Adding upstream version 2.4.57+dfsg.upstream/2.4.57+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1512 insertions, 0 deletions

diff --git a/servers/slapd/back-mdb/tools.c b/servers/slapd/back-mdb/tools.c
new file mode 100644
index 0000000..5fa67b0
--- /dev/null
+++ b/servers/slapd/back-mdb/tools.c
@@ -0,0 +1,1512 @@
+/* tools.c - tools for slap tools */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 2011-2021 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/string.h>
+#include <ac/errno.h>
+
+#define AVL_INTERNAL
+#include "back-mdb.h"
+#include "idl.h"
+
+#ifdef MDB_TOOL_IDL_CACHING
+static int mdb_tool_idl_flush( BackendDB *be, MDB_txn *txn );
+
+#define	IDBLOCK	1024
+
+typedef struct mdb_tool_idl_cache_entry {
+	struct mdb_tool_idl_cache_entry *next;
+	ID ids[IDBLOCK];
+} mdb_tool_idl_cache_entry;
+
+typedef struct mdb_tool_idl_cache {
+	struct berval kstr;
+	mdb_tool_idl_cache_entry *head, *tail;
+	ID first, last;
+	int count;
+	short offset;
+	short flags;
+} mdb_tool_idl_cache;
+#define WAS_FOUND	0x01
+#define WAS_RANGE	0x02
+
+#define MDB_TOOL_IDL_FLUSH(be, txn)	mdb_tool_idl_flush(be, txn)
+#else
+#define MDB_TOOL_IDL_FLUSH(be, txn)
+#endif /* MDB_TOOL_IDL_CACHING */
+
+MDB_txn *mdb_tool_txn = NULL;
+
+static MDB_txn *txi = NULL;
+static MDB_cursor *cursor = NULL, *idcursor = NULL;
+static MDB_cursor *mcp = NULL, *mcd = NULL;
+static MDB_val key, data;
+static ID previd = NOID;
+
+typedef struct dn_id {
+	ID id;
+	struct berval dn;
+} dn_id;
+
+#define	HOLE_SIZE	4096
+static dn_id hbuf[HOLE_SIZE], *holes = hbuf;
+static unsigned nhmax = HOLE_SIZE;
+static unsigned nholes;
+
+static struct berval	*tool_base;
+static int		tool_scope;
+static Filter		*tool_filter;
+static Entry		*tool_next_entry;
+
+static ID mdb_tool_ix_id;
+static Operation *mdb_tool_ix_op;
+static MDB_txn *mdb_tool_ix_txn;
+static int mdb_tool_index_tcount, mdb_tool_threads;
+static IndexRec *mdb_tool_index_rec;
+static struct mdb_info *mdb_tool_info;
+static ldap_pvt_thread_mutex_t mdb_tool_index_mutex;
+static ldap_pvt_thread_cond_t mdb_tool_index_cond_main;
+static ldap_pvt_thread_cond_t mdb_tool_index_cond_work;
+static void * mdb_tool_index_task( void *ctx, void *ptr );
+
+static int	mdb_writes, mdb_writes_per_commit;
+
+/* Number of ops per commit in Quick mode.
+ * Batching speeds writes overall, but too large a
+ * batch will fail with MDB_TXN_FULL.
+ */
+#ifndef MDB_WRITES_PER_COMMIT
+#define MDB_WRITES_PER_COMMIT	500
+#endif
+
+static int
+mdb_tool_entry_get_int( BackendDB *be, ID id, Entry **ep );
+
+int mdb_tool_entry_open(
+	BackendDB *be, int mode )
+{
+	/* In Quick mode, commit once per 500 entries */
+	mdb_writes = 0;
+	if ( slapMode & SLAP_TOOL_QUICK )
+		mdb_writes_per_commit = MDB_WRITES_PER_COMMIT;
+	else
+		mdb_writes_per_commit = 1;
+
+	/* Set up for threaded slapindex */
+	if (( slapMode & (SLAP_TOOL_QUICK|SLAP_TOOL_READONLY)) == SLAP_TOOL_QUICK ) {
+		if ( !mdb_tool_info ) {
+			struct mdb_info *mdb = (struct mdb_info *) be->be_private;
+			ldap_pvt_thread_mutex_init( &mdb_tool_index_mutex );
+			ldap_pvt_thread_cond_init( &mdb_tool_index_cond_main );
+			ldap_pvt_thread_cond_init( &mdb_tool_index_cond_work );
+			if ( mdb->mi_nattrs ) {
+				int i;
+#if 0			/* threaded indexing has no performance advantage */
+				mdb_tool_threads = slap_tool_thread_max - 1;
+#endif
+				if ( mdb_tool_threads > 1 ) {
+					mdb_tool_index_rec = ch_calloc( mdb->mi_nattrs, sizeof( IndexRec ));
+					mdb_tool_index_tcount = mdb_tool_threads - 1;
+					for (i=1; i<mdb_tool_threads; i++) {
+						int *ptr = ch_malloc( sizeof( int ));
+						*ptr = i;
+						ldap_pvt_thread_pool_submit( &connection_pool,
+							mdb_tool_index_task, ptr );
+					}
+					mdb_tool_info = mdb;
+				}
+			}
+		}
+	}
+
+	return 0;
+}
+
+int mdb_tool_entry_close(
+	BackendDB *be )
+{
+	if ( mdb_tool_info ) {
+		slapd_shutdown = 1;
+		ldap_pvt_thread_mutex_lock( &mdb_tool_index_mutex );
+
+		/* There might still be some threads starting */
+		while ( mdb_tool_index_tcount > 0 ) {
+			ldap_pvt_thread_cond_wait( &mdb_tool_index_cond_main,
+					&mdb_tool_index_mutex );
+		}
+
+		mdb_tool_index_tcount = mdb_tool_threads - 1;
+		ldap_pvt_thread_cond_broadcast( &mdb_tool_index_cond_work );
+
+		/* Make sure all threads are stopped */
+		while ( mdb_tool_index_tcount > 0 ) {
+			ldap_pvt_thread_cond_wait( &mdb_tool_index_cond_main,
+				&mdb_tool_index_mutex );
+		}
+		ldap_pvt_thread_mutex_unlock( &mdb_tool_index_mutex );
+
+		mdb_tool_info = NULL;
+		slapd_shutdown = 0;
+		ch_free( mdb_tool_index_rec );
+		mdb_tool_index_tcount = mdb_tool_threads - 1;
+	}
+
+	if( idcursor ) {
+		mdb_cursor_close( idcursor );
+		idcursor = NULL;
+	}
+	if( cursor ) {
+		mdb_cursor_close( cursor );
+		cursor = NULL;
+	}
+	{
+		struct mdb_info *mdb = be->be_private;
+		if ( mdb ) {
+			int i;
