]> git.sur5r.net Git - openldap/blobdiff - servers/slapd/backend.c
ITS#3534, 3546, 3571 revert abandon behavior
[openldap] / servers / slapd / backend.c
index c71e1df78c8414133d3cb927f8071248786ad3d5..b03acf824f46783ebf079fb529314d326c13ebb7 100644 (file)
@@ -1,9 +1,28 @@
+/* backend.c - routines for dealing with back-end databases */
 /* $OpenLDAP$ */
-/*
- * Copyright 1998-2002 The OpenLDAP Foundation, All Rights Reserved.
- * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2005 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in the file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+/* Portions Copyright (c) 1995 Regents of the University of Michigan.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and that due credit is given
+ * to the University of Michigan at Ann Arbor. The name of the University
+ * may not be used to endorse or promote products derived from this
+ * software without specific prior written permission. This software
+ * is provided ``as is'' without express or implied warranty.
  */
-/* backend.c - routines for dealing with back-end databases */
 
 
 #include "portable.h"
 
 #include <ac/string.h>
 #include <ac/socket.h>
-
 #include <sys/stat.h>
 
 #include "slap.h"
 #include "lutil.h"
 #include "lber_pvt.h"
 
+#include "ldap_rq.h"
+
+#ifdef LDAP_SLAPI
+#include "slapi/slapi.h"
+
+static void init_group_pblock( Operation *op, Entry *target,
+       Entry *e, struct berval *op_ndn, AttributeDescription *group_at );
+static int call_group_preop_plugins( Operation *op );
+static void call_group_postop_plugins( Operation *op );
+#endif /* LDAP_SLAPI */
+
 /*
  * If a module is configured as dynamic, its header should not
  * get included into slapd. While this is a general rule and does
  * imported into slapd without appropriate __declspec(dllimport) directives.
  */
 
-#if defined(SLAPD_BDB) && !defined(SLAPD_BDB_DYNAMIC)
+#if SLAPD_BDB == SLAPD_MOD_STATIC
 #include "back-bdb/external.h"
 #endif
-#if defined(SLAPD_DNSSRV) && !defined(SLAPD_DNSSRV_DYNAMIC)
+#if SLAPD_DNSSRV == SLAPD_MOD_STATIC
 #include "back-dnssrv/external.h"
 #endif
-#if defined(SLAPD_LDAP) && !defined(SLAPD_LDAP_DYNAMIC)
+#if SLAPD_HDB == SLAPD_MOD_STATIC
+#include "back-hdb/external.h"
+#endif
+#if SLAPD_LDAP == SLAPD_MOD_STATIC
 #include "back-ldap/external.h"
 #endif
-#if defined(SLAPD_LDBM) && !defined(SLAPD_LDBM_DYNAMIC)
+#if SLAPD_LDBM == SLAPD_MOD_STATIC
 #include "back-ldbm/external.h"
 #endif
-#if defined(SLAPD_META) && !defined(SLAPD_META_DYNAMIC)
+#if SLAPD_META == SLAPD_MOD_STATIC
 #include "back-meta/external.h"
 #endif
-#if defined(SLAPD_MONITOR) && !defined(SLAPD_MONITOR_DYNAMIC)
+#if SLAPD_MONITOR == SLAPD_MOD_STATIC
 #include "back-monitor/external.h"
 #endif
-#if defined(SLAPD_NULL) && !defined(SLAPD_NULL_DYNAMIC)
+#if SLAPD_NULL == SLAPD_MOD_STATIC
 #include "back-null/external.h"
 #endif
-#if defined(SLAPD_PASSWD) && !defined(SLAPD_PASSWD_DYNAMIC)
+#if SLAPD_PASSWD == SLAPD_MOD_STATIC
 #include "back-passwd/external.h"
 #endif
-#if defined(SLAPD_PERL) && !defined(SLAPD_PERL_DYNAMIC)
+#if SLAPD_PERL == SLAPD_MOD_STATIC
 #include "back-perl/external.h"
 #endif
-#if defined(SLAPD_SHELL) && !defined(SLAPD_SHELL_DYNAMIC)
+#if SLAPD_RELAY == SLAPD_MOD_STATIC
+#include "back-relay/external.h"
+#endif
+#if SLAPD_SHELL == SLAPD_MOD_STATIC
 #include "back-shell/external.h"
 #endif
-#if defined(SLAPD_TCL) && !defined(SLAPD_TCL_DYNAMIC)
+#if SLAPD_TCL == SLAPD_MOD_STATIC
 #include "back-tcl/external.h"
 #endif
-#if defined(SLAPD_SQL) && !defined(SLAPD_SQL_DYNAMIC)
+#if SLAPD_SQL == SLAPD_MOD_STATIC
 #include "back-sql/external.h"
 #endif
-#if defined(SLAPD_PRIVATE) && !defined(SLAPD_PRIVATE_DYNAMIC)
+#if SLAPD_PRIVATE == SLAPD_MOD_STATIC
 #include "private/external.h"
 #endif
 
 static BackendInfo binfo[] = {
-#if defined(SLAPD_BDB) && !defined(SLAPD_BDB_DYNAMIC)
+#if SLAPD_BDB == SLAPD_MOD_STATIC
        {"bdb", bdb_initialize},
 #endif
-#if defined(SLAPD_DNSSRV) && !defined(SLAPD_DNSSRV_DYNAMIC)
+#if SLAPD_DNSSRV == SLAPD_MOD_STATIC
        {"dnssrv",      dnssrv_back_initialize},
 #endif
-#if defined(SLAPD_LDAP) && !defined(SLAPD_LDAP_DYNAMIC)
+#if SLAPD_HDB == SLAPD_MOD_STATIC
+       {"hdb", hdb_initialize},
+#endif
+#if SLAPD_LDAP == SLAPD_MOD_STATIC
        {"ldap",        ldap_back_initialize},
 #endif
-#if defined(SLAPD_LDBM) && !defined(SLAPD_LDBM_DYNAMIC)
+#if SLAPD_LDBM == SLAPD_MOD_STATIC
        {"ldbm",        ldbm_back_initialize},
 #endif
-#if defined(SLAPD_META) && !defined(SLAPD_META_DYNAMIC)
+#if SLAPD_META == SLAPD_MOD_STATIC
        {"meta",        meta_back_initialize},
 #endif
-#if defined(SLAPD_MONITOR) && !defined(SLAPD_MONITOR_DYNAMIC)
+#if SLAPD_MONITOR == SLAPD_MOD_STATIC
        {"monitor",     monitor_back_initialize},
 #endif
-#if defined(SLAPD_NULL) && !defined(SLAPD_NULL_DYNAMIC)
+#if SLAPD_NULL == SLAPD_MOD_STATIC
        {"null",        null_back_initialize},
 #endif
-#if defined(SLAPD_PASSWD) && !defined(SLAPD_PASSWD_DYNAMIC)
+#if SLAPD_PASSWD == SLAPD_MOD_STATIC
        {"passwd",      passwd_back_initialize},
 #endif
-#if defined(SLAPD_PERL) && !defined(SLAPD_PERL_DYNAMIC)
+#if SLAPD_PERL == SLAPD_MOD_STATIC
        {"perl",        perl_back_initialize},
 #endif
-#if defined(SLAPD_SHELL) && !defined(SLAPD_SHELL_DYNAMIC)
+#if SLAPD_RELAY == SLAPD_MOD_STATIC
+       {"relay",       relay_back_initialize},
+#endif
+#if SLAPD_SHELL == SLAPD_MOD_STATIC
        {"shell",       shell_back_initialize},
 #endif
-#if defined(SLAPD_TCL) && !defined(SLAPD_TCL_DYNAMIC)
+#if SLAPD_TCL == SLAPD_MOD_STATIC
        {"tcl",         tcl_back_initialize},
 #endif
-#if defined(SLAPD_SQL) && !defined(SLAPD_SQL_DYNAMIC)
-       {"sql",         sql_back_initialize},
+#if SLAPD_SQL == SLAPD_MOD_STATIC
+       {"sql",         backsql_initialize},
 #endif
        /* for any private backend */
-#if defined(SLAPD_PRIVATE) && !defined(SLAPD_PRIVATE_DYNAMIC)
+#if SLAPD_PRIVATE == SLAPD_MOD_STATIC
        {"private",     private_back_initialize},
 #endif
        {NULL}
@@ -117,10 +158,15 @@ BackendInfo       *backendInfo = NULL;
 int                    nBackendDB = 0; 
 BackendDB      *backendDB = NULL;
 
