git.sur5r.net Git - openldap/blob - servers/slapd/back-ldbm/dn2id.c

   1 /* dn2id.c - routines to deal with the dn2id index */
   2 /* $OpenLDAP$ */
   3 /*
   4  * Copyright 1998-2002 The OpenLDAP Foundation, All Rights Reserved.
   5  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   6  */
   7
   8 #include "portable.h"
   9
  10 #include <stdio.h>
  11
  12 #include <ac/string.h>
  13 #include <ac/socket.h>
  14
  15 #include "slap.h"
  16 #include "back-ldbm.h"
  17 #include "proto-back-ldbm.h"
  18
  19 int
  20 dn2id_add(
  21     Backend     *be,
  22     struct berval *dn,
  23     ID          id
  24 )
  25 {
  26         int             rc, flags;
  27         DBCache *db;
  28         Datum           key, data;
  29         char            *buf, *ptr, *pdn;
  30
  31 #ifdef NEW_LOGGING
  32         LDAP_LOG(( "backend", LDAP_LEVEL_ENTRY,
  33                    "dn2id_add: (%s):%ld\n", dn->bv_val, id ));
  34 #else
  35         Debug( LDAP_DEBUG_TRACE, "=> dn2id_add( \"%s\", %ld )\n", dn->bv_val, id, 0 );
  36 #endif
  37
  38         assert( id != NOID );
  39
  40         if ( (db = ldbm_cache_open( be, "dn2id", LDBM_SUFFIX, LDBM_WRCREAT ))
  41             == NULL ) {
  42 #ifdef NEW_LOGGING
  43                 LDAP_LOG(( "backend", LDAP_LEVEL_ERR,
  44                            "dn2id_add: couldn't open/create dn2id%s\n", LDBM_SUFFIX ));
  45 #else
  46                 Debug( LDAP_DEBUG_ANY, "Could not open/create dn2id%s\n",
  47                     LDBM_SUFFIX, 0, 0 );
  48 #endif
  49
  50                 return( -1 );
  51         }
  52
  53         ldbm_datum_init( key );
  54         key.dsize = dn->bv_len + 2;
  55         buf = ch_malloc( key.dsize );
  56         key.dptr = buf;
  57         buf[0] = DN_BASE_PREFIX;
  58         ptr = buf + 1;
  59         strcpy( ptr, dn->bv_val );
  60
  61         ldbm_datum_init( data );
  62         data.dptr = (char *) &id;
  63         data.dsize = sizeof(ID);
  64
  65         flags = LDBM_INSERT;
  66         rc = ldbm_cache_store( db, key, data, flags );
  67
  68         if ( rc != -1 && !be_issuffix( be, ptr )) {
  69                 buf[0] = DN_SUBTREE_PREFIX;
  70                 ldap_pvt_thread_mutex_lock( &db->dbc_write_mutex );
  71                 rc = idl_insert_key( be, db, key, id );
  72                 ldap_pvt_thread_mutex_unlock( &db->dbc_write_mutex );
  73         }
  74
  75         if ( rc != -1 ) {
  76                 pdn = dn_parent( be, ptr );
  77
  78                 if( pdn != NULL ) {
  79                         pdn[-1] = DN_ONE_PREFIX;
  80                         key.dsize -= pdn - ptr;
  81                         key.dptr = pdn - 1;
  82                         ldap_pvt_thread_mutex_lock( &db->dbc_write_mutex );
  83                         rc = idl_insert_key( be, db, key, id );
  84                         ldap_pvt_thread_mutex_unlock( &db->dbc_write_mutex );
  85                 }
  86         }
  87
  88         while ( rc != -1 && pdn != NULL ) {
  89                 if ( be_issuffix( be, pdn ))
  90                         break;
  91
  92                 pdn[-1] = DN_SUBTREE_PREFIX;
  93
  94                 ldap_pvt_thread_mutex_lock( &db->dbc_write_mutex );
  95                 rc = idl_insert_key( be, db, key, id );
  96                 ldap_pvt_thread_mutex_unlock( &db->dbc_write_mutex );
  97
  98                 if( rc != 0 ) break;
  99                 ptr = pdn;
 100                 pdn = dn_parent( be, pdn );
