]> git.sur5r.net Git - openldap/blobdiff - servers/slapd/back-monitor/init.c
fix zeroing out attribute values (should fix ITS#5311)
[openldap] / servers / slapd / back-monitor / init.c
index 26d7d5edf4ca591935d78b02ed74ab0fb80162fd..1f82cfa9a411442d9ff3a961f397f33f8240b6e1 100644 (file)
@@ -2,7 +2,7 @@
 /* $OpenLDAP$ */
 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
  *
- * Copyright 2001-2006 The OpenLDAP Foundation.
+ * Copyright 2001-2008 The OpenLDAP Foundation.
  * Portions Copyright 2001-2003 Pierangelo Masarati.
  * All rights reserved.
  *
@@ -30,6 +30,8 @@
 #include "lber_pvt.h"
 #include "back-monitor.h"
 
+#include "config.h"
+
 #undef INTEGRATE_CORE_SCHEMA
 
 /*
@@ -44,6 +46,27 @@ BackendDB                    *be_monitor;
 static struct monitor_subsys_t **monitor_subsys;
 static int                     monitor_subsys_opened;
 static monitor_info_t          monitor_info;
+static const monitor_extra_t monitor_extra = {
+       monitor_back_is_configured,
+       monitor_back_get_subsys,
+       monitor_back_get_subsys_by_dn,
+
+       monitor_back_register_subsys,
+       monitor_back_register_backend,
+       monitor_back_register_database,
+       monitor_back_register_overlay_info,
+       monitor_back_register_overlay,
+       monitor_back_register_entry,
+       monitor_back_register_entry_parent,
+       monitor_back_register_entry_attrs,
+       monitor_back_register_entry_callback,
+
+       monitor_back_unregister_entry,
+       monitor_back_unregister_entry_parent,
+       monitor_back_unregister_entry_attrs,
+       monitor_back_unregister_entry_callback
+};
+       
 
 /*
  * subsystem data
@@ -202,6 +225,12 @@ static struct monitor_subsys_t known_monitor_subsys[] = {
                }, { NULL }
 };
 
+int
+monitor_subsys_is_opened( void )
+{
+       return monitor_subsys_opened;
+}
+
 int
 monitor_back_register_subsys(
        monitor_subsys_t        *ms )
@@ -226,7 +255,7 @@ monitor_back_register_subsys(
        /* if a subsystem is registered __AFTER__ subsystem 
         * initialization (depending on the sequence the databases
         * are listed in slapd.conf), init it */
-       if ( monitor_subsys_opened ) {
+       if ( monitor_subsys_is_opened() ) {
 
                /* FIXME: this should only be possible
                 * if be_monitor is already initialized */
@@ -246,18 +275,29 @@ enum {
        LIMBO_ENTRY,
        LIMBO_ENTRY_PARENT,
        LIMBO_ATTRS,
-       LIMBO_CB
+       LIMBO_CB,
+       LIMBO_BACKEND,
+       LIMBO_DATABASE,
+       LIMBO_OVERLAY_INFO,
+       LIMBO_OVERLAY,
+
+       LIMBO_LAST
 };
 
 typedef struct entry_limbo_t {
        int                     el_type;
+       BackendInfo             *el_bi;
+       BackendDB               *el_be;
+       slap_overinst           *el_on;
        Entry                   *el_e;
        Attribute               *el_a;
-       struct berval           el_ndn;
-       struct berval           el_base;
+       struct berval           *el_ndn;
+       struct berval           el_nbase;
        int                     el_scope;
        struct berval           el_filter;
        monitor_callback_t      *el_cb;
+       monitor_subsys_t        *el_mss;
+       unsigned long           el_flags;
        struct entry_limbo_t    *el_next;
 } entry_limbo_t;
 
@@ -267,10 +307,91 @@ monitor_back_is_configured( void )
        return be_monitor != NULL;
 }
 
+int
+monitor_back_register_backend(
+       BackendInfo             *bi )
+{
+       return -1;
+}
+
+int
+monitor_back_register_overlay_info(
+       slap_overinst           *on )
+{
+       return -1;
+}
+
+int
+monitor_back_register_overlay(
+       BackendDB               *be )
+{
+       return -1;
+}
+
+int
+monitor_back_register_backend_limbo(
+       BackendInfo             *bi )
+{
+       return -1;
+}
+
+int
+monitor_back_register_database_limbo(
+       BackendDB               *be,
+       struct berval   *ndn )
+{
+       entry_limbo_t   **elpp, el = { 0 };
+       monitor_info_t  *mi;
+
+       if ( be_monitor == NULL ) {
+               Debug( LDAP_DEBUG_ANY,
+                       "monitor_back_register_database_limbo: "
+                       "monitor database not configured.\n",
+                       0, 0, 0 );
+               return -1;
+       }
+
+       mi = ( monitor_info_t * )be_monitor->be_private;
+
+
+       el.el_type = LIMBO_DATABASE;
+
+       el.el_be = be;
+       el.el_ndn = ndn;
+       
+       for ( elpp = &mi->mi_entry_limbo;
+                       *elpp;
+                       elpp = &(*elpp)->el_next )
+               /* go to last */;
+
+       *elpp = (entry_limbo_t *)ch_malloc( sizeof( entry_limbo_t ) );
+
+       el.el_next = NULL;
+       **elpp = el;
+
+       return 0;
+}
+
+int
+monitor_back_register_overlay_info_limbo(
+       slap_overinst           *on )
+{
+       return -1;
+}
+
+int
+monitor_back_register_overlay_limbo(
+       BackendDB               *be )
+{
+       return -1;
+}
+
 int
 monitor_back_register_entry(
        Entry                   *e,
-       monitor_callback_t      *cb )
+       monitor_callback_t      *cb,
+       monitor_subsys_t        *mss,
+       unsigned long           flags )
 {
        monitor_info_t  *mi;
 
@@ -288,7 +409,7 @@ monitor_back_register_entry(
        assert( e != NULL );
        assert( e->e_private == NULL );
        
-       if ( monitor_subsys_opened ) {
+       if ( monitor_subsys_is_opened() ) {
                Entry           *e_parent = NULL,
                                *e_new = NULL,
                                **ep = NULL;
@@ -351,8 +472,14 @@ monitor_back_register_entry(
                }
                
                e_new->e_private = ( void * )mp;
-               mp->mp_info = mp_parent->mp_info;
-               mp->mp_flags = mp_parent->mp_flags | MONITOR_F_SUB;
+               if ( mss != NULL ) {
+                       mp->mp_info = mss;
+                       mp->mp_flags = flags;
+
+               } else {
+                       mp->mp_info = mp_parent->mp_info;
+                       mp->mp_flags = mp_parent->mp_flags | MONITOR_F_SUB;
+               }
                mp->mp_cb = cb;
 
                ep = &mp_parent->mp_children;
@@ -401,8 +528,10 @@ done:;
                }
                
                el.el_cb = cb;
+               el.el_mss = mss;
+               el.el_flags = flags;
 
-               for ( elpp = (entry_limbo_t **)&mi->mi_entry_limbo;
+               for ( elpp = &mi->mi_entry_limbo;
                                *elpp;
                                elpp = &(*elpp)->el_next )
                        /* go to last */;
@@ -425,7 +554,9 @@ int
 monitor_back_register_entry_parent(
        Entry                   *e,
        monitor_callback_t      *cb,
-       struct berval           *base,
+       monitor_subsys_t        *mss,
+       unsigned long           flags,
+       struct berval           *nbase,
        int                     scope,
        struct berval           *filter )
 {
@@ -436,7 +567,7 @@ monitor_back_register_entry_parent(
                Debug( LDAP_DEBUG_ANY,
                        "monitor_back_register_entry_parent(base=\"%s\" scope=%s filter=\"%s\"): "
                        "monitor database not configured.\n",
-                       BER_BVISNULL( base ) ? "" : base->bv_val,
+                       BER_BVISNULL( nbase ) ? "" : nbase->bv_val,
                        ldap_pvt_scope2str( scope ),
                        BER_BVISNULL( filter ) ? "" : filter->bv_val );
                return -1;
@@ -457,7 +588,7 @@ monitor_back_register_entry_parent(
                return -1;
        }
 
-       if ( monitor_subsys_opened ) {
+       if ( monitor_subsys_is_opened() ) {
                Entry           *e_parent = NULL,
                                *e_new = NULL,
                                **ep = NULL;
@@ -467,14 +598,15 @@ monitor_back_register_entry_parent(
                                *mp_parent = NULL;
                int             rc = 0;
 
-               if ( monitor_filter2ndn( base, scope, filter, &ndn ) ) {
+               if ( monitor_search2ndn( nbase, scope, filter, &ndn ) ) {
                        /* entry does not exist */
                        Debug( LDAP_DEBUG_ANY,
                                "monitor_back_register_entry_parent(\"\"): "
-                               "base=\"%s\" scope=%d filter=\"%s\": "
+                               "base=\"%s\" scope=%s filter=\"%s\": "
                                "unable to find entry\n",
-                               base->bv_val ? base->bv_val : "\"\"",
-                               scope, filter->bv_val );
+                               nbase->bv_val ? nbase->bv_val : "\"\"",
+                               ldap_pvt_scope2str( scope ),
+                               filter->bv_val );
                        return -1;
                }
 
