init.c 5.46 KB
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/* init.c - initialize ldbm backend */
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/* $OpenLDAP$ */
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Notices    
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/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
 *
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 * Copyright 1998-2005 The OpenLDAP Foundation.
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 * 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>.
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 */
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#include "portable.h"

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#include <stdio.h>
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#include <ac/string.h>
#include <ac/socket.h>

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#include "slap.h"
#include "back-ldbm.h"

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int
ldbm_back_initialize(
    BackendInfo	*bi
)
{
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	static char *controls[] = {
		LDAP_CONTROL_MANAGEDSAIT,
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#ifdef LDAP_CONTROL_X_PERMISSIVE_MODIFY
		LDAP_CONTROL_X_PERMISSIVE_MODIFY,
#endif
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		NULL
	};

	bi->bi_controls = controls;

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	bi->bi_flags |= 
		SLAP_BFLAG_INCREMENT |
#ifdef LDBM_SUBENTRIES
		SLAP_BFLAG_SUBENTRIES |
#endif
		SLAP_BFLAG_ALIASES |
		SLAP_BFLAG_REFERRALS;

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	bi->bi_open = ldbm_back_open;
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	bi->bi_config = NULL;
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	bi->bi_close = ldbm_back_close;
	bi->bi_destroy = ldbm_back_destroy;

	bi->bi_db_init = ldbm_back_db_init;
	bi->bi_db_config = ldbm_back_db_config;
	bi->bi_db_open = ldbm_back_db_open;
	bi->bi_db_close = ldbm_back_db_close;
	bi->bi_db_destroy = ldbm_back_db_destroy;

	bi->bi_op_bind = ldbm_back_bind;
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	bi->bi_op_unbind = 0;
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	bi->bi_op_search = ldbm_back_search;
	bi->bi_op_compare = ldbm_back_compare;
	bi->bi_op_modify = ldbm_back_modify;
	bi->bi_op_modrdn = ldbm_back_modrdn;
	bi->bi_op_add = ldbm_back_add;
	bi->bi_op_delete = ldbm_back_delete;
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	bi->bi_op_abandon = 0;
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	bi->bi_extended = ldbm_back_extended;

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	bi->bi_entry_release_rw = ldbm_back_entry_release_rw;
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	bi->bi_entry_get_rw = ldbm_back_entry_get;
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	bi->bi_chk_referrals = ldbm_back_referrals;
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	bi->bi_operational = ldbm_back_operational;
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	bi->bi_has_subordinates = ldbm_back_hasSubordinates;
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	/*
	 * hooks for slap tools
	 */
	bi->bi_tool_entry_open = ldbm_tool_entry_open;
	bi->bi_tool_entry_close = ldbm_tool_entry_close;
	bi->bi_tool_entry_first = ldbm_tool_entry_first;
	bi->bi_tool_entry_next = ldbm_tool_entry_next;
	bi->bi_tool_entry_get = ldbm_tool_entry_get;
	bi->bi_tool_entry_put = ldbm_tool_entry_put;
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	bi->bi_tool_entry_reindex = ldbm_tool_entry_reindex;
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	bi->bi_tool_sync = ldbm_tool_sync;

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	bi->bi_tool_dn2id_get = 0;
	bi->bi_tool_id2entry_get = 0;
	bi->bi_tool_entry_modify = 0;

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	bi->bi_connection_init = 0;
	bi->bi_connection_destroy = 0;

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	return 0;
}

int
ldbm_back_destroy(
    BackendInfo	*bi
)
{
	return 0;
}

int
ldbm_back_open(
    BackendInfo	*bi
)
{
	int rc;

	/* initialize the underlying database system */
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	rc = ldbm_initialize( NULL );
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	return rc;
}

int
ldbm_back_close(
    BackendInfo	*bi
)
{
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	/* terminate the underlying database system */
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	ldbm_shutdown();
	return 0;
}

int
ldbm_back_db_init(
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    Backend	*be
)
{
	struct ldbminfo	*li;

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	/* allocate backend-database-specific stuff */
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	li = (struct ldbminfo *) ch_calloc( 1, sizeof(struct ldbminfo) );

	/* arrange to read nextid later (on first request for it) */
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	li->li_nextid = NOID;
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	/* default cache size */
	li->li_cache.c_maxsize = DEFAULT_CACHE_SIZE;

	/* default database cache size */
	li->li_dbcachesize = DEFAULT_DBCACHE_SIZE;

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	/* default db mode is with locking */ 
	li->li_dblocking = 1;

	/* default db mode is with write synchronization */ 
	li->li_dbwritesync = 1;
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	/* default file creation mode */
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	li->li_mode = SLAPD_DEFAULT_DB_MODE;
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	/* default database directory */
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	li->li_directory = ch_strdup( SLAPD_DEFAULT_DB_DIR );
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	/* DB_ENV environment pointer for DB3 */
	li->li_dbenv = 0;

	/* envdirok is turned on by ldbm_initialize_env if DB3 */
	li->li_envdirok = 0;

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	/* syncfreq is 0 if disabled, or # seconds */
	li->li_dbsyncfreq = 0;

	/* wait up to dbsyncwaitn times if server is busy */
	li->li_dbsyncwaitn = 12;

	/* delay interval */
	li->li_dbsyncwaitinterval = 5;

	/* flag to notify ldbm_cache_sync_daemon to shut down */
	li->li_dbshutdown = 0;

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	/* initialize various mutex locks & condition variables */
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	ldap_pvt_thread_rdwr_init( &li->li_giant_rwlock );
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	ldap_pvt_thread_mutex_init( &li->li_cache.c_mutex );
	ldap_pvt_thread_mutex_init( &li->li_dbcache_mutex );
	ldap_pvt_thread_cond_init( &li->li_dbcache_cv );
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	be->be_private = li;
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	return 0;
}

int
ldbm_back_db_open(
    BackendDB	*be
)
{
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	struct ldbminfo *li = (struct ldbminfo *) be->be_private;
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	li->li_dbenv = ldbm_initialize_env( li->li_directory,
		li->li_dbcachesize, &li->li_envdirok );
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	/* sync thread */
	if ( li->li_dbsyncfreq > 0 )
	{
		int rc;
		rc = ldap_pvt_thread_create( &li->li_dbsynctid,
			0, ldbm_cache_sync_daemon, (void*)be );

		if ( rc != 0 )
		{
			Debug(	LDAP_DEBUG_ANY,
				"sync ldap_pvt_thread_create failed (%d)\n", rc, 0, 0 );
			return 1;
		}
	}

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	return 0;
}

int
ldbm_back_db_destroy(
    BackendDB	*be
)
{
	/* should free/destroy every in be_private */
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	struct ldbminfo	*li = (struct ldbminfo *) be->be_private;
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	if (li->li_dbenv)
	    ldbm_shutdown_env(li->li_dbenv);
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	free( li->li_directory );
	attr_index_destroy( li->li_attrs );

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	ldap_pvt_thread_rdwr_destroy( &li->li_giant_rwlock );
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	ldap_pvt_thread_mutex_destroy( &li->li_cache.c_mutex );
	ldap_pvt_thread_mutex_destroy( &li->li_dbcache_mutex );
	ldap_pvt_thread_cond_destroy( &li->li_dbcache_cv );
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	free( be->be_private );
	be->be_private = NULL;
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	return 0;
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}
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#if SLAPD_LDBM == SLAPD_MOD_DYNAMIC

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/* conditionally define the init_module() function */
SLAP_BACKEND_INIT_MODULE( ldbm )
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#endif /* SLAPD_LDBM == SLAPD_MOD_DYNAMIC */
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