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 2011-2012 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                                 mdb_tool_threads = slap_tool_thread_max - 1;
 110                                 if ( mdb_tool_threads > 1 ) {
 111                                         mdb_tool_index_rec = ch_calloc( mdb->mi_nattrs, sizeof( IndexRec ));
 112                                         mdb_tool_index_tcount = mdb_tool_threads - 1;
 113                                         for (i=1; i<mdb_tool_threads; i++) {
 114                                                 int *ptr = ch_malloc( sizeof( int ));
 115                                                 *ptr = i;
 116                                                 ldap_pvt_thread_pool_submit( &connection_pool,
 117                                                         mdb_tool_index_task, ptr );
 118                                         }
 119                                         mdb_tool_info = mdb;
 120                                 }
 121                         }
 122                 }
 123         }
 124
 125         return 0;
 126 }
 127
 128 int mdb_tool_entry_close(
 129         BackendDB *be )
 130 {
 131         if ( mdb_tool_info ) {
 132                 slapd_shutdown = 1;
 133                 ldap_pvt_thread_mutex_lock( &mdb_tool_index_mutex );
 134
 135                 /* There might still be some threads starting */
 136                 while ( mdb_tool_index_tcount > 0 ) {
 137                         ldap_pvt_thread_cond_wait( &mdb_tool_index_cond_main,
 138                                         &mdb_tool_index_mutex );
 139                 }
 140
 141                 mdb_tool_index_tcount = mdb_tool_threads - 1;
 142                 ldap_pvt_thread_cond_broadcast( &mdb_tool_index_cond_work );
 143
 144                 /* Make sure all threads are stopped */
 145                 while ( mdb_tool_index_tcount > 0 ) {
 146                         ldap_pvt_thread_cond_wait( &mdb_tool_index_cond_main,
 147                                 &mdb_tool_index_mutex );
 148                 }
 149                 ldap_pvt_thread_mutex_unlock( &mdb_tool_index_mutex );
 150
 151                 mdb_tool_info = NULL;
 152                 slapd_shutdown = 0;
 153                 ch_free( mdb_tool_index_rec );
 154                 mdb_tool_index_tcount = mdb_tool_threads - 1;
 155         }
 156
 157         if( idcursor ) {
 158                 mdb_cursor_close( idcursor );
 159                 idcursor = NULL;
 160         }
 161         if( cursor ) {
 162                 mdb_cursor_close( cursor );
 163                 cursor = NULL;
 164         }
 165         if( txn ) {
 166                 MDB_TOOL_IDL_FLUSH( be, txn );
 167                 if ( mdb_txn_commit( txn ))
 168                         return -1;
 169                 txn = NULL;
 170         }
 171
 172         if( nholes ) {
 173                 unsigned i;
 174                 fprintf( stderr, "Error, entries missing!\n");
 175                 for (i=0; i<nholes; i++) {
 176                         fprintf(stderr, "  entry %ld: %s\n",
 177                                 holes[i].id, holes[i].dn.bv_val);
 178                 }
 179                 nholes = 0;
 180                 return -1;
 181         }
 182
 183         return 0;
 184 }
 185
 186 ID
 187 mdb_tool_entry_first_x(
 188         BackendDB *be,
 189         struct berval *base,
 190         int scope,
 191         Filter *f )
 192 {
 193         tool_base = base;
 194         tool_scope = scope;
 195         tool_filter = f;
 196
 197         return mdb_tool_entry_next( be );
 198 }
 199
 200 ID mdb_tool_entry_next(
 201         BackendDB *be )
 202 {
 203         int rc;
 204         ID id;
 205         struct mdb_info *mdb;
 206
 207         assert( be != NULL );
 208         assert( slapMode & SLAP_TOOL_MODE );
 209
 210         mdb = (struct mdb_info *) be->be_private;
 211         assert( mdb != NULL );
 212
 213         if ( !txn ) {
 214                 rc = mdb_txn_begin( mdb->mi_dbenv, NULL, MDB_RDONLY, &txn );
 215                 if ( rc )
 216                         return NOID;
 217                 rc = mdb_cursor_open( txn, mdb->mi_id2entry, &cursor );
 218                 if ( rc ) {
 219                         mdb_txn_abort( txn );
 220                         return NOID;
 221                 }
 222         }
 223
 224 next:;
 225         rc = mdb_cursor_get( cursor, &key, &data, MDB_NEXT );
 226
 227         if( rc ) {
 228                 return NOID;
 229         }
 230
 231         previd = *(ID *)key.mv_data;
 232         id = previd;
 233
 234         if ( !data.mv_size )
 235                 goto next;
 236
 237         if ( tool_filter || tool_base ) {
 238                 static Operation op = {0};
 239                 static Opheader ohdr = {0};
 240
 241                 op.o_hdr = &ohdr;
 242                 op.o_bd = be;
 243                 op.o_tmpmemctx = NULL;
 244                 op.o_tmpmfuncs = &ch_mfuncs;
 245
 246                 if ( tool_next_entry ) {
 247                         mdb_entry_release( &op, tool_next_entry, 0 );
 248                         tool_next_entry = NULL;
 249                 }
 250
 251                 rc = mdb_tool_entry_get_int( be, id, &tool_next_entry );
 252                 if ( rc == LDAP_NO_SUCH_OBJECT ) {
 253                         goto next;
 254                 }
 255
 256                 assert( tool_next_entry != NULL );
 257
 258                 if ( tool_filter && test_filter( NULL, tool_next_entry, tool_filter ) != LDAP_COMPARE_TRUE )
 259                 {
 260                         mdb_entry_release( &op, tool_next_entry, 0 );
 261                         tool_next_entry = NULL;
 262                         goto next;
 263                 }
 264         }
 265
 266         return id;
 267 }
 268
 269 ID mdb_tool_dn2id_get(
 270         Backend *be,
 271         struct berval *dn
 272 )
 273 {
 274         struct mdb_info *mdb;
 275         Operation op = {0};
 276         Opheader ohdr = {0};
 277         ID id;
 278         int rc;
 279
 280         if ( BER_BVISEMPTY(dn) )
 281                 return 0;
 282
 283         mdb = (struct mdb_info *) be->be_private;
 284
 285         if ( !txn ) {
 286                 rc = mdb_txn_begin( mdb->mi_dbenv, NULL, (slapMode & SLAP_TOOL_READONLY) != 0 ?