@@ -511,6 +643,7 @@ monitor_back_register_entry_parent(
                                "entry already exists\n",
                                e_name.bv_val, 0, 0 );
                        monitor_cache_release( mi, e_new );
+                       e_new = NULL;
                        rc = -1;
                        goto done;
                }
@@ -540,8 +673,14 @@ monitor_back_register_entry_parent(
                e_new->e_nname = e_nname;
                
                e_new->e_private = ( void * )mp;
-               mp->mp_info = mp_parent->mp_info;
-               mp->mp_flags = mp_parent->mp_flags | MONITOR_F_SUB;
+               if ( mss != NULL ) {
+                       mp->mp_info = mss;
+                       mp->mp_flags = flags;
+
+               } else {
+                       mp->mp_info = mp_parent->mp_info;
+                       mp->mp_flags = mp_parent->mp_flags | MONITOR_F_SUB;
+               }
                mp->mp_cb = cb;
 
                ep = &mp_parent->mp_children;
@@ -580,7 +719,7 @@ done:;
                }
 
        } else {
-               entry_limbo_t   **elpp, el = { 0 };
+               entry_limbo_t   **elpp = NULL, el = { 0 };
 
                el.el_type = LIMBO_ENTRY_PARENT;
 
@@ -590,43 +729,64 @@ done:;
                                "monitor_back_register_entry(\"%s\"): "
                                "entry_dup() failed\n",
                                e->e_name.bv_val, 0, 0 );
-                       return -1;
+                       goto done_limbo;
                }
                
-               if ( !BER_BVISNULL( base ) ) {
-                       ber_dupbv( &el.el_base, base );
+               if ( !BER_BVISNULL( nbase ) ) {
+                       ber_dupbv( &el.el_nbase, nbase );
                }
+
                el.el_scope = scope;
                if ( !BER_BVISNULL( filter ) ) {
-                       ber_dupbv( &el.el_filter, filter );
+                       ber_dupbv( &el.el_filter, filter  );
                }
 
                el.el_cb = cb;
+               el.el_mss = mss;
+               el.el_flags = flags;
 
-               for ( elpp = (entry_limbo_t **)&mi->mi_entry_limbo;
+               for ( elpp = &mi->mi_entry_limbo;
                                *elpp;
                                elpp = &(*elpp)->el_next )
                        /* go to last */;
 
                *elpp = (entry_limbo_t *)ch_malloc( sizeof( entry_limbo_t ) );
                if ( *elpp == NULL ) {
-                       el.el_e->e_private = NULL;
+                       goto done_limbo;
+               }
+
+done_limbo:;
+               if ( *elpp != NULL ) {
+                       el.el_next = NULL;
+                       **elpp = el;
+
+               } else {
+                       if ( !BER_BVISNULL( &el.el_filter ) ) {
+                               ch_free( el.el_filter.bv_val );
+                       }
+                       if ( !BER_BVISNULL( &el.el_nbase ) ) {
+                               ch_free( el.el_nbase.bv_val );
+                       }
                        entry_free( el.el_e );
                        return -1;
                }
-
-               el.el_next = NULL;
-               **elpp = el;
        }
 
        return 0;
 }
 
 static int
-monitor_filter2ndn_cb( Operation *op, SlapReply *rs )
+monitor_search2ndn_cb( Operation *op, SlapReply *rs )
 {
        if ( rs->sr_type == REP_SEARCH ) {
                struct berval   *ndn = op->o_callback->sc_private;
+
+               if ( !BER_BVISNULL( ndn ) ) {
+                       rs->sr_err = LDAP_SIZELIMIT_EXCEEDED;
+                       ch_free( ndn->bv_val );
+                       BER_BVZERO( ndn );
+                       return rs->sr_err;
+               }
                
                ber_dupbv( ndn, &rs->sr_entry->e_nname );
        }
@@ -635,8 +795,8 @@ monitor_filter2ndn_cb( Operation *op, SlapReply *rs )
 }
 
 int
-monitor_filter2ndn(
-       struct berval   *base,
+monitor_search2ndn(
+       struct berval   *nbase,
        int             scope,
        struct berval   *filter,
        struct berval   *ndn )
@@ -644,8 +804,9 @@ monitor_filter2ndn(
        Connection      conn = { 0 };
        OperationBuffer opbuf;
        Operation       *op;
+       void    *thrctx;
        SlapReply       rs = { 0 };
-       slap_callback   cb = { NULL, monitor_filter2ndn_cb, NULL, NULL };
+       slap_callback   cb = { NULL, monitor_search2ndn_cb, NULL, NULL };
        int             rc;
 
        BER_BVZERO( ndn );
@@ -654,28 +815,27 @@ monitor_filter2ndn(
                return -1;
        }
 
-       op = (Operation *) &opbuf;
-       connection_fake_init( &conn, op, &conn );
+       thrctx = ldap_pvt_thread_pool_context();
+       connection_fake_init( &conn, &opbuf, thrctx );
+       op = &opbuf.ob_op;
 
        op->o_tag = LDAP_REQ_SEARCH;
 
        /* use global malloc for now */
        if ( op->o_tmpmemctx ) {
-               /* FIXME: connection_fake_init() calls slap_sl_mem_create, so we destroy it for now */
-               slap_sl_mem_destroy( NULL, op->o_tmpmemctx );
                op->o_tmpmemctx = NULL;
        }
        op->o_tmpmfuncs = &ch_mfuncs;
 
        op->o_bd = be_monitor;
-       if ( base == NULL || BER_BVISNULL( base ) ) {
+       if ( nbase == NULL || BER_BVISNULL( nbase ) ) {
                ber_dupbv_x( &op->o_req_dn, &op->o_bd->be_suffix[ 0 ],
                                op->o_tmpmemctx );
                ber_dupbv_x( &op->o_req_ndn, &op->o_bd->be_nsuffix[ 0 ],
                                op->o_tmpmemctx );
 
        } else {
-               if ( dnPrettyNormal( NULL, base, &op->o_req_dn, &op->o_req_ndn,
+               if ( dnPrettyNormal( NULL, nbase, &op->o_req_dn, &op->o_req_ndn,
                                        op->o_tmpmemctx ) ) {
                        return -1;
                }
@@ -685,8 +845,12 @@ monitor_filter2ndn(
        cb.sc_private = (void *)ndn;
 
        op->ors_scope = scope;
-       ber_dupbv_x( &op->ors_filterstr, filter, op->o_tmpmemctx );
        op->ors_filter = str2filter_x( op, filter->bv_val );
+       if ( op->ors_filter == NULL ) {
+               rc = LDAP_OTHER;
+               goto cleanup;
+       }
+       ber_dupbv_x( &op->ors_filterstr, filter, op->o_tmpmemctx );
        op->ors_attrs = slap_anlist_no_attrs;
        op->ors_attrsonly = 0;
        op->ors_tlimit = SLAP_NO_LIMIT;
@@ -702,10 +866,19 @@ monitor_filter2ndn(
 
        rc = op->o_bd->be_search( op, &rs );
 
-       filter_free_x( op, op->ors_filter );
-       op->o_tmpfree( op->ors_filterstr.bv_val, op->o_tmpmemctx );
-       op->o_tmpfree( op->o_req_dn.bv_val, op->o_tmpmemctx );
-       op->o_tmpfree( op->o_req_ndn.bv_val, op->o_tmpmemctx );
+cleanup:;
+       if ( op->ors_filter != NULL ) {
+               filter_free_x( op, op->ors_filter );
+       }
+       if ( !BER_BVISNULL( &op->ors_filterstr ) ) {
+               op->o_tmpfree( op->ors_filterstr.bv_val, op->o_tmpmemctx );
+       }
+       if ( !BER_BVISNULL( &op->o_req_dn ) ) {
+               op->o_tmpfree( op->o_req_dn.bv_val, op->o_tmpmemctx );
+       }
+       if ( !BER_BVISNULL( &op->o_req_ndn ) ) {
+               op->o_tmpfree( op->o_req_ndn.bv_val, op->o_tmpmemctx );
+       }
 
        if ( rc != 0 ) {
                return rc;
@@ -736,7 +909,7 @@ monitor_back_register_entry_attrs(
        struct berval           *ndn_in,
        Attribute               *a,
        monitor_callback_t      *cb,
-       struct berval           *base,
+       struct berval           *nbase,
        int                     scope,
        struct berval           *filter )
 {
@@ -751,7 +924,7 @@ monitor_back_register_entry_attrs(
                        "monitor_back_register_entry_%s(base=\"%s\" scope=%s filter=\"%s\"): "
                        "monitor database not configured.\n",
                        fname,
-                       BER_BVISNULL( base ) ? "" : base->bv_val,
+                       BER_BVISNULL( nbase ) ? "" : nbase->bv_val,
                        ldap_pvt_scope2str( scope ),
                        BER_BVISNULL( filter ) ? "" : filter->bv_val );
                Debug( LDAP_DEBUG_ANY, "%s\n", buf, 0, 0 );
@@ -783,7 +956,7 @@ monitor_back_register_entry_attrs(
                return -1;
        }
 
-       if ( monitor_subsys_opened ) {
+       if ( monitor_subsys_is_opened() ) {
                Entry                   *e = NULL;
                Attribute               **atp = NULL;
                monitor_entry_t         *mp = NULL;
@@ -792,16 +965,17 @@ monitor_back_register_entry_attrs(
                int                     freeit = 0;
 
                if ( BER_BVISNULL( &ndn ) ) {
-                       if ( monitor_filter2ndn( base, scope, filter, &ndn ) ) {
+                       if ( monitor_search2ndn( nbase, scope, filter, &ndn ) ) {
                                char            buf[ SLAP_TEXT_BUFLEN ];
 