 101                 key.dsize -= pdn - ptr;
 102                 key.dptr = pdn - 1;
 103         }
 104
 105         free( buf );
 106         ldbm_cache_close( be, db );
 107
 108 #ifdef NEW_LOGGING
 109         LDAP_LOG(( "backend", LDAP_LEVEL_ENTRY,
 110                    "dn2id_add: return %d\n", rc ));
 111 #else
 112         Debug( LDAP_DEBUG_TRACE, "<= dn2id_add %d\n", rc, 0, 0 );
 113 #endif
 114
 115         return( rc );
 116 }
 117
 118 int
 119 dn2id(
 120     Backend     *be,
 121     struct berval *dn,
 122     ID          *idp
 123 )
 124 {
 125         struct ldbminfo *li = (struct ldbminfo *) be->be_private;
 126         DBCache *db;
 127         Datum           key, data;
 128
 129 #ifdef NEW_LOGGING
 130         LDAP_LOG(( "backend", LDAP_LEVEL_ENTRY,
 131                    "dn2id: (%s)\n", dn->bv_val ));
 132 #else
 133         Debug( LDAP_DEBUG_TRACE, "=> dn2id( \"%s\" )\n", dn->bv_val, 0, 0 );
 134 #endif
 135
 136         assert( idp );
 137
 138         /* first check the cache */
 139         if ( (*idp = cache_find_entry_ndn2id( be, &li->li_cache, dn )) != NOID ) {
 140 #ifdef NEW_LOGGING
 141                 LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL1,
 142                            "dn2id: (%s)%ld in cache.\n", dn, *idp ));
 143 #else
 144                 Debug( LDAP_DEBUG_TRACE, "<= dn2id %ld (in cache)\n", *idp,
 145                         0, 0 );
 146 #endif
 147
 148                 return( 0 );
 149         }
 150
 151         if ( (db = ldbm_cache_open( be, "dn2id", LDBM_SUFFIX, LDBM_WRCREAT ))
 152                 == NULL ) {
 153 #ifdef NEW_LOGGING
 154                 LDAP_LOG(( "backend", LDAP_LEVEL_ERR,
 155                            "dn2id: couldn't open dn2id%s\n", LDBM_SUFFIX ));
 156 #else
 157                 Debug( LDAP_DEBUG_ANY, "<= dn2id could not open dn2id%s\n",
 158                         LDBM_SUFFIX, 0, 0 );
 159 #endif
 160                 /*
 161                  * return code !0 if ldbm cache open failed;
 162                  * callers should handle this
 163                  */
 164                 *idp = NOID;
 165                 return( -1 );
 166         }
 167
 168         ldbm_datum_init( key );
 169
 170         key.dsize = dn->bv_len + 2;
 171         key.dptr = ch_malloc( key.dsize );
 172         sprintf( key.dptr, "%c%s", DN_BASE_PREFIX, dn->bv_val );
 173
 174         data = ldbm_cache_fetch( db, key );
 175
 176         ldbm_cache_close( be, db );
 177
 178         free( key.dptr );
 179
 180         if ( data.dptr == NULL ) {
 181 #ifdef NEW_LOGGING
 182                 LDAP_LOG(( "backend", LDAP_LEVEL_INFO,
 183                            "dn2id: (%s) NOID\n", dn ));
 184 #else
 185                 Debug( LDAP_DEBUG_TRACE, "<= dn2id NOID\n", 0, 0, 0 );
 186 #endif
 187
 188                 *idp = NOID;
 189                 return( 0 );
 190         }
 191
 192         AC_MEMCPY( (char *) idp, data.dptr, sizeof(ID) );
 193
 194         assert( *idp != NOID );
 195
 196         ldbm_datum_free( db->dbc_db, data );
 197
 198 #ifdef NEW_LOGGING
 199         LDAP_LOG(( "backend", LDAP_LEVEL_ENTRY,
 200                    "dn2id: %ld\n", *idp ));
 201 #else
 202         Debug( LDAP_DEBUG_TRACE, "<= dn2id %ld\n", *idp, 0, 0 );
 203 #endif
 204
 205         return( 0 );
 206 }
 207
 208 int
 209 dn2idl(
 210     Backend     *be,
 211     struct berval       *dn,
 212     int         prefix,
 213     ID_BLOCK    **idlp
 214 )
 215 {
 216         DBCache *db;
 217         Datum           key;