 287                         MDB_RDONLY : 0, &txn );
 288                 if ( rc )
 289                         return NOID;
 290         }
 291
 292         op.o_hdr = &ohdr;
 293         op.o_bd = be;
 294         op.o_tmpmemctx = NULL;
 295         op.o_tmpmfuncs = &ch_mfuncs;
 296
 297         rc = mdb_dn2id( &op, txn, NULL, dn, &id, NULL, NULL );
 298         if ( rc == MDB_NOTFOUND )
 299                 return NOID;
 300
 301         return id;
 302 }
 303
 304 static int
 305 mdb_tool_entry_get_int( BackendDB *be, ID id, Entry **ep )
 306 {
 307         Operation op = {0};
 308         Opheader ohdr = {0};
 309
 310         Entry *e = NULL;
 311         struct berval dn = BER_BVNULL, ndn = BER_BVNULL;
 312         int rc;
 313
 314         assert( be != NULL );
 315         assert( slapMode & SLAP_TOOL_MODE );
 316
 317         if ( ( tool_filter || tool_base ) && id == previd && tool_next_entry != NULL ) {
 318                 *ep = tool_next_entry;
 319                 tool_next_entry = NULL;
 320                 return LDAP_SUCCESS;
 321         }
 322
 323         if ( id != previd ) {
 324                 key.mv_size = sizeof(ID);
 325                 key.mv_data = &id;
 326                 rc = mdb_cursor_get( cursor, &key, &data, MDB_SET );
 327                 if ( rc ) {
 328                         rc = LDAP_OTHER;
 329                         goto done;
 330                 }
 331         }
 332         if ( !data.mv_size ) {
 333                 rc = LDAP_NO_SUCH_OBJECT;
 334                 goto done;
 335         }
 336
 337         op.o_hdr = &ohdr;
 338         op.o_bd = be;
 339         op.o_tmpmemctx = NULL;
 340         op.o_tmpmfuncs = &ch_mfuncs;
 341         if ( slapMode & SLAP_TOOL_READONLY ) {
 342                 rc = mdb_id2name( &op, txn, &idcursor, id, &dn, &ndn );
 343                 if ( rc  ) {
 344                         rc = LDAP_OTHER;
 345                         if ( e ) {
 346                                 mdb_entry_return( &op, e );
 347                                 e = NULL;
 348                         }
 349                         goto done;
 350                 }
 351                 if ( tool_base != NULL ) {
 352                         if ( !dnIsSuffixScope( &ndn, tool_base, tool_scope ) ) {
 353                                 ch_free( dn.bv_val );
 354                                 ch_free( ndn.bv_val );
 355                                 rc = LDAP_NO_SUCH_OBJECT;
 356                                 goto done;
 357                         }
 358                 }
 359         }
 360         rc = mdb_entry_decode( &op, &data, &e );
 361         e->e_id = id;
 362         if ( !BER_BVISNULL( &dn )) {
 363                 e->e_name = dn;
 364                 e->e_nname = ndn;
 365         } else {
 366                 e->e_name.bv_val = NULL;
 367                 e->e_nname.bv_val = NULL;
 368         }
 369
 370 done:
 371         if ( e != NULL ) {
 372                 *ep = e;
 373         }
 374
 375         return rc;
 376 }
 377
 378 Entry*
 379 mdb_tool_entry_get( BackendDB *be, ID id )
 380 {
 381         Entry *e = NULL;
 382         int rc;
 383
 384         if ( !txn ) {
 385                 struct mdb_info *mdb = (struct mdb_info *) be->be_private;
 386                 rc = mdb_txn_begin( mdb->mi_dbenv, NULL,
 387                         (slapMode & SLAP_TOOL_READONLY) ? MDB_RDONLY : 0, &txn );
 388                 if ( rc )
 389                         return NULL;
 390         }
 391         if ( !cursor ) {
 392                 struct mdb_info *mdb = (struct mdb_info *) be->be_private;
 393                 rc = mdb_cursor_open( txn, mdb->mi_id2entry, &cursor );
 394                 if ( rc ) {
 395                         mdb_txn_abort( txn );
 396                         txn = NULL;
 397                         return NULL;
 398                 }
 399         }
 400         (void)mdb_tool_entry_get_int( be, id, &e );
 401         return e;
 402 }
 403
 404 static int mdb_tool_next_id(
 405         Operation *op,
 406         MDB_txn *tid,
 407         Entry *e,
 408         struct berval *text,
 409         int hole )
 410 {
 411         struct mdb_info *mdb = (struct mdb_info *) op->o_bd->be_private;
 412         struct berval dn = e->e_name;
 413         struct berval ndn = e->e_nname;
 414         struct berval pdn, npdn, nmatched;
 415         ID id, pid = 0;
 416         int rc;
 417
 418         if (ndn.bv_len == 0) {
 419                 e->e_id = 0;
 420                 return 0;
 421         }
 422
 423         rc = mdb_dn2id( op, tid, mcp, &ndn, &id, NULL, &nmatched );
 424         if ( rc == MDB_NOTFOUND ) {
 425                 if ( !be_issuffix( op->o_bd, &ndn ) ) {
 426                         ID eid = e->e_id;
 427                         dnParent( &ndn, &npdn );
 428                         if ( nmatched.bv_len != npdn.bv_len ) {
 429                                 dnParent( &dn, &pdn );
 430                                 e->e_name = pdn;
 431                                 e->e_nname = npdn;
 432                                 rc = mdb_tool_next_id( op, tid, e, text, 1 );
 433                                 e->e_name = dn;
 434                                 e->e_nname = ndn;
 435                                 if ( rc ) {
 436                                         return rc;
 437                                 }
 438                                 /* If parent didn't exist, it was created just now
 439                                  * and its ID is now in e->e_id. Make sure the current
 440                                  * entry gets added under the new parent ID.