+			for (i=0; i<mdb->mi_nattrs; i++)
+				mdb->mi_attrs[i]->ai_cursor = NULL;
+		}
+	}
+	if( mdb_tool_txn ) {
+		int rc;
+		MDB_TOOL_IDL_FLUSH( be, mdb_tool_txn );
+		if (( rc = mdb_txn_commit( mdb_tool_txn ))) {
+			Debug( LDAP_DEBUG_ANY,
+				LDAP_XSTRING(mdb_tool_entry_close) ": database %s: "
+				"txn_commit failed: %s (%d)\n",
+				be->be_suffix[0].bv_val, mdb_strerror(rc), rc );
+			return -1;
+		}
+		mdb_tool_txn = NULL;
+	}
+	if( txi ) {
+		int rc;
+		if (( rc = mdb_txn_commit( txi ))) {
+			Debug( LDAP_DEBUG_ANY,
+				LDAP_XSTRING(mdb_tool_entry_close) ": database %s: "
+				"txn_commit failed: %s (%d)\n",
+				be->be_suffix[0].bv_val, mdb_strerror(rc), rc );
+			return -1;
+		}
+		txi = NULL;
+	}
+
+	if( nholes ) {
+		unsigned i;
+		fprintf( stderr, "Error, entries missing!\n");
+		for (i=0; i<nholes; i++) {
+			fprintf(stderr, "  entry %ld: %s\n",
+				holes[i].id, holes[i].dn.bv_val);
+		}
+		nholes = 0;
+		return -1;
+	}
+
+	return 0;
+}
+
+ID
+mdb_tool_entry_first_x(
+	BackendDB *be,
+	struct berval *base,
+	int scope,
+	Filter *f )
+{
+	tool_base = base;
+	tool_scope = scope;
+	tool_filter = f;
+
+	return mdb_tool_entry_next( be );
+}
+
+ID mdb_tool_entry_next(
+	BackendDB *be )
+{
+	int rc;
+	ID id;
+	struct mdb_info *mdb;
+
+	assert( be != NULL );
+	assert( slapMode & SLAP_TOOL_MODE );
+
+	mdb = (struct mdb_info *) be->be_private;
+	assert( mdb != NULL );
+
+	if ( !mdb_tool_txn ) {
+		rc = mdb_txn_begin( mdb->mi_dbenv, NULL, MDB_RDONLY, &mdb_tool_txn );
+		if ( rc )
+			return NOID;
+		rc = mdb_cursor_open( mdb_tool_txn, mdb->mi_id2entry, &cursor );
+		if ( rc ) {
+			mdb_txn_abort( mdb_tool_txn );
+			return NOID;
+		}
+	}
+
+next:;
+	rc = mdb_cursor_get( cursor, &key, &data, MDB_NEXT );
+
+	if( rc ) {
+		return NOID;
+	}
+
+	previd = *(ID *)key.mv_data;
+	id = previd;
+
+	if ( !data.mv_size )
+		goto next;
+
+	if ( tool_filter || tool_base ) {
+		static Operation op = {0};
+		static Opheader ohdr = {0};
+
+		op.o_hdr = &ohdr;
+		op.o_bd = be;
+		op.o_tmpmemctx = NULL;
+		op.o_tmpmfuncs = &ch_mfuncs;
+
+		if ( tool_next_entry ) {
+			mdb_entry_release( &op, tool_next_entry, 0 );
+			tool_next_entry = NULL;
+		}
+
+		rc = mdb_tool_entry_get_int( be, id, &tool_next_entry );
+		if ( rc == LDAP_NO_SUCH_OBJECT ) {
+			goto next;
+		}
+
+		assert( tool_next_entry != NULL );
+
+		if ( tool_filter && test_filter( NULL, tool_next_entry, tool_filter ) != LDAP_COMPARE_TRUE )
+		{
+			mdb_entry_release( &op, tool_next_entry, 0 );
+			tool_next_entry = NULL;
+			goto next;
+		}
+	}
+
+	return id;
+}
+
+ID mdb_tool_dn2id_get(
+	Backend *be,
+	struct berval *dn
+)
+{
+	struct mdb_info *mdb;
+	Operation op = {0};
+	Opheader ohdr = {0};
+	ID id;
+	int rc;
+
+	if ( BER_BVISEMPTY(dn) )
+		return 0;
+
+	mdb = (struct mdb_info *) be->be_private;
+
+	if ( !mdb_tool_txn ) {
+		rc = mdb_txn_begin( mdb->mi_dbenv, NULL, (slapMode & SLAP_TOOL_READONLY) != 0 ?
+			MDB_RDONLY : 0, &mdb_tool_txn );
+		if ( rc )
+			return NOID;
+	}
+
+	op.o_hdr = &ohdr;
+	op.o_bd = be;
+	op.o_tmpmemctx = NULL;
+	op.o_tmpmfuncs = &ch_mfuncs;
+
+	rc = mdb_dn2id( &op, mdb_tool_txn, NULL, dn, &id, NULL, NULL, NULL );
+	if ( rc == MDB_NOTFOUND )
+		return NOID;
+
+	return id;
+}
+
+static int
+mdb_tool_entry_get_int( BackendDB *be, ID id, Entry **ep )
+{
+	Operation op = {0};
+	Opheader ohdr = {0};
+
+	Entry *e = NULL;
+	struct berval dn = BER_BVNULL, ndn = BER_BVNULL;
+	int rc;
+
+	assert( be != NULL );
+	assert( slapMode & SLAP_TOOL_MODE );
+
+	if ( ( tool_filter || tool_base ) && id == previd && tool_next_entry != NULL ) {
+		*ep = tool_next_entry;
+		tool_next_entry = NULL;
+		return LDAP_SUCCESS;
+	}
+
+	if ( id != previd ) {
+		key.mv_size = sizeof(ID);
+		key.mv_data = &id;
+		rc = mdb_cursor_get( cursor, &key, &data, MDB_SET );
+		if ( rc ) {
+			rc = LDAP_OTHER;
+			goto done;
+		}
+	}
+	if ( !data.mv_size ) {
+		rc = LDAP_NO_SUCH_OBJECT;
+		goto done;
+	}
+
+	op.o_hdr = &ohdr;
+	op.o_bd = be;
+	op.o_tmpmemctx = NULL;
+	op.o_tmpmfuncs = &ch_mfuncs;
+	if ( slapMode & SLAP_TOOL_READONLY ) {
+		rc = mdb_id2name( &op, mdb_tool_txn, &idcursor, id, &dn, &ndn );
+		if ( rc  ) {
+			rc = LDAP_OTHER;
+			goto done;
+		}
+		if ( tool_base != NULL ) {
+			if ( !dnIsSuffixScope( &ndn, tool_base, tool_scope ) ) {
+				ch_free( dn.bv_val );
+				ch_free( ndn.bv_val );
+				rc = LDAP_NO_SUCH_OBJECT;
+				goto done;
+			}
+		}
+	}
+	rc = mdb_entry_decode( &op, mdb_tool_txn, &data, &e );
+	e->e_id = id;
+	if ( !BER_BVISNULL( &dn )) {
+		e->e_name = dn;
+		e->e_nname = ndn;
+	} else {
+		e->e_name.bv_val = NULL;
+		e->e_nname.bv_val = NULL;
+	}
+
+done:
+	if ( e != NULL ) {
+		*ep = e;
+	}
+
+	return rc;
+}
+
+Entry*
+mdb_tool_entry_get( BackendDB *be, ID id )
+{
+	Entry *e = NULL;
+	int rc;
+
+	if ( !mdb_tool_txn ) {
+		struct mdb_info *mdb = (struct mdb_info *) be->be_private;
+		rc = mdb_txn_begin( mdb->mi_dbenv, NULL,
