1 /* dbcache.c - manage cache of open databases */
4 * Copyright 1998-2003 The OpenLDAP Foundation, All Rights Reserved.
5 * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
13 #include <ac/socket.h>
14 #include <ac/string.h>
20 #include "lutil_hash.h"
22 /* Pass-thru hash function. Since the indexer is already giving us hash
23 * values as keys, we don't need BDB to re-hash them.
34 if ( length > sizeof(u_int32_t) )
35 length = sizeof(u_int32_t);
37 for( i = 0; i < length; i++ )
38 ret = (ret << 8) + ((const unsigned char *)bytes)[i];
52 struct bdb_info *bdb = (struct bdb_info *) be->be_private;
53 struct bdb_db_info *db;
61 for( i=BDB_NDB; i < bdb->bi_ndatabases; i++ ) {
62 if( !strcmp( bdb->bi_databases[i]->bdi_name, name) ) {
63 *dbout = bdb->bi_databases[i]->bdi_db;
68 lockobj.data = "bdb_db_cache";
69 lockobj.size = sizeof("bdb_db_cache");
72 locker = TXN_ID( tid );
74 #ifdef BDB_REUSE_LOCKERS
75 #define op NULL /* implicit arg in LOCK_ID */
77 rc = LOCK_ID( bdb->bi_dbenv, &locker );
80 rc = LOCK_GET( bdb->bi_dbenv, locker, 0, &lockobj,
81 DB_LOCK_WRITE, &lock );
84 /* check again! may have been added by another thread */
85 for( i=BDB_NDB; i < bdb->bi_ndatabases; i++ ) {
86 if( !strcmp( bdb->bi_databases[i]->bdi_name, name) ) {
87 *dbout = bdb->bi_databases[i]->bdi_db;
88 LOCK_PUT( bdb->bi_dbenv, &lock);
93 if( i >= BDB_INDICES ) {
94 LOCK_PUT( bdb->bi_dbenv, &lock);
98 db = (struct bdb_db_info *) ch_calloc(1, sizeof(struct bdb_db_info));
100 db->bdi_name = ch_strdup( name );
102 rc = db_create( &db->bdi_db, bdb->bi_dbenv, 0 );
105 LDAP_LOG ( CACHE, ERR,
106 "bdb_db_cache: db_create(%s) failed: %s (%d)\n",
107 bdb->bi_dbenv_home, db_strerror(rc), rc );
109 Debug( LDAP_DEBUG_ANY,
110 "bdb_db_cache: db_create(%s) failed: %s (%d)\n",
111 bdb->bi_dbenv_home, db_strerror(rc), rc );
113 LOCK_PUT( bdb->bi_dbenv, &lock);
117 rc = db->bdi_db->set_pagesize( db->bdi_db, BDB_PAGESIZE );
118 rc = db->bdi_db->set_h_hash( db->bdi_db, bdb_db_hash );
119 rc = db->bdi_db->set_flags( db->bdi_db, DB_DUP | DB_DUPSORT );
120 rc = db->bdi_db->set_dup_compare( db->bdi_db, bdb_bt_compare );
122 file = ch_malloc( strlen( name ) + sizeof(BDB_SUFFIX) );
123 sprintf( file, "%s" BDB_SUFFIX, name );
128 flags = bdb->bi_db_opflags | DB_CREATE | DB_THREAD;
129 if ( !tid ) flags |= DB_AUTO_COMMIT;
130 rc = DB_OPEN( db->bdi_db, tid,
131 file, NULL /* name */,
133 bdb->bi_dbenv_mode );
139 LDAP_LOG ( CACHE, ERR,
140 "bdb_db_cache: db_open(%s) failed: %s (%d)\n",
141 name, db_strerror(rc), rc );
143 Debug( LDAP_DEBUG_ANY,
144 "bdb_db_cache: db_open(%s) failed: %s (%d)\n",
145 name, db_strerror(rc), rc );
147 LOCK_PUT( bdb->bi_dbenv, &lock);
151 bdb->bi_databases[i] = db;
152 bdb->bi_ndatabases = i+1;
156 LOCK_PUT( bdb->bi_dbenv, &lock );