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