1 files changed, 828 insertions, 0 deletions

diff --git a/servers/slapd/back-mdb/config.c b/servers/slapd/back-mdb/config.c
new file mode 100644
index 0000000..ce6d78a
--- /dev/null
+++ b/servers/slapd/back-mdb/config.c
@@ -0,0 +1,828 @@
+/* config.c - mdb backend configuration file routine */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 2000-2022 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 <stdio.h>
+#include <ac/ctype.h>
+#include <ac/string.h>
+#include <ac/errno.h>
+
+#include "back-mdb.h"
+#include "idl.h"
+
+#include "slap-config.h"
+
+#include "lutil.h"
+#include "ldap_rq.h"
+
+
+static ConfigDriver mdb_cf_gen;
+static ConfigDriver mdb_bk_cfg;
+
+enum {
+	MDB_CHKPT = 1,
+	MDB_DIRECTORY,
+	MDB_DBNOSYNC,
+	MDB_ENVFLAGS,
+	MDB_INDEX,
+	MDB_MAXREADERS,
+	MDB_MAXSIZE,
+	MDB_MODE,
+	MDB_SSTACK,
+	MDB_MULTIVAL,
+	MDB_IDLEXP,
+};
+
+static ConfigTable mdbcfg[] = {
+	{ "idlexp", "log", 2, 2, 0, ARG_UINT|ARG_MAGIC|MDB_IDLEXP,
+		mdb_bk_cfg, "( OLcfgBkAt:12.1 NAME 'olcBkMdbIdlExp' "
+			"DESC 'Power of 2 used to set IDL size' "
+			"EQUALITY integerMatch "
+			"SYNTAX OMsInteger SINGLE-VALUE )", NULL, NULL },
+	{ "directory", "dir", 2, 2, 0, ARG_STRING|ARG_MAGIC|MDB_DIRECTORY,
+		mdb_cf_gen, "( OLcfgDbAt:0.1 NAME 'olcDbDirectory' "
+			"DESC 'Directory for database content' "
+			"EQUALITY caseExactMatch "
+			"SYNTAX OMsDirectoryString SINGLE-VALUE )", NULL, NULL },
+	{ "checkpoint", "kbyte> <min", 3, 3, 0, ARG_MAGIC|MDB_CHKPT,
+		mdb_cf_gen, "( OLcfgDbAt:1.2 NAME 'olcDbCheckpoint' "
+			"DESC 'Database checkpoint interval in kbytes and minutes' "
+			"EQUALITY caseIgnoreMatch "
+			"SYNTAX OMsDirectoryString SINGLE-VALUE )",NULL, NULL },
+	{ "dbnosync", NULL, 1, 2, 0, ARG_ON_OFF|ARG_MAGIC|MDB_DBNOSYNC,
+		mdb_cf_gen, "( OLcfgDbAt:1.4 NAME 'olcDbNoSync' "
+			"DESC 'Disable synchronous database writes' "
+			"EQUALITY booleanMatch "
+			"SYNTAX OMsBoolean SINGLE-VALUE )", NULL, NULL },
+	{ "envflags", "flags", 2, 0, 0, ARG_MAGIC|MDB_ENVFLAGS,
+		mdb_cf_gen, "( OLcfgDbAt:12.3 NAME 'olcDbEnvFlags' "
+			"DESC 'Database environment flags' "
+			"EQUALITY caseIgnoreMatch "
+			"SYNTAX OMsDirectoryString )", NULL, NULL },
+	{ "index", "attr> <[pres,eq,approx,sub]", 2, 3, 0, ARG_MAGIC|MDB_INDEX,
+		mdb_cf_gen, "( OLcfgDbAt:0.2 NAME 'olcDbIndex' "
+		"DESC 'Attribute index parameters' "
+		"EQUALITY caseIgnoreMatch "
+		"SYNTAX OMsDirectoryString )", NULL, NULL },
+	{ "maxentrysize", "size", 2, 2, 0, ARG_ULONG|ARG_OFFSET,
+		(void *)offsetof(struct mdb_info, mi_maxentrysize),
+		"( OLcfgDbAt:12.4 NAME 'olcDbMaxEntrySize' "
+		"DESC 'Maximum size of an entry in bytes' "
+		"EQUALITY integerMatch "
+		"SYNTAX OMsInteger SINGLE-VALUE )", NULL, NULL },
+	{ "maxreaders", "num", 2, 2, 0, ARG_UINT|ARG_MAGIC|MDB_MAXREADERS,
+		mdb_cf_gen, "( OLcfgDbAt:12.1 NAME 'olcDbMaxReaders' "
