Diff for /servers/slapd/back-bdb/dbcache.c between versions 1.1 and 1.43.2.4

version 1.1, 2001/10/04 20:29:34 version 1.43.2.4, 2007/11/26 04:08:37
Line 1 Line 1
 /* dbcache.c - manage cache of open databases */  /* dbcache.c - manage cache of open databases */
 /* $OpenLDAP: pkg/ldap/servers/slapd/back-ldbm/dbcache.c,v 1.43 2001/09/16 20:00:53 kurt Exp $ */  /* $OpenLDAP: pkg/ldap/servers/slapd/back-bdb/dbcache.c,v 1.43.2.3 2007/11/21 18:18:32 quanah Exp $ */
 /*  /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
  * Copyright 1998-2001 The OpenLDAP Foundation, All Rights Reserved.   *
  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file   * Copyright 2000-2007 The OpenLDAP Foundation.
    * All rights reserved.
    *
    * Redistribution and use in source and binary forms, with or without
    * modification, are permitted only as authorized by the OpenLDAP
    * Public License.
    *
    * A copy of this license is available in the file LICENSE in the
    * top-level directory of the distribution or, alternatively, at
    * <http://www.OpenLDAP.org/license.html>.
  */   */
   
 #include "portable.h"  #include "portable.h"
Line 17 Line 26
   
 #include "slap.h"  #include "slap.h"
 #include "back-bdb.h"  #include "back-bdb.h"
   #include "lutil_hash.h"
   
   #ifdef BDB_INDEX_USE_HASH
   /* Pass-thru hash function. Since the indexer is already giving us hash
    * values as keys, we don't need BDB to re-hash them.
    */
   static u_int32_t
   bdb_db_hash(
           DB *db,
           const void *bytes,
           u_int32_t length
   )
   {
           u_int32_t ret = 0;
           unsigned char *dst = (unsigned char *)&ret;
           const unsigned char *src = (const unsigned char *)bytes;
   
           if ( length > sizeof(u_int32_t) )
                   length = sizeof(u_int32_t);
   
           while ( length ) {
                   *dst++ = *src++;
                   length--;
           }
           return ret;
   }
   #define BDB_INDEXTYPE   DB_HASH
   #else
   #define BDB_INDEXTYPE   DB_BTREE
   #endif
   
 int  int
 bdb_db_cache(  bdb_db_cache(
     Backend     *be,          Backend *be,
     const char *name,          struct berval *name,
         DB *db )          DB **dbout )
 {  {
         return -1;          int i, flags;
           int rc;
           struct bdb_info *bdb = (struct bdb_info *) be->be_private;
           struct bdb_db_info *db;
           char *file;
   
           *dbout = NULL;
   
           for( i=BDB_NDB; i < bdb->bi_ndatabases; i++ ) {
                   if( !ber_bvcmp( &bdb->bi_databases[i]->bdi_name, name) ) {
                           *dbout = bdb->bi_databases[i]->bdi_db;
                           return 0;
                   }
           }
   
           ldap_pvt_thread_mutex_lock( &bdb->bi_database_mutex );
   
           /* check again! may have been added by another thread */
           for( i=BDB_NDB; i < bdb->bi_ndatabases; i++ ) {
                   if( !ber_bvcmp( &bdb->bi_databases[i]->bdi_name, name) ) {
                           *dbout = bdb->bi_databases[i]->bdi_db;
                           ldap_pvt_thread_mutex_unlock( &bdb->bi_database_mutex );
                           return 0;
                   }
           }
   
           if( i >= BDB_INDICES ) {
                   ldap_pvt_thread_mutex_unlock( &bdb->bi_database_mutex );
                   return -1;
           }
   
           db = (struct bdb_db_info *) ch_calloc(1, sizeof(struct bdb_db_info));
   
           ber_dupbv( &db->bdi_name, name );
   
           rc = db_create( &db->bdi_db, bdb->bi_dbenv, 0 );
           if( rc != 0 ) {
                   Debug( LDAP_DEBUG_ANY,
                           "bdb_db_cache: db_create(%s) failed: %s (%d)\n",
                           bdb->bi_dbenv_home, db_strerror(rc), rc );
                   ldap_pvt_thread_mutex_unlock( &bdb->bi_database_mutex );
                   return rc;
           }
   
           rc = db->bdi_db->set_pagesize( db->bdi_db, BDB_PAGESIZE );
   #ifdef BDB_INDEX_USE_HASH
           rc = db->bdi_db->set_h_hash( db->bdi_db, bdb_db_hash );
   #endif
           rc = db->bdi_db->set_flags( db->bdi_db, DB_DUP | DB_DUPSORT );
   
           file = ch_malloc( db->bdi_name.bv_len + sizeof(BDB_SUFFIX) );
           strcpy( file, db->bdi_name.bv_val );
           strcpy( file+db->bdi_name.bv_len, BDB_SUFFIX );
   
   #ifdef HAVE_EBCDIC
           __atoe( file );
   #endif
           flags = DB_CREATE | DB_THREAD;
   #ifdef DB_AUTO_COMMIT
           if ( !( slapMode & SLAP_TOOL_QUICK ))
                   flags |= DB_AUTO_COMMIT;
   #endif
           /* Cannot Truncate when Transactions are in use */
           if ( (slapMode & (SLAP_TOOL_QUICK|SLAP_TRUNCATE_MODE)) ==
                   (SLAP_TOOL_QUICK|SLAP_TRUNCATE_MODE))
                           flags |= DB_TRUNCATE;
   
           rc = DB_OPEN( db->bdi_db,
                   file, NULL /* name */,
                   BDB_INDEXTYPE, bdb->bi_db_opflags | flags, bdb->bi_dbenv_mode );
   
           ch_free( file );
   
           if( rc != 0 ) {
                   Debug( LDAP_DEBUG_ANY,
                           "bdb_db_cache: db_open(%s) failed: %s (%d)\n",
                           name->bv_val, db_strerror(rc), rc );
                   ldap_pvt_thread_mutex_unlock( &bdb->bi_database_mutex );
                   return rc;
           }
   
           bdb->bi_databases[i] = db;
           bdb->bi_ndatabases = i+1;
   
           *dbout = db->bdi_db;
   
           ldap_pvt_thread_mutex_unlock( &bdb->bi_database_mutex );
           return 0;
 }  }

Removed from v.1.1  
changed lines
  Added in v.1.43.2.4


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