]> git.sur5r.net Git - openldap/blobdiff - servers/slapd/result.c
Preliminary checkin for new access_allowed() signature. Still need
[openldap] / servers / slapd / result.c
index 8a624c9ec48fb97841924d7e4e4518b8601a9855..2014864e856dc945a2439af5667095bc7d568d21 100644 (file)
@@ -2,7 +2,7 @@
 /* $OpenLDAP$ */
 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
  *
- * Copyright 1998-2005 The OpenLDAP Foundation.
+ * Copyright 1998-2009 The OpenLDAP Foundation.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
 
 #include "slap.h"
 
-#ifdef LDAP_SLAPI
-#include "slapi/slapi.h"
-
-static int call_pre_result_plugins( Operation *, SlapReply * );
-static int call_pre_referral_plugins( Operation *, SlapReply * );
-static int call_pre_entry_plugins( Operation *, SlapReply *, int * );
-#endif /* LDAP_SLAPI */
-
 const struct berval slap_dummy_bv = BER_BVNULL;
 
 int slap_null_cb( Operation *op, SlapReply *rs )
@@ -62,14 +54,6 @@ int slap_freeself_cb( Operation *op, SlapReply *rs )
        return SLAP_CB_CONTINUE;
 }
 
-int slap_replog_cb( Operation *op, SlapReply *rs )
-{
-       if ( rs->sr_err == LDAP_SUCCESS ) {
-               replog( op );
-       }
-       return SLAP_CB_CONTINUE;
-}
-
 static char *v2ref( BerVarray ref, const char *text )
 {
        size_t len = 0, i = 0;
@@ -90,11 +74,7 @@ static char *v2ref( BerVarray ref, const char *text )
                }
        }
 
-       v2 = SLAP_MALLOC( len+i+sizeof("Referral:") );
-       if( v2 == NULL ) {
-               Debug( LDAP_DEBUG_ANY, "v2ref: SLAP_MALLOC failed", 0, 0, 0 );
-               return NULL;
-       }
+       v2 = ch_malloc( len+i+sizeof("Referral:") );
 
        if( text != NULL ) {
                strcpy(v2, text);
@@ -106,11 +86,7 @@ static char *v2ref( BerVarray ref, const char *text )
        len += sizeof("Referral:");
 
        for( i=0; ref[i].bv_val != NULL; i++ ) {
-               v2 = SLAP_REALLOC( v2, len + ref[i].bv_len + 1 );
-               if( v2 == NULL ) {
-                       Debug( LDAP_DEBUG_ANY, "v2ref: SLAP_MALLOC failed", 0, 0, 0 );
-                       return NULL;
-               }
+               v2 = ch_realloc( v2, len + ref[i].bv_len + 1 );
                v2[len-1] = '\n';
                AC_MEMCPY(&v2[len], ref[i].bv_val, ref[i].bv_len );
                len += ref[i].bv_len;
@@ -123,7 +99,8 @@ static char *v2ref( BerVarray ref, const char *text )
        return v2;
 }
 
-static ber_tag_t req2res( ber_tag_t tag )
+ber_tag_t
+slap_req2res( ber_tag_t tag )
 {
        switch( tag ) {
        case LDAP_REQ_ADD:
@@ -155,37 +132,113 @@ static ber_tag_t req2res( ber_tag_t tag )
        return tag;
 }
 
+#ifdef RS_ASSERT
+#elif 0 && defined LDAP_DEVEL /* FIXME: this should not crash. ITS#5340. */
+#define RS_ASSERT assert
+#else
+#define RS_ASSERT(cond) ((void) 0)
+#endif
+
+/* Set rs->sr_entry after obyeing and clearing sr_flags & REP_ENTRY_MASK. */
+void
+rs_replace_entry( Operation *op, SlapReply *rs, slap_overinst *on, Entry *e )
+{
+       slap_mask_t e_flags = rs->sr_flags & REP_ENTRY_MUSTFLUSH;
+
+       if ( e_flags && rs->sr_entry != NULL ) {
+               RS_ASSERT( e_flags != REP_ENTRY_MUSTFLUSH );
+               if ( !(e_flags & REP_ENTRY_MUSTRELEASE) ) {
+                       entry_free( rs->sr_entry );
+               } else if ( on != NULL ) {
+                       overlay_entry_release_ov( op, rs->sr_entry, 0, on );
+               } else {
+                       be_entry_release_rw( op, rs->sr_entry, 0 );
+               }
+       }
+       rs->sr_flags &= ~REP_ENTRY_MASK;
+       rs->sr_entry = e;
+}
+
+/*
+ * Ensure rs->sr_entry is modifiable, by duplicating it if necessary.
+ * Obey sr_flags.  Set REP_ENTRY_<MODIFIABLE, and MUSTBEFREED if duplicated>.
+ * Return nonzero if rs->sr_entry was replaced.
+ */
+int
+rs_ensure_entry_modifiable( Operation *op, SlapReply *rs, slap_overinst *on )
+{
+       if ( rs->sr_flags & REP_ENTRY_MODIFIABLE ) {
+               RS_ASSERT((rs->sr_flags & REP_ENTRY_MUSTFLUSH)==REP_ENTRY_MUSTBEFREED);
+               return 0;
+       }
+       rs_replace_entry( op, rs, on, entry_dup( rs->sr_entry ));
+       rs->sr_flags |= REP_ENTRY_MODIFIABLE | REP_ENTRY_MUSTBEFREED;
+       return 1;
+}
+
 static long send_ldap_ber(
-       Connection *conn,
+       Operation *op,
        BerElement *ber )
 {
+       Connection *conn = op->o_conn;
        ber_len_t bytes;
+       long ret = 0;
 