+		"DESC 'Maximum number of threads that may access the DB concurrently' "
+		"EQUALITY integerMatch "
+		"SYNTAX OMsInteger SINGLE-VALUE )", NULL, NULL },
+	{ "maxsize", "size", 2, 2, 0, ARG_ULONG|ARG_MAGIC|MDB_MAXSIZE,
+		mdb_cf_gen, "( OLcfgDbAt:12.2 NAME 'olcDbMaxSize' "
+		"DESC 'Maximum size of DB in bytes' "
+		"EQUALITY integerMatch "
+		"SYNTAX OMsInteger SINGLE-VALUE )", NULL, NULL },
+	{ "mode", "mode", 2, 2, 0, ARG_MAGIC|MDB_MODE,
+		mdb_cf_gen, "( OLcfgDbAt:0.3 NAME 'olcDbMode' "
+		"DESC 'Unix permissions of database files' "
+		"EQUALITY caseIgnoreMatch "
+		"SYNTAX OMsDirectoryString SINGLE-VALUE )", NULL, NULL },
+	{ "multival", "attr> <hi,lo", 3, 3, 0, ARG_MAGIC|MDB_MULTIVAL,
+		mdb_cf_gen,
+		"( OLcfgDbAt:12.6 NAME 'olcDbMultival' "
+		"DESC 'Hi/Lo thresholds for splitting multivalued attr out of main blob' "
+		"EQUALITY caseIgnoreMatch "
+		"SYNTAX OMsDirectoryString )", NULL, NULL },
+	{ "rtxnsize", "entries", 2, 2, 0, ARG_UINT|ARG_OFFSET,
+		(void *)offsetof(struct mdb_info, mi_rtxn_size),
+		"( OLcfgDbAt:12.5 NAME 'olcDbRtxnSize' "
+		"DESC 'Number of entries to process in one read transaction' "
+		"EQUALITY integerMatch "
+		"SYNTAX OMsInteger SINGLE-VALUE )", NULL,
+		{ .v_uint = DEFAULT_RTXN_SIZE } },
+	{ "searchstack", "depth", 2, 2, 0, ARG_INT|ARG_MAGIC|MDB_SSTACK,
+		mdb_cf_gen, "( OLcfgDbAt:1.9 NAME 'olcDbSearchStack' "
+		"DESC 'Depth of search stack in IDLs' "
+		"EQUALITY integerMatch "
+		"SYNTAX OMsInteger SINGLE-VALUE )", NULL, NULL },
+	{ NULL, NULL, 0, 0, 0, ARG_IGNORED,
+		NULL, NULL, NULL, NULL }
+};
+
+static ConfigOCs mdbocs[] = {
+	{
+		"( OLcfgBkOc:12.1 "
+		"NAME 'olcMdbBkConfig' "
+		"DESC 'MDB backend configuration' "
+		"SUP olcBackendConfig "
+		"MAY olcBkMdbIdlExp )",
+			Cft_Backend, mdbcfg },
+	{
+		"( OLcfgDbOc:12.1 "
+		"NAME 'olcMdbConfig' "
+		"DESC 'MDB database configuration' "
+		"SUP olcDatabaseConfig "
+		"MUST olcDbDirectory "
+		"MAY ( olcDbCheckpoint $ olcDbEnvFlags $ "
+		"olcDbNoSync $ olcDbIndex $ olcDbMaxReaders $ olcDbMaxSize $ "
+		"olcDbMode $ olcDbSearchStack $ olcDbMaxEntrySize $ olcDbRtxnSize $ "
+		"olcDbMultival ) )",
+			Cft_Database, mdbcfg+1 },
+	{ NULL, 0, NULL }
+};
+
+static slap_verbmasks mdb_envflags[] = {
+	{ BER_BVC("nosync"),	MDB_NOSYNC },
+	{ BER_BVC("nometasync"),	MDB_NOMETASYNC },
+	{ BER_BVC("writemap"),	MDB_WRITEMAP },
+	{ BER_BVC("mapasync"),	MDB_MAPASYNC },
+	{ BER_BVC("nordahead"),	MDB_NORDAHEAD },
+	{ BER_BVNULL, 0 }
+};
+
+static int
+mdb_bk_cfg( ConfigArgs *c )
+{
+	int rc = 0;
+	if ( c->op == SLAP_CONFIG_EMIT ) {
+		if ( MDB_idl_logn != MDB_IDL_LOGN )
+			c->value_int = MDB_idl_logn;
+		else
+			rc = 1;
+	} else if ( c->op == LDAP_MOD_DELETE ) {
+		/* We expect to immediately be followed by an Add, but */
