]> git.sur5r.net Git - openldap/commitdiff
dynlist updates from HEAD
authorKurt Zeilenga <kurt@openldap.org>
Tue, 20 Dec 2005 20:00:00 +0000 (20:00 +0000)
committerKurt Zeilenga <kurt@openldap.org>
Tue, 20 Dec 2005 20:00:00 +0000 (20:00 +0000)
CHANGES
doc/man/man5/slapo-dynlist.5
servers/slapd/config.h
servers/slapd/overlays/dynlist.c

diff --git a/CHANGES b/CHANGES
index d1d6c4db33b6e3f3088f536ef3d6bebf470661f9..b7b949cd5c4ca9e8e1adc248fb5f1142a07462ec 100644 (file)
--- a/CHANGES
+++ b/CHANGES
@@ -10,6 +10,7 @@ OpenLDAP 2.3.14 Engineering
        Fixed slapd-bdb/hdb cn=config olcDbIndex modify/replace (ITS#4262)
        Fixed slapd-bdb/hdb lockup issue (ITS#4184)
        Fixed slapo-rwm static DN free bug (ITS#4248)
+       Updated slapo-dynlist (ITS#3756,4224)
        Build environment
                Updated test033-glue-syncrepl (ITS#4264)
 
index fc0cb20d2e84010f8a947be5822147ca1b6535b0..a4f2a062a09a4fad46b44e640b72123912fa3f43 100644 (file)
@@ -17,7 +17,11 @@ the LDAP URI-valued occurrences of a specific attribute are
 expanded into the corresponding entries, and the values
 of the attributes listed in the URI are added to the original
 entry.
-No recursion is currently allowed, to avoid potential infinite loops.
+No recursion is allowed, to avoid potential infinite loops.
+The resulting entry must comply with the LDAP data model, so constraints
+are enforced.
+For example, if a \fISINGLE-VALUE\fP attribute is listed,
+only the first value results in the final entry.
 
 .SH CONFIGURATION
 The config directives that are specific to the
@@ -35,32 +39,45 @@ or to the frontend, if used before any database instantiation; see
 for details.
 
 .LP
-These 
+This
 .B slapd.conf
-configuration options apply to the dynlist overlay. They must appear
-after the
+configuration option is define for the dynlist overlay. It may have multiple 
+occurrences, and it must appear after the
 .B overlay
 directive.
 .TP
-.B dynlist-oc <objectClass>
-The name of the objectClass that triggers the dynamic expansion of the
-data.  This statement is required.
-.TP
-.B dynlist-ad <attributeName>
-The name of the attributeDescription that holds the LDAP URI values that
-will expand; if none is present, no expansion occurs.  If the intersection
-of the attributes requested by the search operation (or the asserted attribute
-for compares) and the attributes listed in the URI is empty, no expansion 
-occurs for that specific URI.  This statement is required.
-.TP
-.B dynlist-member-ad <attributeName>
-The name of the attributeDescription that will list the DN of the entries
-resulting from the internal search.  This statement is optional and, if
-present, changes the behavior of the overlay into that of a dynamic group.
-The <attrs> portion of the URI is ignored, and the DNs of all the entries 
-resulting from the expansion of the URI are listed as values of this 
-attribute.
+.B dynlist-attrset <group-oc> <URL-ad> [<member-ad>]
+The value 
+.B <group-oc> 
+is the name of the objectClass that triggers the dynamic expansion of the
+data.
 
+The value
+.B <URL-ad>
+is the name of the attributeDescription that cointains the URI that is 
+expanded by the overlay; if none is present, no expansion occurs.
+If the intersection of the attributes requested by the search operation 
+(or the asserted attribute for compares) and the attributes listed 
+in the URI is empty, no expansion occurs for that specific URI.
+It must be a subtype of \fIlabeledURI\fP.
+
+The value
+.B <member-ad>
+is optional; if present, the overlay behaves as a dynamic group: this
+attribute will list the DN of the entries resulting from the internal search.
+In this case, the <attrs> portion of the URI must be absent, and the DNs 
+of all the entries resulting from the expansion of the URI are listed
+as values of this attribute.
+Compares that assert the value of the
+.B <member-ad>
+attribute of entries with 
+.B <group-oc>
+objectClass apply as if the DN of the entries resulting from the expansion 
+of the URI were present in the 
+.B <group-oc> 
+entry as values of the
+.B <member-ad>
+attribute.
 .LP
 The dynlist overlay may be used with any backend, but it is mainly 
 intended for use with local storage backends.
@@ -81,8 +98,7 @@ entry; first of all, make sure that slapd.conf contains the directives:
     # ...
 
     overlay dynlist
-    dynlist-oc groupOfURLs
-    dynlist-ad memberURL
+    dynlist-attrset groupOfURLs memberURL
 .fi
 .LP
 and that slapd loads dynlist.la, if compiled as a run-time module;
@@ -98,6 +114,22 @@ then add to the database an entry like
 If no <attrs> are provided in the URI, all (non-operational) attributes are
 collected.
 
+This example implements the dynamic group feature on the 
+.B member
+attribute:
+
+.LP
+.nf
+    include /path/to/dyngroup.schema
+    # ...
+
+    database <database>
+    # ...
+
+    overlay dynlist
+    dynlist-attrset groupOfURLs memberURL member
+.fi
+.LP
 
 .SH FILES
 .TP
@@ -106,6 +138,10 @@ default slapd configuration file
 .SH SEE ALSO
 .BR slapd.conf (5),
 .BR slapd (8).
+The
+.BR slapo-dynlist (5)
+overlay supports dynamic configuration via
+.BR back-config .
 .SH ACKNOWLEDGEMENTS
 .P
 This module was written in 2004 by Pierangelo Masarati for SysNet s.n.c.
index b5085e2a15c4be974fcb2a0a040f8d0537560890..735471a1fc591bfba86d95fa00f4d4f7506129ae 100644 (file)
@@ -181,4 +181,6 @@ int config_shadow( ConfigArgs *c, int flag );
 #define        config_check_userland(last) \
        assert( ( ( (last) - 1 ) & ARGS_USERLAND ) == ( (last) - 1 ) );
 
+#define        SLAP_X_ORDERED_FMT      "{%d}"
+
 #endif /* CONFIG_H */
index 5ccccaf3b965ab97227c47b042ecfe9296568c95..8714577029efe1159fd7e9d33b3aad8cdb533192 100644 (file)
 
 #ifdef SLAPD_OVER_DYNLIST
 
+#if LDAP_VENDOR_VERSION_MINOR != X && LDAP_VENDOR_VERSION_MINOR < 3
+#define OL_2_2_COMPAT
+#elif defined(LDAP_DEVEL) && SLAPD_OVER_DYNGROUP != SLAPD_MOD_STATIC
+#define TAKEOVER_DYNGROUP
+#endif
+
 #include <stdio.h>
 
