ice = ic->head, n=0; ice; ice = ice->next, n++ ) {
1103                         int end;
1104                         if ( ice->next ) {
1105                                 end = IDBLOCK;
1106                         } else {
1107                                 end = ic->count & (IDBLOCK-1);
1108                                 if ( !end )
1109                                         end = IDBLOCK;
1110                         }
1111                         data[1].mv_size = end - i;
1112                         data[0].mv_data = &ice->ids[i];
1113                         i = 0;
1114                         rc = mdb_cursor_put( mc, &key, data, MDB_NODUPDATA|MDB_APPEND|MDB_MULTIPLE );
1115                         if ( rc ) {
1116                                 if ( rc == MDB_KEYEXIST ) {
1117                                         rc = 0;
1118                                         continue;
1119                                 }
1120                                 rc = -1;
1121                                 break;
1122                         }
1123                 }
1124                 if ( ic->head ) {
1125                         ic->tail->next = ai->ai_flist;
1126                         ai->ai_flist = ic->head;
1127                 }
1128         }
1129         ic->head = ai->ai_clist;
1130         ai->ai_clist = ic;
1131         return rc;
1132 }
1133
1134 static int
1135 mdb_tool_idl_flush_db( MDB_txn *txn, AttrInfo *ai )
1136 {
1137         MDB_cursor *mc;
1138         Avlnode *root;
1139         int rc;
1140
1141         mdb_cursor_open( txn, ai->ai_dbi, &mc );
1142         root = tavl_end( ai->ai_root, TAVL_DIR_LEFT );
1143         do {
1144                 rc = mdb_tool_idl_flush_one( mc, ai, root->avl_data );
1145                 if ( rc != -1 )
1146                         rc = 0;
1147         } while ((root = tavl_next(root, TAVL_DIR_RIGHT)));
1148         mdb_cursor_close( mc );
1149
1150         return rc;
1151 }
1152
1153 static int
1154 mdb_tool_idl_flush( BackendDB *be, MDB_txn *txn )
1155 {
1156         struct mdb_info *mdb = (struct mdb_info *) be->be_private;
1157         int rc = 0;
1158         unsigned int i, dbi;
1159
1160         for ( i=0; i < mdb->mi_nattrs; i++ ) {
1161                 if ( !mdb->mi_attrs[i]->ai_root ) continue;
1162                 rc = mdb_tool_idl_flush_db( txn, mdb->mi_attrs[i] );
1163                 tavl_free(mdb->mi_attrs[i]->ai_root, NULL);
1164                 mdb->mi_attrs[i]->ai_root = NULL;
1165                 if ( rc )
1166                         break;
1167         }
1168         return rc;
1169 }
1170
1171 int mdb_tool_idl_add(
1172         BackendDB *be,
1173         MDB_cursor *mc,
1174         struct berval *keys,
1175         ID id )
1176 {
1177         MDB_dbi dbi;
1178         mdb_tool_idl_cache *ic, itmp;
1179         mdb_tool_idl_cache_entry *ice;
1180         int i, rc, lcount;
1181         AttrInfo *ai = (AttrInfo *)mc;
1182         mc = ai->ai_cursor;
1183
1184         dbi = ai->ai_dbi;
1185         for (i=0; keys[i].bv_val; i++) {
1186         itmp.kstr = keys[i];
1187         ic = tavl_find( (Avlnode *)ai->ai_root, &itmp, mdb_tool_idl_cmp );
1188
1189         /* No entry yet, create one */
1190         if ( !ic ) {
1191                 MDB_val key, data;
1192                 ID nid;
1193                 int rc;
1194
1195                 if ( ai->ai_clist ) {
1196                         ic = ai->ai_clist;
1197                         ai->ai_clist = ic->head;
1198                 } else {
1199                         ic = ch_malloc( sizeof( mdb_tool_idl_cache ) + itmp.kstr.bv_len + 4 );
1200                 }
1201                 ic->kstr.bv_len = itmp.kstr.bv_len;
1202                 ic->kstr.bv_val = (char *)(ic+1);
1203                 memcpy( ic->kstr.bv_val, itmp.kstr.bv_val, ic->kstr.bv_len );
1204                 ic->head = ic->tail = NULL;
1205                 ic->last = 0;
1206                 ic->count = 0;
1207                 ic->offset = 0;
1208                 ic->flags = 0;
1209                 tavl_insert( (Avlnode **)&ai->ai_root, ic, mdb_tool_idl_cmp,
1210                         avl_dup_error );
1211
1212                 /* load existing key count here */
1213                 key.mv_size = keys[i].bv_len;
1214                 key.mv_data = keys[i].bv_val;
1215                 rc = mdb_cursor_get( mc, &key, &data, MDB_SET );
1216                 if ( rc == 0 ) {
1217                         ic->flags |= WAS_FOUND;
1218                         nid = *(ID *)data.mv_data;
1219                         if ( nid == 0 ) {
1220                                 ic->count = MDB_IDL_DB_SIZE+1;
1221                                 ic->flags |= WAS_RANGE;
1222                         } else {
1223                                 size_t count;
1224
1225                                 mdb_cursor_count( mc, &count );
1226                                 ic->count = count;
1227                                 ic->first = nid;
1228                                 ic->offset = count & (IDBLOCK-1);
1229                         }
1230                 }
1231         }
1232         /* are we a range already? */
1233         if ( ic->count > MDB_IDL_DB_SIZE ) {
1234                 ic->last = id;
1235                 continue;
1236         /* Are we at the limit, and converting to a range? */
1237         } else if ( ic->count == MDB_IDL_DB_SIZE ) {
1238                 if ( ic->head ) {
1239                         ic->tail->next = ai->ai_flist;
1240                         ai->ai_flist = ic->head;
1241                 }
1242                 ic->head = ic->tail = NULL;
1243                 ic->last = id;
1244                 ic->count++;
1245                 continue;
1246         }
1247         /* No free block, create that too */
1248         lcount = ic->count & (IDBLOCK-1);
1249         if ( !ic->tail || lcount == 0) {
1250                 if ( ai->ai_flist ) {
1251                         ice = ai->ai_flist;
1252                         ai->ai_flist = ice->next;
1253                 } else {
1254                         ice = ch_malloc( sizeof( mdb_tool_idl_cache_entry ));
1255                 }
1256                 ice->next = NULL;
1257                 if ( !ic->head ) {
1258                         ic->head = ice;
1259                 } else {
1260                         ic->tail->next = ice;
1261                 }
1262                 ic->tail = ice;
1263                 if ( lcount )
1264                         ice->ids[lcount-1] = 0;
1265                 if ( !ic->count )
1266                         ic->first = id;
1267         }
1268         ice = ic->tail;
1269         if (!lcount || ice->ids[lcount-1] != id)
1270                 ice->ids[lcount] = id;
1271         ic->count++;
1272         }
1273
1274         return 0;
1275 }
1276 #endif /* MDB_TOOL_IDL_CACHING */