+		MDB_idl_logn = MDB_IDL_LOGN;	/* return to default for safety */
+		mdb_idl_reset();
+		c->bi->bi_private = 0;
+	} else {
+		/* with 32 bit ints, db_size max is 2^30 and um_size max is 2^31 */
+		if ( c->value_int >= MDB_IDL_LOGN && ( c->value_int < sizeof(int) * CHAR_BIT - 1 )) {
+			MDB_idl_logn = c->value_int;
+			mdb_idl_reset();
+			c->bi->bi_private = (void *)8;	/* non-NULL to show we're using it */
+		} else {
+			rc = 1;
+		}
+	}
+	return rc;
+}
+
+/* perform periodic syncs */
+static void *
+mdb_checkpoint( void *ctx, void *arg )
+{
+	struct re_s *rtask = arg;
+	struct mdb_info *mdb = rtask->arg;
+
+	mdb_env_sync( mdb->mi_dbenv, 1 );
+	ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
+	ldap_pvt_runqueue_stoptask( &slapd_rq, rtask );
+	ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
+	return NULL;
+}
+
+/* reindex entries on the fly */
+static void *
+mdb_online_index( void *ctx, void *arg )
+{
+	struct re_s *rtask = arg;
+	BackendDB *be = rtask->arg;
+	struct mdb_info *mdb = be->be_private;
+
+	Connection conn = {0};
+	OperationBuffer opbuf;
+	Operation *op;
+
+	MDB_cursor *curs;
+	MDB_val key, data;
+	MDB_txn *txn;
+	ID id;
+	Entry *e;
+	int rc, getnext = 1;
+	int i;
+
+	connection_fake_init( &conn, &opbuf, ctx );
+	op = &opbuf.ob_op;
+
+	op->o_bd = be;
+
+	id = 1;
+	key.mv_size = sizeof(ID);
+
+	while ( 1 ) {
+		if ( slapd_shutdown )
+			break;
+
+		rc = mdb_txn_begin( mdb->mi_dbenv, NULL, 0, &txn );
+		if ( rc )
+			break;
+		rc = mdb_cursor_open( txn, mdb->mi_id2entry, &curs );
+		if ( rc ) {
+			mdb_txn_abort( txn );
+			break;
+		}
+		if ( getnext ) {
+			getnext = 0;
+			key.mv_data = &id;
+			rc = mdb_cursor_get( curs, &key, &data, MDB_SET_RANGE );
+			if ( rc ) {
+				mdb_txn_abort( txn );
+				if ( rc == MDB_NOTFOUND )
+					rc = 0;
+				break;
+			}
+			memcpy( &id, key.mv_data, sizeof( id ));
+		}
+
+		rc = mdb_id2entry( op, curs, id, &e );
+		mdb_cursor_close( curs );
+		if ( rc ) {
+			mdb_txn_abort( txn );
+			if ( rc == MDB_NOTFOUND ) {
+				id++;
+				getnext = 1;
+				continue;
+			}
+			break;
+		}
+		rc = mdb_index_entry( op, txn, MDB_INDEX_UPDATE_OP, e );
+		mdb_entry_return( op, e );
+		if ( rc == 0 ) {
+			rc = mdb_txn_commit( txn );
+			txn = NULL;
+		} else {
+			mdb_txn_abort( txn );
+			txn = NULL;
+		}
+		if ( rc ) {
+			Debug( LDAP_DEBUG_ANY,
+				LDAP_XSTRING(mdb_online_index) ": database %s: "
+				"txn_commit failed: %s (%d)\n",
+				be->be_suffix[0].bv_val, mdb_strerror(rc), rc );
+			break;
+		}
+		id++;
+		getnext = 1;
+	}
+
+	for ( i = 0; i < mdb->mi_nattrs; i++ ) {
+		if ( mdb->mi_attrs[ i ]->ai_indexmask & MDB_INDEX_DELETING
+			|| mdb->mi_attrs[ i ]->ai_newmask == 0 )
+		{
+			continue;
+		}
+		mdb->mi_attrs[ i ]->ai_indexmask = mdb->mi_attrs[ i ]->ai_newmask;
+		mdb->mi_attrs[ i ]->ai_newmask = 0;
+	}
+