+ldap_pvt_thread_pool_t syncrepl_pool;
+int                    syncrepl_pool_max = SLAP_MAX_SYNCREPL_THREADS;
+
 int backend_init(void)
 {
        int rc = -1;
 
+       ldap_pvt_thread_pool_init( &syncrepl_pool, syncrepl_pool_max, 0 );
+
        if((nBackendInfo != 0) || (backendInfo != NULL)) {
                /* already initialized */
 #ifdef NEW_LOGGING
@@ -137,6 +183,8 @@ int backend_init(void)
                binfo[nBackendInfo].bi_type != NULL;
                nBackendInfo++ )
        {
+               assert( binfo[nBackendInfo].bi_init );
+
                rc = binfo[nBackendInfo].bi_init( &binfo[nBackendInfo] );
 
                if(rc != 0) {
@@ -186,41 +234,94 @@ int backend_init(void)
 
 int backend_add(BackendInfo *aBackendInfo)
 {
-   int rc = 0;
+       int rc = 0;
+
+       if ( aBackendInfo->bi_init == NULL ) {
+#ifdef NEW_LOGGING
+               LDAP_LOG( BACKEND, ERR, "backend_add: "
+                       "backend type \"%s\" does not have the (mandatory)init function\n",
+                       aBackendInfo->bi_type, 0, 0 );
+#else
+               Debug( LDAP_DEBUG_ANY, "backend_add: "
+                       "backend type \"%s\" does not have the (mandatory)init function\n",
+                       aBackendInfo->bi_type, 0, 0 );
+#endif
+               return -1;
+       }
 
    if ((rc = aBackendInfo->bi_init(aBackendInfo)) != 0) {
 #ifdef NEW_LOGGING
-               LDAP_LOG( BACKEND, ERR, 
-                  "backend_add:  initialization for type \"%s\" failed\n",
-                  aBackendInfo->bi_type, 0, 0 );
+               LDAP_LOG( BACKEND, ERR, 
+                       "backend_add:  initialization for type \"%s\" failed\n",
+                       aBackendInfo->bi_type, 0, 0 );
 #else
-      Debug( LDAP_DEBUG_ANY,
-            "backend_add: initialization for type \"%s\" failed\n",
-            aBackendInfo->bi_type, 0, 0 );
+               Debug( LDAP_DEBUG_ANY,
+                       "backend_add:  initialization for type \"%s\" failed\n",
+                       aBackendInfo->bi_type, 0, 0 );
 #endif
-      return rc;
+               return rc;
    }
 
-   /* now add the backend type to the Backend Info List */
-   {
-      BackendInfo *newBackendInfo = 0;
-
-      /* if backendInfo == binfo no deallocation of old backendInfo */
-      if (backendInfo == binfo) {
-        newBackendInfo = ch_calloc(nBackendInfo + 1, sizeof(BackendInfo));
-        AC_MEMCPY(newBackendInfo, backendInfo, sizeof(BackendInfo) * 
-               nBackendInfo);
-      } else {
-        newBackendInfo = ch_realloc(backendInfo, sizeof(BackendInfo) * 
-                                    (nBackendInfo + 1));
-      }
-      AC_MEMCPY(&newBackendInfo[nBackendInfo], aBackendInfo, 
-            sizeof(BackendInfo));
-      backendInfo = newBackendInfo;
-      nBackendInfo++;
-
-      return 0;
-   }       
+       /* now add the backend type to the Backend Info List */
+       {
+               BackendInfo *newBackendInfo = 0;
+
+               /* if backendInfo == binfo no deallocation of old backendInfo */
+               if (backendInfo == binfo) {
+                       newBackendInfo = ch_calloc(nBackendInfo + 1, sizeof(BackendInfo));
+                       AC_MEMCPY(newBackendInfo, backendInfo,
+                               sizeof(BackendInfo) * nBackendInfo);
+               } else {
+                       newBackendInfo = ch_realloc(backendInfo,
+                               sizeof(BackendInfo) * (nBackendInfo + 1));
+               }
+
+               AC_MEMCPY(&newBackendInfo[nBackendInfo], aBackendInfo,
+                       sizeof(BackendInfo));
+               backendInfo = newBackendInfo;
+               nBackendInfo++;
+               return 0;
+       }
+}
+
+/* startup a specific backend database */
+int backend_startup_one(Backend *be)
+{
+       int rc = 0;
+
+       assert(be);
+
+       be->be_pending_csn_list = (struct be_pcl *)
+               ch_calloc( 1, sizeof( struct be_pcl ));
+       build_new_dn( &be->be_context_csn, be->be_nsuffix,
+               (struct berval *)&slap_ldapsync_cn_bv, NULL );
+
+       LDAP_TAILQ_INIT( be->be_pending_csn_list );
+
+#ifdef NEW_LOGGING
+       LDAP_LOG( BACKEND, DETAIL1, "backend_startup:  starting \"%s\"\n",
+               be->be_suffix ? be->be_suffix[0].bv_val : "(unknown)",
+               0, 0 );
+#else
+       Debug( LDAP_DEBUG_TRACE,
+               "backend_startup: starting \"%s\"\n",
+               be->be_suffix ? be->be_suffix[0].bv_val : "(unknown)",
+               0, 0 );
+#endif
+       if ( be->bd_info->bi_db_open ) {
+               rc = be->bd_info->bi_db_open( be );
+               if ( rc != 0 ) {
+#ifdef NEW_LOGGING
+                       LDAP_LOG( BACKEND, CRIT, 
+                               "backend_startup: bi_db_open failed! (%d)\n", rc, 0, 0 );
+#else
+                       Debug( LDAP_DEBUG_ANY,
+                               "backend_startup: bi_db_open failed! (%d)\n",
+                               rc, 0, 0 );
+#endif
+               }
+       }
+       return rc;
 }
 
 int backend_startup(Backend *be)
@@ -242,21 +343,12 @@ int backend_startup(Backend *be)
        }
 
        if(be != NULL) {
-               /* startup a specific backend database */
-#ifdef NEW_LOGGING
-               LDAP_LOG( BACKEND, DETAIL1, "backend_startup:  starting \"%s\"\n",
-                          be->be_suffix[0].bv_val, 0, 0 );
-#else
-               Debug( LDAP_DEBUG_TRACE,
-                       "backend_startup: starting \"%s\"\n",
-                       be->be_suffix[0].bv_val, 0, 0 );
-#endif
-
                if ( be->bd_info->bi_open ) {
                        rc = be->bd_info->bi_open( be->bd_info );
                        if ( rc != 0 ) {
 #ifdef NEW_LOGGING
-                               LDAP_LOG( BACKEND, CRIT, "backend_startup: bi_open failed!\n", 0, 0, 0 );
+                               LDAP_LOG( BACKEND, CRIT,
+                                       "backend_startup: bi_open failed!\n", 0, 0, 0 );
 #else
                                Debug( LDAP_DEBUG_ANY,
                                        "backend_startup: bi_open failed!\n",
@@ -267,22 +359,7 @@ int backend_startup(Backend *be)
                        }
                }
 