+			(slapMode & SLAP_TOOL_READONLY) ? MDB_RDONLY : 0, &mdb_tool_txn );
+		if ( rc )
+			return NULL;
+	}
+	if ( !cursor ) {
+		struct mdb_info *mdb = (struct mdb_info *) be->be_private;
+		rc = mdb_cursor_open( mdb_tool_txn, mdb->mi_id2entry, &cursor );
+		if ( rc ) {
+			mdb_txn_abort( mdb_tool_txn );
+			mdb_tool_txn = NULL;
+			return NULL;
+		}
+	}
+	(void)mdb_tool_entry_get_int( be, id, &e );
+	return e;
+}
+
+static int mdb_tool_next_id(
+	Operation *op,
+	MDB_txn *tid,
+	Entry *e,
+	struct berval *text,
+	int hole )
+{
+	struct berval dn = e->e_name;
+	struct berval ndn = e->e_nname;
+	struct berval pdn, npdn, nmatched;
+	ID id, pid = 0;
+	int rc;
+
+	if (ndn.bv_len == 0) {
+		e->e_id = 0;
+		return 0;
+	}
+
+	rc = mdb_dn2id( op, tid, mcp, &ndn, &id, NULL, NULL, &nmatched );
+	if ( rc == MDB_NOTFOUND ) {
+		if ( !be_issuffix( op->o_bd, &ndn ) ) {
+			ID eid = e->e_id;
+			dnParent( &ndn, &npdn );
+			if ( nmatched.bv_len != npdn.bv_len ) {
+				dnParent( &dn, &pdn );
+				e->e_name = pdn;
+				e->e_nname = npdn;
+				rc = mdb_tool_next_id( op, tid, e, text, 1 );
+				e->e_name = dn;
+				e->e_nname = ndn;
+				if ( rc ) {
+					return rc;
+				}
+				/* If parent didn't exist, it was created just now
+				 * and its ID is now in e->e_id. Make sure the current
+				 * entry gets added under the new parent ID.
+				 */
+				if ( eid != e->e_id ) {
+					pid = e->e_id;
+				}
+			} else {
+				pid = id;
+			}
+		}
+		rc = mdb_next_id( op->o_bd, idcursor, &e->e_id );
+		if ( rc ) {
+			snprintf( text->bv_val, text->bv_len,
+				"next_id failed: %s (%d)",
+				mdb_strerror(rc), rc );
+		Debug( LDAP_DEBUG_ANY,
+			"=> mdb_tool_next_id: %s\n", text->bv_val, 0, 0 );
+			return rc;
+		}
+		rc = mdb_dn2id_add( op, mcp, mcd, pid, 1, 1, e );
+		if ( rc ) {
+			snprintf( text->bv_val, text->bv_len,
+				"dn2id_add failed: %s (%d)",
+				mdb_strerror(rc), rc );
+			Debug( LDAP_DEBUG_ANY,
+				"=> mdb_tool_next_id: %s\n", text->bv_val, 0, 0 );
+		} else if ( hole ) {
+			MDB_val key, data;
+			if ( nholes == nhmax - 1 ) {
+				if ( holes == hbuf ) {
+					holes = ch_malloc( nhmax * sizeof(dn_id) * 2 );
+					AC_MEMCPY( holes, hbuf, sizeof(hbuf) );
+				} else {
+					holes = ch_realloc( holes, nhmax * sizeof(dn_id) * 2 );
+				}
+				nhmax *= 2;
+			}
+			ber_dupbv( &holes[nholes].dn, &ndn );
+			holes[nholes++].id = e->e_id;
+			key.mv_size = sizeof(ID);
+			key.mv_data = &e->e_id;
+			data.mv_size = 0;
+			data.mv_data = NULL;
+			rc = mdb_cursor_put( idcursor, &key, &data, MDB_NOOVERWRITE );
+			if ( rc == MDB_KEYEXIST )
+				rc = 0;
+			if ( rc ) {
+				snprintf( text->bv_val, text->bv_len,
+					"dummy id2entry add failed: %s (%d)",
+					mdb_strerror(rc), rc );
+				Debug( LDAP_DEBUG_ANY,
+					"=> mdb_tool_next_id: %s\n", text->bv_val, 0, 0 );
+			}
+		}
+	} else if ( !hole ) {
+		unsigned i, j;
+
+		e->e_id = id;
+
+		for ( i=0; i<nholes; i++) {
+			if ( holes[i].id == e->e_id ) {
+				free(holes[i].dn.bv_val);
+				for (j=i;j<nholes;j++) holes[j] = holes[j+1];
+				holes[j].id = 0;
+				nholes--;
+				break;
+			} else if ( holes[i].id > e->e_id ) {
+				break;
+			}
+		}
+	}
+	return rc;
+}
+
+static int
+mdb_tool_index_add(
+	Operation *op,
+	MDB_txn *txn,
+	Entry *e )
+{
+	struct mdb_info *mdb = (struct mdb_info *) op->o_bd->be_private;
+
+	if ( !mdb->mi_nattrs )
+		return 0;
+
+	if ( mdb_tool_threads > 1 ) {
+		IndexRec *ir;
+		int i, rc;
+		Attribute *a;
+
+		ir = mdb_tool_index_rec;
+		for (i=0; i<mdb->mi_nattrs; i++)
+			ir[i].ir_attrs = NULL;
+
+		for ( a = e->e_attrs; a != NULL; a = a->a_next ) {
+			rc = mdb_index_recset( mdb, a, a->a_desc->ad_type,
+				&a->a_desc->ad_tags, ir );
+			if ( rc )
+				return rc;
+		}
+		for (i=0; i<mdb->mi_nattrs; i++) {
+			if ( !ir[i].ir_ai )
+				break;
+			rc = mdb_cursor_open( txn, ir[i].ir_ai->ai_dbi,
+				 &ir[i].ir_ai->ai_cursor );
+			if ( rc )
+				return rc;
+		}
+		mdb_tool_ix_id = e->e_id;
+		mdb_tool_ix_op = op;
+		mdb_tool_ix_txn = txn;
+		ldap_pvt_thread_mutex_lock( &mdb_tool_index_mutex );
+		/* Wait for all threads to be ready */
+		while ( mdb_tool_index_tcount ) {
+			ldap_pvt_thread_cond_wait( &mdb_tool_index_cond_main,
+				&mdb_tool_index_mutex );
+		}
+
+		for ( i=1; i<mdb_tool_threads; i++ )
+			mdb_tool_index_rec[i].ir_i = LDAP_BUSY;
+		mdb_tool_index_tcount = mdb_tool_threads - 1;
+		ldap_pvt_thread_mutex_unlock( &mdb_tool_index_mutex );
+		ldap_pvt_thread_cond_broadcast( &mdb_tool_index_cond_work );
+
+		rc = mdb_index_recrun( op, txn, mdb, ir, e->e_id, 0 );
+		if ( rc )
+			return rc;
+		ldap_pvt_thread_mutex_lock( &mdb_tool_index_mutex );
+		for ( i=1; i<mdb_tool_threads; i++ ) {
+			if ( mdb_tool_index_rec[i].ir_i == LDAP_BUSY ) {
+				ldap_pvt_thread_cond_wait( &mdb_tool_index_cond_main,
+					&mdb_tool_index_mutex );
+				i--;
+				continue;
+			}