                                snprintf( buf, sizeof( buf ),
                                        "monitor_back_register_entry_%s(\"\"): "
-                                       "base=\"%s\" scope=%d filter=\"%s\": "
+                                       "base=\"%s\" scope=%s filter=\"%s\": "
                                        "unable to find entry\n",
                                        fname,
-                                       base->bv_val ? base->bv_val : "\"\"",
-                                       scope, filter->bv_val );
+                                       nbase->bv_val ? nbase->bv_val : "\"\"",
+                                       ldap_pvt_scope2str( scope ),
+                                       filter->bv_val );
 
                                /* entry does not exist */
                                Debug( LDAP_DEBUG_ANY, "%s\n", buf, 0, 0 );
@@ -890,21 +1064,19 @@ done:;
                entry_limbo_t   **elpp, el = { 0 };
 
                el.el_type = LIMBO_ATTRS;
-               if ( !BER_BVISNULL( &ndn ) ) {
-                       ber_dupbv( &el.el_ndn, &ndn );
-               }
-               if ( !BER_BVISNULL( base ) ) {
-                       ber_dupbv( &el.el_base, base);
+               el.el_ndn = ndn_in;
+               if ( !BER_BVISNULL( nbase ) ) {
+                       ber_dupbv( &el.el_nbase, nbase);
                }
                el.el_scope = scope;
                if ( !BER_BVISNULL( filter ) ) {
-                       ber_dupbv( &el.el_filter, filter );
+                       ber_dupbv( &el.el_filter, filter  );
                }
 
                el.el_a = attrs_dup( a );
                el.el_cb = cb;
 
-               for ( elpp = (entry_limbo_t **)&mi->mi_entry_limbo;
+               for ( elpp = &mi->mi_entry_limbo;
                                *elpp;
                                elpp = &(*elpp)->el_next )
                        /* go to last */;
@@ -916,8 +1088,22 @@ done:;
                        return -1;
                }
 
-               el.el_next = NULL;
-               **elpp = el;
+               if ( *elpp != NULL ) {
+                       el.el_next = NULL;
+                       **elpp = el;
+
+               } else {
+                       if ( !BER_BVISNULL( &el.el_filter ) ) {
+                               ch_free( el.el_filter.bv_val );
+                       }
+                       if ( el.el_a != NULL ) {
+                               attrs_free( el.el_a );
+                       }
+                       if ( !BER_BVISNULL( &el.el_nbase ) ) {
+                               ch_free( &el.el_nbase.bv_val );
+                       }
+                       return -1;
+               }
        }
 
        return 0;
@@ -927,12 +1113,12 @@ int
 monitor_back_register_entry_callback(
        struct berval           *ndn,
        monitor_callback_t      *cb,
-       struct berval           *base,
+       struct berval           *nbase,
        int                     scope,
        struct berval           *filter )
 {
        return monitor_back_register_entry_attrs( ndn, NULL, cb,
-                       base, scope, filter );
+                       nbase, scope, filter );
 }
 
 /*
@@ -942,7 +1128,7 @@ monitor_back_register_entry_callback(
  */
 int
 monitor_back_unregister_entry(
-       Entry                   *target_e )
+       struct berval   *ndn )
 {
        monitor_info_t  *mi;
 
@@ -950,26 +1136,32 @@ monitor_back_unregister_entry(
                Debug( LDAP_DEBUG_ANY,
                        "monitor_back_unregister_entry(\"%s\"): "
                        "monitor database not configured.\n",
-                       target_e->e_name.bv_val, 0, 0 );
+                       ndn->bv_val, 0, 0 );
 
                return -1;
        }
 
+       /* entry will be regularly freed, and resources released
+        * according to callbacks */
+       if ( slapd_shutdown ) {
+               return 0;
+       }
+
        mi = ( monitor_info_t * )be_monitor->be_private;
 
        assert( mi != NULL );
 
-       if ( monitor_subsys_opened ) {
+       if ( monitor_subsys_is_opened() ) {
                Entry                   *e = NULL;
                monitor_entry_t         *mp = NULL;
                monitor_callback_t      *cb = NULL;
 
-               if ( monitor_cache_remove( mi, &target_e->e_nname, &e ) != 0 ) {
+               if ( monitor_cache_remove( mi, ndn, &e ) != 0 ) {
                        /* entry does not exist */
                        Debug( LDAP_DEBUG_ANY,
                                "monitor_back_unregister_entry(\"%s\"): "
                                "entry removal failed.\n",
-                               target_e->e_name.bv_val, 0, 0 );
+                               ndn->bv_val, 0, 0 );
                        return -1;
                }
 
@@ -980,16 +1172,196 @@ monitor_back_unregister_entry(
                        monitor_callback_t      *next = cb->mc_next;
 
                        if ( cb->mc_free ) {
-                               (void)cb->mc_free( e, cb->mc_private );
+                               (void)cb->mc_free( e, &cb->mc_private );
                        }
                        ch_free( cb );
 
                        cb = next;
                }
 
+               ch_free( mp );
+               e->e_private = NULL;
+               entry_free( e );
+
        } else {
-               /* TODO: remove from limbo */
-               return 1;
+               entry_limbo_t   **elpp;
+
+               for ( elpp = &mi->mi_entry_limbo;
+                       *elpp;
+                       elpp = &(*elpp)->el_next )
+               {
+                       entry_limbo_t   *elp = *elpp;
+
+                       if ( elp->el_type == LIMBO_ENTRY
+                               && dn_match( ndn, &elp->el_e->e_nname ) )
+                       {
+                               monitor_callback_t      *cb, *next;
+
+                               for ( cb = elp->el_cb; cb; cb = next ) {
+                                       /* FIXME: call callbacks? */
+                                       next = cb->mc_next;
+                                       if ( cb->mc_dispose ) {
+                                               cb->mc_dispose( &cb->mc_private );
+                                       }
+                                       ch_free( cb );
+                               }
+                               assert( elp->el_e != NULL );
+                               elp->el_e->e_private = NULL;
+                               entry_free( elp->el_e );
+                               *elpp = elp->el_next;
+                               ch_free( elp );
+                               elpp = NULL;
+                               break;
+                       }
+               }
+
+               if ( elpp != NULL ) {
+                       /* not found!  where did it go? */
+                       return 1;
+               }
+       }
+
+       return 0;
+}
+
+int
+monitor_back_unregister_entry_parent(
+       struct berval           *nrdn,
+       monitor_callback_t      *target_cb,
+       struct berval           *nbase,
+       int                     scope,
+       struct berval           *filter )
+{
+       monitor_info_t  *mi;
+       struct berval   ndn = BER_BVNULL;
+
+       if ( be_monitor == NULL ) {
+               Debug( LDAP_DEBUG_ANY,
+                       "monitor_back_unregister_entry_parent(base=\"%s\" scope=%s filter=\"%s\"): "
+                       "monitor database not configured.\n",
+                       BER_BVISNULL( nbase ) ? "" : nbase->bv_val,
+                       ldap_pvt_scope2str( scope ),
+                       BER_BVISNULL( filter ) ? "" : filter->bv_val );
+
+               return -1;
+       }
+
+       /* entry will be regularly freed, and resources released
+        * according to callbacks */
+       if ( slapd_shutdown ) {
+               return 0;
+       }
+
+       mi = ( monitor_info_t * )be_monitor->be_private;
+
+       assert( mi != NULL );
+
+       if ( ( nrdn == NULL || BER_BVISNULL( nrdn ) )
+                       && BER_BVISNULL( filter ) )
+       {
+               /* need a filter */
+               Debug( LDAP_DEBUG_ANY,
+                       "monitor_back_unregister_entry_parent(\"\"): "
+                       "need a valid filter\n",
+                       0, 0, 0 );
+               return -1;
+       }
+
+       if ( monitor_subsys_is_opened() ) {
+               Entry                   *e = NULL;
+               monitor_entry_t         *mp = NULL;
+
+               if ( monitor_search2ndn( nbase, scope, filter, &ndn ) ) {
+                       /* entry does not exist */
+                       Debug( LDAP_DEBUG_ANY,
+                               "monitor_back_unregister_entry_parent(\"\"): "
+                               "base=\"%s\" scope=%s filter=\"%s\": "
+                               "unable to find entry\n",
+                               nbase->bv_val ? nbase->bv_val : "\"\"",
+                               ldap_pvt_scope2str( scope ),
+                               filter->bv_val );
+                       return -1;
+               }
+
+               if ( monitor_cache_remove( mi, &ndn, &e ) != 0 ) {
+                       /* entry does not exist */
+                       Debug( LDAP_DEBUG_ANY,
+                               "monitor_back_unregister_entry(\"%s\"): "
+                               "entry removal failed.\n",
+                               ndn.bv_val, 0, 0 );
+                       ber_memfree( ndn.bv_val );
+                       return -1;
+               }
+               ber_memfree( ndn.bv_val );
+
+               mp = (monitor_entry_t *)e->e_private;
+               assert( mp != NULL );
+
+               if ( target_cb != NULL ) {
+                       monitor_callback_t      **cbp;
+
+                       for ( cbp = &mp->mp_cb; *cbp != NULL; cbp = &(*cbp)->mc_next ) {
+                               if ( *cbp == target_cb ) {
+                                       if ( (*cbp)->mc_free ) {
+                                               (void)(*cbp)->mc_free( e, &(*cbp)->mc_private );
+                                       }
+                                       *cbp = (*cbp)->mc_next;
+                                       ch_free( target_cb );
+                                       break;
+                               }
+                       }
+               }
+
+
+               ch_free( mp );
+               e->e_private = NULL;
+               entry_free( e );
+
+       } else {
+               entry_limbo_t   **elpp;
+
+               for ( elpp = &mi->mi_entry_limbo;
+                       *elpp;
+                       elpp = &(*elpp)->el_next )
+               {
+                       entry_limbo_t   *elp = *elpp;
+
+                       if ( elp->el_type == LIMBO_ENTRY_PARENT
+                               && dn_match( nrdn, &elp->el_e->e_nname )
+                               && dn_match( nbase, &elp->el_nbase )
+                               && scope == elp->el_scope
+                               && bvmatch( filter, &elp->el_filter ) )
+                       {
+                               monitor_callback_t      *cb, *next;
+
+                               for ( cb = elp->el_cb; cb; cb = next ) {
+                                       /* FIXME: call callbacks? */
+                                       next = cb->mc_next;
+                                       if ( cb->mc_dispose ) {
+                                               cb->mc_dispose( &cb->mc_private );
+                                       }
+                                       ch_free( cb );
+                               }
+                               assert( elp->el_e != NULL );
+                               elp->el_e->e_private = NULL;
+                               entry_free( elp->el_e );
+                               if ( !BER_BVISNULL( &elp->el_nbase ) ) {
+                                       ch_free( elp->el_nbase.bv_val );
+                               }
+                               if ( !BER_BVISNULL( &elp->el_filter ) ) {
+                                       ch_free( elp->el_filter.bv_val );
+                               }
+                               *elpp = elp->el_next;
+                               ch_free( elp );
+                               elpp = NULL;
+                               break;
+                       }
+               }
+
+               if ( elpp != NULL ) {
+                       /* not found!  where did it go? */
+                       return 1;
+               }
        }
 