-               if ( be->bd_info->bi_db_open ) {
-                       rc = be->bd_info->bi_db_open( be );
-                       if ( rc != 0 ) {
-#ifdef NEW_LOGGING
-                               LDAP_LOG( BACKEND, CRIT, 
-                                       "backend_startup: bi_db_open failed! (%d)\n", rc, 0, 0 );
-#else
-                               Debug( LDAP_DEBUG_ANY,
-                                       "backend_startup: bi_db_open failed! (%d)\n",
-                                       rc, 0, 0 );
-#endif
-                               return rc;
-                       }
-               }
-
-               return rc;
+               return backend_startup_one( be );
        }
 
        /* open each backend type */
@@ -309,24 +386,57 @@ int backend_startup(Backend *be)
                }
        }
 
+       ldap_pvt_thread_mutex_init( &syncrepl_rq.rq_mutex );
+       LDAP_STAILQ_INIT( &syncrepl_rq.task_list );
+       LDAP_STAILQ_INIT( &syncrepl_rq.run_list );
+
        /* open each backend database */
        for( i = 0; i < nBackendDB; i++ ) {
+               if ( backendDB[i].be_suffix == NULL ) {
+#ifdef NEW_LOGGING
+                       LDAP_LOG( BACKEND, CRIT, 
+                               "backend_startup: warning, database %d (%s) "
+                               "has no suffix\n",
+                               i, backendDB[i].bd_info->bi_type, 0 );
+#else
+                       Debug( LDAP_DEBUG_ANY,
+                               "backend_startup: warning, database %d (%s) "
+                               "has no suffix\n",
+                               i, backendDB[i].bd_info->bi_type, 0 );
+#endif
+               }
                /* append global access controls */
                acl_append( &backendDB[i].be_acl, global_acl );
 
-               if ( backendDB[i].bd_info->bi_db_open ) {
-                       rc = backendDB[i].bd_info->bi_db_open(
-                               &backendDB[i] );
-                       if ( rc != 0 ) {
+               rc = backend_startup_one( &backendDB[i] );
+
+               if ( rc ) return rc;
+
+
+               if ( !LDAP_STAILQ_EMPTY( &backendDB[i].be_syncinfo )) {
+                       syncinfo_t *si;
+
+                       if ( !( backendDB[i].be_search && backendDB[i].be_add &&
+                               backendDB[i].be_modify && backendDB[i].be_delete )) {
 #ifdef NEW_LOGGING
                                LDAP_LOG( BACKEND, CRIT, 
-                                       "backend_startup: bi_db_open(%d) failed! (%d)\n", i, rc, 0 );
+                                       "backend_startup: database(%d) does not support "
+                                       "operations required for syncrepl", i, 0, 0 );
 #else
                                Debug( LDAP_DEBUG_ANY,
-                                       "backend_startup: bi_db_open(%d) failed! (%d)\n",
-                                       i, rc, 0 );
+                                       "backend_startup: database(%d) does not support "
+                                       "operations required for syncrepl", i, 0, 0 );
 #endif
-                               return rc;
+                               continue;
+                       }
+
+                       LDAP_STAILQ_FOREACH( si, &backendDB[i].be_syncinfo, si_next ) {
+                               si->si_be = &backendDB[i];
+                               init_syncrepl( si );
+                               ldap_pvt_thread_mutex_lock( &syncrepl_rq.rq_mutex );
+                               ldap_pvt_runqueue_insert( &syncrepl_rq,
+                                               si->si_interval, do_syncrepl, (void *) si );
+                               ldap_pvt_thread_mutex_unlock( &syncrepl_rq.rq_mutex );
                        }
                }
        }
@@ -410,9 +520,19 @@ int backend_destroy(void)
 {
        int i;
        BackendDB *bd;
+       syncinfo_t *si_entry;
+
+       ldap_pvt_thread_pool_destroy( &syncrepl_pool, 1 );
 
        /* destroy each backend database */
        for( i = 0, bd = backendDB; i < nBackendDB; i++, bd++ ) {
+
+               while ( !LDAP_STAILQ_EMPTY( &bd->be_syncinfo )) {
+                       si_entry = LDAP_STAILQ_FIRST( &bd->be_syncinfo );
+                       LDAP_STAILQ_REMOVE_HEAD( &bd->be_syncinfo, si_next );
+                       syncinfo_free( si_entry );
+               }
+               
                if ( bd->bd_info->bi_db_destroy ) {
                        bd->bd_info->bi_db_destroy( bd );
                }
@@ -421,6 +541,7 @@ int backend_destroy(void)
                if ( bd->be_rootdn.bv_val ) free( bd->be_rootdn.bv_val );
                if ( bd->be_rootndn.bv_val ) free( bd->be_rootndn.bv_val );
                if ( bd->be_rootpw.bv_val ) free( bd->be_rootpw.bv_val );
+               if ( bd->be_context_csn.bv_val ) free( bd->be_context_csn.bv_val );
                acl_destroy( bd->be_acl, global_acl );
        }
        free( backendDB );
@@ -462,8 +583,7 @@ BackendInfo* backend_info(const char *type)
 
 BackendDB *
 backend_db_init(
-    const char *type
-)
+    const char *type )
 {
        Backend *be;
        BackendInfo *bi = backend_info(type);
@@ -474,12 +594,22 @@ backend_db_init(
                return NULL;
        }
 
+       be = backendDB;
+
        backendDB = (BackendDB *) ch_realloc(
                        (char *) backendDB,
                    (nBackendDB + 1) * sizeof(Backend) );
 
        memset( &backendDB[nbackends], '\0', sizeof(Backend) );
 
+       /* did realloc move our table? if so, fix up dependent pointers */
+       if ( be != backendDB ) {
+               int i;
+               for ( i=0, be=backendDB; i<nbackends; i++, be++ ) {
+                       be->be_pcl_mutexp = &be->be_pcl_mutex;
+               }
+       }
+
        be = &backends[nbackends++];
 
        be->bd_info = bi;
@@ -490,6 +620,13 @@ backend_db_init(
        be->be_requires = global_requires;
        be->be_ssf_set = global_ssf_set;
 
+       be->be_context_csn.bv_len = 0;
+       be->be_context_csn.bv_val = NULL;
+       be->be_pcl_mutexp = &be->be_pcl_mutex;
+       ldap_pvt_thread_mutex_init( be->be_pcl_mutexp );
+
+       LDAP_STAILQ_INIT( &be->be_syncinfo );
+
        /* assign a default depth limit for alias deref */
        be->be_max_deref_depth = SLAPD_DEFAULT_MAXDEREFDEPTH; 
 
@@ -533,7 +670,7 @@ select_backend(
                for ( j = 0; backends[i].be_nsuffix != NULL &&
                    backends[i].be_nsuffix[j].bv_val != NULL; j++ )
                {
-                       if (( backends[i].be_flags & SLAP_BFLAG_GLUE_SUBORDINATE )
+                       if ( ( SLAP_GLUE_SUBORDINATE( &backends[i] ) )
                                && noSubs )
                        {
                                continue;
@@ -562,7 +699,8 @@ select_backend(
                                if( be == NULL ) {
                                        be = &backends[i];
 