+			if ( mdb_tool_index_rec[i].ir_i ) {
+				rc = mdb_tool_index_rec[i].ir_i;
+				break;
+			}
+		}
+		ldap_pvt_thread_mutex_unlock( &mdb_tool_index_mutex );
+		return rc;
+	} else
+	{
+		return mdb_index_entry_add( op, txn, e );
+	}
+}
+
+ID mdb_tool_entry_put(
+	BackendDB *be,
+	Entry *e,
+	struct berval *text )
+{
+	int rc;
+	struct mdb_info *mdb;
+	Operation op = {0};
+	Opheader ohdr = {0};
+
+	assert( be != NULL );
+	assert( slapMode & SLAP_TOOL_MODE );
+
+	assert( text != NULL );
+	assert( text->bv_val != NULL );
+	assert( text->bv_val[0] == '\0' );	/* overconservative? */
+
+	Debug( LDAP_DEBUG_TRACE, "=> " LDAP_XSTRING(mdb_tool_entry_put)
+		"( %ld, \"%s\" )\n", (long) e->e_id, e->e_dn, 0 );
+
+	mdb = (struct mdb_info *) be->be_private;
+
+	if ( !mdb_tool_txn ) {
+		rc = mdb_txn_begin( mdb->mi_dbenv, NULL, 0, &mdb_tool_txn );
+		if( rc != 0 ) {
+			snprintf( text->bv_val, text->bv_len,
+				"txn_begin failed: %s (%d)",
+				mdb_strerror(rc), rc );
+			Debug( LDAP_DEBUG_ANY,
+				"=> " LDAP_XSTRING(mdb_tool_entry_put) ": %s\n",
+				 text->bv_val, 0, 0 );
+			return NOID;
+		}
+		rc = mdb_cursor_open( mdb_tool_txn, mdb->mi_id2entry, &idcursor );
+		if( rc != 0 ) {
+			snprintf( text->bv_val, text->bv_len,
+				"cursor_open failed: %s (%d)",
+				mdb_strerror(rc), rc );
+			Debug( LDAP_DEBUG_ANY,
+				"=> " LDAP_XSTRING(mdb_tool_entry_put) ": %s\n",
+				 text->bv_val, 0, 0 );
+			return NOID;
+		}
+		if ( !mdb->mi_nextid ) {
+			ID dummy;
+			mdb_next_id( be, idcursor, &dummy );
+		}
+		rc = mdb_cursor_open( mdb_tool_txn, mdb->mi_dn2id, &mcp );
+		if( rc != 0 ) {
+			snprintf( text->bv_val, text->bv_len,
+				"cursor_open failed: %s (%d)",
+				mdb_strerror(rc), rc );
+			Debug( LDAP_DEBUG_ANY,
+				"=> " LDAP_XSTRING(mdb_tool_entry_put) ": %s\n",
+				 text->bv_val, 0, 0 );
+			return NOID;
+		}
+		rc = mdb_cursor_open( mdb_tool_txn, mdb->mi_dn2id, &mcd );
+		if( rc != 0 ) {
+			snprintf( text->bv_val, text->bv_len,
+				"cursor_open failed: %s (%d)",
+				mdb_strerror(rc), rc );
+			Debug( LDAP_DEBUG_ANY,
+				"=> " LDAP_XSTRING(mdb_tool_entry_put) ": %s\n",
+				 text->bv_val, 0, 0 );
+			return NOID;
+		}
+	}
+
+	op.o_hdr = &ohdr;
+	op.o_bd = be;
+	op.o_tmpmemctx = NULL;
+	op.o_tmpmfuncs = &ch_mfuncs;
+
+	/* add dn2id indices */
+	rc = mdb_tool_next_id( &op, mdb_tool_txn, e, text, 0 );
+	if( rc != 0 ) {
+		goto done;
+	}
+
+	rc = mdb_tool_index_add( &op, mdb_tool_txn, e );
+	if( rc != 0 ) {
+		snprintf( text->bv_val, text->bv_len,
+				"index_entry_add failed: err=%d", rc );
+		Debug( LDAP_DEBUG_ANY,
+			"=> " LDAP_XSTRING(mdb_tool_entry_put) ": %s\n",
+			text->bv_val, 0, 0 );
+		goto done;
+	}
+
+
+	/* id2entry index */
+	rc = mdb_id2entry_add( &op, mdb_tool_txn, idcursor, e );
+	if( rc != 0 ) {
+		snprintf( text->bv_val, text->bv_len,
+				"id2entry_add failed: err=%d", rc );
+		Debug( LDAP_DEBUG_ANY,
+			"=> " LDAP_XSTRING(mdb_tool_entry_put) ": %s\n",
+			text->bv_val, 0, 0 );
+		goto done;
+	}
+
+done:
+	if( rc == 0 ) {
+		mdb_writes++;
+		if ( mdb_writes >= mdb_writes_per_commit ) {
+			unsigned i;
+			MDB_TOOL_IDL_FLUSH( be, mdb_tool_txn );
+			rc = mdb_txn_commit( mdb_tool_txn );
+			for ( i=0; i<mdb->mi_nattrs; i++ )
+				mdb->mi_attrs[i]->ai_cursor = NULL;
+			mdb_writes = 0;
+			mdb_tool_txn = NULL;
+			idcursor = NULL;
+			if( rc != 0 ) {
+				mdb->mi_numads = 0;
+				snprintf( text->bv_val, text->bv_len,
+						"txn_commit failed: %s (%d)",
+						mdb_strerror(rc), rc );
+				Debug( LDAP_DEBUG_ANY,
+					"=> " LDAP_XSTRING(mdb_tool_entry_put) ": %s\n",
+					text->bv_val, 0, 0 );
+				e->e_id = NOID;
+			}
+		}
+
+	} else {
+		unsigned i;
+		mdb_txn_abort( mdb_tool_txn );
+		mdb_tool_txn = NULL;
+		idcursor = NULL;
+		for ( i=0; i<mdb->mi_nattrs; i++ )
+			mdb->mi_attrs[i]->ai_cursor = NULL;
+		mdb_writes = 0;
+		snprintf( text->bv_val, text->bv_len,
+			"txn_aborted! %s (%d)",
+			rc == LDAP_OTHER ? "Internal error" :
+			mdb_strerror(rc), rc );
+		Debug( LDAP_DEBUG_ANY,
+			"=> " LDAP_XSTRING(mdb_tool_entry_put) ": %s\n",
+			text->bv_val, 0, 0 );
+		e->e_id = NOID;
+	}
+
+	return e->e_id;
+}
+
+static int mdb_dn2id_upgrade( BackendDB *be );
+
+int mdb_tool_entry_reindex(
+	BackendDB *be,
+	ID id,
+	AttributeDescription **adv )
+{
+	struct mdb_info *mi = (struct mdb_info *) be->be_private;
+	int rc;
+	Entry *e;
+	Operation op = {0};
+	Opheader ohdr = {0};
+
+	Debug( LDAP_DEBUG_ARGS,
+		"=> " LDAP_XSTRING(mdb_tool_entry_reindex) "( %ld )\n",
+		(long) id, 0, 0 );
+	assert( tool_base == NULL );
+	assert( tool_filter == NULL );
+
+	/* Special: do a dn2id upgrade */
+	if ( adv && adv[0] == slap_schema.si_ad_entryDN ) {
+		/* short-circuit tool_entry_next() */
+		mdb_cursor_get( cursor, &key, &data, MDB_LAST );
+		return mdb_dn2id_upgrade( be );
+	}
+
+	/* No indexes configured, nothing to do. Could return an
+	 * error here to shortcut things.