        ber_get_option( ber, LBER_OPT_BER_BYTES_TO_WRITE, &bytes );
 
        /* write only one pdu at a time - wait til it's our turn */
-       ldap_pvt_thread_mutex_lock( &conn->c_write_mutex );
+       ldap_pvt_thread_mutex_lock( &conn->c_write1_mutex );
+       if (( op->o_abandon && !op->o_cancel ) || !connection_valid( conn ) ||
+               conn->c_writers < 0 ) {
+               ldap_pvt_thread_mutex_unlock( &conn->c_write1_mutex );
+               return 0;
+       }
+
+       conn->c_writers++;
 
-       /* lock the connection */ 
-       ldap_pvt_thread_mutex_lock( &conn->c_mutex );
+       while ( conn->c_writers > 0 && conn->c_writing ) {
+               ldap_pvt_thread_cond_wait( &conn->c_write1_cv, &conn->c_write1_mutex );
+       }
+
+       /* connection was closed under us */
+       if ( conn->c_writers < 0 ) {
+               /* we're the last waiter, let the closer continue */
+               if ( conn->c_writers == -1 )
+                       ldap_pvt_thread_cond_signal( &conn->c_write1_cv );
+               conn->c_writers++;
+               ldap_pvt_thread_mutex_unlock( &conn->c_write1_mutex );
+               return 0;
+       }
+
+       /* Our turn */
+       conn->c_writing = 1;
 
        /* write the pdu */
        while( 1 ) {
                int err;
-               ber_socket_t    sd;
-
-               if ( connection_state_closing( conn ) ) {
-                       ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
-                       ldap_pvt_thread_mutex_unlock( &conn->c_write_mutex );
 
-                       return 0;
+               /* lock the connection */ 
+               if ( ldap_pvt_thread_mutex_trylock( &conn->c_mutex )) {
+                       if ( !connection_valid(conn)) {
+                               ret = 0;
+                               break;
+                       }
+                       ldap_pvt_thread_mutex_unlock( &conn->c_write1_mutex );
+                       ldap_pvt_thread_mutex_lock( &conn->c_write1_mutex );
+                       if ( conn->c_writers < 0 ) {
+                               ret = 0;
+                               break;
+                       }
+                       continue;
                }
 
-               if ( ber_flush( conn->c_sb, ber, 0 ) == 0 ) {
+               if ( ber_flush2( conn->c_sb, ber, LBER_FLUSH_FREE_NEVER ) == 0 ) {
+                       ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
+                       ret = bytes;
                        break;
                }
 
-               err = errno;
+               err = sock_errno();
 
                /*
                 * we got an error.  if it's ewouldblock, we need to
@@ -193,31 +246,48 @@ static long send_ldap_ber(
                 * it's a hard error and return.
                 */
 
-               Debug( LDAP_DEBUG_CONNS, "ber_flush failed errno=%d reason=\"%s\"\n",
+               Debug( LDAP_DEBUG_CONNS, "ber_flush2 failed errno=%d reason=\"%s\"\n",
                    err, sock_errstr(err), 0 );
 
                if ( err != EWOULDBLOCK && err != EAGAIN ) {
-                       connection_closing( conn );
+                       conn->c_writers--;
+                       conn->c_writing = 0;
+                       ldap_pvt_thread_mutex_unlock( &conn->c_write1_mutex );
+                       connection_closing( conn, "connection lost on write" );
 
                        ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
-                       ldap_pvt_thread_mutex_unlock( &conn->c_write_mutex );
-
-                       return( -1 );
+                       return -1;
                }
 
                /* wait for socket to be write-ready */
+               ldap_pvt_thread_mutex_lock( &conn->c_write2_mutex );
                conn->c_writewaiter = 1;
-               ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
-               slapd_set_write( sd, 1 );
+               slapd_set_write( conn->c_sd, 2 );
 