-                                       if( manageDSAit && len == dnlen ) {
+                                       if( manageDSAit && len == dnlen &&
+                                               !SLAP_GLUE_SUBORDINATE( be ) ) {
                                                continue;
                                        }
                                } else {
@@ -578,13 +716,15 @@ select_backend(
 
 int
 be_issuffix(
-    Backend    *be,
-    struct berval      *bvsuffix
-)
+    Backend *be,
+    struct berval *bvsuffix )
 {
        int     i;
 
-       for ( i = 0; be->be_nsuffix != NULL && be->be_nsuffix[i].bv_val != NULL; i++ ) {
+       for ( i = 0;
+               be->be_nsuffix != NULL && be->be_nsuffix[i].bv_val != NULL;
+               i++ )
+       {
                if ( bvmatch( &be->be_nsuffix[i], bvsuffix ) ) {
                        return( 1 );
                }
@@ -594,7 +734,7 @@ be_issuffix(
 }
 
 int
-be_isroot( Backend *be, struct berval *ndn )
+be_isroot_dn( Backend *be, struct berval *ndn )
 {
        if ( !ndn->bv_len ) {
                return( 0 );
@@ -608,15 +748,31 @@ be_isroot( Backend *be, struct berval *ndn )
 }
 
 int
-be_isupdate( Backend *be, struct berval *ndn )
+be_sync_update( Operation *op )
 {
-       if ( !ndn->bv_len ) {
-               return( 0 );
-       }
+       return ( SLAP_SYNC_SHADOW( op->o_bd ) && syncrepl_isupdate( op ) );
+}
 
-       if ( !be->be_update_ndn.bv_len ) {
-               return( 0 );
-       }
+int
+be_slurp_update( Operation *op )
+{
+       return ( SLAP_SLURP_SHADOW( op->o_bd ) &&
+               be_isupdate_dn( op->o_bd, &op->o_ndn ));
+}
+
+int
+be_shadow_update( Operation *op )
+{
+       return ( SLAP_SHADOW( op->o_bd ) &&
+               ( syncrepl_isupdate( op ) || be_isupdate_dn( op->o_bd, &op->o_ndn )));
+}
+
+int
+be_isupdate_dn( Backend *be, struct berval *ndn )
+{
+       if ( !ndn->bv_len ) return( 0 );
+
+       if ( !be->be_update_ndn.bv_len ) return( 0 );
 
        return dn_match( &be->be_update_ndn, ndn );
 }
@@ -628,29 +784,33 @@ be_root_dn( Backend *be )
 }
 
 int
-be_isroot_pw( Backend *be,
-       Connection *conn,
-       struct berval *ndn,
-       struct berval *cred )
+be_isroot( Operation *op )
+{
+       return be_isroot_dn( op->o_bd, &op->o_ndn );
+}
+
+int
+be_isroot_pw( Operation *op )
 {
        int result;
+       char *errmsg;
 
-       if ( ! be_isroot( be, ndn ) ) {
+       if ( ! be_isroot_dn( op->o_bd, &op->o_req_ndn ) ) {
                return 0;
        }
 
-       if( be->be_rootpw.bv_len == 0 ) {
+       if( op->o_bd->be_rootpw.bv_len == 0 ) {
                return 0;
        }
 
 #if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
        ldap_pvt_thread_mutex_lock( &passwd_mutex );
 #ifdef SLAPD_SPASSWD
-       lutil_passwd_sasl_conn = conn->c_sasl_context;
+       lutil_passwd_sasl_conn = op->o_conn->c_sasl_authctx;
 #endif
 #endif
 
-       result = lutil_passwd( &be->be_rootpw, cred, NULL );
+       result = lutil_passwd( &op->o_bd->be_rootpw, &op->orb_cred, NULL, NULL );
 
 #if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
 #ifdef SLAPD_SPASSWD
@@ -664,15 +824,13 @@ be_isroot_pw( Backend *be,
 
 int
 be_entry_release_rw(
-       BackendDB *be,
-       Connection *conn,
        Operation *op,
        Entry *e,
        int rw )
 {
-       if ( be->be_release ) {
+       if ( op->o_bd->be_release ) {
                /* free and release entry from backend */
-               return be->be_release( be, conn, op, e, rw );
+               return op->o_bd->be_release( op, e, rw );
        } else {
                /* free entry */
                entry_free( e );
@@ -681,17 +839,57 @@ be_entry_release_rw(
 }
 
 int
-backend_unbind(
-       Connection   *conn,
-       Operation    *op
-)
+backend_unbind( Operation *op, SlapReply *rs )
 {
-       int     i;
+       int             i;
 
        for ( i = 0; i < nbackends; i++ ) {
+#if defined( LDAP_SLAPI )
+               if ( op->o_pb ) {
+                       int rc;
+                       if ( i == 0 ) slapi_int_pblock_set_operation( op->o_pb, op );
+                       slapi_pblock_set( op->o_pb, SLAPI_BACKEND, (void *)&backends[i] );
+                       rc = slapi_int_call_plugins( &backends[i],
+                               SLAPI_PLUGIN_PRE_UNBIND_FN, (Slapi_PBlock *)op->o_pb );
+                       if ( rc < 0 ) {
+                               /*
+                                * A preoperation plugin failure will abort the
+                                * entire operation.
+                                */
+#ifdef NEW_LOGGING
+                               LDAP_LOG( OPERATION, INFO,
+                                       "do_bind: Unbind preoperation plugin failed\n",
+                                       0, 0, 0);
+#else
+                               Debug(LDAP_DEBUG_TRACE,
+                                       "do_bind: Unbind preoperation plugin failed\n",
+                                       0, 0, 0);
+#endif
+                               return 0;
+                       }
+               }
+#endif /* defined( LDAP_SLAPI ) */
+
                if ( backends[i].be_unbind ) {
-                       (*backends[i].be_unbind)( &backends[i], conn, op );
+                       op->o_bd = &backends[i];
+                       (*backends[i].be_unbind)( op, rs );
                }
+
+#if defined( LDAP_SLAPI )
+               if ( op->o_pb != NULL && slapi_int_call_plugins( &backends[i],
+                       SLAPI_PLUGIN_POST_UNBIND_FN, (Slapi_PBlock *)op->o_pb ) < 0 )
+               {
+#ifdef NEW_LOGGING
+                       LDAP_LOG( OPERATION, INFO,
+                               "do_unbind: Unbind postoperation plugins failed\n",
+                               0, 0, 0);
+#else
+                       Debug(LDAP_DEBUG_TRACE,
+                               "do_unbind: Unbind postoperation plugins failed\n",
+                               0, 0, 0);
+#endif
+               }
+#endif /* defined( LDAP_SLAPI ) */
        }
 
        return 0;
@@ -699,8 +897,7 @@ backend_unbind(
 
 int
 backend_connection_init(
-       Connection   *conn
-)
+       Connection   *conn )
 {
        int     i;
 
@@ -715,8 +912,7 @@ backend_connection_init(
 
 int
 backend_connection_destroy(
-       Connection   *conn
-)
+       Connection   *conn )
 {
        int     i;
 
@@ -731,36 +927,33 @@ backend_connection_destroy(
 
 static int
 backend_check_controls(
-       Backend *be,
-       Connection *conn,
        Operation *op,
-       const char **text )
+       SlapReply *rs )
 {
        LDAPControl **ctrls = op->o_ctrls;
+       rs->sr_err = LDAP_SUCCESS;
 
-       if( ctrls == NULL ) return LDAP_SUCCESS;
-
-       for( ; *ctrls != NULL ; ctrls++ ) {
-               if( (*ctrls)->ldctl_iscritical &&
-                       !ldap_charray_inlist( be->be_controls, (*ctrls)->ldctl_oid ) )
-               {
-                       *text = "control unavailable in context";
-                       return LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
+       if( ctrls ) {
+               for( ; *ctrls != NULL ; ctrls++ ) {
+                       if( (*ctrls)->ldctl_iscritical && !ldap_charray_inlist(
+                               op->o_bd->be_controls, (*ctrls)->ldctl_oid ) )
+                       {
+                               rs->sr_text = "control unavailable in context";
+                               rs->sr_err = LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
+                               break;
+                       }
                }
        }
 