+	ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
+	ldap_pvt_runqueue_stoptask( &slapd_rq, rtask );
+	mdb->mi_index_task = NULL;
+	ldap_pvt_runqueue_remove( &slapd_rq, rtask );
+	ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
+
+	return NULL;
+}
+
+/* Cleanup loose ends after Modify completes */
+static int
+mdb_cf_cleanup( ConfigArgs *c )
+{
+	struct mdb_info *mdb = c->be->be_private;
+	int rc = 0;
+
+	if ( mdb->mi_flags & MDB_DEL_INDEX ) {
+		mdb_attr_flush( mdb );
+		mdb->mi_flags ^= MDB_DEL_INDEX;
+	}
+
+	if ( mdb->mi_flags & MDB_RE_OPEN ) {
+		mdb->mi_flags ^= MDB_RE_OPEN;
+		rc = c->be->bd_info->bi_db_close( c->be, &c->reply );
+		if ( rc == 0 )
+			rc = c->be->bd_info->bi_db_open( c->be, &c->reply );
+		/* If this fails, we need to restart */
+		if ( rc ) {
+			slapd_shutdown = 2;
+			snprintf( c->cr_msg, sizeof( c->cr_msg ),
+				"failed to reopen database, rc=%d", rc );
+			Debug( LDAP_DEBUG_ANY, LDAP_XSTRING(mdb_cf_cleanup)
+				": %s\n", c->cr_msg );
+			rc = LDAP_OTHER;
+		}
+	}
+
+	if ( mdb->mi_flags & MDB_OPEN_INDEX ) {
+		mdb->mi_flags ^= MDB_OPEN_INDEX;
+		rc = mdb_attr_dbs_open( c->be, NULL, &c->reply );
+		if ( rc )
+			rc = LDAP_OTHER;
+	}
+	return rc;
+}
+
+static int
+mdb_cf_gen( ConfigArgs *c )
+{
+	struct mdb_info *mdb = c->be->be_private;
+	int rc;
+
+	if ( c->op == SLAP_CONFIG_EMIT ) {
+		rc = 0;
+		switch( c->type ) {
+		case MDB_MODE: {
+			char buf[64];
+			struct berval bv;
+			bv.bv_len = snprintf( buf, sizeof(buf), "0%o", mdb->mi_dbenv_mode );
+			if ( bv.bv_len > 0 && bv.bv_len < sizeof(buf) ) {
+				bv.bv_val = buf;
+				value_add_one( &c->rvalue_vals, &bv );
+			} else {
+				rc = 1;
+			}
+			} break;
+
+		case MDB_CHKPT:
+			if ( mdb->mi_txn_cp ) {
+				char buf[64];
+				struct berval bv;
+				bv.bv_len = snprintf( buf, sizeof(buf), "%ld %ld",
+					(long) mdb->mi_txn_cp_kbyte, (long) mdb->mi_txn_cp_min );
+				if ( bv.bv_len > 0 && bv.bv_len < sizeof(buf) ) {
+					bv.bv_val = buf;
+					value_add_one( &c->rvalue_vals, &bv );
+				} else {
+					rc = 1;
+				}
+			} else {
+				rc = 1;
+			}
+			break;
+
+		case MDB_DIRECTORY:
+			if ( mdb->mi_dbenv_home ) {
+				c->value_string = ch_strdup( mdb->mi_dbenv_home );
+			} else {
+				rc = 1;
+			}
+			break;
+
+		case MDB_DBNOSYNC:
+			if ( mdb->mi_dbenv_flags & MDB_NOSYNC )
+				c->value_int = 1;
+			break;
+
+		case MDB_ENVFLAGS:
+			if ( mdb->mi_dbenv_flags ) {
+				mask_to_verbs( mdb_envflags, mdb->mi_dbenv_flags, &c->rvalue_vals );
+			}
+			if ( !c->rvalue_vals ) rc = 1;
+			break;
+
+		case MDB_INDEX:
+			mdb_attr_index_unparse( mdb, &c->rvalue_vals );
+			if ( !c->rvalue_vals ) rc = 1;
+			break;
+
+		case MDB_SSTACK:
+			c->value_int = mdb->mi_search_stack_depth;
+			break;
+
+		case MDB_MAXREADERS:
+			c->value_int = mdb->mi_readers;
+			break;
+
+		case MDB_MAXSIZE:
