X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=servers%2Fslapd%2Fback-bdb%2Fdbcache.c;h=23d964deaa3bd45446d27ffc150fdc4c4a1c3d86;hb=47c6701a2293fec249cdb84f69b37addfb4b36fc;hp=1837ed4e1b4d85e0c4e486fff00cf50eef7cd0ca;hpb=5160da05e533ead252525894414dfead55300ff8;p=openldap

diff --git a/servers/slapd/back-bdb/dbcache.c b/servers/slapd/back-bdb/dbcache.c
index 1837ed4e1b..23d964deaa 100644
--- a/servers/slapd/back-bdb/dbcache.c
+++ b/servers/slapd/back-bdb/dbcache.c
@@ -1,8 +1,17 @@
 /* dbcache.c - manage cache of open databases */
 /* $OpenLDAP$ */
-/*
- * Copyright 1998-2001 The OpenLDAP Foundation, All Rights Reserved.
- * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 2000-2004 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"
@@ -17,12 +26,132 @@
 
 #include "slap.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
 bdb_db_cache(
-    Backend	*be,
-    const char *name,
-	DB *db )
+	Backend	*be,
+	const char *name,
+	DB **dbout )
 {
-	return -1;
+	int i;
+	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( !strcmp( 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( !strcmp( 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));
+
+	db->bdi_name = ch_strdup( name );
+
+	rc = db_create( &db->bdi_db, bdb->bi_dbenv, 0 );
+	if( rc != 0 ) {
+#ifdef NEW_LOGGING
+		LDAP_LOG ( CACHE, ERR, 
+			"bdb_db_cache: db_create(%s) failed: %s (%d)\n", 
+			bdb->bi_dbenv_home, db_strerror(rc), rc );
+#else
+		Debug( LDAP_DEBUG_ANY,
+			"bdb_db_cache: db_create(%s) failed: %s (%d)\n",
+			bdb->bi_dbenv_home, db_strerror(rc), rc );
+#endif
+		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 );
+	rc = db->bdi_db->set_dup_compare( db->bdi_db, bdb_bt_compare );
+
+	file = ch_malloc( strlen( name ) + sizeof(BDB_SUFFIX) );
+	sprintf( file, "%s" BDB_SUFFIX, name );
+
+#ifdef HAVE_EBCDIC
+	__atoe( file );
+#endif
+	rc = DB_OPEN( db->bdi_db,
+		file, NULL /* name */,
+		BDB_INDEXTYPE, bdb->bi_db_opflags | DB_CREATE | DB_THREAD,
+		bdb->bi_dbenv_mode );
+
+	ch_free( file );
+
+	if( rc != 0 ) {
+#ifdef NEW_LOGGING
+		LDAP_LOG ( CACHE, ERR, 
+			"bdb_db_cache: db_open(%s) failed: %s (%d)\n", 
+			name, db_strerror(rc), rc );
+#else
+		Debug( LDAP_DEBUG_ANY,
+			"bdb_db_cache: db_open(%s) failed: %s (%d)\n",
+			name, db_strerror(rc), rc );
+#endif
+		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;
 }