-       return LDAP_SUCCESS;
+       return rs->sr_err;
 }
 
 int
 backend_check_restrictions(
-       Backend *be,
-       Connection *conn,
        Operation *op,
-       struct berval *opdata,
-       const char **text )
+       SlapReply *rs,
+       struct berval *opdata )
 {
-       int rc;
        slap_mask_t restrictops;
        slap_mask_t requires;
        slap_mask_t opflag;
@@ -769,16 +962,14 @@ backend_check_restrictions(
        int starttls = 0;
        int session = 0;
 
-       if( be ) {
-               rc = backend_check_controls( be, conn, op, text );
-
-               if( rc != LDAP_SUCCESS ) {
-                       return rc;
+       if( op->o_bd ) {
+               if ( backend_check_controls( op, rs ) != LDAP_SUCCESS ) {
+                       return rs->sr_err;
                }
 
-               restrictops = be->be_restrictops;
-               requires = be->be_requires;
-               ssf = &be->be_ssf_set;
+               restrictops = op->o_bd->be_restrictops;
+               requires = op->o_bd->be_requires;
+               ssf = &op->o_bd->be_ssf_set;
 
        } else {
                restrictops = global_restrictops;
@@ -812,20 +1003,18 @@ backend_check_restrictions(
                        break;
                }
 
-               {
-                       struct berval bv = BER_BVC( LDAP_EXOP_START_TLS );
-                       if( bvmatch( opdata, &bv ) ) {
-                               session++;
-                               starttls++;
-                               break;
-                       }
+               if( bvmatch( opdata, &slap_EXOP_START_TLS ) ) {
+                       session++;
+                       starttls++;
+                       break;
                }
 
-               {
-                       struct berval bv = BER_BVC( LDAP_EXOP_X_WHO_AM_I );
-                       if( bvmatch( opdata, &bv ) ) {
-                               break;
-                       }
+               if( bvmatch( opdata, &slap_EXOP_WHOAMI ) ) {
+                       break;
+               }
+
+               if ( bvmatch( opdata, &slap_EXOP_CANCEL ) ) {
+                       break;
                }
 
                /* treat everything else as a modify */
@@ -849,29 +1038,37 @@ backend_check_restrictions(
                opflag = 0;
                break;
        default:
-               *text = "restrict operations internal error";
-               return LDAP_OTHER;
+               rs->sr_text = "restrict operations internal error";
+               rs->sr_err = LDAP_OTHER;
+               return rs->sr_err;
        }
 
        if ( !starttls ) {
                /* these checks don't apply to StartTLS */
 
+               rs->sr_err = LDAP_CONFIDENTIALITY_REQUIRED;
                if( op->o_transport_ssf < ssf->sss_transport ) {
-                       *text = "transport confidentiality required";
-                       return LDAP_CONFIDENTIALITY_REQUIRED;
+                       rs->sr_text = op->o_transport_ssf
+                               ? "stronger transport confidentiality required"
+                               : "transport confidentiality required";
+                       return rs->sr_err;
                }
 
                if( op->o_tls_ssf < ssf->sss_tls ) {
-                       *text = "TLS confidentiality required";
-                       return LDAP_CONFIDENTIALITY_REQUIRED;
+                       rs->sr_text = op->o_tls_ssf
+                               ? "stronger TLS confidentiality required"
+                               : "TLS confidentiality required";
+                       return rs->sr_err;
                }
 
 
                if( op->o_tag == LDAP_REQ_BIND && opdata == NULL ) {
                        /* simple bind specific check */
                        if( op->o_ssf < ssf->sss_simple_bind ) {
-                               *text = "confidentiality required";
-                               return LDAP_CONFIDENTIALITY_REQUIRED;
+                               rs->sr_text = op->o_ssf
+                                       ? "stronger confidentiality required"
+                                       : "confidentiality required";
+                               return rs->sr_err;
                        }
                }
 
@@ -879,47 +1076,63 @@ backend_check_restrictions(
                        /* these checks don't apply to SASL bind */
 
                        if( op->o_sasl_ssf < ssf->sss_sasl ) {
-                               *text = "SASL confidentiality required";
-                               return LDAP_CONFIDENTIALITY_REQUIRED;
+                               rs->sr_text = op->o_sasl_ssf
+                                       ? "stronger SASL confidentiality required"
+                                       : "SASL confidentiality required";
+                               return rs->sr_err;
                        }
 
                        if( op->o_ssf < ssf->sss_ssf ) {
-                               *text = "confidentiality required";
-                               return LDAP_CONFIDENTIALITY_REQUIRED;
+                               rs->sr_text = op->o_ssf
+                                       ? "stronger confidentiality required"
+                                       : "confidentiality required";
+                               return rs->sr_err;
                        }
                }
 
                if( updateop ) {
                        if( op->o_transport_ssf < ssf->sss_update_transport ) {
-                               *text = "transport update confidentiality required";
-                               return LDAP_CONFIDENTIALITY_REQUIRED;
+                               rs->sr_text = op->o_transport_ssf
+                                       ? "stronger transport confidentiality required for update"
+                                       : "transport confidentiality required for update";
+                               return rs->sr_err;
                        }
 
                        if( op->o_tls_ssf < ssf->sss_update_tls ) {
-                               *text = "TLS update confidentiality required";
-                               return LDAP_CONFIDENTIALITY_REQUIRED;
+                               rs->sr_text = op->o_tls_ssf
+                                       ? "stronger TLS confidentiality required for update"
+                                       : "TLS confidentiality required for update";
+                               return rs->sr_err;
                        }
 
                        if( op->o_sasl_ssf < ssf->sss_update_sasl ) {
-                               *text = "SASL update confidentiality required";
-                               return LDAP_CONFIDENTIALITY_REQUIRED;
+                               rs->sr_text = op->o_sasl_ssf
+                                       ? "stronger SASL confidentiality required for update"
+                                       : "SASL confidentiality required for update";
+                               return rs->sr_err;
                        }
 
                        if( op->o_ssf < ssf->sss_update_ssf ) {
-                               *text = "update confidentiality required";
-                               return LDAP_CONFIDENTIALITY_REQUIRED;
+                               rs->sr_text = op->o_ssf
+                                       ? "stronger confidentiality required for update"
+                                       : "confidentiality required for update";
+                               return rs->sr_err;
                        }
 
-                       if( op->o_ndn.bv_len == 0 ) {
-                               *text = "modifications require authentication";
-                               return LDAP_STRONG_AUTH_REQUIRED;
+                       if( !( global_allows & SLAP_ALLOW_UPDATE_ANON ) &&
+                               op->o_ndn.bv_len == 0 )
+                       {
+                               rs->sr_text = "modifications require authentication";
+                               rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
+                               return rs->sr_err;
                        }
 