+			c->value_ulong = mdb->mi_mapsize;
+			break;
+
+		case MDB_MULTIVAL:
+			mdb_attr_multi_unparse( mdb, &c->rvalue_vals );
+			if ( !c->rvalue_vals ) rc = 1;
+			break;
+		}
+		return rc;
+	} else if ( c->op == LDAP_MOD_DELETE ) {
+		rc = 0;
+		switch( c->type ) {
+		case MDB_MODE:
+#if 0
+			/* FIXME: does it make any sense to change the mode,
+			 * if we don't exec a chmod()? */
+			mdb->bi_dbenv_mode = SLAPD_DEFAULT_DB_MODE;
+			break;
+#endif
+
+		/* single-valued no-ops */
+		case MDB_SSTACK:
+		case MDB_MAXREADERS:
+		case MDB_MAXSIZE:
+			break;
+
+		case MDB_CHKPT:
+			if ( mdb->mi_txn_cp_task ) {
+				struct re_s *re = mdb->mi_txn_cp_task;
+				mdb->mi_txn_cp_task = NULL;
+				ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
+				if ( ldap_pvt_runqueue_isrunning( &slapd_rq, re ) )
+					ldap_pvt_runqueue_stoptask( &slapd_rq, re );
+				ldap_pvt_runqueue_remove( &slapd_rq, re );
+				ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
+			}
+			mdb->mi_txn_cp = 0;
+			break;
+		case MDB_DIRECTORY:
+			mdb->mi_flags |= MDB_RE_OPEN;
+			ch_free( mdb->mi_dbenv_home );
+			mdb->mi_dbenv_home = NULL;
+			config_push_cleanup( c, mdb_cf_cleanup );
+			ldap_pvt_thread_pool_purgekey( mdb->mi_dbenv );
+			break;
+		case MDB_DBNOSYNC:
+			mdb_env_set_flags( mdb->mi_dbenv, MDB_NOSYNC, 0 );
+			mdb->mi_dbenv_flags &= ~MDB_NOSYNC;
+			break;
+
+		case MDB_ENVFLAGS:
+			if ( c->valx == -1 ) {
+				int i;
+				for ( i=0; mdb_envflags[i].mask; i++) {
+					if ( mdb->mi_dbenv_flags & mdb_envflags[i].mask ) {
+						/* not all flags are runtime resettable */
+						rc = mdb_env_set_flags( mdb->mi_dbenv, mdb_envflags[i].mask, 0 );
+						if ( rc ) {
+							mdb->mi_flags |= MDB_RE_OPEN;
+							config_push_cleanup( c, mdb_cf_cleanup );
+							rc = 0;
+						}
+						mdb->mi_dbenv_flags ^= mdb_envflags[i].mask;
+					}
+				}
+			} else {
+				int i = verb_to_mask( c->line, mdb_envflags );
+				if ( mdb_envflags[i].mask & mdb->mi_dbenv_flags ) {
+					rc = mdb_env_set_flags( mdb->mi_dbenv, mdb_envflags[i].mask, 0 );
+					if ( rc ) {
+						mdb->mi_flags |= MDB_RE_OPEN;
+						config_push_cleanup( c, mdb_cf_cleanup );
+						rc = 0;
+					}
+					mdb->mi_dbenv_flags ^= mdb_envflags[i].mask;
+				} else {
+					/* unknown keyword */
+					snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s: unknown keyword \"%s\"",
+						c->argv[0], c->argv[i] );
+					Debug( LDAP_DEBUG_CONFIG, "%s %s\n", c->log, c->cr_msg );
+					rc = 1;
+				}
+			}
+			break;
+
+		case MDB_INDEX:
+			if ( c->valx == -1 ) {
+				int i;
+
+				/* delete all */
+				for ( i = 0; i < mdb->mi_nattrs; i++ ) {
+					mdb->mi_attrs[i]->ai_indexmask |= MDB_INDEX_DELETING;
+				}
+				mdb->mi_defaultmask = 0;
+				mdb->mi_flags |= MDB_DEL_INDEX;
+				config_push_cleanup( c, mdb_cf_cleanup );
+
+			} else {