+	 */
+	if (!mi->mi_attrs) {
+		return 0;
+	}
+
+	/* Check for explicit list of attrs to index */
+	if ( adv ) {
+		int i, j, n;
+
+		if ( mi->mi_attrs[0]->ai_desc != adv[0] ) {
+			/* count */
+			for ( n = 0; adv[n]; n++ ) ;
+
+			/* insertion sort */
+			for ( i = 0; i < n; i++ ) {
+				AttributeDescription *ad = adv[i];
+				for ( j = i-1; j>=0; j--) {
+					if ( SLAP_PTRCMP( adv[j], ad ) <= 0 ) break;
+					adv[j+1] = adv[j];
+				}
+				adv[j+1] = ad;
+			}
+		}
+
+		for ( i = 0; adv[i]; i++ ) {
+			if ( mi->mi_attrs[i]->ai_desc != adv[i] ) {
+				for ( j = i+1; j < mi->mi_nattrs; j++ ) {
+					if ( mi->mi_attrs[j]->ai_desc == adv[i] ) {
+						AttrInfo *ai = mi->mi_attrs[i];
+						mi->mi_attrs[i] = mi->mi_attrs[j];
+						mi->mi_attrs[j] = ai;
+						break;
+					}
+				}
+				if ( j == mi->mi_nattrs ) {
+					Debug( LDAP_DEBUG_ANY,
+						LDAP_XSTRING(mdb_tool_entry_reindex)
+						": no index configured for %s\n",
+						adv[i]->ad_cname.bv_val, 0, 0 );
+					return -1;
+				}
+			}
+		}
+		mi->mi_nattrs = i;
+	}
+
+	e = mdb_tool_entry_get( be, id );
+
+	if( e == NULL ) {
+		Debug( LDAP_DEBUG_ANY,
+			LDAP_XSTRING(mdb_tool_entry_reindex)
+			": could not locate id=%ld\n",
+			(long) id, 0, 0 );
+		return -1;
+	}
+
+	if ( !txi ) {
+		rc = mdb_txn_begin( mi->mi_dbenv, NULL, 0, &txi );
+		if( rc != 0 ) {
+			Debug( LDAP_DEBUG_ANY,
+				"=> " LDAP_XSTRING(mdb_tool_entry_reindex) ": "
+				"txn_begin failed: %s (%d)\n",
+				mdb_strerror(rc), rc, 0 );
+			goto done;
+		}
+	}
+
+	if ( slapMode & SLAP_TRUNCATE_MODE ) {
+		int i;
+		for ( i=0; i < mi->mi_nattrs; i++ ) {
+			rc = mdb_drop( txi, mi->mi_attrs[i]->ai_dbi, 0 );
+			if ( rc ) {
+				Debug( LDAP_DEBUG_ANY,
+					LDAP_XSTRING(mdb_tool_entry_reindex)
+					": (Truncate) mdb_drop(%s) failed: %s (%d)\n",
+					mi->mi_attrs[i]->ai_desc->ad_type->sat_cname.bv_val,
+					mdb_strerror(rc), rc );
+				return -1;
+			}
+		}
+		slapMode ^= SLAP_TRUNCATE_MODE;
+	}
+
+	/*
+	 * just (re)add them for now
+	 * Use truncate mode to empty/reset index databases
+	 */
+
+	Debug( LDAP_DEBUG_TRACE,
+		"=> " LDAP_XSTRING(mdb_tool_entry_reindex) "( %ld )\n",
+		(long) id, 0, 0 );
+
+	op.o_hdr = &ohdr;
+	op.o_bd = be;
+	op.o_tmpmemctx = NULL;
+	op.o_tmpmfuncs = &ch_mfuncs;
+
+	rc = mdb_tool_index_add( &op, txi, e );
+
+done:
+	if( rc == 0 ) {
+		mdb_writes++;
+		if ( mdb_writes >= mdb_writes_per_commit ) {
+			MDB_val key;
+			unsigned i;
+			MDB_TOOL_IDL_FLUSH( be, txi );
+			rc = mdb_txn_commit( txi );
+			mdb_writes = 0;
+			for ( i=0; i<mi->mi_nattrs; i++ )
+				mi->mi_attrs[i]->ai_cursor = NULL;
+			if( rc != 0 ) {
+				Debug( LDAP_DEBUG_ANY,
+					"=> " LDAP_XSTRING(mdb_tool_entry_reindex)
+					": txn_commit failed: %s (%d)\n",
+					mdb_strerror(rc), rc, 0 );
+				e->e_id = NOID;
+			}
+			mdb_cursor_close( cursor );
+			txi = NULL;
+			/* Must close the read txn to allow old pages to be reclaimed. */
+			mdb_txn_abort( mdb_tool_txn );
+			/* and then reopen it so that tool_entry_next still works. */
+			mdb_txn_begin( mi->mi_dbenv, NULL, MDB_RDONLY, &mdb_tool_txn );
+			mdb_cursor_open( mdb_tool_txn, mi->mi_id2entry, &cursor );
+			key.mv_data = &id;
+			key.mv_size = sizeof(ID);
+			mdb_cursor_get( cursor, &key, NULL, MDB_SET );
+		}
+
+	} else {
+		unsigned i;
+		mdb_writes = 0;
+		mdb_cursor_close( cursor );
+		cursor = NULL;
+		mdb_txn_abort( txi );
+		for ( i=0; i<mi->mi_nattrs; i++ )
+			mi->mi_attrs[i]->ai_cursor = NULL;
+		Debug( LDAP_DEBUG_ANY,
+			"=> " LDAP_XSTRING(mdb_tool_entry_reindex)
+			": txn_aborted! err=%d\n",
+			rc, 0, 0 );
+		e->e_id = NOID;
+		txi = NULL;
+	}
+	mdb_entry_release( &op, e, 0 );
+
+	return rc;
+}
+
+ID mdb_tool_entry_modify(
+	BackendDB *be,
+	Entry *e,
+	struct berval *text )
+{
+	int rc;
+	struct mdb_info *mdb;
+	Operation op = {0};
+	Opheader ohdr = {0};
+
+	assert( be != NULL );
+	assert( slapMode & SLAP_TOOL_MODE );
+
+	assert( text != NULL );
+	assert( text->bv_val != NULL );
+	assert( text->bv_val[0] == '\0' );	/* overconservative? */
+
+	assert ( e->e_id != NOID );
+
+	Debug( LDAP_DEBUG_TRACE,
+		"=> " LDAP_XSTRING(mdb_tool_entry_modify) "( %ld, \"%s\" )\n",
+		(long) e->e_id, e->e_dn, 0 );
+
+	mdb = (struct mdb_info *) be->be_private;
+
+	if( cursor ) {
+		mdb_cursor_close( cursor );
+		cursor = NULL;
+	}
+	if ( !mdb_tool_txn ) {
+		rc = mdb_txn_begin( mdb->mi_dbenv, NULL, 0, &mdb_tool_txn );
+		if( rc != 0 ) {