-               ldap_pvt_thread_cond_wait( &conn->c_write_cv, &conn->c_mutex );
+               ldap_pvt_thread_mutex_unlock( &conn->c_write1_mutex );
+               ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
+               ldap_pvt_thread_cond_wait( &conn->c_write2_cv, &conn->c_write2_mutex );
                conn->c_writewaiter = 0;
+               ldap_pvt_thread_mutex_unlock( &conn->c_write2_mutex );
+               ldap_pvt_thread_mutex_lock( &conn->c_write1_mutex );
+               if ( conn->c_writers < 0 ) {
+                       ret = 0;
+                       break;
+               }
        }
 
-       ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
-       ldap_pvt_thread_mutex_unlock( &conn->c_write_mutex );
+       conn->c_writing = 0;
+       if ( conn->c_writers < 0 ) {
+               conn->c_writers++;
+               if ( !conn->c_writers )
+                       ldap_pvt_thread_cond_signal( &conn->c_write1_cv );
+       } else {
+               conn->c_writers--;
+               ldap_pvt_thread_cond_signal( &conn->c_write1_cv );
+       }
+       ldap_pvt_thread_mutex_unlock( &conn->c_write1_mutex );
 
-       return bytes;
+       return ret;
 }
 
 static int
@@ -250,39 +320,19 @@ static int
 send_ldap_controls( Operation *o, BerElement *ber, LDAPControl **c )
 {
        int rc;
-#ifdef LDAP_SLAPI
-       LDAPControl **sctrls = NULL;
-
-       /*
-        * Retrieve any additional controls that may be set by the
-        * plugin.
-        */
-
-       if ( o->o_pb &&
-               slapi_pblock_get( o->o_pb, SLAPI_RESCONTROLS, &sctrls ) != 0 )
-       {
-               sctrls = NULL;
-       }
 
-       if ( c == NULL && sctrls == NULL ) return 0;
-#else
-       if( c == NULL ) return 0;
-#endif /* LDAP_SLAPI */
+       if( c == NULL )
+               return 0;
 
        rc = ber_printf( ber, "t{"/*}*/, LDAP_TAG_CONTROLS );
        if( rc == -1 ) return rc;
 
-#ifdef LDAP_SLAPI
-       if ( c != NULL )
-#endif /* LDAP_SLAPI */
-       {
-               for( ; *c != NULL; c++) {
-                       rc = send_ldap_control( ber, *c );
-                       if( rc == -1 ) return rc;
-               }
+       for( ; *c != NULL; c++) {
+               rc = send_ldap_control( ber, *c );
+               if( rc == -1 ) return rc;
        }
 
-#ifdef LDAP_DEVEL
+#ifdef SLAP_CONTROL_X_SORTEDRESULTS
        /* this is a hack to avoid having to modify op->s_ctrls */
        if( o->o_sortedresults ) {
                BerElementBuffer berbuf;
@@ -294,33 +344,119 @@ send_ldap_controls( Operation *o, BerElement *ber, LDAPControl **c )
 
                ber_init2( sber, NULL, LBER_USE_DER );
 
-               ber_printf( sber, "{i}", LDAP_UNWILLING_TO_PERFORM );
+               ber_printf( sber, "{e}", LDAP_UNWILLING_TO_PERFORM );
 
-               if( ber_flatten2( ber, &sorted.ldctl_value, 0 ) == -1 ) {
+               if( ber_flatten2( sber, &sorted.ldctl_value, 0 ) == -1 ) {
                        return -1;
                }
 
-               (void) ber_free_buf( ber );
+               (void) ber_free_buf( sber );
 
                rc = send_ldap_control( ber, &sorted );
                if( rc == -1 ) return rc;
        }
 #endif
 