        return 0;
@@ -1000,7 +1372,7 @@ monitor_back_unregister_entry_attrs(
        struct berval           *ndn_in,
        Attribute               *target_a,
        monitor_callback_t      *target_cb,
-       struct berval           *base,
+       struct berval           *nbase,
        int                     scope,
        struct berval           *filter )
 {
@@ -1015,14 +1387,20 @@ monitor_back_unregister_entry_attrs(
                        "monitor_back_unregister_entry_%s(base=\"%s\" scope=%s filter=\"%s\"): "
                        "monitor database not configured.\n",
                        fname,
-                       BER_BVISNULL( base ) ? "" : base->bv_val,
-                       (char *)ldap_pvt_scope2str( scope ),
+                       BER_BVISNULL( nbase ) ? "" : nbase->bv_val,
+                       ldap_pvt_scope2str( scope ),
                        BER_BVISNULL( filter ) ? "" : filter->bv_val );
                Debug( LDAP_DEBUG_ANY, "%s\n", buf, 0, 0 );
 
                return -1;
        }
 
+       /* entry will be regularly freed, and resources released
+        * according to callbacks */
+       if ( slapd_shutdown ) {
+               return 0;
+       }
+
        mi = ( monitor_info_t * )be_monitor->be_private;
 
        assert( mi != NULL );
@@ -1047,13 +1425,13 @@ monitor_back_unregister_entry_attrs(
                return -1;
        }
 
-       if ( monitor_subsys_opened ) {
+       if ( monitor_subsys_is_opened() ) {
                Entry                   *e = NULL;
                monitor_entry_t         *mp = NULL;
                int                     freeit = 0;
 
                if ( BER_BVISNULL( &ndn ) ) {
-                       if ( monitor_filter2ndn( base, scope, filter, &ndn ) ) {
+                       if ( monitor_search2ndn( nbase, scope, filter, &ndn ) ) {
                                char            buf[ SLAP_TEXT_BUFLEN ];
 
                                snprintf( buf, sizeof( buf ),
@@ -1061,7 +1439,7 @@ monitor_back_unregister_entry_attrs(
                                        "base=\"%s\" scope=%d filter=\"%s\": "
                                        "unable to find entry\n",
                                        fname,
-                                       base->bv_val ? base->bv_val : "\"\"",
+                                       nbase->bv_val ? nbase->bv_val : "\"\"",
                                        scope, filter->bv_val );
 
                                /* entry does not exist */
@@ -1090,7 +1468,7 @@ monitor_back_unregister_entry_attrs(
                        for ( cbp = &mp->mp_cb; *cbp != NULL; cbp = &(*cbp)->mc_next ) {
                                if ( *cbp == target_cb ) {
                                        if ( (*cbp)->mc_free ) {
-                                               (void)(*cbp)->mc_free( e, (*cbp)->mc_private );
+                                               (void)(*cbp)->mc_free( e, &(*cbp)->mc_private );
                                        }
                                        *cbp = (*cbp)->mc_next;
                                        ch_free( target_cb );
@@ -1121,13 +1499,53 @@ monitor_back_unregister_entry_attrs(
                        ber_memfree( ndn.bv_val );
                }
 
-               if ( e ) {
-                       monitor_cache_release( mi, e );
-               }
+               monitor_cache_release( mi, e );
 
        } else {
-               /* TODO: remove from limbo */
-               return 1;
+               entry_limbo_t   **elpp;
+
+               for ( elpp = &mi->mi_entry_limbo;
+                       *elpp;
+                       elpp = &(*elpp)->el_next )
+               {
+                       entry_limbo_t   *elp = *elpp;
+
+                       if ( elp->el_type == LIMBO_ATTRS
+                               && dn_match( nbase, &elp->el_nbase )
+                               && scope == elp->el_scope
+                               && bvmatch( filter, &elp->el_filter ) )
+                       {
+                               monitor_callback_t      *cb, *next;
+
+                               for ( cb = elp->el_cb; cb; cb = next ) {
+                                       /* FIXME: call callbacks? */
+                                       next = cb->mc_next;
+                                       if ( cb->mc_dispose ) {
+                                               cb->mc_dispose( &cb->mc_private );
+                                       }
+                                       ch_free( cb );
+                               }
+                               assert( elp->el_e == NULL );
+                               if ( elp->el_a != NULL ) {
+                                       attrs_free( elp->el_a );
+                               }
+                               if ( !BER_BVISNULL( &elp->el_nbase ) ) {
+                                       ch_free( elp->el_nbase.bv_val );
+                               }
+                               if ( !BER_BVISNULL( &elp->el_filter ) ) {
+                                       ch_free( elp->el_filter.bv_val );
+                               }
+                               *elpp = elp->el_next;
+                               ch_free( elp );
+                               elpp = NULL;
+                               break;
+                       }
+               }
+
+               if ( elpp != NULL ) {
+                       /* not found!  where did it go? */
+                       return 1;
+               }
        }
 
        return 0;
@@ -1137,7 +1555,7 @@ int
 monitor_back_unregister_entry_callback(
        struct berval           *ndn,
        monitor_callback_t      *cb,
-       struct berval           *base,
+       struct berval           *nbase,
        int                     scope,
        struct berval           *filter )
 {
@@ -1145,7 +1563,7 @@ monitor_back_unregister_entry_callback(
         * unregister the callback; if a is not null, unregister the
         * given attrs.  In any case, call cb->cb_free */
        return monitor_back_unregister_entry_attrs( ndn,
-               NULL, cb, base, scope, filter );
+               NULL, cb, nbase, scope, filter );
 }
 
 monitor_subsys_t *
@@ -1216,12 +1634,11 @@ monitor_back_initialize(
        };
 