 #include <ac/string.h>
 
 #include "slap.h"
+#ifndef OL_2_2_COMPAT
+#include "config.h"
+#endif
 #include "lutil.h"
 
 /* FIXME: the code differs if SLAP_OPATTRS is defined or not;
@@ -35,7 +44,7 @@
 /* FIXME: slap_anlist_no_attrs was introduced in 2.3; here it
  * is anticipated to allow using this overlay with 2.2. */
 
-#if LDAP_VENDOR_VERSION_MINOR != X && LDAP_VENDOR_VERSION_MINOR < 3
+#ifdef OL_2_2_COMPAT
 static AttributeName anlist_no_attrs[] = {
        { BER_BVC( LDAP_NO_ATTRS ), NULL, 0, NULL },
        { BER_BVNULL, NULL, 0, NULL }
@@ -44,18 +53,19 @@ static AttributeName anlist_no_attrs[] = {
 static AttributeName *slap_anlist_no_attrs = anlist_no_attrs;
 #endif
 
-typedef struct dynlist_info {
+typedef struct dynlist_info_t {
        ObjectClass             *dli_oc;
        AttributeDescription    *dli_ad;
        AttributeDescription    *dli_member_ad;
        struct berval           dli_default_filter;
-} dynlist_info;
+       struct dynlist_info_t   *dli_next;
+} dynlist_info_t;
 
-static int
+static dynlist_info_t *
 dynlist_is_dynlist( Operation *op, SlapReply *rs )
 {
        slap_overinst   *on = (slap_overinst *)op->o_bd->bd_info;
-       dynlist_info    *dli = (dynlist_info *)on->on_bi.bi_private;
+       dynlist_info_t  *dli = (dynlist_info_t *)on->on_bi.bi_private;
 
        Attribute       *a;
 
@@ -64,26 +74,28 @@ dynlist_is_dynlist( Operation *op, SlapReply *rs )
                /* FIXME: objectClass must be present; for non-storage
                 * backends, like back-ldap, it needs to be added
                 * to the requested attributes */
-               return 0;
+               return NULL;
        }
 
-       if ( value_find_ex( slap_schema.si_ad_objectClass, 
-                       SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
-                       SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
-                       a->a_nvals, &dli->dli_oc->soc_cname,
-                       op->o_tmpmemctx ) == 0 )
-       {
-               return 1;
+       for ( ; dli; dli = dli->dli_next ) {
+               if ( value_find_ex( slap_schema.si_ad_objectClass, 
+                               SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
+                               SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
+                               a->a_nvals, &dli->dli_oc->soc_cname,
+                               op->o_tmpmemctx ) == 0 )
+               {
+                       return dli;
+               }
        }
 
-       return 0;
+       return NULL;
 }
 
 static int
 dynlist_make_filter( Operation *op, struct berval *oldf, struct berval *newf )
 {
        slap_overinst   *on = (slap_overinst *)op->o_bd->bd_info;
-       dynlist_info    *dli = (dynlist_info *)on->on_bi.bi_private;
+       dynlist_info_t  *dli = (dynlist_info_t *)on->on_bi.bi_private;
 
        char            *ptr;
 
@@ -109,7 +121,7 @@ dynlist_make_filter( Operation *op, struct berval *oldf, struct berval *newf )
 }
 
 typedef struct dynlist_sc_t {
-       dynlist_info    *dlc_dli;
+       dynlist_info_t    *dlc_dli;
        Entry           *dlc_e;
 } dynlist_sc_t;
 
@@ -278,11 +290,8 @@ done:;
 }
        
 static int
-dynlist_send_entry( Operation *op, SlapReply *rs )
+dynlist_send_entry( Operation *op, SlapReply *rs, dynlist_info_t *dli )
 {
-       slap_overinst   *on = (slap_overinst *)op->o_bd->bd_info;
-       dynlist_info    *dli = (dynlist_info *)on->on_bi.bi_private;
-
        Attribute       *a;
        slap_callback   cb;
        Operation       o = *op;
@@ -367,6 +376,8 @@ dynlist_send_entry( Operation *op, SlapReply *rs )
                o.ors_scope = lud->lud_scope;
 
                if ( dli->dli_member_ad != NULL ) {
+                       /* if ( lud->lud_attrs != NULL ),
+                        * the URL should be ignored */
                        o.ors_attrs = slap_anlist_no_attrs;
 
                } else if ( lud->lud_attrs == NULL ) {
@@ -493,82 +504,147 @@ static int
 dynlist_compare( Operation *op, SlapReply *rs )
 {
        slap_overinst   *on = (slap_overinst *)op->o_bd->bd_info;
-       dynlist_info    *dli = (dynlist_info *)on->on_bi.bi_private;
+       dynlist_info_t  *dli = (dynlist_info_t *)on->on_bi.bi_private;
+
+       for ( ; dli != NULL; dli = dli->dli_next ) {
+               if ( op->oq_compare.rs_ava->aa_desc == dli->dli_member_ad ) {
+                       /* This compare is for one of the attributes we're
+                        * interested in. We'll use slapd's existing dyngroup
+                        * evaluator to get the answer we want.
+                        */
+                       int cache = op->o_do_not_cache;
+                               
+                       op->o_do_not_cache = 1;
+                       rs->sr_err = backend_group( op, NULL, &op->o_req_ndn,
+                               &op->oq_compare.rs_ava->aa_value, dli->dli_oc, dli->dli_ad );
+                       op->o_do_not_cache = cache;
+                       switch ( rs->sr_err ) {
+                       case LDAP_SUCCESS:
+                               rs->sr_err = LDAP_COMPARE_TRUE;
+                               break;
+
+                       case LDAP_NO_SUCH_OBJECT:
+                               /* NOTE: backend_group() returns noSuchObject
+                                * if op_ndn does not exist; however, since
+                                * dynamic list expansion means that the
+                                * member attribute is virtually present, the
+                                * non-existence of the asserted value implies
+                                * the assertion is FALSE rather than
+                                * UNDEFINED */
+                               rs->sr_err = LDAP_COMPARE_FALSE;
+                               break;
+                       }
 
-       Attribute       *a;
-       slap_callback   cb;
-       Operation       o = *op;
-       SlapReply       r = { REP_SEARCH };
-       AttributeName   an[2];
-       int             rc;
-       dynlist_sc_t    dlc = { 0 };
+                       return SLAP_CB_CONTINUE;
+               }
+       }
 