 441                                  */
 442                                 if ( eid != e->e_id ) {
 443                                         pid = e->e_id;
 444                                 }
 445                         } else {
 446                                 pid = id;
 447                         }
 448                 }
 449                 rc = mdb_next_id( op->o_bd, idcursor, &e->e_id );
 450                 if ( rc ) {
 451                         snprintf( text->bv_val, text->bv_len,
 452                                 "next_id failed: %s (%d)",
 453                                 mdb_strerror(rc), rc );
 454                 Debug( LDAP_DEBUG_ANY,
 455                         "=> mdb_tool_next_id: %s\n", text->bv_val, 0, 0 );
 456                         return rc;
 457                 }
 458                 rc = mdb_dn2id_add( op, mcp, mcd, pid, e );
 459                 if ( rc ) {
 460                         snprintf( text->bv_val, text->bv_len,
 461                                 "dn2id_add failed: %s (%d)",
 462                                 mdb_strerror(rc), rc );
 463                         Debug( LDAP_DEBUG_ANY,
 464                                 "=> mdb_tool_next_id: %s\n", text->bv_val, 0, 0 );
 465                 } else if ( hole ) {
 466                         MDB_val key, data;
 467                         if ( nholes == nhmax - 1 ) {
 468                                 if ( holes == hbuf ) {
 469                                         holes = ch_malloc( nhmax * sizeof(dn_id) * 2 );
 470                                         AC_MEMCPY( holes, hbuf, sizeof(hbuf) );
 471                                 } else {
 472                                         holes = ch_realloc( holes, nhmax * sizeof(dn_id) * 2 );
 473                                 }
 474                                 nhmax *= 2;
 475                         }
 476                         ber_dupbv( &holes[nholes].dn, &ndn );
 477                         holes[nholes++].id = e->e_id;
 478                         key.mv_size = sizeof(ID);
 479                         key.mv_data = &e->e_id;
 480                         data.mv_size = 0;
 481                         data.mv_data = NULL;
 482                         rc = mdb_cursor_put( idcursor, &key, &data, MDB_NOOVERWRITE );
 483                         if ( rc == MDB_KEYEXIST )
 484                                 rc = 0;
 485                         if ( rc ) {
 486                                 snprintf( text->bv_val, text->bv_len,
 487                                         "dummy id2entry add failed: %s (%d)",
 488                                         mdb_strerror(rc), rc );
 489                                 Debug( LDAP_DEBUG_ANY,
 490                                         "=> mdb_tool_next_id: %s\n", text->bv_val, 0, 0 );
 491                         }
 492                 }
 493         } else if ( !hole ) {
 494                 unsigned i, j;
 495
 496                 e->e_id = id;
 497
 498                 for ( i=0; i<nholes; i++) {
 499                         if ( holes[i].id == e->e_id ) {
 500                                 free(holes[i].dn.bv_val);
 501                                 for (j=i;j<nholes;j++) holes[j] = holes[j+1];
 502                                 holes[j].id = 0;
 503                                 nholes--;
 504                                 break;
 505                         } else if ( holes[i].id > e->e_id ) {
 506                                 break;
 507                         }
 508                 }
 509         }
 510         return rc;
 511 }
 512
 513 static int
 514 mdb_tool_index_add(
 515         Operation *op,
 516         MDB_txn *txn,
 517         Entry *e )
 518 {
 519         struct mdb_info *mdb = (struct mdb_info *) op->o_bd->be_private;
 520
 521         if ( !mdb->mi_nattrs )
 522                 return 0;
 523
 524         if ( mdb_tool_threads > 1 ) {
 525                 IndexRec *ir;
 526                 int i, rc;
 527                 Attribute *a;
 528
 529                 ir = mdb_tool_index_rec;
 530                 for (i=0; i<mdb->mi_nattrs; i++)
 531                         ir[i].ir_attrs = NULL;
 532
 533                 for ( a = e->e_attrs; a != NULL; a = a->a_next ) {
 534                         rc = mdb_index_recset( mdb, a, a->a_desc->ad_type,
 535                                 &a->a_desc->ad_tags, ir );
 536                         if ( rc )
 537                                 return rc;
 538                 }
 539                 for (i=0; i<mdb->mi_nattrs; i++) {
 540                         if ( !ir[i].ir_ai )
 541                                 break;
 542                         rc = mdb_cursor_open( txn, ir[i].ir_ai->ai_dbi,
 543                                  &ir[i].ir_ai->ai_cursor );
 544                         if ( rc )
 545                                 return rc;
 546                 }
 547                 mdb_tool_ix_id = e->e_id;
 548                 mdb_tool_ix_op = op;
 549                 mdb_tool_ix_txn = txn;
 550                 ldap_pvt_thread_mutex_lock( &mdb_tool_index_mutex );
 551                 /* Wait for all threads to be ready */
 552                 while ( mdb_tool_index_tcount ) {
 553                         ldap_pvt_thread_cond_wait( &mdb_tool_index_cond_main,
 554                                 &mdb_tool_index_mutex );
 555                 }
 556
 557                 for ( i=1; i<mdb_tool_threads; i++ )
 558                         mdb_tool_index_rec[i].ir_i = LDAP_BUSY;
 559                 mdb_tool_index_tcount = mdb_tool_threads - 1;
 560                 ldap_pvt_thread_mutex_unlock( &mdb_tool_index_mutex );
 561                 ldap_pvt_thread_cond_broadcast( &mdb_tool_index_cond_work );
 562
 563                 rc = mdb_index_recrun( op, txn, mdb, ir, e->e_id, 0 );
 564                 if ( rc )
 565                         return rc;