 #ifdef SLAP_X_LISTENER_MOD
-                       if ( ! ( conn->c_listener->sl_perms & S_IWUSR ) ) {
+                       if ( op->o_conn->c_listener && ! ( op->o_conn->c_listener->sl_perms & ( op->o_ndn.bv_len > 0 ? S_IWUSR : S_IWOTH ) ) ) {
                                /* no "w" mode means readonly */
-                               *text = "modifications not allowed on this listener";
-                               return LDAP_UNWILLING_TO_PERFORM;
+                               rs->sr_text = "modifications not allowed on this listener";
+                               rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
+                               return rs->sr_err;
                        }
 #endif /* SLAP_X_LISTENER_MOD */
                }
@@ -931,62 +1144,75 @@ backend_check_restrictions(
                if( requires & SLAP_REQUIRE_STRONG ) {
                        /* should check mechanism */
                        if( ( op->o_transport_ssf < ssf->sss_transport
-                               && op->o_authmech.bv_len == 0 ) || op->o_dn.bv_len == 0 )
+                               && op->o_authtype == LDAP_AUTH_SIMPLE )
+                               || op->o_dn.bv_len == 0 )
                        {
-                               *text = "strong authentication required";
-                               return LDAP_STRONG_AUTH_REQUIRED;
+                               rs->sr_text = "strong(er) authentication required";
+                               rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
+                               return rs->sr_err;
                        }
                }
 
                if( requires & SLAP_REQUIRE_SASL ) {
-                       if( op->o_authmech.bv_len == 0 || op->o_dn.bv_len == 0 ) {
-                               *text = "SASL authentication required";
-                               return LDAP_STRONG_AUTH_REQUIRED;
+                       if( op->o_authtype != LDAP_AUTH_SASL || op->o_dn.bv_len == 0 ) {
+                               rs->sr_text = "SASL authentication required";
+                               rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
+                               return rs->sr_err;
                        }
                }
                        
                if( requires & SLAP_REQUIRE_AUTHC ) {
                        if( op->o_dn.bv_len == 0 ) {
-                               *text = "authentication required";
-                               return LDAP_UNWILLING_TO_PERFORM;
+                               rs->sr_text = "authentication required";
+                               rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
+                               return rs->sr_err;
                        }
                }
 
                if( requires & SLAP_REQUIRE_BIND ) {
                        int version;
-                       ldap_pvt_thread_mutex_lock( &conn->c_mutex );
-                       version = conn->c_protocol;
-                       ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
+                       ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
+                       version = op->o_conn->c_protocol;
+                       ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
 
                        if( !version ) {
                                /* no bind has occurred */
-                               *text = "BIND required";
-                               return LDAP_OPERATIONS_ERROR;
+                               rs->sr_text = "BIND required";
+                               rs->sr_err = LDAP_OPERATIONS_ERROR;
+                               return rs->sr_err;
                        }
                }
 
                if( requires & SLAP_REQUIRE_LDAP_V3 ) {
                        if( op->o_protocol < LDAP_VERSION3 ) {
                                /* no bind has occurred */
-                               *text = "operation restricted to LDAPv3 clients";
-                               return LDAP_OPERATIONS_ERROR;
+                               rs->sr_text = "operation restricted to LDAPv3 clients";
+                               rs->sr_err = LDAP_OPERATIONS_ERROR;
+                               return rs->sr_err;
                        }
                }
 
 #ifdef SLAP_X_LISTENER_MOD
                if ( !starttls && op->o_dn.bv_len == 0 ) {
-                       if ( ! ( conn->c_listener->sl_perms & S_IXUSR ) ) {
+                       if ( op->o_conn->c_listener &&
+                               !( op->o_conn->c_listener->sl_perms & S_IXOTH ))
+               {
                                /* no "x" mode means bind required */
-                               *text = "bind required on this listener";
-                               return LDAP_CONFIDENTIALITY_REQUIRED;
+                               rs->sr_text = "bind required on this listener";
+                               rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
+                               return rs->sr_err;
                        }
                }
 
                if ( !starttls && !updateop ) {
-                       if ( ! ( conn->c_listener->sl_perms & S_IRUSR ) ) {
+                       if ( op->o_conn->c_listener &&
+                               !( op->o_conn->c_listener->sl_perms &
+                                       ( op->o_dn.bv_len > 0 ? S_IRUSR : S_IROTH )))
+                       {
                                /* no "r" mode means no read */
-                               *text = "read not allowed on this listener";
-                               return LDAP_UNWILLING_TO_PERFORM;
+                               rs->sr_text = "read not allowed on this listener";
+                               rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
+                               return rs->sr_err;
                        }
                }
 #endif /* SLAP_X_LISTENER_MOD */
@@ -995,142 +1221,374 @@ backend_check_restrictions(
 
        if( restrictops & opflag ) {
                if( restrictops == SLAP_RESTRICT_OP_READS ) {
-                       *text = "read operations restricted";
+                       rs->sr_text = "read operations restricted";
                } else {
-                       *text = "operation restricted";
+                       rs->sr_text = "operation restricted";
                }
-               return LDAP_UNWILLING_TO_PERFORM;
+               rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
+               return rs->sr_err;
        }
 
-       return LDAP_SUCCESS;
+       rs->sr_err = LDAP_SUCCESS;
+       return rs->sr_err;
 }
 
-int backend_check_referrals(
-       Backend *be,
-       Connection *conn,
-       Operation *op,
-       struct berval *dn,
-       struct berval *ndn )
+int backend_check_referrals( Operation *op, SlapReply *rs )
 {
-       int rc = LDAP_SUCCESS;
-
-       if( be->be_chk_referrals ) {
-               const char *text;
+       rs->sr_err = LDAP_SUCCESS;
 
-               rc = be->be_chk_referrals( be,
-                       conn, op, dn, ndn, &text );
+       if( op->o_bd->be_chk_referrals ) {
+               rs->sr_err = op->o_bd->be_chk_referrals( op, rs );
 
-               if( rc != LDAP_SUCCESS && rc != LDAP_REFERRAL ) {
-                       send_ldap_result( conn, op, rc,
-                               NULL, text, NULL, NULL );
+               if( rs->sr_err != LDAP_SUCCESS && rs->sr_err != LDAP_REFERRAL ) {
+                       send_ldap_result( op, rs );
                }
        }
 
+       return rs->sr_err;
+}
+
+int
+be_entry_get_rw(
+       Operation *op,
+       struct berval *ndn,
+       ObjectClass *oc,
+       AttributeDescription *at,
+       int rw,
+       Entry **e )
+{
+       int rc;
+
+       *e = NULL;
+
+       if (op->o_bd == NULL) {
+               rc = LDAP_NO_SUCH_OBJECT;
+       } else if ( op->o_bd->be_fetch ) {
+               rc = ( op->o_bd->be_fetch )( op, ndn,
+                       oc, at, rw, e );
+       } else {
+               rc = LDAP_UNWILLING_TO_PERFORM;
+       }
        return rc;
 }
 
 int 
 backend_group(
-       Backend *be,
-       Connection *conn,
        Operation *op,
        Entry   *target,
        struct berval *gr_ndn,
        struct berval *op_ndn,
        ObjectClass *group_oc,
-       AttributeDescription *group_at
-)
+       AttributeDescription *group_at )
 {
+       Entry *e;
+       Attribute *a;
+       int rc;
        GroupAssertion *g;
+       Backend *be = op->o_bd;
 
        if ( op->o_abandon ) return SLAPD_ABANDON;
 
-       if ( !dn_match( &target->e_nname, gr_ndn ) ) {
-               /* we won't attempt to send it to a different backend */
-               
-               be = select_backend( gr_ndn, 0, 0 );
-
-               if (be == NULL) {
-                       return LDAP_NO_SUCH_OBJECT;
-               }
-       } 
-
-       ldap_pvt_thread_mutex_lock( &conn->c_mutex );
+       op->o_bd = select_backend( gr_ndn, 0, 0 );
 
-       for (g = conn->c_groups; g; g=g->ga_next) {
-               if (g->ga_be != be || g->ga_oc != group_oc ||
+       for (g = op->o_groups; g; g=g->ga_next) {
+               if (g->ga_be != op->o_bd || g->ga_oc != group_oc ||
                        g->ga_at != group_at || g->ga_len != gr_ndn->bv_len)
                        continue;
                if (strcmp( g->ga_ndn, gr_ndn->bv_val ) == 0)
                        break;
        }
 