+			snprintf( text->bv_val, text->bv_len,
+				"txn_begin failed: %s (%d)",
+				mdb_strerror(rc), rc );
+			Debug( LDAP_DEBUG_ANY,
+				"=> " LDAP_XSTRING(mdb_tool_entry_modify) ": %s\n",
+				 text->bv_val, 0, 0 );
+			return NOID;
+		}
+	}
+
+	op.o_hdr = &ohdr;
+	op.o_bd = be;
+	op.o_tmpmemctx = NULL;
+	op.o_tmpmfuncs = &ch_mfuncs;
+
+	/* id2entry index */
+	rc = mdb_id2entry_update( &op, mdb_tool_txn, NULL, e );
+	if( rc != 0 ) {
+		snprintf( text->bv_val, text->bv_len,
+				"id2entry_update failed: err=%d", rc );
+		Debug( LDAP_DEBUG_ANY,
+			"=> " LDAP_XSTRING(mdb_tool_entry_modify) ": %s\n",
+			text->bv_val, 0, 0 );
+		goto done;
+	}
+
+done:
+	if( rc == 0 ) {
+		rc = mdb_txn_commit( mdb_tool_txn );
+		if( rc != 0 ) {
+			mdb->mi_numads = 0;
+			snprintf( text->bv_val, text->bv_len,
+					"txn_commit failed: %s (%d)",
+					mdb_strerror(rc), rc );
+			Debug( LDAP_DEBUG_ANY,
+				"=> " LDAP_XSTRING(mdb_tool_entry_modify) ": "
+				"%s\n", text->bv_val, 0, 0 );
+			e->e_id = NOID;
+		}
+
+	} else {
+		mdb_txn_abort( mdb_tool_txn );
+		snprintf( text->bv_val, text->bv_len,
+			"txn_aborted! %s (%d)",
+			mdb_strerror(rc), rc );
+		Debug( LDAP_DEBUG_ANY,
+			"=> " LDAP_XSTRING(mdb_tool_entry_modify) ": %s\n",
+			text->bv_val, 0, 0 );
+		e->e_id = NOID;
+	}
+	mdb_tool_txn = NULL;
+	idcursor = NULL;
+
+	return e->e_id;
+}
+
+static void *
+mdb_tool_index_task( void *ctx, void *ptr )
+{
+	int base = *(int *)ptr;
+
+	free( ptr );
+	while ( 1 ) {
+		ldap_pvt_thread_mutex_lock( &mdb_tool_index_mutex );
+		mdb_tool_index_tcount--;
+		if ( !mdb_tool_index_tcount )
+			ldap_pvt_thread_cond_signal( &mdb_tool_index_cond_main );
+		ldap_pvt_thread_cond_wait( &mdb_tool_index_cond_work,
+			&mdb_tool_index_mutex );
+		if ( slapd_shutdown ) {
+			mdb_tool_index_tcount--;
+			if ( !mdb_tool_index_tcount )
+				ldap_pvt_thread_cond_signal( &mdb_tool_index_cond_main );
+			ldap_pvt_thread_mutex_unlock( &mdb_tool_index_mutex );
+			break;
+		}
+		ldap_pvt_thread_mutex_unlock( &mdb_tool_index_mutex );
+		mdb_tool_index_rec[base].ir_i = mdb_index_recrun( mdb_tool_ix_op,
+			mdb_tool_ix_txn,
+			mdb_tool_info, mdb_tool_index_rec, mdb_tool_ix_id, base );
+	}
+
+	return NULL;
+}
+
+#ifdef MDB_TOOL_IDL_CACHING
+static int
+mdb_tool_idl_cmp( const void *v1, const void *v2 )
+{
+	const mdb_tool_idl_cache *c1 = v1, *c2 = v2;
+	int rc;
+
+	if (( rc = c1->kstr.bv_len - c2->kstr.bv_len )) return rc;
+	return memcmp( c1->kstr.bv_val, c2->kstr.bv_val, c1->kstr.bv_len );
+}
+
+static int
+mdb_tool_idl_flush_one( MDB_cursor *mc, AttrInfo *ai, mdb_tool_idl_cache *ic )
+{
+	mdb_tool_idl_cache_entry *ice;
+	MDB_val key, data[2];
+	int i, rc;
+	ID id, nid;
+
+	/* Freshly allocated, ignore it */
+	if ( !ic->head && ic->count <= MDB_IDL_DB_SIZE ) {
+		return 0;
+	}
+
+	key.mv_data = ic->kstr.bv_val;
+	key.mv_size = ic->kstr.bv_len;
+
+	if ( ic->count > MDB_IDL_DB_SIZE ) {
+		while ( ic->flags & WAS_FOUND ) {
+			rc = mdb_cursor_get( mc, &key, data, MDB_SET );
+			if ( rc ) {
+				/* FIXME: find out why this happens */
+				ic->flags = 0;
+				break;
+			}
+			if ( ic->flags & WAS_RANGE ) {
+				/* Skip lo */
+				rc = mdb_cursor_get( mc, &key, data, MDB_NEXT_DUP );
+
+				/* Get hi */
+				rc = mdb_cursor_get( mc, &key, data, MDB_NEXT_DUP );
+
+				/* Store range hi */
+				data[0].mv_data = &ic->last;
+				rc = mdb_cursor_put( mc, &key, data, MDB_CURRENT );
+			} else {
+				/* Delete old data, replace with range */
+				ic->first = *(ID *)data[0].mv_data;
+				mdb_cursor_del( mc, MDB_NODUPDATA );
+			}
+			break;
+		}
+		if ( !(ic->flags & WAS_RANGE)) {
+			/* range, didn't exist before */
+			nid = 0;
+			data[0].mv_size = sizeof(ID);
+			data[0].mv_data = &nid;
+			rc = mdb_cursor_put( mc, &key, data, 0 );
+			if ( rc == 0 ) {
+				data[0].mv_data = &ic->first;
+				rc = mdb_cursor_put( mc, &key, data, 0 );
+				if ( rc == 0 ) {
+					data[0].mv_data = &ic->last;
+					rc = mdb_cursor_put( mc, &key, data, 0 );
+				}
+			}
+			if ( rc ) {
+				rc = -1;
+			}
+		}
+	} else {
+		/* Normal write */
+		int n;
+
+		data[0].mv_size = sizeof(ID);
+		rc = 0;
+		i = ic->offset;
+		for ( ice = ic->head, n=0; ice; ice = ice->next, n++ ) {
+			int end;
+			if ( ice->next ) {
+				end = IDBLOCK;
+			} else {
+				end = ic->count & (IDBLOCK-1);
+				if ( !end )
+					end = IDBLOCK;
+			}
+			data[1].mv_size = end - i;
+			data[0].mv_data = &ice->ids[i];
+			i = 0;