+				struct berval bv, def = BER_BVC("default");
+				char *ptr;
+
+				for (ptr = c->line; !isspace( (unsigned char) *ptr ); ptr++);
+
+				bv.bv_val = c->line;
+				bv.bv_len = ptr - bv.bv_val;
+				if ( bvmatch( &bv, &def )) {
+					mdb->mi_defaultmask = 0;
+
+				} else {
+					int i;
+					char **attrs;
+					char sep;
+
+					sep = bv.bv_val[ bv.bv_len ];
+					bv.bv_val[ bv.bv_len ] = '\0';
+					attrs = ldap_str2charray( bv.bv_val, "," );
+
+					for ( i = 0; attrs[ i ]; i++ ) {
+						AttributeDescription *ad = NULL;
+						const char *text;
+						AttrInfo *ai;
+
+						slap_str2ad( attrs[ i ], &ad, &text );
+						/* if we got here... */
+						assert( ad != NULL );
+
+						ai = mdb_attr_mask( mdb, ad );
+						/* if we got here... */
+						assert( ai != NULL );
+
+						ai->ai_indexmask |= MDB_INDEX_DELETING;
+						mdb->mi_flags |= MDB_DEL_INDEX;
+						config_push_cleanup( c, mdb_cf_cleanup );
+					}
+
+					bv.bv_val[ bv.bv_len ] = sep;
+					ldap_charray_free( attrs );
+				}
+			}
+			break;
+		case MDB_MULTIVAL:
+			if ( c->valx == -1 ) {
+				int i;
+
+				/* delete all */
+				for ( i = 0; i < mdb->mi_nattrs; i++ ) {
+					mdb->mi_attrs[i]->ai_multi_hi = UINT_MAX;
+					mdb->mi_attrs[i]->ai_multi_lo = UINT_MAX;
+				}
+				mdb->mi_multi_hi = UINT_MAX;
+				mdb->mi_multi_lo = UINT_MAX;
+
+			} else {
+				struct berval bv, def = BER_BVC("default");
+				char *ptr;
+
+				for (ptr = c->line; !isspace( (unsigned char) *ptr ); ptr++);
+
+				bv.bv_val = c->line;
+				bv.bv_len = ptr - bv.bv_val;
+				if ( bvmatch( &bv, &def )) {
+					mdb->mi_multi_hi = UINT_MAX;
+					mdb->mi_multi_lo = UINT_MAX;
+
+				} else {
+					int i;
+					char **attrs;
+					char sep;
+
+					sep = bv.bv_val[ bv.bv_len ];
+					bv.bv_val[ bv.bv_len ] = '\0';
+					attrs = ldap_str2charray( bv.bv_val, "," );
+
+					for ( i = 0; attrs[ i ]; i++ ) {
+						AttributeDescription *ad = NULL;
+						const char *text;
+						AttrInfo *ai;
+
+						slap_str2ad( attrs[ i ], &ad, &text );
+						/* if we got here... */
+						assert( ad != NULL );
+
+						ai = mdb_attr_mask( mdb, ad );
+						/* if we got here... */
+						assert( ai != NULL );
+
+						ai->ai_multi_hi = UINT_MAX;
+						ai->ai_multi_lo = UINT_MAX;
+					}
+
+					bv.bv_val[ bv.bv_len ] = sep;
+					ldap_charray_free( attrs );
+				}
+			}
+			break;
+		}
+		return rc;
+	}
+
+	switch( c->type ) {
+	case MDB_MODE:
+		if ( ASCII_DIGIT( c->argv[1][0] ) ) {
+			long mode;
+			char *next;
+			errno = 0;
+			mode = strtol( c->argv[1], &next, 0 );
+			if ( errno != 0 || next == c->argv[1] || next[0] != '\0' ) {
+				fprintf( stderr, "%s: "
+					"unable to parse mode=\"%s\".\n",
+					c->log, c->argv[1] );
+				return 1;
+			}
+			mdb->mi_dbenv_mode = mode;
+
+		} else {
+			char *m = c->argv[1];