 566                 ldap_pvt_thread_mutex_lock( &mdb_tool_index_mutex );
 567                 for ( i=1; i<mdb_tool_threads; i++ ) {
 568                         if ( mdb_tool_index_rec[i].ir_i == LDAP_BUSY ) {
 569                                 ldap_pvt_thread_cond_wait( &mdb_tool_index_cond_main,
 570                                         &mdb_tool_index_mutex );
 571                                 i--;
 572                                 continue;
 573                         }
 574                         if ( mdb_tool_index_rec[i].ir_i ) {
 575                                 rc = mdb_tool_index_rec[i].ir_i;
 576                                 break;
 577                         }
 578                 }
 579                 ldap_pvt_thread_mutex_unlock( &mdb_tool_index_mutex );
 580                 return rc;
 581         } else
 582         {
 583                 return mdb_index_entry_add( op, txn, e );
 584         }
 585 }
 586
 587 ID mdb_tool_entry_put(
 588         BackendDB *be,
 589         Entry *e,
 590         struct berval *text )
 591 {
 592         int rc;
 593         struct mdb_info *mdb;
 594         Operation op = {0};
 595         Opheader ohdr = {0};
 596
 597         assert( be != NULL );
 598         assert( slapMode & SLAP_TOOL_MODE );
 599
 600         assert( text != NULL );
 601         assert( text->bv_val != NULL );
 602         assert( text->bv_val[0] == '\0' );      /* overconservative? */
 603
 604         Debug( LDAP_DEBUG_TRACE, "=> " LDAP_XSTRING(mdb_tool_entry_put)
 605                 "( %ld, \"%s\" )\n", (long) e->e_id, e->e_dn, 0 );
 606
 607         mdb = (struct mdb_info *) be->be_private;
 608
 609         if ( !txn ) {
 610                 rc = mdb_txn_begin( mdb->mi_dbenv, NULL, 0, &txn );
 611                 if( rc != 0 ) {
 612                         snprintf( text->bv_val, text->bv_len,
 613                                 "txn_begin failed: %s (%d)",
 614                                 mdb_strerror(rc), rc );
 615                         Debug( LDAP_DEBUG_ANY,
 616                                 "=> " LDAP_XSTRING(mdb_tool_entry_put) ": %s\n",
 617                                  text->bv_val, 0, 0 );
 618                         return NOID;
 619                 }
 620                 rc = mdb_cursor_open( txn, mdb->mi_id2entry, &idcursor );
 621                 if( rc != 0 ) {
 622                         snprintf( text->bv_val, text->bv_len,
 623                                 "cursor_open failed: %s (%d)",
 624                                 mdb_strerror(rc), rc );
 625                         Debug( LDAP_DEBUG_ANY,
 626                                 "=> " LDAP_XSTRING(mdb_tool_entry_put) ": %s\n",
 627                                  text->bv_val, 0, 0 );
 628                         return NOID;
 629                 }
 630                 if ( !mdb->mi_nextid ) {
 631                         ID dummy;
 632                         mdb_next_id( be, idcursor, &dummy );
 633                 }
 634                 rc = mdb_cursor_open( txn, mdb->mi_dn2id, &mcp );
 635                 if( rc != 0 ) {
 636                         snprintf( text->bv_val, text->bv_len,
 637                                 "cursor_open failed: %s (%d)",
 638                                 mdb_strerror(rc), rc );
 639                         Debug( LDAP_DEBUG_ANY,
 640                                 "=> " LDAP_XSTRING(mdb_tool_entry_put) ": %s\n",
 641                                  text->bv_val, 0, 0 );
 642                         return NOID;
 643                 }
 644                 rc = mdb_cursor_open( txn, mdb->mi_dn2id, &mcd );
 645                 if( rc != 0 ) {
 646                         snprintf( text->bv_val, text->bv_len,
 647                                 "cursor_open failed: %s (%d)",
 648                                 mdb_strerror(rc), rc );
 649                         Debug( LDAP_DEBUG_ANY,
 650                                 "=> " LDAP_XSTRING(mdb_tool_entry_put) ": %s\n",
 651                                  text->bv_val, 0, 0 );
 652                         return NOID;
 653                 }
 654         }
 655
 656         op.o_hdr = &ohdr;
 657         op.o_bd = be;
 658         op.o_tmpmemctx = NULL;
 659         op.o_tmpmfuncs = &ch_mfuncs;
 660
 661         /* add dn2id indices */
 662         rc = mdb_tool_next_id( &op, txn, e, text, 0 );
 663         if( rc != 0 ) {
 664                 goto done;
 665         }
 666
 667         rc = mdb_tool_index_add( &op, txn, e );
 668         if( rc != 0 ) {
 669                 snprintf( text->bv_val, text->bv_len,
 670                                 "index_entry_add failed: err=%d", rc );
 671                 Debug( LDAP_DEBUG_ANY,
 672                         "=> " LDAP_XSTRING(mdb_tool_entry_put) ": %s\n",
 673                         text->bv_val, 0, 0 );
 674                 goto done;
 675         }
 676
 677
 678         /* id2entry index */
 679         rc = mdb_id2entry_add( &op, txn, idcursor, e );
 680         if( rc != 0 ) {
 681                 snprintf( text->bv_val, text->bv_len,
 682                                 "id2entry_add failed: err=%d", rc );
 683                 Debug( LDAP_DEBUG_ANY,
 684                         "=> " LDAP_XSTRING(mdb_tool_entry_put) ": %s\n",
 685                         text->bv_val, 0, 0 );
 686                 goto done;
 687         }
 688
 689 done:
 690         if( rc == 0 ) {
 691                 mdb_writes++;
 692                 if ( mdb_writes >= mdb_writes_per_commit ) {
 693                         unsigned i;
 694                         MDB_TOOL_IDL_FLUSH( be, txn );
 695                         rc = mdb_txn_commit( txn );
 696                         for ( i=0; i<mdb->mi_nattrs; i++ )
 697                                 mdb->mi_attrs[i]->ai_cursor = NULL;
 698                         mdb_writes = 0;
 699                         txn = NULL;
 700                         idcursor = NULL;