+			rc = mdb_cursor_put( mc, &key, data, MDB_NODUPDATA|MDB_APPEND|MDB_MULTIPLE );
+			if ( rc ) {
+				if ( rc == MDB_KEYEXIST ) {
+					rc = 0;
+					continue;
+				}
+				rc = -1;
+				break;
+			}
+		}
+		if ( ic->head ) {
+			ic->tail->next = ai->ai_flist;
+			ai->ai_flist = ic->head;
+		}
+	}
+	ic->head = ai->ai_clist;
+	ai->ai_clist = ic;
+	return rc;
+}
+
+static int
+mdb_tool_idl_flush_db( MDB_txn *txn, AttrInfo *ai )
+{
+	MDB_cursor *mc;
+	Avlnode *root;
+	int rc;
+
+	mdb_cursor_open( txn, ai->ai_dbi, &mc );
+	root = tavl_end( ai->ai_root, TAVL_DIR_LEFT );
+	do {
+		rc = mdb_tool_idl_flush_one( mc, ai, root->avl_data );
+		if ( rc != -1 )
+			rc = 0;
+	} while ((root = tavl_next(root, TAVL_DIR_RIGHT)));
+	mdb_cursor_close( mc );
+
+	return rc;
+}
+
+static int
+mdb_tool_idl_flush( BackendDB *be, MDB_txn *txn )
+{
+	struct mdb_info *mdb = (struct mdb_info *) be->be_private;
+	int rc = 0;
+	unsigned int i, dbi;
+
+	for ( i=0; i < mdb->mi_nattrs; i++ ) {
+		if ( !mdb->mi_attrs[i]->ai_root ) continue;
+		rc = mdb_tool_idl_flush_db( txn, mdb->mi_attrs[i] );
+		tavl_free(mdb->mi_attrs[i]->ai_root, NULL);
+		mdb->mi_attrs[i]->ai_root = NULL;
+		if ( rc )
+			break;
+	}
+	return rc;
+}
+
+int mdb_tool_idl_add(
+	BackendDB *be,
+	MDB_cursor *mc,
+	struct berval *keys,
+	ID id )
+{
+	MDB_dbi dbi;
+	mdb_tool_idl_cache *ic, itmp;
+	mdb_tool_idl_cache_entry *ice;
+	int i, rc, lcount;
+	AttrInfo *ai = (AttrInfo *)mc;
+	mc = ai->ai_cursor;
+
+	dbi = ai->ai_dbi;
+	for (i=0; keys[i].bv_val; i++) {
+	itmp.kstr = keys[i];
+	ic = tavl_find( (Avlnode *)ai->ai_root, &itmp, mdb_tool_idl_cmp );
+
+	/* No entry yet, create one */
+	if ( !ic ) {
+		MDB_val key, data;
+		ID nid;
+		int rc;
+
+		if ( ai->ai_clist ) {
+			ic = ai->ai_clist;
+			ai->ai_clist = ic->head;
+		} else {
+			ic = ch_malloc( sizeof( mdb_tool_idl_cache ) + itmp.kstr.bv_len + 4 );
+		}
+		ic->kstr.bv_len = itmp.kstr.bv_len;
+		ic->kstr.bv_val = (char *)(ic+1);
+		memcpy( ic->kstr.bv_val, itmp.kstr.bv_val, ic->kstr.bv_len );
+		ic->head = ic->tail = NULL;
+		ic->last = 0;
+		ic->count = 0;
+		ic->offset = 0;
+		ic->flags = 0;
+		tavl_insert( (Avlnode **)&ai->ai_root, ic, mdb_tool_idl_cmp,
+			avl_dup_error );
+
+		/* load existing key count here */
+		key.mv_size = keys[i].bv_len;
+		key.mv_data = keys[i].bv_val;
+		rc = mdb_cursor_get( mc, &key, &data, MDB_SET );
+		if ( rc == 0 ) {
+			ic->flags |= WAS_FOUND;
+			nid = *(ID *)data.mv_data;
+			if ( nid == 0 ) {
+				ic->count = MDB_IDL_DB_SIZE+1;
+				ic->flags |= WAS_RANGE;
+			} else {
+				size_t count;
+
+				mdb_cursor_count( mc, &count );
+				ic->count = count;
+				ic->first = nid;
+				ic->offset = count & (IDBLOCK-1);
+			}
+		}
+	}
+	/* are we a range already? */
+	if ( ic->count > MDB_IDL_DB_SIZE ) {
+		ic->last = id;
+		continue;
+	/* Are we at the limit, and converting to a range? */
+	} else if ( ic->count == MDB_IDL_DB_SIZE ) {
+		if ( ic->head ) {
+			ic->tail->next = ai->ai_flist;
+			ai->ai_flist = ic->head;
+		}
+		ic->head = ic->tail = NULL;
+		ic->last = id;
+		ic->count++;
+		continue;
+	}
+	/* No free block, create that too */
+	lcount = ic->count & (IDBLOCK-1);
+	if ( !ic->tail || lcount == 0) {
+		if ( ai->ai_flist ) {
+			ice = ai->ai_flist;
+			ai->ai_flist = ice->next;
+		} else {
+			ice = ch_malloc( sizeof( mdb_tool_idl_cache_entry ));
+		}
+		ice->next = NULL;
+		if ( !ic->head ) {
+			ic->head = ice;
+		} else {
+			ic->tail->next = ice;
+		}
+		ic->tail = ice;
+		if ( lcount )
+			ice->ids[lcount-1] = 0;
+		if ( !ic->count )
+			ic->first = id;
+	}
+	ice = ic->tail;
+	if (!lcount || ice->ids[lcount-1] != id)
+		ice->ids[lcount] = id;
+	ic->count++;
+	}
+
+	return 0;
+}
+#endif /* MDB_TOOL_IDL_CACHING */
+
+/* Upgrade from pre 2.4.34 dn2id format */
+
+#include <ac/unistd.h>
+#include <lutil_meter.h>
+
+#define STACKSIZ	2048
+
+typedef struct rec {
+	ID id;
+	size_t len;
+	char rdn[512];
+} rec;
+
+static int
+mdb_dn2id_upgrade( BackendDB *be ) {
+	struct mdb_info *mi = (struct mdb_info *) be->be_private;
+	MDB_txn *mt;
+	MDB_cursor *mc = NULL;
+	MDB_val key, data;
+	int rc, writes=0, depth=0;
+	int enable_meter = 0;
+	ID id = 0, *num, count = 0;
+	rec *stack;
+	lutil_meter_t meter;
+
+	if (!(mi->mi_flags & MDB_NEED_UPGRADE)) {
+		Debug( LDAP_DEBUG_ANY, "database %s: No upgrade needed.\n",
+			be->be_suffix[0].bv_val, 0, 0 );
+		return 0;
+	}
+
+	{
+		MDB_stat st;
+