+			int who, what, mode = 0;
+
+			if ( strlen( m ) != STRLENOF("-rwxrwxrwx") ) {
+				return 1;
+			}
+
+			if ( m[0] != '-' ) {
+				return 1;
+			}
+
+			m++;
+			for ( who = 0; who < 3; who++ ) {
+				for ( what = 0; what < 3; what++, m++ ) {
+					if ( m[0] == '-' ) {
+						continue;
+					} else if ( m[0] != "rwx"[what] ) {
+						return 1;
+					}
+					mode += ((1 << (2 - what)) << 3*(2 - who));
+				}
+			}
+			mdb->mi_dbenv_mode = mode;
+		}
+		break;
+	case MDB_CHKPT: {
+		unsigned cp_kbyte, cp_min;
+		if ( lutil_atoux( &cp_kbyte, c->argv[1], 0 ) != 0 ) {
+			fprintf( stderr, "%s: "
+				"invalid kbyte \"%s\" in \"checkpoint\".\n",
+				c->log, c->argv[1] );
+			return 1;
+		}
+		if ( lutil_atoux( &cp_min, c->argv[2], 0 ) != 0 ) {
+			fprintf( stderr, "%s: "
+				"invalid minutes \"%s\" in \"checkpoint\".\n",
+				c->log, c->argv[2] );
+			return 1;
+		}
+		mdb->mi_txn_cp = 1;
+		mdb->mi_txn_cp_kbyte = cp_kbyte;
+		mdb->mi_txn_cp_min = cp_min;
+		/* If we're in server mode and time-based checkpointing is enabled,
+		 * submit a task to perform periodic checkpoints.
+		 */
+		if ((slapMode & SLAP_SERVER_MODE) && mdb->mi_txn_cp_min ) {
+			struct re_s *re = mdb->mi_txn_cp_task;
+			if ( re ) {
+				re->interval.tv_sec = mdb->mi_txn_cp_min * 60;
+			} else {
+				if ( c->be->be_suffix == NULL || BER_BVISNULL( &c->be->be_suffix[0] ) ) {
+					fprintf( stderr, "%s: "
+						"\"checkpoint\" must occur after \"suffix\".\n",
+						c->log );
+					return 1;
+				}
+				ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
+				mdb->mi_txn_cp_task = ldap_pvt_runqueue_insert( &slapd_rq,
+					mdb->mi_txn_cp_min * 60, mdb_checkpoint, mdb,
+					LDAP_XSTRING(mdb_checkpoint), c->be->be_suffix[0].bv_val );
+				ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
+			}
+		}
+		} break;
+
+	case MDB_DIRECTORY: {
+		FILE *f;
+		char *ptr, *testpath;
+		int len;
+
+		len = strlen( c->value_string );
+		testpath = ch_malloc( len + STRLENOF(LDAP_DIRSEP) + STRLENOF("DUMMY") + 1 );
+		ptr = lutil_strcopy( testpath, c->value_string );
+		*ptr++ = LDAP_DIRSEP[0];
+		strcpy( ptr, "DUMMY" );
+		f = fopen( testpath, "w" );
+		if ( f ) {
+			fclose( f );
+			unlink( testpath );
+		}
+		ch_free( testpath );
+		if ( !f ) {
+			char ebuf[128];
+			int saved_errno = errno;
+			snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s: invalid path: %s",
+				c->log, AC_STRERROR_R( saved_errno, ebuf, sizeof(ebuf) ) );
+			Debug( LDAP_DEBUG_ANY, "%s\n", c->cr_msg );
+			return -1;
+		}
+
+		if ( mdb->mi_dbenv_home )
+			ch_free( mdb->mi_dbenv_home );
+		mdb->mi_dbenv_home = c->value_string;
+
+		}
+		break;
+
+	case MDB_DBNOSYNC:
+		if ( c->value_int )
+			mdb->mi_dbenv_flags |= MDB_NOSYNC;
+		else
+			mdb->mi_dbenv_flags &= ~MDB_NOSYNC;
+		if ( mdb->mi_flags & MDB_IS_OPEN ) {