-       dlc.dlc_dli = dli;
-       cb.sc_private = &dlc;
-       cb.sc_response = dynlist_sc_save_entry;
-       cb.sc_cleanup = NULL;
-       cb.sc_next = NULL;
-       o.o_callback = &cb;
+       dli = (dynlist_info_t *)on->on_bi.bi_private;
+       for ( ; dli != NULL && rs->sr_err != LDAP_COMPARE_TRUE; dli = dli->dli_next ) {
+               Attribute       *a;
+               slap_callback   cb;
+               Operation       o = *op;
+               SlapReply       r = { REP_SEARCH };
+               AttributeName   an[2];
+               int             rc;
+               dynlist_sc_t    dlc = { 0 };
+               Entry           *e;
+
+               int cache = op->o_do_not_cache;
+               struct berval   op_dn = op->o_dn,
+                               op_ndn = op->o_ndn;
+               BackendDB       *op_bd = op->o_bd;
+
+               /* fetch the entry as rootdn (a hack to see if it exists
+                * and if it has the right objectClass) */
+               op->o_do_not_cache = 1;
+               op->o_dn = op->o_bd->be_rootdn;
+               op->o_ndn = op->o_bd->be_rootndn;
+               op->o_bd = select_backend( &op->o_req_ndn, 0, 0 );
+
+               r.sr_err = be_entry_get_rw( op, &op->o_req_ndn,
+                       dli->dli_oc, NULL, 0, &e );
+               if ( e != NULL ) {
+                       be_entry_release_r( op, e );
+               }
+               op->o_do_not_cache = cache;
+               op->o_dn = op_dn;
+               op->o_ndn = op_ndn;
+               op->o_bd = op_bd;
+               if ( r.sr_err != LDAP_SUCCESS ) {
+                       continue;
+               }
 
-       o.o_tag = LDAP_REQ_SEARCH;
-       o.ors_limit = NULL;
-       o.ors_tlimit = SLAP_NO_LIMIT;
-       o.ors_slimit = SLAP_NO_LIMIT;
+               /* if the entry has the right objectClass, generate
+                * the dynamic list and compare */
+               dlc.dlc_dli = dli;
+               cb.sc_private = &dlc;
+               cb.sc_response = dynlist_sc_save_entry;
+               cb.sc_cleanup = NULL;
+               cb.sc_next = NULL;
+               o.o_callback = &cb;
 
-       o.o_bd = select_backend( &o.o_req_ndn, 0, 1 );
-       if ( !o.o_bd || !o.o_bd->be_search ) {
-               return SLAP_CB_CONTINUE;
-       }
+               o.o_tag = LDAP_REQ_SEARCH;
+               o.ors_limit = NULL;
+               o.ors_tlimit = SLAP_NO_LIMIT;
+               o.ors_slimit = SLAP_NO_LIMIT;
 
-       BER_BVSTR( &o.ors_filterstr, "(objectClass=*)" );
-       o.ors_filter = str2filter_x( op, o.ors_filterstr.bv_val );
-       if ( o.ors_filter == NULL ) {
-               /* FIXME: error? */
-               return SLAP_CB_CONTINUE;
-       }
+               o.o_bd = select_backend( &o.o_req_ndn, 0, 1 );
+               if ( !o.o_bd || !o.o_bd->be_search ) {
+                       return SLAP_CB_CONTINUE;
+               }
 
-       o.ors_scope = LDAP_SCOPE_BASE;
-       o.ors_deref = LDAP_DEREF_NEVER;
-       an[0].an_name = op->orc_ava->aa_desc->ad_cname;
-       an[0].an_desc = op->orc_ava->aa_desc;
-       BER_BVZERO( &an[1].an_name );
-       o.ors_attrs = an;
-       o.ors_attrsonly = 0;
+               BER_BVSTR( &o.ors_filterstr, "(objectClass=*)" );
+               o.ors_filter = str2filter_x( op, o.ors_filterstr.bv_val );
+               if ( o.ors_filter == NULL ) {
+                       /* FIXME: error? */
+                       return SLAP_CB_CONTINUE;
+               }
 
-       rc = o.o_bd->be_search( &o, &r );
-       filter_free_x( &o, o.ors_filter );
+               o.ors_scope = LDAP_SCOPE_BASE;
+               o.ors_deref = LDAP_DEREF_NEVER;
+               an[0].an_name = op->orc_ava->aa_desc->ad_cname;
+               an[0].an_desc = op->orc_ava->aa_desc;
+               BER_BVZERO( &an[1].an_name );
+               o.ors_attrs = an;
+               o.ors_attrsonly = 0;
 
-       if ( rc != 0 ) {
-               return rc;
-       }
+               rc = o.o_bd->be_search( &o, &r );
+               filter_free_x( &o, o.ors_filter );
 
-       if ( dlc.dlc_e != NULL ) {
-               r.sr_entry = dlc.dlc_e;
-       }
+               if ( rc != 0 ) {
+                       return rc;
+               }
 
-       if ( r.sr_err != LDAP_SUCCESS || r.sr_entry == NULL ) {
-               /* error? */
-               return SLAP_CB_CONTINUE;
-       }
+               if ( dlc.dlc_e != NULL ) {
+                       r.sr_entry = dlc.dlc_e;
+               }
 
-       /* if we're here, we got a match... */
-       rs->sr_err = LDAP_COMPARE_FALSE;
-       for ( a = attrs_find( r.sr_entry->e_attrs, op->orc_ava->aa_desc );
-               a != NULL;
-               a = attrs_find( a->a_next, op->orc_ava->aa_desc ) )
-       {
-               if ( value_find_ex( op->orc_ava->aa_desc,
-                       SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
-                               SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
-                       a->a_nvals, &op->orc_ava->aa_value, op->o_tmpmemctx ) == 0 )
+               if ( r.sr_err != LDAP_SUCCESS || r.sr_entry == NULL ) {
+                       /* error? */
+                       return SLAP_CB_CONTINUE;
+               }
+
+               for ( a = attrs_find( r.sr_entry->e_attrs, op->orc_ava->aa_desc );
+                       a != NULL;
+                       a = attrs_find( a->a_next, op->orc_ava->aa_desc ) )
                {
-                       rs->sr_err = LDAP_COMPARE_TRUE;
-                       break;
+                       /* if we're here, we got a match... */
+                       rs->sr_err = LDAP_COMPARE_FALSE;
+
+                       if ( value_find_ex( op->orc_ava->aa_desc,
+                               SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
+                                       SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
+                               a->a_nvals, &op->orc_ava->aa_value, op->o_tmpmemctx ) == 0 )
+                       {
+                               rs->sr_err = LDAP_COMPARE_TRUE;
+                               break;
+                       }
                }
-       }
 