 218
 219 #ifdef NEW_LOGGING
 220         LDAP_LOG(( "backend", LDAP_LEVEL_ENTRY,
 221                    "dn2idl: \"%c%s\"\n", prefix, dn->bv_val ));
 222 #else
 223         Debug( LDAP_DEBUG_TRACE, "=> dn2idl( \"%c%s\" )\n", prefix, dn->bv_val, 0 );
 224 #endif
 225
 226         assert( idlp != NULL );
 227         *idlp = NULL;
 228
 229         if ( prefix == DN_SUBTREE_PREFIX && be_issuffix(be, dn->bv_val) ) {
 230                 *idlp = idl_allids( be );
 231                 return 0;
 232         }
 233
 234         if ( (db = ldbm_cache_open( be, "dn2id", LDBM_SUFFIX, LDBM_WRCREAT ))
 235                 == NULL ) {
 236 #ifdef NEW_LOGGING
 237                 LDAP_LOG(( "backend", LDAP_LEVEL_ERR,
 238                            "dn2idl: could not open dn2id%s\n", LDBM_SUFFIX ));
 239 #else
 240                 Debug( LDAP_DEBUG_ANY, "<= dn2idl could not open dn2id%s\n",
 241                         LDBM_SUFFIX, 0, 0 );
 242 #endif
 243
 244                 return -1;
 245         }
 246
 247         ldbm_datum_init( key );
 248
 249         key.dsize = dn->bv_len + 2;
 250         key.dptr = ch_malloc( key.dsize );
 251         sprintf( key.dptr, "%c%s", prefix, dn->bv_val );
 252
 253         *idlp = idl_fetch( be, db, key );
 254
 255         ldbm_cache_close( be, db );
 256
 257         free( key.dptr );
 258
 259         return( 0 );
 260 }
 261
 262
 263 int
 264 dn2id_delete(
 265     Backend     *be,
 266     struct berval *dn,
 267         ID id
 268 )
 269 {
 270         DBCache *db;
 271         Datum           key;
 272         int             rc;
 273         char            *buf, *ptr, *pdn;
 274
 275 #ifdef NEW_LOGGING
 276         LDAP_LOG(( "backend", LDAP_LEVEL_ENTRY,
 277                    "dn2id_delete: (%s)%ld\n", dn->bv_val, id ));
 278 #else
 279         Debug( LDAP_DEBUG_TRACE, "=> dn2id_delete( \"%s\", %ld )\n", dn->bv_val, id, 0 );
 280 #endif
 281
 282
 283         assert( id != NOID );
 284
 285         if ( (db = ldbm_cache_open( be, "dn2id", LDBM_SUFFIX, LDBM_WRCREAT ))
 286             == NULL ) {
 287 #ifdef NEW_LOGGING
 288                 LDAP_LOG(( "backend", LDAP_LEVEL_ERR,
 289                            "dn2id_delete: couldn't open db2id%s\n", LDBM_SUFFIX ));
 290 #else
 291                 Debug( LDAP_DEBUG_ANY,
 292                     "<= dn2id_delete could not open dn2id%s\n", LDBM_SUFFIX,
 293                     0, 0 );
 294 #endif
 295
 296                 return( -1 );
 297         }
 298
 299         ldbm_datum_init( key );
 300         key.dsize = dn->bv_len + 2;
 301         buf = ch_malloc( key.dsize );
 302         key.dptr = buf;
 303         buf[0] = DN_BASE_PREFIX;
 304         ptr = buf + 1;
 305         strcpy( ptr, dn->bv_val );
 306
 307         rc = ldbm_cache_delete( db, key );
 308
 309         if( !be_issuffix( be, ptr )) {
 310                 buf[0] = DN_SUBTREE_PREFIX;
 311                 ldap_pvt_thread_mutex_lock( &db->dbc_write_mutex );
 312                 (void) idl_delete_key( be, db, key, id );
 313                 ldap_pvt_thread_mutex_unlock( &db->dbc_write_mutex );
 314         }
 315
 316         pdn = dn_parent( be, ptr );
 317
 318         if( pdn != NULL ) {
 319                 pdn[-1] = DN_ONE_PREFIX;
 320                 key.dsize -= pdn - ptr;
 321                 key.dptr = pdn - 1;
 322
 323                 ldap_pvt_thread_mutex_lock( &db->dbc_write_mutex );
 324                 (void) idl_delete_key( be, db, key, id );