 701                         if( rc != 0 ) {
 702                                 snprintf( text->bv_val, text->bv_len,
 703                                                 "txn_commit failed: %s (%d)",
 704                                                 mdb_strerror(rc), rc );
 705                                 Debug( LDAP_DEBUG_ANY,
 706                                         "=> " LDAP_XSTRING(mdb_tool_entry_put) ": %s\n",
 707                                         text->bv_val, 0, 0 );
 708                                 e->e_id = NOID;
 709                         }
 710                 }
 711
 712         } else {
 713                 unsigned i;
 714                 mdb_txn_abort( txn );
 715                 txn = NULL;
 716                 idcursor = NULL;
 717                 for ( i=0; i<mdb->mi_nattrs; i++ )
 718                         mdb->mi_attrs[i]->ai_cursor = NULL;
 719                 mdb_writes = 0;
 720                 snprintf( text->bv_val, text->bv_len,
 721                         "txn_aborted! %s (%d)",
 722                         rc == LDAP_OTHER ? "Internal error" :
 723                         mdb_strerror(rc), rc );
 724                 Debug( LDAP_DEBUG_ANY,
 725                         "=> " LDAP_XSTRING(mdb_tool_entry_put) ": %s\n",
 726                         text->bv_val, 0, 0 );
 727                 e->e_id = NOID;
 728         }
 729
 730         return e->e_id;
 731 }
 732
 733 int mdb_tool_entry_reindex(
 734         BackendDB *be,
 735         ID id,
 736         AttributeDescription **adv )
 737 {
 738         struct mdb_info *mi = (struct mdb_info *) be->be_private;
 739         int rc;
 740         Entry *e;
 741         Operation op = {0};
 742         Opheader ohdr = {0};
 743
 744         Debug( LDAP_DEBUG_ARGS,
 745                 "=> " LDAP_XSTRING(mdb_tool_entry_reindex) "( %ld )\n",
 746                 (long) id, 0, 0 );
 747         assert( tool_base == NULL );
 748         assert( tool_filter == NULL );
 749
 750         /* No indexes configured, nothing to do. Could return an
 751          * error here to shortcut things.
 752          */
 753         if (!mi->mi_attrs) {
 754                 return 0;
 755         }
 756
 757         /* Check for explicit list of attrs to index */
 758         if ( adv ) {
 759                 int i, j, n;
 760
 761                 if ( mi->mi_attrs[0]->ai_desc != adv[0] ) {
 762                         /* count */
 763                         for ( n = 0; adv[n]; n++ ) ;
 764
 765                         /* insertion sort */
 766                         for ( i = 0; i < n; i++ ) {
 767                                 AttributeDescription *ad = adv[i];
 768                                 for ( j = i-1; j>=0; j--) {
 769                                         if ( SLAP_PTRCMP( adv[j], ad ) <= 0 ) break;
 770                                         adv[j+1] = adv[j];
 771                                 }
 772                                 adv[j+1] = ad;
 773                         }
 774                 }
 775
 776                 for ( i = 0; adv[i]; i++ ) {
 777                         if ( mi->mi_attrs[i]->ai_desc != adv[i] ) {
 778                                 for ( j = i+1; j < mi->mi_nattrs; j++ ) {
 779                                         if ( mi->mi_attrs[j]->ai_desc == adv[i] ) {
 780                                                 AttrInfo *ai = mi->mi_attrs[i];
 781                                                 mi->mi_attrs[i] = mi->mi_attrs[j];
 782                                                 mi->mi_attrs[j] = ai;
 783                                                 break;
 784                                         }
 785                                 }
 786                                 if ( j == mi->mi_nattrs ) {
 787                                         Debug( LDAP_DEBUG_ANY,
 788                                                 LDAP_XSTRING(mdb_tool_entry_reindex)
 789                                                 ": no index configured for %s\n",
 790                                                 adv[i]->ad_cname.bv_val, 0, 0 );
 791                                         return -1;
 792                                 }
 793                         }
 794                 }
 795                 mi->mi_nattrs = i;
 796         }
 797
 798         e = mdb_tool_entry_get( be, id );
 799
 800         if( e == NULL ) {
 801                 Debug( LDAP_DEBUG_ANY,
 802                         LDAP_XSTRING(mdb_tool_entry_reindex)
 803                         ": could not locate id=%ld\n",
 804                         (long) id, 0, 0 );
 805                 return -1;
 806         }
 807
 808         if ( !txi ) {
 809                 rc = mdb_txn_begin( mi->mi_dbenv, NULL, 0, &txi );
 810                 if( rc != 0 ) {
 811                         Debug( LDAP_DEBUG_ANY,
 812                                 "=> " LDAP_XSTRING(mdb_tool_entry_reindex) ": "
 813                                 "txn_begin failed: %s (%d)\n",
 814                                 mdb_strerror(rc), rc, 0 );
 815                         goto done;
 816                 }
 817         }
 818
 819         if ( slapMode & SLAP_TRUNCATE_MODE ) {
 820                 int i;
 821                 for ( i=0; i < mi->mi_nattrs; i++ ) {
 822                         rc = mdb_drop( txi, mi->mi_attrs[i]->ai_dbi, 0 );
 823                         if ( rc ) {
 824                                 Debug( LDAP_DEBUG_ANY,
 825                                         LDAP_XSTRING(mdb_tool_entry_reindex)
 826                                         ": (Truncate) mdb_drop(%s) failed: %s (%d)\n",
 827                                         mi->mi_attrs[i]->ai_desc->ad_type->sat_cname.bv_val,
 828                                         mdb_strerror(rc), rc );
 829                                 return -1;
 830                         }
