1 /* dbcache.c - manage cache of open databases */
3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
5 * Copyright 2000-2005 The OpenLDAP Foundation.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted only as authorized by the OpenLDAP
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>.
22 #include <ac/socket.h>
23 #include <ac/string.h>
29 #include "lutil_hash.h"
31 #ifdef BDB_INDEX_USE_HASH
32 /* Pass-thru hash function. Since the indexer is already giving us hash
33 * values as keys, we don't need BDB to re-hash them.
43 unsigned char *dst = (unsigned char *)&ret;
44 const unsigned char *src = (const unsigned char *)bytes;
46 if ( length > sizeof(u_int32_t) )
47 length = sizeof(u_int32_t);
55 #define BDB_INDEXTYPE DB_HASH
57 #define BDB_INDEXTYPE DB_BTREE
68 struct bdb_info *bdb = (struct bdb_info *) be->be_private;
69 struct bdb_db_info *db;
74 for( i=BDB_NDB; i < bdb->bi_ndatabases; i++ ) {
75 if( !strcmp( bdb->bi_databases[i]->bdi_name, name) ) {
76 *dbout = bdb->bi_databases[i]->bdi_db;
81 ldap_pvt_thread_mutex_lock( &bdb->bi_database_mutex );
83 /* check again! may have been added by another thread */
84 for( i=BDB_NDB; i < bdb->bi_ndatabases; i++ ) {
85 if( !strcmp( bdb->bi_databases[i]->bdi_name, name) ) {
86 *dbout = bdb->bi_databases[i]->bdi_db;
87 ldap_pvt_thread_mutex_unlock( &bdb->bi_database_mutex );
92 if( i >= BDB_INDICES ) {
93 ldap_pvt_thread_mutex_unlock( &bdb->bi_database_mutex );
97 db = (struct bdb_db_info *) ch_calloc(1, sizeof(struct bdb_db_info));
99 db->bdi_name = ch_strdup( name );
101 rc = db_create( &db->bdi_db, bdb->bi_dbenv, 0 );
103 Debug( LDAP_DEBUG_ANY,
104 "bdb_db_cache: db_create(%s) failed: %s (%d)\n",
105 bdb->bi_dbenv_home, db_strerror(rc), rc );
106 ldap_pvt_thread_mutex_unlock( &bdb->bi_database_mutex );
110 rc = db->bdi_db->set_pagesize( db->bdi_db, BDB_PAGESIZE );
111 #ifdef BDB_INDEX_USE_HASH
112 rc = db->bdi_db->set_h_hash( db->bdi_db, bdb_db_hash );
114 rc = db->bdi_db->set_flags( db->bdi_db, DB_DUP | DB_DUPSORT );
116 file = ch_malloc( strlen( name ) + sizeof(BDB_SUFFIX) );
117 sprintf( file, "%s" BDB_SUFFIX, name );
122 flags = DB_CREATE | DB_THREAD;
123 #ifdef DB_AUTO_COMMIT
124 if ( !( slapMode & SLAP_TOOL_QUICK ))
125 flags |= DB_AUTO_COMMIT;
127 /* Cannot Truncate when Transactions are in use */
128 if ( (slapMode & (SLAP_TOOL_QUICK|SLAP_TRUNCATE_MODE)) ==
129 (SLAP_TOOL_QUICK|SLAP_TRUNCATE_MODE))
130 flags |= DB_TRUNCATE;
132 rc = DB_OPEN( db->bdi_db,
133 file, NULL /* name */,
134 BDB_INDEXTYPE, bdb->bi_db_opflags | flags, bdb->bi_dbenv_mode );
139 Debug( LDAP_DEBUG_ANY,
140 "bdb_db_cache: db_open(%s) failed: %s (%d)\n",
141 name, db_strerror(rc), rc );
142 ldap_pvt_thread_mutex_unlock( &bdb->bi_database_mutex );
146 bdb->bi_databases[i] = db;
147 bdb->bi_ndatabases = i+1;
151 ldap_pvt_thread_mutex_unlock( &bdb->bi_database_mutex );