        struct m_s {
-               char    *name;
                char    *schema;
                slap_mask_t flags;
                int     offset;
        } moc[] = {
-               { "monitor", "( 1.3.6.1.4.1.4203.666.3.16.1 "
+               { "( 1.3.6.1.4.1.4203.666.3.16.1 "
                        "NAME 'monitor' "
                        "DESC 'OpenLDAP system monitoring' "
                        "SUP top STRUCTURAL "
@@ -1235,44 +1652,44 @@ monitor_back_initialize(
                                "$ monitorOverlay "
                        ") )", SLAP_OC_OPERATIONAL|SLAP_OC_HIDE,
                        offsetof(monitor_info_t, mi_oc_monitor) },
-               { "monitorServer", "( 1.3.6.1.4.1.4203.666.3.16.2 "
+               { "( 1.3.6.1.4.1.4203.666.3.16.2 "
                        "NAME 'monitorServer' "
                        "DESC 'Server monitoring root entry' "
                        "SUP monitor STRUCTURAL )", SLAP_OC_OPERATIONAL|SLAP_OC_HIDE,
                        offsetof(monitor_info_t, mi_oc_monitorServer) },
-               { "monitorContainer", "( 1.3.6.1.4.1.4203.666.3.16.3 "
+               { "( 1.3.6.1.4.1.4203.666.3.16.3 "
                        "NAME 'monitorContainer' "
                        "DESC 'monitor container class' "
                        "SUP monitor STRUCTURAL )", SLAP_OC_OPERATIONAL|SLAP_OC_HIDE,
                        offsetof(monitor_info_t, mi_oc_monitorContainer) },
-               { "monitorCounterObject", "( 1.3.6.1.4.1.4203.666.3.16.4 "
+               { "( 1.3.6.1.4.1.4203.666.3.16.4 "
                        "NAME 'monitorCounterObject' "
                        "DESC 'monitor counter class' "
                        "SUP monitor STRUCTURAL )", SLAP_OC_OPERATIONAL|SLAP_OC_HIDE,
                        offsetof(monitor_info_t, mi_oc_monitorCounterObject) },
-               { "monitorOperation", "( 1.3.6.1.4.1.4203.666.3.16.5 "
+               { "( 1.3.6.1.4.1.4203.666.3.16.5 "
                        "NAME 'monitorOperation' "
                        "DESC 'monitor operation class' "
                        "SUP monitor STRUCTURAL )", SLAP_OC_OPERATIONAL|SLAP_OC_HIDE,
                        offsetof(monitor_info_t, mi_oc_monitorOperation) },
-               { "monitorConnection", "( 1.3.6.1.4.1.4203.666.3.16.6 "
+               { "( 1.3.6.1.4.1.4203.666.3.16.6 "
                        "NAME 'monitorConnection' "
                        "DESC 'monitor connection class' "
                        "SUP monitor STRUCTURAL )", SLAP_OC_OPERATIONAL|SLAP_OC_HIDE,
                        offsetof(monitor_info_t, mi_oc_monitorConnection) },
-               { "managedObject", "( 1.3.6.1.4.1.4203.666.3.16.7 "
+               { "( 1.3.6.1.4.1.4203.666.3.16.7 "
                        "NAME 'managedObject' "
                        "DESC 'monitor managed entity class' "
                        "SUP monitor STRUCTURAL )", SLAP_OC_OPERATIONAL|SLAP_OC_HIDE,
                        offsetof(monitor_info_t, mi_oc_managedObject) },
-               { "monitoredObject", "( 1.3.6.1.4.1.4203.666.3.16.8 "
+               { "( 1.3.6.1.4.1.4203.666.3.16.8 "
                        "NAME 'monitoredObject' "
                        "DESC 'monitor monitored entity class' "
                        "SUP monitor STRUCTURAL )", SLAP_OC_OPERATIONAL|SLAP_OC_HIDE,
                        offsetof(monitor_info_t, mi_oc_monitoredObject) },
-               { NULL, NULL, 0, -1 }
+               { NULL, 0, -1 }
        }, mat[] = {
-               { "monitoredInfo", "( 1.3.6.1.4.1.4203.666.1.55.1 "
+               { "( 1.3.6.1.4.1.4203.666.1.55.1 "
                        "NAME 'monitoredInfo' "
                        "DESC 'monitored info' "
                        /* "SUP name " */
@@ -1280,67 +1697,67 @@ monitor_back_initialize(
                        "SUBSTR caseIgnoreSubstringsMatch "
                        "SYNTAX 1.3.6.1.4.1.1466.115.121.1.15{32768} "
                        "NO-USER-MODIFICATION "
-                       "USAGE directoryOperation )", SLAP_AT_HIDE,
+                       "USAGE dSAOperation )", SLAP_AT_HIDE,
                        offsetof(monitor_info_t, mi_ad_monitoredInfo) },
-               { "managedInfo", "( 1.3.6.1.4.1.4203.666.1.55.2 "
+               { "( 1.3.6.1.4.1.4203.666.1.55.2 "
                        "NAME 'managedInfo' "
                        "DESC 'monitor managed info' "
                        "SUP name )", SLAP_AT_HIDE,
                        offsetof(monitor_info_t, mi_ad_managedInfo) },
-               { "monitorCounter", "( 1.3.6.1.4.1.4203.666.1.55.3 "
+               { "( 1.3.6.1.4.1.4203.666.1.55.3 "
                        "NAME 'monitorCounter' "
                        "DESC 'monitor counter' "
                        "EQUALITY integerMatch "
                        "ORDERING integerOrderingMatch "
                        "SYNTAX 1.3.6.1.4.1.1466.115.121.1.27 "
                        "NO-USER-MODIFICATION "
-                       "USAGE directoryOperation )", SLAP_AT_HIDE,
+                       "USAGE dSAOperation )", SLAP_AT_HIDE,
                        offsetof(monitor_info_t, mi_ad_monitorCounter) },
-               { "monitorOpCompleted", "( 1.3.6.1.4.1.4203.666.1.55.4 "
+               { "( 1.3.6.1.4.1.4203.666.1.55.4 "
                        "NAME 'monitorOpCompleted' "
                        "DESC 'monitor completed operations' "
                        "SUP monitorCounter "
                        "NO-USER-MODIFICATION "
-                       "USAGE directoryOperation )", SLAP_AT_FINAL|SLAP_AT_HIDE,
+                       "USAGE dSAOperation )", SLAP_AT_FINAL|SLAP_AT_HIDE,
                        offsetof(monitor_info_t, mi_ad_monitorOpCompleted) },
-               { "monitorOpInitiated", "( 1.3.6.1.4.1.4203.666.1.55.5 "
+               { "( 1.3.6.1.4.1.4203.666.1.55.5 "
                        "NAME 'monitorOpInitiated' "
                        "DESC 'monitor initiated operations' "
                        "SUP monitorCounter "
                        "NO-USER-MODIFICATION "
-                       "USAGE directoryOperation )", SLAP_AT_FINAL|SLAP_AT_HIDE,
+                       "USAGE dSAOperation )", SLAP_AT_FINAL|SLAP_AT_HIDE,
                        offsetof(monitor_info_t, mi_ad_monitorOpInitiated) },
-               { "monitorConnectionNumber", "( 1.3.6.1.4.1.4203.666.1.55.6 "
+               { "( 1.3.6.1.4.1.4203.666.1.55.6 "
                        "NAME 'monitorConnectionNumber' "
                        "DESC 'monitor connection number' "
                        "SUP monitorCounter "
                        "NO-USER-MODIFICATION "
-                       "USAGE directoryOperation )", SLAP_AT_FINAL|SLAP_AT_HIDE,
+                       "USAGE dSAOperation )", SLAP_AT_FINAL|SLAP_AT_HIDE,
                        offsetof(monitor_info_t, mi_ad_monitorConnectionNumber) },
-               { "monitorConnectionAuthzDN", "( 1.3.6.1.4.1.4203.666.1.55.7 "
+               { "( 1.3.6.1.4.1.4203.666.1.55.7 "
                        "NAME 'monitorConnectionAuthzDN' "
                        "DESC 'monitor connection authorization DN' "
                        /* "SUP distinguishedName " */
                        "EQUALITY distinguishedNameMatch "
                        "SYNTAX 1.3.6.1.4.1.1466.115.121.1.12 "
                        "NO-USER-MODIFICATION "
-                       "USAGE directoryOperation )", SLAP_AT_FINAL|SLAP_AT_HIDE,
+                       "USAGE dSAOperation )", SLAP_AT_FINAL|SLAP_AT_HIDE,
                        offsetof(monitor_info_t, mi_ad_monitorConnectionAuthzDN) },
-               { "monitorConnectionLocalAddress", "( 1.3.6.1.4.1.4203.666.1.55.8 "
+               { "( 1.3.6.1.4.1.4203.666.1.55.8 "
                        "NAME 'monitorConnectionLocalAddress' "
                        "DESC 'monitor connection local address' "
                        "SUP monitoredInfo "
                        "NO-USER-MODIFICATION "
-                       "USAGE directoryOperation )", SLAP_AT_FINAL|SLAP_AT_HIDE,
+                       "USAGE dSAOperation )", SLAP_AT_FINAL|SLAP_AT_HIDE,
                        offsetof(monitor_info_t, mi_ad_monitorConnectionLocalAddress) },
-               { "monitorConnectionPeerAddress", "( 1.3.6.1.4.1.4203.666.1.55.9 "
+               { "( 1.3.6.1.4.1.4203.666.1.55.9 "
                        "NAME 'monitorConnectionPeerAddress' "
                        "DESC 'monitor connection peer address' "
                        "SUP monitoredInfo "
                        "NO-USER-MODIFICATION "
-                       "USAGE directoryOperation )", SLAP_AT_FINAL|SLAP_AT_HIDE,
+                       "USAGE dSAOperation )", SLAP_AT_FINAL|SLAP_AT_HIDE,
                        offsetof(monitor_info_t, mi_ad_monitorConnectionPeerAddress) },
-               { "monitorTimestamp", "( 1.3.6.1.4.1.4203.666.1.55.10 "
+               { "( 1.3.6.1.4.1.4203.666.1.55.10 "
                        "NAME 'monitorTimestamp' "
                        "DESC 'monitor timestamp' "
                        "EQUALITY generalizedTimeMatch "
@@ -1348,241 +1765,228 @@ monitor_back_initialize(
                        "SYNTAX 1.3.6.1.4.1.1466.115.121.1.24 "
                        "SINGLE-VALUE "
                        "NO-USER-MODIFICATION "
-                       "USAGE directoryOperation )", SLAP_AT_FINAL|SLAP_AT_HIDE,
+                       "USAGE dSAOperation )", SLAP_AT_FINAL|SLAP_AT_HIDE,
                        offsetof(monitor_info_t, mi_ad_monitorTimestamp) },
-               { "monitorOverlay", "( 1.3.6.1.4.1.4203.666.1.55.11 "
+               { "( 1.3.6.1.4.1.4203.666.1.55.11 "
                        "NAME 'monitorOverlay' "
                        "DESC 'name of overlays defined for a given database' "
                        "SUP monitoredInfo "
                        "NO-USER-MODIFICATION "
-                       "USAGE directoryOperation )", SLAP_AT_HIDE,
+                       "USAGE dSAOperation )", SLAP_AT_HIDE,
                        offsetof(monitor_info_t, mi_ad_monitorOverlay) },
-               { "readOnly", "( 1.3.6.1.4.1.4203.666.1.55.12 "
+               { "( 1.3.6.1.4.1.4203.666.1.55.12 "
                        "NAME 'readOnly' "
                        "DESC 'read/write status of a given database' "
                        "EQUALITY booleanMatch "
                        "SYNTAX 1.3.6.1.4.1.1466.115.121.1.7 "
                        "SINGLE-VALUE "
-                       "USAGE directoryOperation )", SLAP_AT_HIDE,
+                       "USAGE dSAOperation )", SLAP_AT_HIDE,
                        offsetof(monitor_info_t, mi_ad_readOnly) },
-               { "restrictedOperation", "( 1.3.6.1.4.1.4203.666.1.55.13 "
+               { "( 1.3.6.1.4.1.4203.666.1.55.13 "
                        "NAME 'restrictedOperation' "
                        "DESC 'name of restricted operation for a given database' "
                        "SUP managedInfo )", SLAP_AT_HIDE,
                        offsetof(monitor_info_t, mi_ad_restrictedOperation ) },
-               { "monitorConnectionProtocol", "( 1.3.6.1.4.1.4203.666.1.55.14 "