 831                 }
 832                 slapMode ^= SLAP_TRUNCATE_MODE;
 833         }
 834
 835         /*
 836          * just (re)add them for now
 837          * Use truncate mode to empty/reset index databases
 838          */
 839
 840         Debug( LDAP_DEBUG_TRACE,
 841                 "=> " LDAP_XSTRING(mdb_tool_entry_reindex) "( %ld )\n",
 842                 (long) id, 0, 0 );
 843
 844         op.o_hdr = &ohdr;
 845         op.o_bd = be;
 846         op.o_tmpmemctx = NULL;
 847         op.o_tmpmfuncs = &ch_mfuncs;
 848
 849         rc = mdb_tool_index_add( &op, txi, e );
 850
 851 done:
 852         if( rc == 0 ) {
 853                 mdb_writes++;
 854                 if ( mdb_writes >= mdb_writes_per_commit ) {
 855                         MDB_val key;
 856                         unsigned i;
 857                         MDB_TOOL_IDL_FLUSH( be, txi );
 858                         rc = mdb_txn_commit( txi );
 859                         mdb_writes = 0;
 860                         for ( i=0; i<mi->mi_nattrs; i++ )
 861                                 mi->mi_attrs[i]->ai_cursor = NULL;
 862                         if( rc != 0 ) {
 863                                 Debug( LDAP_DEBUG_ANY,
 864                                         "=> " LDAP_XSTRING(mdb_tool_entry_reindex)
 865                                         ": txn_commit failed: %s (%d)\n",
 866                                         mdb_strerror(rc), rc, 0 );
 867                                 e->e_id = NOID;
 868                         }
 869                         mdb_cursor_close( cursor );
 870                         txi = NULL;
 871                         /* Must close the read txn to allow old pages to be reclaimed. */
 872                         mdb_txn_abort( txn );
 873                         /* and then reopen it so that tool_entry_next still works. */
 874                         mdb_txn_begin( mi->mi_dbenv, NULL, MDB_RDONLY, &txn );
 875                         mdb_cursor_open( txn, mi->mi_id2entry, &cursor );
 876                         key.mv_data = &id;
 877                         key.mv_size = sizeof(ID);
 878                         mdb_cursor_get( cursor, &key, NULL, MDB_SET );
 879                 }
 880
 881         } else {
 882                 unsigned i;
 883                 mdb_writes = 0;
 884                 mdb_cursor_close( cursor );
 885                 cursor = NULL;
 886                 mdb_txn_abort( txi );
 887                 for ( i=0; i<mi->mi_nattrs; i++ )
 888                         mi->mi_attrs[i]->ai_cursor = NULL;
 889                 Debug( LDAP_DEBUG_ANY,
 890                         "=> " LDAP_XSTRING(mdb_tool_entry_reindex)
 891                         ": txn_aborted! err=%d\n",
 892                         rc, 0, 0 );
 893                 e->e_id = NOID;
 894                 txi = NULL;
 895         }
 896         mdb_entry_release( &op, e, 0 );
 897
 898         return rc;
 899 }
 900
 901 ID mdb_tool_entry_modify(
 902         BackendDB *be,
 903         Entry *e,
 904         struct berval *text )
 905 {
 906         int rc;
 907         struct mdb_info *mdb;
 908         Operation op = {0};
 909         Opheader ohdr = {0};
 910
 911         assert( be != NULL );
 912         assert( slapMode & SLAP_TOOL_MODE );
 913
 914         assert( text != NULL );
 915         assert( text->bv_val != NULL );
 916         assert( text->bv_val[0] == '\0' );      /* overconservative? */
 917
 918         assert ( e->e_id != NOID );
 919
 920         Debug( LDAP_DEBUG_TRACE,
 921                 "=> " LDAP_XSTRING(mdb_tool_entry_modify) "( %ld, \"%s\" )\n",
 922                 (long) e->e_id, e->e_dn, 0 );
 923
 924         mdb = (struct mdb_info *) be->be_private;
 925
 926         if( cursor ) {
 927                 mdb_cursor_close( cursor );
 928                 cursor = NULL;
 929         }
 930         if ( !txn ) {
 931                 rc = mdb_txn_begin( mdb->mi_dbenv, NULL, 0, &txn );
 932                 if( rc != 0 ) {
 933                         snprintf( text->bv_val, text->bv_len,
 934                                 "txn_begin failed: %s (%d)",
 935                                 mdb_strerror(rc), rc );
 936                         Debug( LDAP_DEBUG_ANY,
 937                                 "=> " LDAP_XSTRING(mdb_tool_entry_modify) ": %s\n",
 938                                  text->bv_val, 0, 0 );
 939                         return NOID;
 940                 }
 941         }
 942
 943         op.o_hdr = &ohdr;
 944         op.o_bd = be;
 945         op.o_tmpmemctx = NULL;
 946         op.o_tmpmfuncs = &ch_mfuncs;
 947
 948         /* id2entry index */
 949         rc = mdb_id2entry_update( &op, txn, NULL, e );
 950         if( rc != 0 ) {
 951                 snprintf( text->bv_val, text->bv_len,
 952                                 "id2entry_update failed: err=%d", rc );
 953                 Debug( LDAP_DEBUG_ANY,
 954                         "=> " LDAP_XSTRING(mdb_tool_entry_modify) ": %s\n",
 955                         text->bv_val, 0, 0 );
 956                 goto done;
 957         }
 958
 959 done:
 960         if( rc == 0 ) {
 961                 rc = mdb_txn_commit( txn );
 962                 if( rc != 0 ) {
 963                         snprintf( text->bv_val, text->bv_len,
 964                                         "txn_commit failed: %s (%d)",
 965                                         mdb_strerror(rc), rc );
 966                         Debug( LDAP_DEBUG_ANY,
 967                                 "=> " LDAP_XSTRING(mdb_tool_entry_modify) ": "
 968                                 "%s\n", text->bv_val, 0, 0 );
 969                         e->e_id = NOID;
 970                 }
 971
 972         } else {
 973                 mdb_txn_abort( txn );
 974                 snprintf( text->bv_val, text->bv_len,
 975                         "txn_aborted! %s (%d)",
 976                         mdb_strerror(rc), rc );