 325                 ldap_pvt_thread_mutex_unlock( &db->dbc_write_mutex );
 326         }
 327
 328         while ( pdn != NULL ) {
 329                 if ( be_issuffix( be, pdn ))
 330                         break;
 331
 332                 pdn[-1] = DN_SUBTREE_PREFIX;
 333
 334                 ldap_pvt_thread_mutex_lock( &db->dbc_write_mutex );
 335                 (void) idl_delete_key( be, db, key, id );
 336                 ldap_pvt_thread_mutex_unlock( &db->dbc_write_mutex );
 337
 338                 ptr = pdn;
 339                 pdn = dn_parent( be, pdn );
 340                 key.dsize -= pdn - ptr;
 341                 key.dptr = pdn - 1;
 342         }
 343
 344         free( buf );
 345
 346         ldbm_cache_close( be, db );
 347
 348 #ifdef NEW_LOGGING
 349         LDAP_LOG(( "backend", LDAP_LEVEL_ENTRY,
 350                    "dn2id_delete: return %d\n", rc ));
 351 #else
 352         Debug( LDAP_DEBUG_TRACE, "<= dn2id_delete %d\n", rc, 0, 0 );
 353 #endif
 354
 355         return( rc );
 356 }
 357
 358 /*
 359  * dn2entry - look up dn in the cache/indexes and return the corresponding
 360  * entry.
 361  */
 362
 363 Entry *
 364 dn2entry_rw(
 365     Backend     *be,
 366     struct berval *dn,
 367     Entry       **matched,
 368     int         rw
 369 )
 370 {
 371         ID              id;
 372         Entry           *e = NULL;
 373         struct berval   pdn;
 374
 375 #ifdef NEW_LOGGING
 376         LDAP_LOG(( "backend", LDAP_LEVEL_ENTRY,
 377                    "dn2entry_rw: %s entry %s\n", rw ? "w" : "r",
 378                    dn->bv_val ));
 379 #else
 380         Debug(LDAP_DEBUG_TRACE, "dn2entry_%s: dn: \"%s\"\n",
 381                 rw ? "w" : "r", dn->bv_val, 0);
 382 #endif
 383
 384
 385         if( matched != NULL ) {
 386                 /* caller cares about match */
 387                 *matched = NULL;
 388         }
 389
 390         if ( dn2id( be, dn, &id ) ) {
 391                 /* something bad happened to ldbm cache */
 392                 return( NULL );
 393
 394         } else if ( id != NOID ) {
 395                 /* try to return the entry */
 396                 if ((e = id2entry_rw( be, id, rw )) != NULL ) {
 397                         return( e );
 398                 }
 399
 400 #ifdef NEW_LOGGING
 401                 LDAP_LOG(( "backend", LDAP_LEVEL_ERR,
 402                            "dn2entry_rw: no entry for valid id (%ld), dn (%s)\n",
 403                            id, dn->bv_val ));
 404 #else
 405                 Debug(LDAP_DEBUG_ANY,
 406                         "dn2entry_%s: no entry for valid id (%ld), dn \"%s\"\n",
 407                         rw ? "w" : "r", id, dn->bv_val);
 408 #endif
 409
 410                 /* must have been deleted from underneath us */
 411                 /* treat as if NOID was found */
 412         }
 413
 414         /* caller doesn't care about match */
 415         if( matched == NULL ) return NULL;
 416
 417         /* entry does not exist - see how much of the dn does exist */
 418         /* dn_parent checks returns NULL if dn is suffix */
 419         if ( (pdn.bv_val = dn_parent( be, dn->bv_val )) != NULL && *pdn.bv_val ) {
 420                 pdn.bv_len = dn->bv_len - (pdn.bv_val - dn->bv_val);
 421                 /* get entry with reader lock */
 422                 if ( (e = dn2entry_r( be, &pdn, matched )) != NULL ) {
 423                         *matched = e;
 424                 }
 425         }
 426
 427         return NULL;
 428 }
 429