+               { "( 1.3.6.1.4.1.4203.666.1.55.14 "
                        "NAME 'monitorConnectionProtocol' "
                        "DESC 'monitor connection protocol' "
                        "SUP monitoredInfo "
                        "NO-USER-MODIFICATION "
-                       "USAGE directoryOperation )", SLAP_AT_FINAL|SLAP_AT_HIDE,
+                       "USAGE dSAOperation )", SLAP_AT_FINAL|SLAP_AT_HIDE,
                        offsetof(monitor_info_t, mi_ad_monitorConnectionProtocol) },
-               { "monitorConnectionOpsReceived", "( 1.3.6.1.4.1.4203.666.1.55.15 "
+               { "( 1.3.6.1.4.1.4203.666.1.55.15 "
                        "NAME 'monitorConnectionOpsReceived' "
                        "DESC 'monitor number of operations received by the connection' "
                        "SUP monitorCounter "
                        "NO-USER-MODIFICATION "
-                       "USAGE directoryOperation )", SLAP_AT_FINAL|SLAP_AT_HIDE,
+                       "USAGE dSAOperation )", SLAP_AT_FINAL|SLAP_AT_HIDE,
                        offsetof(monitor_info_t, mi_ad_monitorConnectionOpsReceived) },
-               { "monitorConnectionOpsExecuting", "( 1.3.6.1.4.1.4203.666.1.55.16 "
+               { "( 1.3.6.1.4.1.4203.666.1.55.16 "
                        "NAME 'monitorConnectionOpsExecuting' "
                        "DESC 'monitor number of operations in execution within the connection' "
                        "SUP monitorCounter "
                        "NO-USER-MODIFICATION "
-                       "USAGE directoryOperation )", SLAP_AT_FINAL|SLAP_AT_HIDE,
+                       "USAGE dSAOperation )", SLAP_AT_FINAL|SLAP_AT_HIDE,
                        offsetof(monitor_info_t, mi_ad_monitorConnectionOpsExecuting) },
-               { "monitorConnectionOpsPending", "( 1.3.6.1.4.1.4203.666.1.55.17 "
+               { "( 1.3.6.1.4.1.4203.666.1.55.17 "
                        "NAME 'monitorConnectionOpsPending' "
                        "DESC 'monitor number of pending operations within the connection' "
                        "SUP monitorCounter "
                        "NO-USER-MODIFICATION "
-                       "USAGE directoryOperation )", SLAP_AT_FINAL|SLAP_AT_HIDE,
+                       "USAGE dSAOperation )", SLAP_AT_FINAL|SLAP_AT_HIDE,
                        offsetof(monitor_info_t, mi_ad_monitorConnectionOpsPending) },
-               { "monitorConnectionOpsCompleted", "( 1.3.6.1.4.1.4203.666.1.55.18 "
+               { "( 1.3.6.1.4.1.4203.666.1.55.18 "
                        "NAME 'monitorConnectionOpsCompleted' "
                        "DESC 'monitor number of operations completed within the connection' "
                        "SUP monitorCounter "
                        "NO-USER-MODIFICATION "
-                       "USAGE directoryOperation )", SLAP_AT_FINAL|SLAP_AT_HIDE,
+                       "USAGE dSAOperation )", SLAP_AT_FINAL|SLAP_AT_HIDE,
                        offsetof(monitor_info_t, mi_ad_monitorConnectionOpsCompleted) },
-               { "monitorConnectionGet", "( 1.3.6.1.4.1.4203.666.1.55.19 "
+               { "( 1.3.6.1.4.1.4203.666.1.55.19 "
                        "NAME 'monitorConnectionGet' "
                        "DESC 'number of times connection_get() was called so far' "
                        "SUP monitorCounter "
                        "NO-USER-MODIFICATION "
-                       "USAGE directoryOperation )", SLAP_AT_FINAL|SLAP_AT_HIDE,
+                       "USAGE dSAOperation )", SLAP_AT_FINAL|SLAP_AT_HIDE,
                        offsetof(monitor_info_t, mi_ad_monitorConnectionGet) },
-               { "monitorConnectionRead", "( 1.3.6.1.4.1.4203.666.1.55.20 "
+               { "( 1.3.6.1.4.1.4203.666.1.55.20 "
                        "NAME 'monitorConnectionRead' "
                        "DESC 'number of times connection_read() was called so far' "
                        "SUP monitorCounter "
                        "NO-USER-MODIFICATION "
-                       "USAGE directoryOperation )", SLAP_AT_FINAL|SLAP_AT_HIDE,
+                       "USAGE dSAOperation )", SLAP_AT_FINAL|SLAP_AT_HIDE,
                        offsetof(monitor_info_t, mi_ad_monitorConnectionRead) },
-               { "monitorConnectionWrite", "( 1.3.6.1.4.1.4203.666.1.55.21 "
+               { "( 1.3.6.1.4.1.4203.666.1.55.21 "
                        "NAME 'monitorConnectionWrite' "
                        "DESC 'number of times connection_write() was called so far' "
                        "SUP monitorCounter "
                        "NO-USER-MODIFICATION "
-                       "USAGE directoryOperation )", SLAP_AT_FINAL|SLAP_AT_HIDE,
+                       "USAGE dSAOperation )", SLAP_AT_FINAL|SLAP_AT_HIDE,
                        offsetof(monitor_info_t, mi_ad_monitorConnectionWrite) },
-               { "monitorConnectionMask", "( 1.3.6.1.4.1.4203.666.1.55.22 "
+               { "( 1.3.6.1.4.1.4203.666.1.55.22 "
                        "NAME 'monitorConnectionMask' "
                        "DESC 'monitor connection mask' "
                        "SUP monitoredInfo "
                        "NO-USER-MODIFICATION "
-                       "USAGE directoryOperation )", SLAP_AT_FINAL|SLAP_AT_HIDE,
+                       "USAGE dSAOperation )", SLAP_AT_FINAL|SLAP_AT_HIDE,
                        offsetof(monitor_info_t, mi_ad_monitorConnectionMask) },
-               { "monitorConnectionListener", "( 1.3.6.1.4.1.4203.666.1.55.23 "
+               { "( 1.3.6.1.4.1.4203.666.1.55.23 "
                        "NAME 'monitorConnectionListener' "
                        "DESC 'monitor connection listener' "
                        "SUP monitoredInfo "
                        "NO-USER-MODIFICATION "
-                       "USAGE directoryOperation )", SLAP_AT_FINAL|SLAP_AT_HIDE,
+                       "USAGE dSAOperation )", SLAP_AT_FINAL|SLAP_AT_HIDE,
                        offsetof(monitor_info_t, mi_ad_monitorConnectionListener) },
-               { "monitorConnectionPeerDomain", "( 1.3.6.1.4.1.4203.666.1.55.24 "
+               { "( 1.3.6.1.4.1.4203.666.1.55.24 "
                        "NAME 'monitorConnectionPeerDomain' "
                        "DESC 'monitor connection peer domain' "
                        "SUP monitoredInfo "
                        "NO-USER-MODIFICATION "
-                       "USAGE directoryOperation )", SLAP_AT_FINAL|SLAP_AT_HIDE,
+                       "USAGE dSAOperation )", SLAP_AT_FINAL|SLAP_AT_HIDE,
                        offsetof(monitor_info_t, mi_ad_monitorConnectionPeerDomain) },
-               { "monitorConnectionStartTime", "( 1.3.6.1.4.1.4203.666.1.55.25 "
+               { "( 1.3.6.1.4.1.4203.666.1.55.25 "
                        "NAME 'monitorConnectionStartTime' "
                        "DESC 'monitor connection start time' "
                        "SUP monitorTimestamp "
                        "SINGLE-VALUE "
                        "NO-USER-MODIFICATION "
-                       "USAGE directoryOperation )", SLAP_AT_FINAL|SLAP_AT_HIDE,
+                       "USAGE dSAOperation )", SLAP_AT_FINAL|SLAP_AT_HIDE,
                        offsetof(monitor_info_t, mi_ad_monitorConnectionStartTime) },
-               { "monitorConnectionActivityTime", "( 1.3.6.1.4.1.4203.666.1.55.26 "
+               { "( 1.3.6.1.4.1.4203.666.1.55.26 "
                        "NAME 'monitorConnectionActivityTime' "
                        "DESC 'monitor connection activity time' "
                        "SUP monitorTimestamp "
                        "SINGLE-VALUE "
                        "NO-USER-MODIFICATION "
-                       "USAGE directoryOperation )", SLAP_AT_FINAL|SLAP_AT_HIDE,
+                       "USAGE dSAOperation )", SLAP_AT_FINAL|SLAP_AT_HIDE,
                        offsetof(monitor_info_t, mi_ad_monitorConnectionActivityTime) },
-               { "monitorIsShadow", "( 1.3.6.1.4.1.4203.666.1.55.27 "
+               { "( 1.3.6.1.4.1.4203.666.1.55.27 "
                        "NAME 'monitorIsShadow' "
                        "DESC 'TRUE if the database is shadow' "
                        "EQUALITY booleanMatch "
                        "SYNTAX 1.3.6.1.4.1.1466.115.121.1.7 "
                        "SINGLE-VALUE "
-                       "USAGE directoryOperation )", SLAP_AT_HIDE,
+                       "USAGE dSAOperation )", SLAP_AT_HIDE,
                        offsetof(monitor_info_t, mi_ad_monitorIsShadow) },
-               { "monitorUpdateRef", "( 1.3.6.1.4.1.4203.666.1.55.28 "
+               { "( 1.3.6.1.4.1.4203.666.1.55.28 "
                        "NAME 'monitorUpdateRef' "
                        "DESC 'update referral for shadow databases' "
                        "SUP monitoredInfo "
                        "SINGLE-VALUE "
-                       "USAGE directoryOperation )", SLAP_AT_HIDE,
+                       "USAGE dSAOperation )", SLAP_AT_HIDE,
                        offsetof(monitor_info_t, mi_ad_monitorUpdateRef) },
-               { "monitorRuntimeConfig", "( 1.3.6.1.4.1.4203.666.1.55.29 "
+               { "( 1.3.6.1.4.1.4203.666.1.55.29 "
                        "NAME 'monitorRuntimeConfig' "
                        "DESC 'TRUE if component allows runtime configuration' "
                        "EQUALITY booleanMatch "
                        "SYNTAX 1.3.6.1.4.1.1466.115.121.1.7 "
                        "SINGLE-VALUE "
-                       "USAGE directoryOperation )", SLAP_AT_HIDE,
+                       "USAGE dSAOperation )", SLAP_AT_HIDE,
                        offsetof(monitor_info_t, mi_ad_monitorRuntimeConfig) },
-               { NULL, NULL, 0, -1 }
+               { NULL, 0, -1 }
+       };
+
+       static struct {
+               char                    *name;
+               char                    *oid;
+       }               s_oid[] = {
+               { "olmAttributes",                      "1.3.6.1.4.1.4203.666.1.55" },
+               { "olmSubSystemAttributes",             "olmAttributes:0" },
+               { "olmGenericAttributes",               "olmSubSystemAttributes:0" },
+               { "olmDatabaseAttributes",              "olmSubSystemAttributes:1" },
+
+               /* for example, back-bdb specific attrs
+                * are in "olmDatabaseAttributes:1"
+                *
+                * NOTE: developers, please record here OID assignments
+                * for other modules */
+
+               { "olmObjectClasses",                   "1.3.6.1.4.1.4203.666.3.16" },
+               { "olmSubSystemObjectClasses",          "olmObjectClasses:0" },
+               { "olmGenericObjectClasses",            "olmSubSystemObjectClasses:0" },
+               { "olmDatabaseObjectClasses",           "olmSubSystemObjectClasses:1" },
+
+               /* for example, back-bdb specific objectClasses
+                * are in "olmDatabaseObjectClasses:1"
+                *
+                * NOTE: developers, please record here OID assignments
+                * for other modules */
+
+               { NULL }
        };
 