 977                 Debug( LDAP_DEBUG_ANY,
 978                         "=> " LDAP_XSTRING(mdb_tool_entry_modify) ": %s\n",
 979                         text->bv_val, 0, 0 );
 980                 e->e_id = NOID;
 981         }
 982         txn = NULL;
 983         idcursor = NULL;
 984
 985         return e->e_id;
 986 }
 987
 988 static void *
 989 mdb_tool_index_task( void *ctx, void *ptr )
 990 {
 991         int base = *(int *)ptr;
 992
 993         free( ptr );
 994         while ( 1 ) {
 995                 ldap_pvt_thread_mutex_lock( &mdb_tool_index_mutex );
 996                 mdb_tool_index_tcount--;
 997                 if ( !mdb_tool_index_tcount )
 998                         ldap_pvt_thread_cond_signal( &mdb_tool_index_cond_main );
 999                 ldap_pvt_thread_cond_wait( &mdb_tool_index_cond_work,
1000                         &mdb_tool_index_mutex );
1001                 if ( slapd_shutdown ) {
1002                         mdb_tool_index_tcount--;
1003                         if ( !mdb_tool_index_tcount )
1004                                 ldap_pvt_thread_cond_signal( &mdb_tool_index_cond_main );
1005                         ldap_pvt_thread_mutex_unlock( &mdb_tool_index_mutex );
1006                         break;
1007                 }
1008                 ldap_pvt_thread_mutex_unlock( &mdb_tool_index_mutex );
1009                 mdb_tool_index_rec[base].ir_i = mdb_index_recrun( mdb_tool_ix_op,
1010                         mdb_tool_ix_txn,
1011                         mdb_tool_info, mdb_tool_index_rec, mdb_tool_ix_id, base );
1012         }
1013
1014         return NULL;
1015 }
1016
1017 #ifdef MDB_TOOL_IDL_CACHING
1018 static int
1019 mdb_tool_idl_cmp( const void *v1, const void *v2 )
1020 {
1021         const mdb_tool_idl_cache *c1 = v1, *c2 = v2;
1022         int rc;
1023
1024         if (( rc = c1->kstr.bv_len - c2->kstr.bv_len )) return rc;
1025         return memcmp( c1->kstr.bv_val, c2->kstr.bv_val, c1->kstr.bv_len );
1026 }
1027
1028 static int
1029 mdb_tool_idl_flush_one( MDB_cursor *mc, AttrInfo *ai, mdb_tool_idl_cache *ic )
1030 {
1031         mdb_tool_idl_cache_entry *ice;
1032         MDB_val key, data[2];
1033         int i, rc;
1034         ID id, nid;
1035
1036         /* Freshly allocated, ignore it */
1037         if ( !ic->head && ic->count <= MDB_IDL_DB_SIZE ) {
1038                 return 0;
1039         }
1040
1041         key.mv_data = ic->kstr.bv_val;
1042         key.mv_size = ic->kstr.bv_len;
1043
1044         if ( ic->count > MDB_IDL_DB_SIZE ) {
1045                 while ( ic->flags & WAS_FOUND ) {
1046                         rc = mdb_cursor_get( mc, &key, data, MDB_SET );
1047                         if ( rc ) {
1048                                 /* FIXME: find out why this happens */
1049                                 ic->flags = 0;
1050                                 break;
1051                         }
1052                         if ( ic->flags & WAS_RANGE ) {
1053                                 /* Skip lo */
1054                                 rc = mdb_cursor_get( mc, &key, data, MDB_NEXT_DUP );
1055
1056                                 /* Get hi */
1057                                 rc = mdb_cursor_get( mc, &key, data, MDB_NEXT_DUP );
1058
1059                                 /* Store range hi */
1060                                 data[0].mv_data = &ic->last;
1061                                 rc = mdb_cursor_put( mc, &key, data, MDB_CURRENT );
1062                         } else {
1063                                 /* Delete old data, replace with range */
1064                                 ic->first = *(ID *)data[0].mv_data;
1065                                 mdb_cursor_del( mc, MDB_NODUPDATA );
1066                         }
1067                         break;
1068                 }
1069                 if ( !(ic->flags & WAS_RANGE)) {
1070                         /* range, didn't exist before */
1071                         nid = 0;
1072                         data[0].mv_size = sizeof(ID);
1073                         data[0].mv_data = &nid;
1074                         rc = mdb_cursor_put( mc, &key, data, 0 );
1075                         if ( rc == 0 ) {
1076                                 data[0].mv_data = &ic->first;
1077                                 rc = mdb_cursor_put( mc, &key, data, 0 );
1078                                 if ( rc == 0 ) {
1079                                         data[0].mv_data = &ic->last;
1080                                         rc = mdb_cursor_put( mc, &key, data, 0 );
1081                                 }
1082                         }
1083                         if ( rc ) {
1084                                 rc = -1;
1085                         }
1086                 }
1087         } else {
1088                 /* Normal write */
1089                 int n;
1090
1091                 data[0].mv_size = sizeof(ID);
1092                 rc = 0;
1093                 i = ic->offset;
1094                 for ( ice = ic->head, n=0; ice; ice = ice->next, n++ ) {
1095                         int end;
1096                         if ( ice->next ) {
1097                                 end = IDBLOCK;
1098                         } else {
1099                                 end = ic->count & (IDBLOCK-1);
1100                                 if ( !end )
1101                                         end = IDBLOCK;
1102                         }
1103                         data[1].mv_size = end - i;
1104                         data[0].mv_data = &ice->ids[i];
1105                         i = 0;
1106                         rc = mdb_cursor_put( mc, &key, data, MDB_NODUPDATA|MDB_APPEND|MDB_MULTIPLE );
1107                         if ( rc ) {
1108                                 if ( rc == MDB_KEYEXIST ) {
1109                                         rc = 0;
1110                                         continue;