-       if ( r.sr_flags & REP_ENTRY_MUSTBEFREED ) {
-               entry_free( r.sr_entry );
+               if ( r.sr_flags & REP_ENTRY_MUSTBEFREED ) {
+                       entry_free( r.sr_entry );
+               }
        }
 
        return SLAP_CB_CONTINUE;
@@ -577,12 +653,15 @@ dynlist_compare( Operation *op, SlapReply *rs )
 static int
 dynlist_response( Operation *op, SlapReply *rs )
 {
+       dynlist_info_t  *dli;
+
        switch ( op->o_tag ) {
        case LDAP_REQ_SEARCH:
                if ( rs->sr_type == REP_SEARCH && !get_manageDSAit( op ) )
                {
-                       if ( dynlist_is_dynlist( op, rs ) ) {
-                               return dynlist_send_entry( op, rs );
+                       dli = dynlist_is_dynlist( op, rs );
+                       if ( dli != NULL ) {
+                               return dynlist_send_entry( op, rs, dli );
                        }
                }
                break;
@@ -610,6 +689,30 @@ dynlist_response( Operation *op, SlapReply *rs )
        return SLAP_CB_CONTINUE;
 }
 
+static int
+dynlist_build_def_filter( dynlist_info_t *dli )
+{
+       char    *ptr;
+
+       dli->dli_default_filter.bv_len = STRLENOF( "(!(objectClass=" "))" )
+               + dli->dli_oc->soc_cname.bv_len;
+       dli->dli_default_filter.bv_val = SLAP_MALLOC( dli->dli_default_filter.bv_len + 1 );
+       if ( dli->dli_default_filter.bv_val == NULL ) {
+               Debug( LDAP_DEBUG_ANY, "dynlist_db_open: malloc failed.\n",
+                       0, 0, 0 );
+               return -1;
+       }
+
+       ptr = lutil_strcopy( dli->dli_default_filter.bv_val, "(!(objectClass=" );
+       ptr = lutil_strcopy( ptr, dli->dli_oc->soc_cname.bv_val );
+       ptr = lutil_strcopy( ptr, "))" );
+
+       assert( dli->dli_default_filter.bv_len == ptr - dli->dli_default_filter.bv_val );
+
+       return 0;
+}
+
+#ifdef OL_2_2_COMPAT
 static int
 dynlist_db_config(
        BackendDB       *be,
@@ -619,52 +722,196 @@ dynlist_db_config(
        char            **argv )
 {
        slap_overinst   *on = (slap_overinst *)be->bd_info;
-       dynlist_info    *dli = (dynlist_info *)on->on_bi.bi_private;
 
        int             rc = 0;
 
-       if ( strcasecmp( argv[0], "dynlist-oc" ) == 0 ) {
-               if ( argc != 2 ) {
-                       fprintf( stderr, "dynlist-oc <oc>\n" );
+       if ( strcasecmp( argv[0], "dynlist-attrset" ) == 0 ) {
+               dynlist_info_t          **dlip;
+               ObjectClass             *oc;
+               AttributeDescription    *ad = NULL,
+                                       *member_ad = NULL;
+               const char              *text;
+
+               if ( argc < 3 || argc > 4 ) {
+                       Debug( LDAP_DEBUG_ANY, "%s: line %d: "
+                               "\"dynlist-attrset <oc> <URL-ad> [<member-ad>]\": "
+                               "invalid arg number #%d.\n",
+                               fname, lineno, argc );
                        return 1;
                }
-               dli->dli_oc = oc_find( argv[1] );
-               if ( dli->dli_oc == NULL ) {
-                       fprintf( stderr, "dynlist-oc <oc>: "
-                                       "unable to find ObjectClass "
-                                       "\"%s\"\n", argv[1] );
+
+               oc = oc_find( argv[1] );
+               if ( oc == NULL ) {
+                       Debug( LDAP_DEBUG_ANY, "%s: line %d: "
+                               "\"dynlist-attrset <oc> <URL-ad> [<member-ad>]\": "
+                               "unable to find ObjectClass \"%s\"\n",
+                               fname, lineno, argv[ 1 ] );
                        return 1;
                }
 
-       } else if ( strcasecmp( argv[0], "dynlist-ad" ) == 0 ) {
-               const char      *text;
+               rc = slap_str2ad( argv[2], &ad, &text );
+               if ( rc != LDAP_SUCCESS ) {
+                       Debug( LDAP_DEBUG_ANY, "%s: line %d: "
+                               "\"dynlist-attrset <oc> <URL-ad> [<member-ad>]\": "
+                               "unable to find AttributeDescription \"%s\"\n",
+                               fname, lineno, argv[2] );
+                       return 1;
+               }
 
-               if ( argc != 2 ) {
-                       fprintf( stderr, "dynlist-ad <ad>\n" );
+               if ( !is_at_subtype( ad->ad_type, slap_schema.si_ad_labeledURI->ad_type ) ) {
+                       Debug( LDAP_DEBUG_ANY, "%s: line %d: "
+                               "\"dynlist-attrset <oc> <URL-ad> [<member-ad>]\": "
+                               "AttributeDescription \"%s\" "
+                               "must be a subtype of \"labeledURI\"\n",
+                               fname, lineno, argv[2] );
                        return 1;
                }
-               dli->dli_ad = NULL;
-               rc = slap_str2ad( argv[1], &dli->dli_ad, &text );
-               if ( rc != LDAP_SUCCESS ) {
-                       fprintf( stderr, "dynlist-ad <ad>: "
-                                       "unable to find AttributeDescription "
-                                       "\"%s\"\n", argv[1] );
+
+               if ( argc == 4 ) {
+                       rc = slap_str2ad( argv[3], &member_ad, &text );
+                       if ( rc != LDAP_SUCCESS ) {
+                               Debug( LDAP_DEBUG_ANY, "%s: line %d: "
+                                       "\"dynlist-attrset <oc> <URL-ad> [<member-ad>]\": "
+                                       "unable to find AttributeDescription \"%s\"\n",
+                                       fname, lineno, argv[3] );
+                               return 1;
+                       }
+               }
+
+               for ( dlip = (dynlist_info_t **)&on->on_bi.bi_private;
+                       *dlip; dlip = &(*dlip)->dli_next )
+               {
+                       /* The check on objectClass may be relaxed */
+#if 0
+                       if ( (*dlip)->dli_oc == oc ) {
+                               Debug( LDAP_DEBUG_ANY, "%s: line %d: "
+                                       "\"dynlist-attrset <oc> <URL-ad> [<member-ad>]\": "
+                                       "objectClass \"%s\" already mapped.\n",
+                                       fname, lineno, oc->soc_cname.bv_val );
+                               return 1;
+                       }
+#endif
+
+                       if ( (*dlip)->dli_ad == ad ) {
+                               Debug( LDAP_DEBUG_ANY, "%s: line %d: "
+                                       "\"dynlist-attrset <oc> <URL-ad> [<member-ad>]\": "
+                                       "URL attributeDescription \"%s\" already mapped.\n",
+                                       fname, lineno, ad->ad_cname.bv_val );
+                               return 1;
+                       }
+
+                       if ( member_ad != NULL && (*dlip)->dli_member_ad == member_ad ) {
+                               Debug( LDAP_DEBUG_ANY, "%s: line %d: "
+                                       "\"dynlist-attrset <oc> <URL-ad> [<member-ad>]\": "
+                                       "member attributeDescription \"%s\" already mapped.\n",
+                                       fname, lineno, member_ad->ad_cname.bv_val );
+                               return 1;
+                       }
+               }
+
+               *dlip = (dynlist_info_t *)ch_calloc( 1, sizeof( dynlist_info_t ) );
+               (*dlip)->dli_oc = oc;
+               (*dlip)->dli_ad = ad;
+               (*dlip)->dli_member_ad = member_ad;
+
+               if ( dynlist_build_def_filter( *dlip ) ) {
+                       ch_free( *dlip );
+                       *dlip = NULL;
                        return 1;
                }
 