        int                     i, rc;
-       const char              *text;
        monitor_info_t          *mi = &monitor_info;
+       ConfigArgs c;
+       char    *argv[ 3 ];
 
-       /* schema integration */
-       for ( i = 0; mat[ i ].name; i++ ) {
-               LDAPAttributeType       *at;
-               int                     code;
-               const char              *err;
-               AttributeDescription    **ad;
-
-               at = ldap_str2attributetype( mat[ i ].schema, &code,
-                       &err, LDAP_SCHEMA_ALLOW_ALL );
-               if ( !at ) {
-                       Debug( LDAP_DEBUG_ANY, "monitor_back_db_init: "
-                               "in AttributeType \"%s\" %s before %s\n",
-                               mat[ i ].name, ldap_scherr2str(code), err );
-                       return -1;
-               }
+       argv[ 0 ] = "monitor";
+       c.argv = argv;
+       c.argc = 3;
+       c.fname = argv[0];
 
-               if ( at->at_oid == NULL ) {
-                       ldap_attributetype_free(at);
-                       Debug( LDAP_DEBUG_ANY, "monitor_back_db_init: "
-                               "null OID for attributeType \"%s\"\n",
-                               mat[ i ].name, 0, 0 );
-                       return -1;
-               }
-
-               code = at_add(at, 0, NULL, &err);
-               if ( code ) {
-                       ldap_attributetype_free(at);
-                       Debug( LDAP_DEBUG_ANY, "monitor_back_db_init: "
-                               "%s in attributeType \"%s\"\n",
-                               scherr2str(code), mat[ i ].name, 0 );
-                       return -1;
-               }
-               ldap_memfree(at);
+       for ( i = 0; s_oid[ i ].name; i++ ) {
+               argv[ 1 ] = s_oid[ i ].name;
+               argv[ 2 ] = s_oid[ i ].oid;
 
-               ad = ((AttributeDescription **)&(((char *)mi)[ mat[ i ].offset ]));
-               ad[ 0 ] = NULL;
-               if ( slap_str2ad( mat[ i ].name, ad, &text ) ) {
+               if ( parse_oidm( &c, 0, NULL ) != 0 ) {
                        Debug( LDAP_DEBUG_ANY,
-                               "monitor_back_db_init: %s\n", text, 0, 0 );
-                       return -1;
+                               "monitor_back_initialize: unable to add "
+                               "objectIdentifier \"%s=%s\"\n",
+                               s_oid[ i ].name, s_oid[ i ].oid, 0 );
+                       return 1;
                }
-
-               (*ad)->ad_type->sat_flags |= mat[ i ].flags;
        }
 
-       for ( i = 0; moc[ i ].name; i++ ) {
-               LDAPObjectClass         *oc;
+       /* schema integration */
+       for ( i = 0; mat[ i ].schema; i++ ) {
                int                     code;
-               const char              *err;
-               ObjectClass             *Oc;
+               AttributeDescription **ad =
+                       ((AttributeDescription **)&(((char *)mi)[ mat[ i ].offset ]));
 
-               oc = ldap_str2objectclass(moc[ i ].schema, &code, &err,
-                               LDAP_SCHEMA_ALLOW_ALL );
-               if ( !oc ) {
-                       Debug( LDAP_DEBUG_ANY,
-                               "unable to parse monitor objectclass \"%s\": "
-                               "%s before %s\n" , moc[ i ].name,
-                               ldap_scherr2str(code), err );
-                       return -1;
-               }
+               *ad = NULL;
+               code = register_at( mat[ i ].schema, ad, 0 );
 
-               if ( oc->oc_oid == NULL ) {
-                       ldap_objectclass_free(oc);
+               if ( code ) {
                        Debug( LDAP_DEBUG_ANY,
-                               "objectclass \"%s\" has no OID\n" ,
-                               moc[ i ].name, 0, 0 );
+                               "monitor_back_db_init: register_at failed\n", 0, 0, 0 );
                        return -1;
                }
+               (*ad)->ad_type->sat_flags |= mat[ i ].flags;
+       }
 
-               code = oc_add(oc, 0, NULL, &err);
+       for ( i = 0; moc[ i ].schema; i++ ) {
+               int                     code;
+               ObjectClass             **Oc =
+                       ((ObjectClass **)&(((char *)mi)[ moc[ i ].offset ]));
+
+               code = register_oc( moc[ i ].schema, Oc, 0 );
                if ( code ) {
-                       ldap_objectclass_free(oc);
                        Debug( LDAP_DEBUG_ANY,
-                               "objectclass \"%s\": %s \"%s\"\n" ,
-                               moc[ i ].name, scherr2str(code), err );
-                       return -1;
-               }
-               ldap_memfree(oc);
-
-               Oc = oc_find( moc[ i ].name );
-               if ( Oc == NULL ) {
-                       Debug( LDAP_DEBUG_ANY, "monitor_back_db_init: "
-                                       "unable to find objectClass %s "
-                                       "(just added)\n", moc[ i ].name, 0, 0 );
+                               "monitor_back_db_init: register_oc failed\n", 0, 0, 0 );
                        return -1;
                }
-
-               Oc->soc_flags |= moc[ i ].flags;
-
-               ((ObjectClass **)&(((char *)mi)[ moc[ i ].offset ]))[ 0 ] = Oc;
+               (*Oc)->soc_flags |= moc[ i ].flags;
        }
 
        bi->bi_controls = controls;
@@ -1629,12 +2033,13 @@ monitor_back_initialize(
        bi->bi_tool_entry_reindex = 0;
        bi->bi_tool_sync = 0;
        bi->bi_tool_dn2id_get = 0;
-       bi->bi_tool_id2entry_get = 0;
        bi->bi_tool_entry_modify = 0;
 
        bi->bi_connection_init = 0;
        bi->bi_connection_destroy = 0;
 