-       ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
-
        if (g) {
-               return g->ga_res;
+               rc = g->ga_res;
+               goto done;
        }
 
-       if( be->be_group ) {
-               int res = be->be_group( be, conn, op,
-                       target, gr_ndn, op_ndn,
-                       group_oc, group_at );
-               
-               if ( op->o_tag != LDAP_REQ_BIND && !op->o_do_not_cache ) {
-                       g = ch_malloc(sizeof(GroupAssertion) + gr_ndn->bv_len);
-                       g->ga_be = be;
-                       g->ga_oc = group_oc;
-                       g->ga_at = group_at;
-                       g->ga_res = res;
-                       g->ga_len = gr_ndn->bv_len;
-                       strcpy(g->ga_ndn, gr_ndn->bv_val);
-                       ldap_pvt_thread_mutex_lock( &conn->c_mutex );
-                       g->ga_next = conn->c_groups;
-                       conn->c_groups = g;
-                       ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
+       if ( target && dn_match( &target->e_nname, gr_ndn ) ) {
+               e = target;
+               rc = 0;
+       } else {
+               rc = be_entry_get_rw(op, gr_ndn, group_oc, group_at, 0, &e );
+       }
+       if ( e ) {
+#ifdef LDAP_SLAPI
+               if ( op->o_pb != NULL ) {
+                       init_group_pblock( op, target, e, op_ndn, group_at );
+
+                       rc = call_group_preop_plugins( op );
+                       if ( rc == LDAP_SUCCESS ) {
+                               goto done;
+                       }
                }
+#endif /* LDAP_SLAPI */
 
-               return res;
+               a = attr_find( e->e_attrs, group_at );
+               if ( a ) {
+                       /* If the attribute is a subtype of labeledURI, treat this as
+                        * a dynamic group ala groupOfURLs
+                        */
+                       if (is_at_subtype( group_at->ad_type,
+                               slap_schema.si_ad_labeledURI->ad_type ) )
+                       {
+                               int i;
+                               LDAPURLDesc *ludp;
+                               struct berval bv, nbase;
+                               Filter *filter;
+                               Entry *user;
+                               Backend *b2 = op->o_bd;
+
+                               if ( target && dn_match( &target->e_nname, op_ndn ) ) {
+                                       user = target;
+                               } else {
+                                       op->o_bd = select_backend( op_ndn, 0, 0 );
+                                       rc = be_entry_get_rw(op, op_ndn, NULL, NULL, 0, &user );
+                               }
+                               
+                               if ( rc == 0 ) {
+                                       rc = 1;
+                                       for (i=0; a->a_vals[i].bv_val; i++) {
+                                               if ( ldap_url_parse( a->a_vals[i].bv_val, &ludp ) !=
+                                                       LDAP_SUCCESS )
+                                               {
+                                                       continue;
+                                               }
+                                               nbase.bv_val = NULL;
+                                               /* host part must be empty */
+                                               /* attrs and extensions parts must be empty */
+                                               if (( ludp->lud_host && *ludp->lud_host ) ||
+                                                       ludp->lud_attrs || ludp->lud_exts )
+                                               {
+                                                       goto loopit;
+                                               }
+                                               ber_str2bv( ludp->lud_dn, 0, 0, &bv );
+                                               if ( dnNormalize( 0, NULL, NULL, &bv, &nbase,
+                                                       op->o_tmpmemctx ) != LDAP_SUCCESS )
+                                               {
+                                                       goto loopit;
+                                               }
+                                               switch(ludp->lud_scope) {
+                                               case LDAP_SCOPE_BASE:
+                                                       if ( !dn_match( &nbase, op_ndn )) goto loopit;
+                                                       break;
+                                               case LDAP_SCOPE_ONELEVEL:
+                                                       dnParent(op_ndn, &bv );
+                                                       if ( !dn_match( &nbase, &bv )) goto loopit;
+                                                       break;
+                                               case LDAP_SCOPE_SUBTREE:
+                                                       if ( !dnIsSuffix( op_ndn, &nbase )) goto loopit;
+                                                       break;
+#ifdef LDAP_SCOPE_SUBORDINATE
+                                               case LDAP_SCOPE_SUBORDINATE:
+                                                       if ( dn_match( &nbase, op_ndn ) &&
+                                                               !dnIsSuffix(op_ndn, &nbase ))
+                                                       {
+                                                               goto loopit;
+                                                       }
+#endif
+                                               }
+                                               filter = str2filter_x( op, ludp->lud_filter );
+                                               if ( filter ) {
+                                                       if ( test_filter( NULL, user, filter ) ==
+                                                               LDAP_COMPARE_TRUE )
+                                                       {
+                                                               rc = 0;
+                                                       }
+                                                       filter_free_x( op, filter );
+                                               }
+loopit:
+                                               ldap_free_urldesc( ludp );
+                                               if ( nbase.bv_val ) {
+                                                       op->o_tmpfree( nbase.bv_val, op->o_tmpmemctx );
+                                               }
+                                               if ( rc == 0 ) break;
+                                       }
+                                       if ( user != target ) {
+                                               be_entry_release_r( op, user );
+                                       }
+                               }
+                               op->o_bd = b2;
+                       } else {
+                               rc = value_find_ex( group_at,
+                               SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
+                               SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
+                               a->a_nvals, op_ndn, op->o_tmpmemctx );
+                       }
+               } else {
+                       rc = LDAP_NO_SUCH_ATTRIBUTE;
+               }
+               if (e != target ) {
+                       be_entry_release_r( op, e );
+               }
+       } else {
+               rc = LDAP_NO_SUCH_OBJECT;
+       }
+
+#ifdef LDAP_SLAPI
+       if ( op->o_pb ) call_group_postop_plugins( op );
+#endif /* LDAP_SLAPI */
+
+       if ( op->o_tag != LDAP_REQ_BIND && !op->o_do_not_cache ) {
+               g = op->o_tmpalloc(sizeof(GroupAssertion) + gr_ndn->bv_len,
+                       op->o_tmpmemctx);
+               g->ga_be = op->o_bd;
+               g->ga_oc = group_oc;
+               g->ga_at = group_at;
+               g->ga_res = rc;
+               g->ga_len = gr_ndn->bv_len;
+               strcpy(g->ga_ndn, gr_ndn->bv_val);
+               g->ga_next = op->o_groups;
+               op->o_groups = g;
+       }
+done:
+       op->o_bd = be;
+       return rc;
+}
+
+#ifdef LDAP_SLAPI
+static int backend_compute_output_attr(computed_attr_context *c, Slapi_Attr *a, Slapi_Entry *e)
+{
+       BerVarray v;
+       int rc;
+       BerVarray *vals = (BerVarray *)c->cac_private;
+       Operation *op = NULL;
+       int i, j;
+
+       slapi_pblock_get( c->cac_pb, SLAPI_OPERATION, &op );
+       if ( op == NULL ) {
+               return 1;
+       }
+
+       if ( op->o_conn && access_allowed( op,
+               e, a->a_desc, NULL, ACL_AUTH,
+               &c->cac_acl_state ) == 0 ) {
+               return 1;
+       }
+
+       for ( i=0; a->a_vals[i].bv_val; i++ ) ;
+                       
+       v = op->o_tmpalloc( sizeof(struct berval) * (i+1),
+               op->o_tmpmemctx );
+       for ( i=0,j=0; a->a_vals[i].bv_val; i++ ) {
+               if ( op->o_conn && access_allowed( op,
+                       e, a->a_desc,
+                       &a->a_nvals[i],
+                       ACL_AUTH, &c->cac_acl_state ) == 0 ) {
+                       continue;
+               }
+               ber_dupbv_x( &v[j],
+                       &a->a_nvals[i], op->o_tmpmemctx );
+               if (v[j].bv_val ) j++;
        }
 