1111                                 }
1112                                 rc = -1;
1113                                 break;
1114                         }
1115                 }
1116                 if ( ic->head ) {
1117                         ic->tail->next = ai->ai_flist;
1118                         ai->ai_flist = ic->head;
1119                 }
1120         }
1121         ic->head = ai->ai_clist;
1122         ai->ai_clist = ic;
1123         return rc;
1124 }
1125
1126 static int
1127 mdb_tool_idl_flush_db( MDB_txn *txn, AttrInfo *ai )
1128 {
1129         MDB_cursor *mc;
1130         Avlnode *root;
1131         int rc;
1132
1133         mdb_cursor_open( txn, ai->ai_dbi, &mc );
1134         root = tavl_end( ai->ai_root, TAVL_DIR_LEFT );
1135         do {
1136                 rc = mdb_tool_idl_flush_one( mc, ai, root->avl_data );
1137                 if ( rc != -1 )
1138                         rc = 0;
1139         } while ((root = tavl_next(root, TAVL_DIR_RIGHT)));
1140         mdb_cursor_close( mc );
1141
1142         return rc;
1143 }
1144
1145 static int
1146 mdb_tool_idl_flush( BackendDB *be, MDB_txn *txn )
1147 {
1148         struct mdb_info *mdb = (struct mdb_info *) be->be_private;
1149         int rc = 0;
1150         unsigned int i, dbi;
1151
1152         for ( i=0; i < mdb->mi_nattrs; i++ ) {
1153                 if ( !mdb->mi_attrs[i]->ai_root ) continue;
1154                 rc = mdb_tool_idl_flush_db( txn, mdb->mi_attrs[i] );
1155                 tavl_free(mdb->mi_attrs[i]->ai_root, NULL);
1156                 mdb->mi_attrs[i]->ai_root = NULL;
1157                 if ( rc )
1158                         break;
1159         }
1160         return rc;
1161 }
1162
1163 int mdb_tool_idl_add(
1164         BackendDB *be,
1165         MDB_cursor *mc,
1166         struct berval *keys,
1167         ID id )
1168 {
1169         MDB_dbi dbi;
1170         mdb_tool_idl_cache *ic, itmp;
1171         mdb_tool_idl_cache_entry *ice;
1172         int i, rc, lcount;
1173         AttrInfo *ai = (AttrInfo *)mc;
1174         mc = ai->ai_cursor;
1175
1176         dbi = ai->ai_dbi;
1177         for (i=0; keys[i].bv_val; i++) {
1178         itmp.kstr = keys[i];
1179         ic = tavl_find( (Avlnode *)ai->ai_root, &itmp, mdb_tool_idl_cmp );
1180
1181         /* No entry yet, create one */
1182         if ( !ic ) {
1183                 MDB_val key, data;
1184                 ID nid;
1185                 int rc;
1186
1187                 if ( ai->ai_clist ) {
1188                         ic = ai->ai_clist;
1189                         ai->ai_clist = ic->head;
1190                 } else {
1191                         ic = ch_malloc( sizeof( mdb_tool_idl_cache ) + itmp.kstr.bv_len + 4 );
1192                 }
1193                 ic->kstr.bv_len = itmp.kstr.bv_len;
1194                 ic->kstr.bv_val = (char *)(ic+1);
1195                 memcpy( ic->kstr.bv_val, itmp.kstr.bv_val, ic->kstr.bv_len );
1196                 ic->head = ic->tail = NULL;
1197                 ic->last = 0;
1198                 ic->count = 0;
1199                 ic->offset = 0;
1200                 ic->flags = 0;
1201                 tavl_insert( (Avlnode **)&ai->ai_root, ic, mdb_tool_idl_cmp,
1202                         avl_dup_error );
1203
1204                 /* load existing key count here */
1205                 key.mv_size = keys[i].bv_len;
1206                 key.mv_data = keys[i].bv_val;
1207                 rc = mdb_cursor_get( mc, &key, &data, MDB_SET );
1208                 if ( rc == 0 ) {
1209                         ic->flags |= WAS_FOUND;
1210                         nid = *(ID *)data.mv_data;
1211                         if ( nid == 0 ) {
1212                                 ic->count = MDB_IDL_DB_SIZE+1;
1213                                 ic->flags |= WAS_RANGE;
1214                         } else {
1215                                 size_t count;
1216
1217                                 mdb_cursor_count( mc, &count );
1218                                 ic->count = count;
1219                                 ic->first = nid;
1220                                 ic->offset = count & (IDBLOCK-1);
1221                         }
1222                 }
1223         }
1224         /* are we a range already? */
1225         if ( ic->count > MDB_IDL_DB_SIZE ) {
1226                 ic->last = id;
1227                 continue;
1228         /* Are we at the limit, and converting to a range? */
1229         } else if ( ic->count == MDB_IDL_DB_SIZE ) {
1230                 if ( ic->head ) {
1231                         ic->tail->next = ai->ai_flist;
1232                         ai->ai_flist = ic->head;
1233                 }
1234                 ic->head = ic->tail = NULL;
1235                 ic->last = id;
1236                 ic->count++;
1237                 continue;
1238         }
1239         /* No free block, create that too */
1240         lcount = ic->count & (IDBLOCK-1);
1241         if ( !ic->tail || lcount == 0) {
1242                 if ( ai->ai_flist ) {
1243                         ice = ai->ai_flist;
1244                         ai->ai_flist = ice->next;
1245                 } else {
1246                         ice = ch_malloc( sizeof( mdb_tool_idl_cache_entry ));
1247                 }
1248                 ice->next = NULL;
1249                 if ( !ic->head ) {
1250                         ic->head = ice;
1251                 } else {
1252                         ic->tail->next = ice;
1253                 }
1254                 ic->tail = ice;
1255                 if ( lcount )
1256                         ice->ids[lcount-1] = 0;
1257                 if ( !ic->count )
1258                         ic->first = id;
1259         }
1260         ice = ic->tail;
1261         if (!lcount || ice->ids[lcount-1] != id)
1262                 ice->ids[lcount] = id;
1263         ic->count++;
1264         }
1265
1266         return 0;
1267 }
1268 #endif /* MDB_TOOL_IDL_CACHING */