-       } else if ( strcasecmp( argv[0], "dynlist-member-ad" ) == 0 ) {
-               const char      *text;
+       /* allow dyngroup syntax */
+       } else if ( strcasecmp( argv[0], "dynlist-attrpair" ) == 0 ) {
+               dynlist_info_t          **dlip;
+               ObjectClass             *oc;
+               AttributeDescription    *ad = NULL,
+                                       *member_ad = NULL;
+               const char              *text;
+
+               if ( argc != 3 ) {
+                       Debug( LDAP_DEBUG_ANY, "%s: line %d: "
+                               "\"dynlist-attrpair <member-ad> <URL-ad>\": "
+                               "invalid arg number #%d.\n",
+                               fname, lineno, argc );
+                       return 1;
+               }
 
-               if ( argc != 2 ) {
-                       fprintf( stderr, "dynlist-member-ad <ad>\n" );
+               oc = oc_find( "groupOfURLs" );
+               if ( oc == NULL ) {
+                       Debug( LDAP_DEBUG_ANY, "%s: line %d: "
+                               "\"dynlist-attrpair <member-ad> <URL-ad>\": "
+                               "unable to find default ObjectClass \"groupOfURLs\"\n",
+                               fname, lineno, 0 );
                        return 1;
                }
-               dli->dli_member_ad = NULL;
-               rc = slap_str2ad( argv[1], &dli->dli_member_ad, &text );
+
+               rc = slap_str2ad( argv[1], &member_ad, &text );
                if ( rc != LDAP_SUCCESS ) {
-                       fprintf( stderr, "dynlist-member-ad <ad>: "
-                                       "unable to find AttributeDescription "
-                                       "\"%s\"\n", argv[1] );
+                       Debug( LDAP_DEBUG_ANY, "%s: line %d: "
+                               "\"dynlist-attrpair <member-ad> <URL-ad>\": "
+                               "unable to find AttributeDescription \"%s\"\n",
+                               fname, lineno, argv[1] );
+                       return 1;
+               }
+
+               rc = slap_str2ad( argv[2], &ad, &text );
+               if ( rc != LDAP_SUCCESS ) {
+                       Debug( LDAP_DEBUG_ANY, "%s: line %d: "
+                               "\"dynlist-attrpair <member-ad> <URL-ad>\": "
+                               "unable to find AttributeDescription \"%s\"\n",
+                               fname, lineno, argv[2] );
+                       return 1;
+               }
+
+               if ( !is_at_subtype( ad->ad_type, slap_schema.si_ad_labeledURI->ad_type ) ) {
+                       Debug( LDAP_DEBUG_ANY, "%s: line %d: "
+                               "\"dynlist-attrpair <member-ad> <URL-ad>\": "
+                               "AttributeDescription \"%s\" "
+                               "must be a subtype of \"labeledURI\"\n",
+                               fname, lineno, argv[2] );
+                       return 1;
+               }
+
+
+               for ( dlip = (dynlist_info_t **)&on->on_bi.bi_private;
+                       *dlip; dlip = &(*dlip)->dli_next )
+               {
+#if 0
+                       /* The check on objectClass may be relaxed */
+                       if ( (*dlip)->dli_oc == oc ) {
+                               Debug( LDAP_DEBUG_ANY, "%s: line %d: "
+                                       "\"dynlist-attrpair <member-ad> <URL-ad>\": "
+                                       "objectClass \"%s\" already mapped.\n",
+                                       fname, lineno, oc->soc_cname.bv_val );
+                               return 1;
+                       }
+#endif
+
+                       if ( (*dlip)->dli_ad == ad ) {
+                               Debug( LDAP_DEBUG_ANY, "%s: line %d: "
+                                       "\"dynlist-attrpair <member-ad> <URL-ad>\": "
+                                       "URL attributeDescription \"%s\" already mapped.\n",
+                                       fname, lineno, ad->ad_cname.bv_val );
+                               return 1;
+                       }
+
+                       if ( member_ad != NULL && (*dlip)->dli_member_ad == member_ad ) {
+                               Debug( LDAP_DEBUG_ANY, "%s: line %d: "
+                                       "\"dynlist-attrpair <member-ad> <URL-ad>\": "
+                                       "member attributeDescription \"%s\" already mapped.\n",
+                                       fname, lineno, member_ad->ad_cname.bv_val );
+                               return 1;
+                       }
+               }
+
+               *dlip = (dynlist_info_t *)ch_calloc( 1, sizeof( dynlist_info_t ) );
+               (*dlip)->dli_oc = oc;
+               (*dlip)->dli_ad = ad;
+               (*dlip)->dli_member_ad = member_ad;
+
+               if ( dynlist_build_def_filter( *dlip ) ) {
+                       ch_free( *dlip );
+                       *dlip = NULL;
                        return 1;
                }
 