+			mdb_env_set_flags( mdb->mi_dbenv, MDB_NOSYNC,
+				c->value_int );
+		}
+		break;
+
+	case MDB_ENVFLAGS: {
+		int i, j;
+		for ( i=1; i<c->argc; i++ ) {
+			j = verb_to_mask( c->argv[i], mdb_envflags );
+			if ( mdb_envflags[j].mask ) {
+				if ( mdb->mi_flags & MDB_IS_OPEN )
+					rc = mdb_env_set_flags( mdb->mi_dbenv, mdb_envflags[j].mask, 1 );
+				else
+					rc = 0;
+				if ( rc ) {
+					mdb->mi_flags |= MDB_RE_OPEN;
+					config_push_cleanup( c, mdb_cf_cleanup );
+					rc = 0;
+				}
+				mdb->mi_dbenv_flags |= mdb_envflags[j].mask;
+			} else {
+				/* unknown keyword */
+				snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s: unknown keyword \"%s\"",
+					c->argv[0], c->argv[i] );
+				Debug( LDAP_DEBUG_ANY, "%s %s\n", c->log, c->cr_msg );
+				return 1;
+			}
+		}
+		}
+		break;
+
+	case MDB_INDEX:
+		rc = mdb_attr_index_config( mdb, c->fname, c->lineno,
+			c->argc - 1, &c->argv[1], &c->reply);
+
+		if( rc != LDAP_SUCCESS ) return 1;
+		if ( mdb->mi_flags & MDB_IS_OPEN ) {
+			mdb->mi_flags |= MDB_OPEN_INDEX;
+			config_push_cleanup( c, mdb_cf_cleanup );
+			if ( !mdb->mi_index_task ) {
+				/* Start the task as soon as we finish here. Set a long
+				 * interval (10 hours) so that it only gets scheduled once.
+				 */
+				if ( c->be->be_suffix == NULL || BER_BVISNULL( &c->be->be_suffix[0] ) ) {
+					fprintf( stderr, "%s: "
+						"\"index\" must occur after \"suffix\".\n",
+						c->log );
+					return 1;
+				}
+				ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
+				mdb->mi_index_task = ldap_pvt_runqueue_insert( &slapd_rq, 36000,
+					mdb_online_index, c->be,
+					LDAP_XSTRING(mdb_online_index), c->be->be_suffix[0].bv_val );
+				ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
+			}
+		}
+		break;
+
+	case MDB_SSTACK:
+		if ( c->value_int < MINIMUM_SEARCH_STACK_DEPTH ) {
+			fprintf( stderr,
+		"%s: depth %d too small, using %d\n",
+			c->log, c->value_int, MINIMUM_SEARCH_STACK_DEPTH );
+			c->value_int = MINIMUM_SEARCH_STACK_DEPTH;
+		}
+		mdb->mi_search_stack_depth = c->value_int;
+		break;
+
+	case MDB_MAXREADERS:
+		mdb->mi_readers = c->value_int;
+		if ( mdb->mi_flags & MDB_IS_OPEN ) {
+			mdb->mi_flags |= MDB_RE_OPEN;
+			config_push_cleanup( c, mdb_cf_cleanup );
+		}
+		break;
+
+	case MDB_MAXSIZE:
+		mdb->mi_mapsize = c->value_ulong;
+		if ( mdb->mi_flags & MDB_IS_OPEN ) {
+			mdb->mi_flags |= MDB_RE_OPEN;
+			config_push_cleanup( c, mdb_cf_cleanup );
+		}
+		break;
+
+	case MDB_MULTIVAL:
+		rc = mdb_attr_multi_config( mdb, c->fname, c->lineno,
+			c->argc - 1, &c->argv[1], &c->reply);
+
+		if( rc != LDAP_SUCCESS ) return 1;
+		break;
+	}
+	return 0;
+}
+
+int mdb_back_init_cf( BackendInfo *bi )
+{
+	int rc;
+	bi->bi_cf_ocs = mdbocs;
+
+	rc = config_register_schema( mdbcfg, mdbocs );
+	if ( rc ) return rc;
+	return 0;
+}