-       return LDAP_UNWILLING_TO_PERFORM;
+       if (j == 0) {
+               op->o_tmpfree( v, op->o_tmpmemctx );
+               *vals = NULL;
+               rc = 1;
+       } else {
+               v[j].bv_val = NULL;
+               v[j].bv_len = 0;
+               *vals = v;
+               rc = 0;
+       }
+
+       return rc;
 }
+#endif /* LDAP_SLAPI */
 
 int 
 backend_attribute(
-       Backend *be,
-       Connection *conn,
        Operation *op,
        Entry   *target,
        struct berval   *edn,
        AttributeDescription *entry_at,
-       BerVarray *vals
-)
+       BerVarray *vals,
+       slap_access_t access )
 {
-       if ( target == NULL || !dn_match( &target->e_nname, edn ) ) {
-               /* we won't attempt to send it to a different backend */
-               
-               be = select_backend( edn, 0, 0 );
+       Entry *e;
+       Attribute *a;
+       int i, j, rc = LDAP_SUCCESS;
+       AccessControlState acl_state = ACL_STATE_INIT;
+       Backend *be = op->o_bd;
 
-               if (be == NULL) {
-                       return LDAP_NO_SUCH_OBJECT;
-               }
+       op->o_bd = select_backend( edn, 0, 0 );
+
+       if ( target && dn_match( &target->e_nname, edn ) ) {
+               e = target;
+       } else {
+               rc = be_entry_get_rw(op, edn, NULL, entry_at, 0, &e );
        } 
 
-       if( be->be_attribute ) {
-               return be->be_attribute( be, conn, op, target, edn,
-                       entry_at, vals );
+       if ( e ) {
+               a = attr_find( e->e_attrs, entry_at );
+               if ( a ) {
+                       BerVarray v;
+
+                       if ( op->o_conn && access > ACL_NONE && access_allowed( op,
+                               e, entry_at, NULL, access,
+                               &acl_state ) == 0 ) {
+                               rc = LDAP_INSUFFICIENT_ACCESS;
+                               goto freeit;
+                       }
+
+                       for ( i=0; a->a_vals[i].bv_val; i++ ) ;
+                       
+                       v = op->o_tmpalloc( sizeof(struct berval) * (i+1),
+                               op->o_tmpmemctx );
+                       for ( i=0,j=0; a->a_vals[i].bv_val; i++ ) {
+                               if ( op->o_conn && access > ACL_NONE && access_allowed( op,
+                                       e, entry_at,
+                                       &a->a_nvals[i],
+                                       access, &acl_state ) == 0 ) {
+                                       continue;
+                               }
+                               ber_dupbv_x( &v[j],
+                                       &a->a_nvals[i], op->o_tmpmemctx );
+                               if (v[j].bv_val ) j++;
+                       }
+                       if (j == 0) {
+                               op->o_tmpfree( v, op->o_tmpmemctx );
+                               *vals = NULL;
+                               rc = LDAP_INSUFFICIENT_ACCESS;
+                       } else {
+                               v[j].bv_val = NULL;
+                               v[j].bv_len = 0;
+                               *vals = v;
+                               rc = LDAP_SUCCESS;
+                       }
+               }
+#ifdef LDAP_SLAPI
+               else if ( op->o_pb ) {
+                       /* try any computed attributes */
+                       computed_attr_context ctx;
+                       AttributeName aname;
+
+                       slapi_int_pblock_set_operation( op->o_pb, op );
+
+                       ctx.cac_pb = op->o_pb;
+                       ctx.cac_attrs = NULL;
+                       ctx.cac_userattrs = 0;
+                       ctx.cac_opattrs = 0;
+                       ctx.cac_acl_state = acl_state;
+                       ctx.cac_private = (void *)vals;
+
+                       if ( compute_evaluator( &ctx, entry_at->ad_cname.bv_val, e, backend_compute_output_attr ) == 1)
+                               rc = LDAP_INSUFFICIENT_ACCESS;
+                       else
+                               rc = LDAP_SUCCESS;
+               }
+#endif /* LDAP_SLAPI */
+freeit:                if (e != target ) {
+                       be_entry_release_r( op, e );
+               }
        }
 
-       return LDAP_UNWILLING_TO_PERFORM;
+       op->o_bd = be;
+       return rc;
 }
 
 Attribute *backend_operational(
-       Backend *be,
-       Connection *conn,
        Operation *op,
-       Entry *e,
-       AttributeName *attrs,
+       SlapReply *rs,
        int opattrs     )
 {
        Attribute *a = NULL, **ap = &a;
@@ -1140,16 +1598,53 @@ Attribute *backend_operational(
         * and the backend supports specific operational attributes, 
         * add them to the attribute list
         */
-       if ( opattrs || ( attrs &&
-               ad_inlist( slap_schema.si_ad_subschemaSubentry, attrs )) ) {
-               *ap = slap_operational_subschemaSubentry( be );
+       if ( opattrs || ( op->ors_attrs &&
+               ad_inlist( slap_schema.si_ad_subschemaSubentry, op->ors_attrs )) ) {
+               *ap = slap_operational_subschemaSubentry( op->o_bd );
                ap = &(*ap)->a_next;
        }
 
-       if ( ( opattrs || attrs ) && be && be->be_operational != NULL ) {
-               ( void )be->be_operational( be, conn, op, e, attrs, opattrs, ap );
+       if ( ( opattrs || op->ors_attrs ) && op->o_bd &&
+               op->o_bd->be_operational != NULL )
+       {
+               ( void )op->o_bd->be_operational( op, rs, opattrs, ap );
        }
 
        return a;
 }
 
+#ifdef LDAP_SLAPI
+static void init_group_pblock( Operation *op, Entry *target,
+       Entry *e, struct berval *op_ndn, AttributeDescription *group_at )
+{
+       slapi_int_pblock_set_operation( op->o_pb, op );
+       slapi_pblock_set( op->o_pb, SLAPI_X_GROUP_ENTRY, (void *)e );
+       slapi_pblock_set( op->o_pb, SLAPI_X_GROUP_OPERATION_DN, (void *)op_ndn->bv_val );
+       slapi_pblock_set( op->o_pb, SLAPI_X_GROUP_ATTRIBUTE, (void *)group_at->ad_cname.bv_val );
+       slapi_pblock_set( op->o_pb, SLAPI_X_GROUP_TARGET_ENTRY, (void *)target );
+}
+
+static int call_group_preop_plugins( Operation *op )
+{
+       int rc;
+
+       rc = slapi_int_call_plugins( op->o_bd, SLAPI_X_PLUGIN_PRE_GROUP_FN, op->o_pb );
+       if ( rc < 0 ) {
+               if (( slapi_pblock_get( op->o_pb, SLAPI_RESULT_CODE,
+                       (void *)&rc ) != 0 ) || rc == LDAP_SUCCESS )
+               {
+                       rc = LDAP_NO_SUCH_ATTRIBUTE;
+               }
+       } else {
+               rc = LDAP_SUCCESS;
+       }
+
+       return rc;
+}
+
+static void call_group_postop_plugins( Operation *op )
+{
+       (void) slapi_int_call_plugins( op->o_bd, SLAPI_X_PLUGIN_POST_GROUP_FN, op->o_pb );
+}
+#endif /* LDAP_SLAPI */
+