@@ -675,51 +922,434 @@ dynlist_db_config(
        return rc;
 }
 
+#else
+enum {
+       DL_ATTRSET = 1,
+       DL_ATTRPAIR,
+       DL_ATTRPAIR_COMPAT,
+       DL_LAST
+};
+
+static ConfigDriver    dl_cfgen;
+
+static ConfigTable dlcfg[] = {
+       { "dynlist-attrset", "group-oc> <URL-ad> <member-ad",
+               3, 4, 0, ARG_MAGIC|DL_ATTRSET, dl_cfgen,
+               "( OLcfgOvAt:8.1 NAME 'olcDLattrSet' "
+                       "DESC 'Dynamic list: <group objectClass>, <URL attributeDescription>, <member attributeDescription>' "
+                       "EQUALITY caseIgnoreMatch "
+                       "SYNTAX OMsDirectoryString "
+                       "X-ORDERED 'VALUES' )",
+                       NULL, NULL },
+       { "dynlist-attrpair", "member-ad> <URL-ad",
+               3, 3, 0, ARG_MAGIC|DL_ATTRPAIR, dl_cfgen,
+                       NULL, NULL, NULL },
+#ifdef TAKEOVER_DYNGROUP
+       { "attrpair", "member-ad> <URL-ad",
+               3, 3, 0, ARG_MAGIC|DL_ATTRPAIR_COMPAT, dl_cfgen,
+                       NULL, NULL, NULL },
+#endif
+       { NULL, NULL, 0, 0, 0, ARG_IGNORED }
+};
+
+static ConfigOCs dlocs[] = {
+       { "( OLcfgOvOc:8.1 "
+               "NAME 'olcDynamicList' "
+               "DESC 'Dynamic list configuration' "
+               "SUP olcOverlayConfig "
+               "MAY olcDLattrSet )",
+               Cft_Overlay, dlcfg, NULL, NULL },
+       { NULL, 0, NULL }
+};
+
 static int
-dynlist_db_init(
-       BackendDB       *be )
+dl_cfgen( ConfigArgs *c )
 {
-       slap_overinst   *on = (slap_overinst *) be->bd_info;
-       dynlist_info    *dli;
+       slap_overinst   *on = (slap_overinst *)c->bi;
+       dynlist_info_t  *dli = (dynlist_info_t *)on->on_bi.bi_private;
+
+       int             rc = 0, i;
+
+       if ( c->op == SLAP_CONFIG_EMIT ) {
+               switch( c->type ) {
+               case DL_ATTRSET:
+                       for ( i = 0; dli; i++, dli = dli->dli_next ) {
+                               struct berval   bv;
+                               char            *ptr = c->msg;
+
+                               assert( dli->dli_oc != NULL );
+                               assert( dli->dli_ad != NULL );
+
+                               ptr += snprintf( c->msg, sizeof( c->msg ),
+                                       SLAP_X_ORDERED_FMT "%s %s", i,
+                                       dli->dli_oc->soc_cname.bv_val,
+                                       dli->dli_ad->ad_cname.bv_val );
+
+                               if ( dli->dli_member_ad != NULL ) {
+                                       ptr[ 0 ] = ' ';
+                                       ptr++;
+                                       ptr = lutil_strcopy( ptr, dli->dli_member_ad->ad_cname.bv_val );
+                               }
 
-       dli = (dynlist_info *)ch_malloc( sizeof( dynlist_info ) );
-       memset( dli, 0, sizeof( dynlist_info ) );
+                               bv.bv_val = c->msg;
+                               bv.bv_len = ptr - bv.bv_val;
+                               value_add_one( &c->rvalue_vals, &bv );
+                       }
+                       break;
 
-       on->on_bi.bi_private = (void *)dli;
+               case DL_ATTRPAIR_COMPAT:
+               case DL_ATTRPAIR:
+                       rc = 1;
+                       break;
 