+		mdb_stat(mdb_cursor_txn(cursor), mi->mi_dbis[MDB_ID2ENTRY], &st);
+		if (!st.ms_entries) {
+			/* Empty DB, nothing to upgrade? */
+			return 0;
+		}
+		if (isatty(2))
+			enable_meter = !lutil_meter_open(&meter,
+				&lutil_meter_text_display,
+				&lutil_meter_linear_estimator,
+				st.ms_entries);
+	}
+
+	num = ch_malloc(STACKSIZ * (sizeof(ID) + sizeof(rec)));
+	stack = (rec *)(num + STACKSIZ);
+
+	rc = mdb_txn_begin(mi->mi_dbenv, NULL, 0, &mt);
+	if (rc) {
+		Debug(LDAP_DEBUG_ANY, "mdb_dn2id_upgrade: mdb_txn_begin failed, %s (%d)\n",
+			mdb_strerror(rc), rc, 0 );
+		goto leave;
+	}
+	rc = mdb_cursor_open(mt, mi->mi_dbis[MDB_DN2ID], &mc);
+	if (rc) {
+		Debug(LDAP_DEBUG_ANY, "mdb_dn2id_upgrade: mdb_cursor_open failed, %s (%d)\n",
+			mdb_strerror(rc), rc, 0 );
+		goto leave;
+	}
+
+	key.mv_size = sizeof(ID);
+	/* post-order depth-first update */
+	for(;;) {
+		size_t dkids;
+		unsigned char *ptr;
+
+		/* visit */
+		key.mv_data = &id;
+		stack[depth].id = id;
+		rc = mdb_cursor_get(mc, &key, &data, MDB_SET);
+		if (rc) {
+			Debug(LDAP_DEBUG_ANY, "mdb_dn2id_upgrade: mdb_cursor_get failed, %s (%d)\n",
+				mdb_strerror(rc), rc, 0 );
+			goto leave;
+		}
+		num[depth] = 1;
+
+		rc = mdb_cursor_count(mc, &dkids);
+		if (rc) {
+			Debug(LDAP_DEBUG_ANY, "mdb_dn2id_upgrade: mdb_cursor_count failed, %s (%d)\n",
+				mdb_strerror(rc), rc, 0 );
+			goto leave;
+		}
+		if (dkids > 1) {
+			rc = mdb_cursor_get(mc, &key, &data, MDB_NEXT_DUP);
+down:
+			ptr = (unsigned char *)data.mv_data + data.mv_size - sizeof(ID);
+			memcpy(&id, ptr, sizeof(ID));
+			depth++;
+			memcpy(stack[depth].rdn, data.mv_data, data.mv_size);
+			stack[depth].len = data.mv_size;
+			continue;
+		}
+
+
+		/* pop: write updated count, advance to next node */
+pop:
+		/* update superior counts */
+		if (depth)
+			num[depth-1] += num[depth];
+
+		key.mv_data = &id;
+		id = stack[depth-1].id;
+		data.mv_data = stack[depth].rdn;
+		data.mv_size = stack[depth].len;
+		rc = mdb_cursor_get(mc, &key, &data, MDB_GET_BOTH);
+		if (rc) {
+			Debug(LDAP_DEBUG_ANY, "mdb_dn2id_upgrade: mdb_cursor_get(BOTH) failed, %s (%d)\n",
+				mdb_strerror(rc), rc, 0 );
+			goto leave;
+		}
+		data.mv_data = stack[depth].rdn;
+		ptr = (unsigned char *)data.mv_data + data.mv_size;
+		memcpy(ptr, &num[depth], sizeof(ID));
+		data.mv_size += sizeof(ID);
+		rc = mdb_cursor_del(mc, 0);
+		if (rc) {
+			Debug(LDAP_DEBUG_ANY, "mdb_dn2id_upgrade: mdb_cursor_del failed, %s (%d)\n",
+				mdb_strerror(rc), rc, 0 );
+			goto leave;
+		}
+		rc = mdb_cursor_put(mc, &key, &data, 0);
+		if (rc) {
+			Debug(LDAP_DEBUG_ANY, "mdb_dn2id_upgrade: mdb_cursor_put failed, %s (%d)\n",
+				mdb_strerror(rc), rc, 0 );
+			goto leave;
+		}
+		count++;
+#if 1
+		if (enable_meter)
+			lutil_meter_update(&meter, count, 0);
+#else
+		{
+			int len;
+			ptr = data.mv_data;
+			len = (ptr[0] & 0x7f) << 8 | ptr[1];
+			printf("ID: %zu, %zu, %.*s\n", stack[depth].id, num[depth], len, ptr+2);
+		}
+#endif
+		writes++;
+		if (writes == 1000) {
+			mdb_cursor_close(mc);
+			rc = mdb_txn_commit(mt);
+			if (rc) {
+				Debug(LDAP_DEBUG_ANY, "mdb_dn2id_upgrade: mdb_txn_commit failed, %s (%d)\n",
+					mdb_strerror(rc), rc, 0 );
+				goto leave;
+			}
+			rc = mdb_txn_begin(mi->mi_dbenv, NULL, 0, &mt);
+			if (rc) {
+				Debug(LDAP_DEBUG_ANY, "mdb_dn2id_upgrade: mdb_txn_begin(2) failed, %s (%d)\n",
+					mdb_strerror(rc), rc, 0 );
+				goto leave;
+			}
+			rc = mdb_cursor_open(mt, mi->mi_dbis[MDB_DN2ID], &mc);
+			if (rc) {
+				Debug(LDAP_DEBUG_ANY, "mdb_dn2id_upgrade: mdb_cursor_open(2) failed, %s (%d)\n",
+					mdb_strerror(rc), rc, 0 );
+				goto leave;
+			}
+			rc = mdb_cursor_get(mc, &key, &data, MDB_GET_BOTH);
+			if (rc) {
+				Debug(LDAP_DEBUG_ANY, "mdb_dn2id_upgrade: mdb_cursor_get(2) failed, %s (%d)\n",
+					mdb_strerror(rc), rc, 0 );
+				goto leave;
+			}
+			writes = 0;
+		}
+		depth--;
+
+		rc = mdb_cursor_get(mc, &key, &data, MDB_NEXT_DUP);
+		if (rc == 0)
+			goto down;
+		rc = 0;
+		if (depth)
+			goto pop;
+		else
+			break;
+	}
+leave:
+	mdb_cursor_close(mc);
+	if (mt) {
+		int r2;
+		r2 = mdb_txn_commit(mt);
+		if (r2) {
+			Debug(LDAP_DEBUG_ANY, "mdb_dn2id_upgrade: mdb_txn_commit(2) failed, %s (%d)\n",
+				mdb_strerror(r2), r2, 0 );
+			if (!rc)
+				rc = r2;
+		}
+	}
+	ch_free(num);
+	if (enable_meter) {
+		lutil_meter_update(&meter, count, 1);
+		lutil_meter_close(&meter);
+	}
+	return rc;
+}