+       bi->bi_extra = (void *)&monitor_extra;
+
        /*
         * configuration objectClasses (fake)
         */
@@ -1650,7 +2055,8 @@ monitor_back_initialize(
 
 int
 monitor_back_db_init(
-       BackendDB       *be )
+       BackendDB       *be,
+       ConfigReply     *c)
 {
        int                     rc;
        struct berval           dn = BER_BVC( SLAPD_MONITOR_DN ),
@@ -1661,23 +2067,24 @@ monitor_back_db_init(
        monitor_subsys_t        *ms;
 
        /*
-        * register subsys
+        * database monitor can be defined once only
         */
-       for ( ms = known_monitor_subsys; ms->mss_name != NULL; ms++ ) {
-               if ( monitor_back_register_subsys( ms ) ) {
-                       return -1;
+       if ( be_monitor != NULL ) {
+               if (c) {
+                       snprintf(c->msg, sizeof(c->msg),"only one monitor database allowed");
                }
+               return( -1 );
        }
+       be_monitor = be;
 
        /*
-        * database monitor can be defined once only
+        * register subsys
         */
-       if ( be_monitor != NULL ) {
-               Debug( LDAP_DEBUG_ANY,
-                       "only one monitor database is allowed\n", 0, 0, 0 );
-               return( -1 );
+       for ( ms = known_monitor_subsys; ms->mss_name != NULL; ms++ ) {
+               if ( monitor_back_register_subsys( ms ) ) {
+                       return -1;
+               }
        }
-       be_monitor = be;
 
        /* indicate system schema supported */
        SLAP_BFLAGS(be) |= SLAP_BFLAG_MONITOR;
@@ -1699,7 +2106,7 @@ monitor_back_db_init(
 
        be->be_private = &monitor_info;
 
-       be2 = select_backend( &ndn, 0, 0 );
+       be2 = select_backend( &ndn, 0 );
        if ( be2 != be ) {
                char    *type = be2->bd_info->bi_type;
 
@@ -1708,19 +2115,57 @@ monitor_back_db_init(
                        type = oi->oi_orig->bi_type;
                }
 
-               Debug( LDAP_DEBUG_ANY,
-                       "\"monitor\" database serving namingContext \"%s\" "
-                       "is hidden by \"%s\" database serving namingContext \"%s\".\n",
-                       pdn.bv_val, type, be2->be_nsuffix[ 0 ].bv_val );
+               if (c) {
+                       snprintf(c->msg, sizeof(c->msg),
+                                       "\"monitor\" database serving namingContext \"%s\" "
+                                       "is hidden by \"%s\" database serving namingContext \"%s\".\n",
+                                       pdn.bv_val, type, be2->be_nsuffix[ 0 ].bv_val );
+               }
                return -1;
        }
 
        return 0;
 }
 
+static void
+monitor_back_destroy_limbo_entry(
+       entry_limbo_t   *el,
+       int             dispose )
+{
+       if ( el->el_e ) {
+               entry_free( el->el_e );
+       }
+       if ( el->el_a ) {
+               attrs_free( el->el_a );
+       }
+       if ( !BER_BVISNULL( &el->el_nbase ) ) {
+               ber_memfree( el->el_nbase.bv_val );
+       }
+       if ( !BER_BVISNULL( &el->el_filter ) ) {
+               ber_memfree( el->el_filter.bv_val );
+       }
+
+       /* NOTE: callbacks are not copied; so only free them
+        * if disposing of */
+       if ( el->el_cb && dispose != 0 ) {
+               monitor_callback_t *next;
+
+               for ( ; el->el_cb; el->el_cb = next ) {
+                       next = el->el_cb->mc_next;
+                       if ( el->el_cb->mc_dispose ) {
+                               el->el_cb->mc_dispose( &el->el_cb->mc_private );
+                       }
+                       ch_free( el->el_cb );
+               }
+       }
+
+       ch_free( el );
+}
+
 int
 monitor_back_db_open(
-       BackendDB       *be )
+       BackendDB       *be,
+       ConfigReply     *cr)
 {
        monitor_info_t          *mi = (monitor_info_t *)be->be_private;
        struct monitor_subsys_t **ms;
@@ -1740,6 +2185,8 @@ monitor_back_db_open(
                " attributes, which must be explicitly requested."),
                BER_BVNULL };
 
+       int                     retcode = 0;
+
        assert( be_monitor != NULL );
        if ( be != be_monitor ) {
                be_monitor = be;
@@ -1919,76 +2366,86 @@ monitor_back_db_open(
        monitor_subsys_opened = 1;
 
        if ( mi->mi_entry_limbo ) {
-               entry_limbo_t   *el = (entry_limbo_t *)mi->mi_entry_limbo;
+               entry_limbo_t   *el = mi->mi_entry_limbo;
 
                for ( ; el; ) {
                        entry_limbo_t   *tmp;
+                       int             rc;
 
                        switch ( el->el_type ) {
                        case LIMBO_ENTRY:
-                               monitor_back_register_entry(
+                               rc = monitor_back_register_entry(
                                                el->el_e,
-                                               el->el_cb );
+                                               el->el_cb,
+                                               el->el_mss,
+                                               el->el_flags );
                                break;
 
                        case LIMBO_ENTRY_PARENT:
-                               monitor_back_register_entry_parent(
+                               rc = monitor_back_register_entry_parent(
                                                el->el_e,
                                                el->el_cb,
-                                               &el->el_base,
+                                               el->el_mss,
+                                               el->el_flags,
+                                               &el->el_nbase,
                                                el->el_scope,
                                                &el->el_filter );
                                break;
                                
 
                        case LIMBO_ATTRS:
-                               monitor_back_register_entry_attrs(
-                                               &el->el_ndn,
+                               rc = monitor_back_register_entry_attrs(
+                                               el->el_ndn,
                                                el->el_a,
                                                el->el_cb,
-                                               &el->el_base,
+                                               &el->el_nbase,
                                                el->el_scope,
                                                &el->el_filter );
                                break;
 
                        case LIMBO_CB:
-                               monitor_back_register_entry_callback(
-                                               &el->el_ndn,
+                               rc = monitor_back_register_entry_callback(
+                                               el->el_ndn,
                                                el->el_cb,
-                                               &el->el_base,
+                                               &el->el_nbase,
                                                el->el_scope,
                                                &el->el_filter );
                                break;
 
+                       case LIMBO_BACKEND:
+                               rc = monitor_back_register_backend( el->el_bi );
+                               break;
+
+                       case LIMBO_DATABASE:
+                               rc = monitor_back_register_database( el->el_be, el->el_ndn );
+                               break;
+
+                       case LIMBO_OVERLAY_INFO:
+                               rc = monitor_back_register_overlay_info( el->el_on );
+                               break;
+
+                       case LIMBO_OVERLAY:
+                               rc = monitor_back_register_overlay( el->el_be );
+                               break;
+
                        default:
                                assert( 0 );
                        }
 
-                       if ( el->el_e ) {
-                               entry_free( el->el_e );
-                       }
-                       if ( el->el_a ) {
-                               attrs_free( el->el_a );
-                       }
-                       if ( !BER_BVISNULL( &el->el_ndn ) ) {
-                               ber_memfree( el->el_ndn.bv_val );
-                       }
-                       if ( !BER_BVISNULL( &el->el_base ) ) {
-                               ber_memfree( el->el_base.bv_val );
-                       }
-                       if ( !BER_BVISNULL( &el->el_filter ) ) {
-                               ber_memfree( el->el_filter.bv_val );
-                       }
-
                        tmp = el;
                        el = el->el_next;
-                       ch_free( tmp );
+                       monitor_back_destroy_limbo_entry( tmp, rc );
+
+                       if ( rc != 0 ) {
+                               /* try all, but report error at end */
+                               retcode = 1;
+                       }
                }
 
                mi->mi_entry_limbo = NULL;
        }
 
-       return( 0 );
+       return retcode;
 }
 
 int
@@ -2025,7 +2482,8 @@ monitor_back_db_config(
 
 int
 monitor_back_db_destroy(
-       BackendDB       *be )
+       BackendDB       *be,
+       ConfigReply     *cr)
 {
        monitor_info_t  *mi = ( monitor_info_t * )be->be_private;
 
@@ -2055,6 +2513,16 @@ monitor_back_db_destroy(
 
                ch_free( monitor_subsys );
        }
+
+       if ( mi->mi_entry_limbo ) {
+               entry_limbo_t   *el = mi->mi_entry_limbo;
+
+               for ( ; el; ) {
+                       entry_limbo_t *tmp = el;
+                       el = el->el_next;
+                       monitor_back_destroy_limbo_entry( tmp, 1 );
+               }
+       }
        
        ldap_pvt_thread_mutex_destroy( &monitor_info.mi_cache_mutex );