-       return 0;
+               default:
+                       rc = 1;
+                       break;
+               }
+
+               return rc;
+
+       } else if ( c->op == LDAP_MOD_DELETE ) {
+               switch( c->type ) {
+               case DL_ATTRSET:
+                       if ( c->valx < 0 ) {
+                               dynlist_info_t  *dli_next;
+
+                               for ( dli_next = dli; dli_next; dli = dli_next ) {
+                                       dli_next = dli->dli_next;
+
+                                       ch_free( dli->dli_default_filter.bv_val );
+                                       ch_free( dli );
+                               }
+
+                               on->on_bi.bi_private = NULL;
+
+                       } else {
+                               dynlist_info_t  **dlip;
+
+                               for ( i = 0, dlip = (dynlist_info_t **)&on->on_bi.bi_private;
+                                       i < c->valx; i++ )
+                               {
+                                       if ( *dlip == NULL ) {
+                                               return 1;
+                                       }
+                                       dlip = &(*dlip)->dli_next;
+                               }
+
+                               dli = *dlip;
+                               *dlip = dli->dli_next;
+                               ch_free( dli->dli_default_filter.bv_val );
+                               ch_free( dli );
+
+                               dli = (dynlist_info_t *)on->on_bi.bi_private;
+                       }
+                       break;
+
+               case DL_ATTRPAIR_COMPAT:
+               case DL_ATTRPAIR:
+                       rc = 1;
+                       break;
+
+               default:
+                       rc = 1;
+                       break;
+               }
+
+               return 1;       /* FIXME */
+       }
+
+       switch( c->type ) {
+       case DL_ATTRSET: {
+               dynlist_info_t          **dlip,
+                                       *dli_next = NULL;
+               ObjectClass             *oc = NULL;
+               AttributeDescription    *ad = NULL,
+                                       *member_ad = NULL;
+               const char              *text;
+
+               oc = oc_find( c->argv[ 1 ] );
+               if ( oc == NULL ) {
+                       snprintf( c->msg, sizeof( c->msg ),
+                               "\"dynlist-attrset <oc> <URL-ad> [<member-ad>]\": "
+                               "unable to find ObjectClass \"%s\"",
+                               c->argv[ 1 ] );
+                       Debug( LDAP_DEBUG_ANY, "%s: %s.\n",
+                               c->log, c->msg, 0 );
+                       return 1;
+               }
+
+               rc = slap_str2ad( c->argv[ 2 ], &ad, &text );
+               if ( rc != LDAP_SUCCESS ) {
+                       snprintf( c->msg, sizeof( c->msg ),
+                               "\"dynlist-attrset <oc> <URL-ad> [<member-ad>]\": "
+                               "unable to find AttributeDescription \"%s\"",
+                               c->argv[ 2 ] );
+                       Debug( LDAP_DEBUG_ANY, "%s: %s.\n",
+                               c->log, c->msg, 0 );
+                       return 1;
+               }
+
+               if ( !is_at_subtype( ad->ad_type, slap_schema.si_ad_labeledURI->ad_type ) ) {
+                       snprintf( c->msg, sizeof( c->msg ),
+                               "\"dynlist-attrset <oc> <URL-ad> [<member-ad>]\": "
+                               "AttributeDescription \"%s\" "
+                               "must be a subtype of \"labeledURI\"",
+                               c->argv[ 2 ] );
+                       Debug( LDAP_DEBUG_ANY, "%s: %s.\n",
+                               c->log, c->msg, 0 );
+                       return 1;
+               }
+
+               if ( c->argc == 4 ) {
+                       rc = slap_str2ad( c->argv[ 3 ], &member_ad, &text );
+                       if ( rc != LDAP_SUCCESS ) {
+                               snprintf( c->msg, sizeof( c->msg ),
+                                       "\"dynlist-attrset <oc> <URL-ad> [<member-ad>]\": "
+                                       "unable to find AttributeDescription \"%s\"\n",
+                                       c->argv[ 3 ] );
+                               Debug( LDAP_DEBUG_ANY, "%s: %s.\n",
+                                       c->log, c->msg, 0 );
+                               return 1;
+                       }
+               }
+
+               for ( dlip = (dynlist_info_t **)&on->on_bi.bi_private;
+                       *dlip; dlip = &(*dlip)->dli_next )
+               {
+                       /* The check on objectClass may be relaxed */
+#if 0
+                       if ( (*dlip)->dli_oc == oc ) {
+                               snprintf( c->msg, sizeof( c->msg ),
+                                       "\"dynlist-attrset <oc> <URL-ad> [<member-ad>]\": "
+                                       "objectClass \"%s\" already mapped.\n",
+                                       oc->soc_cname.bv_val );
+                               Debug( LDAP_DEBUG_ANY, "%s: %s.\n",
+                                       c->log, c->msg, 0 );
+                               return 1;
+                       }
+#endif
+
+                       if ( (*dlip)->dli_ad == ad ) {
+                               snprintf( c->msg, sizeof( c->msg ),
+                                       "\"dynlist-attrset <oc> <URL-ad> [<member-ad>]\": "
+                                       "URL attributeDescription \"%s\" already mapped.\n",
+                                       ad->ad_cname.bv_val );
+                               Debug( LDAP_DEBUG_ANY, "%s: %s.\n",
+                                       c->log, c->msg, 0 );
+                               return 1;
+                       }
+
+                       if ( member_ad != NULL && (*dlip)->dli_member_ad == member_ad ) {
+                               snprintf( c->msg, sizeof( c->msg ),
+                                       "\"dynlist-attrset <oc> <URL-ad> [<member-ad>]\": "
+                                       "member attributeDescription \"%s\" already mapped.\n",
+                                       member_ad->ad_cname.bv_val );
+                               Debug( LDAP_DEBUG_ANY, "%s: %s.\n",
+                                       c->log, c->msg, 0 );
+                               return 1;
+                       }
+               }
+
+               if ( c->valx > 0 ) {
+                       int     i;
+
+                       for ( i = 0, dlip = (dynlist_info_t **)&on->on_bi.bi_private;
+                               i < c->valx; i++ )
+                       {
+                               if ( *dlip == NULL ) {
+                                       snprintf( c->msg, sizeof( c->msg ),
+                                               "\"dynlist-attrset <oc> <URL-ad> [<member-ad>]\": "
+                                               "invalid index {%d}\n",
+                                               c->valx );
+                                       Debug( LDAP_DEBUG_ANY, "%s: %s.\n",
+                                               c->log, c->msg, 0 );
+                                       return 1;
+                               }
+                               dlip = &(*dlip)->dli_next;
+                       }
+                       dli_next = *dlip;
+
+               } else {
+                       for ( dlip = (dynlist_info_t **)&on->on_bi.bi_private;
+                               *dlip; dlip = &(*dlip)->dli_next )
+                               /* goto last */;
+               }
+
+               *dlip = (dynlist_info_t *)ch_calloc( 1, sizeof( dynlist_info_t ) );
+
+               (*dlip)->dli_oc = oc;
+               (*dlip)->dli_ad = ad;
+               (*dlip)->dli_member_ad = member_ad;
+               (*dlip)->dli_next = dli_next;
+
+               rc = dynlist_build_def_filter( *dlip );
+
+               } break;
+
+       case DL_ATTRPAIR_COMPAT:
+               snprintf( c->msg, sizeof( c->msg ),
+                       "warning: \"attrpair\" only supported for limited "
+                       "backward compatibility with overlay \"dyngroup\"" );
+               Debug( LDAP_DEBUG_ANY, "%s: %s.\n", c->log, c->msg, 0 );
+               /* fallthru */
+
+       case DL_ATTRPAIR: {
+               dynlist_info_t          **dlip;
+               ObjectClass             *oc = NULL;
+               AttributeDescription    *ad = NULL,
+                                       *member_ad = NULL;
+               const char              *text;
+
+               oc = oc_find( "groupOfURLs" );
+               if ( oc == NULL ) {
+                       snprintf( c->msg, sizeof( c->msg ),
+                               "\"dynlist-attrpair <member-ad> <URL-ad>\": "
+                               "unable to find default ObjectClass \"groupOfURLs\"" );
+                       Debug( LDAP_DEBUG_ANY, "%s: %s.\n",
+                               c->log, c->msg, 0 );
+                       return 1;
+               }
+
+               rc = slap_str2ad( c->argv[ 1 ], &member_ad, &text );
+               if ( rc != LDAP_SUCCESS ) {
+                       snprintf( c->msg, sizeof( c->msg ),
+                               "\"dynlist-attrpair <member-ad> <URL-ad>\": "
+                               "unable to find AttributeDescription \"%s\"",
+                               c->argv[ 1 ] );
+                       Debug( LDAP_DEBUG_ANY, "%s: %s.\n",
+                               c->log, c->msg, 0 );
+                       return 1;
+               }
+
+               rc = slap_str2ad( c->argv[ 2 ], &ad, &text );
+               if ( rc != LDAP_SUCCESS ) {
+                       snprintf( c->msg, sizeof( c->msg ),
+                               "\"dynlist-attrpair <member-ad> <URL-ad>\": "
+                               "unable to find AttributeDescription \"%s\"\n",
+                               c->argv[ 2 ] );
+                       Debug( LDAP_DEBUG_ANY, "%s: %s.\n",
+                               c->log, c->msg, 0 );
+                       return 1;
+               }
+
+               if ( !is_at_subtype( ad->ad_type, slap_schema.si_ad_labeledURI->ad_type ) ) {
+                       snprintf( c->msg, sizeof( c->msg ),
+                               "\"dynlist-attrset <oc> <URL-ad> [<member-ad>]\": "
+                               "AttributeDescription \"%s\" "
+                               "must be a subtype of \"labeledURI\"",
+                               c->argv[ 2 ] );
+                       Debug( LDAP_DEBUG_ANY, "%s: %s.\n",
+                               c->log, c->msg, 0 );
+                       return 1;
+               }
+
+               for ( dlip = (dynlist_info_t **)&on->on_bi.bi_private;
+                       *dlip; dlip = &(*dlip)->dli_next )
+               {
+                       /* The check on objectClass may be relaxed */
+#if 0
+                       if ( (*dlip)->dli_oc == oc ) {
+                               snprintf( c->msg, sizeof( c->msg ),
+                                       "\"dynlist-attrpair <member-ad> <URL-ad>\": "
+                                       "objectClass \"%s\" already mapped.\n",
+                                       oc->soc_cname.bv_val );
+                               Debug( LDAP_DEBUG_ANY, "%s: %s.\n",
+                                       c->log, c->msg, 0 );
+                               return 1;
+                       }
+#endif
+
+                       if ( (*dlip)->dli_ad == ad ) {
+                               snprintf( c->msg, sizeof( c->msg ),
+                                       "\"dynlist-attrpair <member-ad> <URL-ad>\": "
+                                       "URL attributeDescription \"%s\" already mapped.\n",
+                                       ad->ad_cname.bv_val );
+                               Debug( LDAP_DEBUG_ANY, "%s: %s.\n",
+                                       c->log, c->msg, 0 );
+                               return 1;
+                       }
+
+                       if ( member_ad != NULL && (*dlip)->dli_member_ad == member_ad ) {
+                               snprintf( c->msg, sizeof( c->msg ),
+                                       "\"dynlist-attrpair <member-ad> <URL-ad>\": "
+                                       "member attributeDescription \"%s\" already mapped.\n",
+                                       member_ad->ad_cname.bv_val );
+                               Debug( LDAP_DEBUG_ANY, "%s: %s.\n",
+                                       c->log, c->msg, 0 );
+                               return 1;
+                       }
+               }
+
+               *dlip = (dynlist_info_t *)ch_calloc( 1, sizeof( dynlist_info_t ) );
+
+               (*dlip)->dli_oc = oc;
+               (*dlip)->dli_ad = ad;
+               (*dlip)->dli_member_ad = member_ad;
+
+               rc = dynlist_build_def_filter( *dlip );
+
+               } break;
+
+       default:
+               rc = 1;
+               break;
+       }
+
+       return rc;
 }
+#endif
 
 static int
 dynlist_db_open(
        BackendDB       *be )
 {
-       slap_overinst   *on = (slap_overinst *) be->bd_info;
-       dynlist_info    *dli = (dynlist_info *)on->on_bi.bi_private;
-       ber_len_t       len;
-       char            *ptr;
-
-       if ( dli->dli_oc == NULL ) {
-               fprintf( stderr, "dynlist_db_open(): missing \"dynlist-oc <ObjectClass>\"\n" );
-               return -1;
+       slap_overinst           *on = (slap_overinst *) be->bd_info;
+       dynlist_info_t          *dli = (dynlist_info_t *)on->on_bi.bi_private;
+       ObjectClass             *oc = NULL;
+       AttributeDescription    *ad = NULL;
+
+       if ( dli == NULL ) {
+               dli = ch_calloc( 1, sizeof( dynlist_info_t ) );
+               on->on_bi.bi_private = (void *)dli;
        }
 
-       if ( dli->dli_ad == NULL ) {
-               fprintf( stderr, "dynlist_db_open(): missing \"dynlist-ad <AttributeDescription>\"\n" );
-               return -1;
-       }
+       for ( ; dli; dli = dli->dli_next ) {
+               const char      *text;
+               int             rc;
 
-       len = STRLENOF( "(!(objectClass=" "))" )
-               + dli->dli_oc->soc_cname.bv_len;
-       dli->dli_default_filter.bv_val = SLAP_MALLOC( len + 1 );
-       if ( dli->dli_default_filter.bv_val == NULL ) {
-               fprintf( stderr, "dynlist_db_open(): malloc failed\n" );
-               return -1;
+               if ( dli->dli_oc == NULL ) {
+                       if ( oc == NULL ) {
+                               oc = oc_find( "groupOfURLs" );
+                               if ( oc == NULL ) {
+                                       Debug( LDAP_DEBUG_ANY, "dynlist_db_open: "
+                                               "unable to fetch objectClass \"groupOfURLs\".\n",
+                                               0, 0, 0 );
+                                       return 1;
+                               }
+                       }
+
+                       dli->dli_oc = oc;
+               }
+
+               if ( dli->dli_ad == NULL ) {
+                       if ( ad == NULL ) {
+                               rc = slap_str2ad( "memberURL", &ad, &text );
+                               if ( rc != LDAP_SUCCESS ) {
+                                       Debug( LDAP_DEBUG_ANY, "dynlist_db_open: "
+                                               "unable to fetch attributeDescription \"memberURL\": %d (%s).\n",
+                                               rc, text, 0 );
+                                       return 1;
+                               }
+                       }
+               
+                       dli->dli_ad = ad;                       
+               }
+
+               rc = dynlist_build_def_filter( dli );
+               if ( rc != 0 ) {
+                       return rc;
+               }
        }
-       ptr = lutil_strcopy( dli->dli_default_filter.bv_val, "(!(objectClass=" );
-       ptr = lutil_strcopy( ptr, dli->dli_oc->soc_cname.bv_val );
-       ptr = lutil_strcopy( ptr, "))" );
-       dli->dli_default_filter.bv_len = ptr - dli->dli_default_filter.bv_val;
 
        return 0;
 }
@@ -729,21 +1359,29 @@ dynlist_db_destroy(
        BackendDB       *be )
 {
        slap_overinst   *on = (slap_overinst *) be->bd_info;
-       int             rc = 0;
 
        if ( on->on_bi.bi_private ) {
-               dynlist_info    *dli = (dynlist_info *)on->on_bi.bi_private;
+               dynlist_info_t  *dli = (dynlist_info_t *)on->on_bi.bi_private,
+                               *dli_next;
 
-               dli->dli_oc = NULL;
-               dli->dli_ad = NULL;
+               for ( dli_next = dli; dli_next; dli = dli_next ) {
+                       dli_next = dli->dli_next;
 
-               ch_free( dli );
+                       ch_free( dli->dli_default_filter.bv_val );
+                       ch_free( dli );
+               }
        }
 
-       return rc;
+       return 0;
 }
 
-static slap_overinst dynlist = { { NULL } };
+static slap_overinst   dynlist = { { NULL } };
+#ifdef TAKEOVER_DYNGROUP
+static char            *obsolete_names[] = {
+       "dyngroup",
+       NULL
+};
+#endif
 
 #if SLAPD_OVER_DYNLIST == SLAPD_MOD_DYNAMIC
 static
@@ -751,14 +1389,36 @@ static
 int
 dynlist_initialize(void)
 {
+#ifndef OL_2_2_COMPAT
+       int     rc = 0;
+#endif
+
        dynlist.on_bi.bi_type = "dynlist";
-       dynlist.on_bi.bi_db_init = dynlist_db_init;
+
+#ifdef TAKEOVER_DYNGROUP
+       /* makes dynlist incompatible with dyngroup */
+       dynlist.on_bi.bi_obsolete_names = obsolete_names;
+#endif
+
+#ifdef OL_2_2_COMPAT
        dynlist.on_bi.bi_db_config = dynlist_db_config;
+#else
+       dynlist.on_bi.bi_db_config = config_generic_wrapper;
+#endif
        dynlist.on_bi.bi_db_open = dynlist_db_open;
        dynlist.on_bi.bi_db_destroy = dynlist_db_destroy;
 
        dynlist.on_response = dynlist_response;
 
+#ifndef OL_2_2_COMPAT
+       dynlist.on_bi.bi_cf_ocs = dlocs;
+
+       rc = config_register_schema( dlcfg, dlocs );
+       if ( rc ) {
+               return rc;
+       }
+#endif
+
        return overlay_register( &dynlist );
 }