-#ifdef LDAP_SLAPI
-       if ( sctrls != NULL ) {
-               for ( c = sctrls; *c != NULL; c++ ) {
-                       rc = send_ldap_control( ber, *c );
-                       if( rc == -1 ) return rc;
+       rc = ber_printf( ber, /*{*/"N}" );
+
+       return rc;
+}
+
+/*
+ * slap_response_play()
+ *
+ * plays the callback list; rationale: a callback can
+ *   - remove itself from the list, by setting op->o_callback = NULL;
+ *     malloc()'ed callbacks should free themselves from inside the
+ *     sc_response() function.
+ *   - replace itself with another (list of) callback(s), by setting
+ *     op->o_callback = a new (list of) callback(s); in this case, it
+ *     is the callback's responsibility to to append existing subsequent
+ *     callbacks to the end of the list that is passed to the sc_response()
+ *     function.
+ *   - modify the list of subsequent callbacks by modifying the value
+ *     of the sc_next field from inside the sc_response() function; this
+ *     case does not require any handling from inside slap_response_play()
+ *
+ * To stop execution of the playlist, the sc_response() function must return
+ * a value different from SLAP_SC_CONTINUE.
+ *
+ * The same applies to slap_cleanup_play(); only, there is no means to stop
+ * execution of the playlist, since all cleanup functions must be called.
+ */
+static int
+slap_response_play(
+       Operation *op,
+       SlapReply *rs )
+{
+       int rc;
+
+       slap_callback   *sc = op->o_callback, **scp;
+
+       rc = SLAP_CB_CONTINUE;
+       for ( scp = &sc; *scp; ) {
+               slap_callback *sc_next = (*scp)->sc_next, **sc_nextp = &(*scp)->sc_next;
+
+               op->o_callback = *scp;
+               if ( op->o_callback->sc_response ) {
+                       rc = op->o_callback->sc_response( op, rs );
+                       if ( op->o_callback == NULL ) {
+                               /* the callback has been removed;
+                                * repair the list */
+                               *scp = sc_next;
+                               sc_nextp = scp;
+
+                       } else if ( op->o_callback != *scp ) {
+                               /* a new callback has been inserted
+                                * in place of the existing one; repair the list */
+                               *scp = op->o_callback;
+                               sc_nextp = scp;
+                       }
+                       if ( rc != SLAP_CB_CONTINUE ) break;
                }
+               scp = sc_nextp;
        }
-#endif /* LDAP_SLAPI */
-
-       rc = ber_printf( ber, /*{*/"N}" );
 
+       op->o_callback = sc;
        return rc;
 }
 
+static int
+slap_cleanup_play(
+       Operation *op,
+       SlapReply *rs )
+{
+       slap_callback   *sc = op->o_callback, **scp;
+
+       for ( scp = &sc; *scp; ) {
+               slap_callback *sc_next = (*scp)->sc_next, **sc_nextp = &(*scp)->sc_next;
+
+               op->o_callback = *scp;
+               if ( op->o_callback->sc_cleanup ) {
+                       (void)op->o_callback->sc_cleanup( op, rs );
+                       if ( op->o_callback == NULL ) {
+                               /* the callback has been removed;
+                                * repair the list */
+                               *scp = sc_next;
+                               sc_nextp = scp;
+
+                       } else if ( op->o_callback != *scp ) {
+                               /* a new callback has been inserted
+                                * after the existing one; repair the list */
+                               /* a new callback has been inserted
+                                * in place of the existing one; repair the list */
+                               *scp = op->o_callback;
+                               sc_nextp = scp;
+                       }
+                       /* don't care about the result; do all cleanup */
+               }
+               scp = sc_nextp;
+       }
+
+       op->o_callback = sc;
+       return LDAP_SUCCESS;
+}
+
 static int
 send_ldap_response(
        Operation *op,
@@ -331,31 +467,16 @@ send_ldap_response(
        int             rc = LDAP_SUCCESS;
        long    bytes;
 
-       if ( rs->sr_err == SLAPD_ABANDON ) {
+       if (( rs->sr_err == SLAPD_ABANDON || op->o_abandon ) && !op->o_cancel ) {
                rc = SLAPD_ABANDON;
                goto clean2;
        }
 
        if ( op->o_callback ) {
-               int             first = 1;
-               slap_callback   *sc = op->o_callback,
-                               *sc_next = op->o_callback;
-
-               rc = SLAP_CB_CONTINUE;
-               for ( sc_next = op->o_callback; sc_next; op->o_callback = sc_next) {
-                       sc_next = op->o_callback->sc_next;
-                       if ( op->o_callback->sc_response ) {
-                               rc = op->o_callback->sc_response( op, rs );
-                               if ( first && op->o_callback == NULL ) {
-                                       sc = NULL;
-                               }
-                               if ( rc != SLAP_CB_CONTINUE ) break;
-                       }
-                       first = 0;
+               rc = slap_response_play( op, rs );
+               if ( rc != SLAP_CB_CONTINUE ) {
+                       goto clean2;
                }
-
-               op->o_callback = sc;
-               if ( rc != SLAP_CB_CONTINUE ) goto clean2;
        }
 
 #ifdef LDAP_CONNECTIONLESS
@@ -368,9 +489,13 @@ send_ldap_response(
                ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
        }
 
+       rc = rs->sr_err;
+       if ( rc == SLAPD_ABANDON && op->o_cancel )
+               rc = LDAP_CANCELLED;
+
        Debug( LDAP_DEBUG_TRACE,
                "send_ldap_response: msgid=%d tag=%lu err=%d\n",
-               rs->sr_msgid, rs->sr_tag, rs->sr_err );
+               rs->sr_msgid, rs->sr_tag, rc );
 
        if( rs->sr_ref ) {
                Debug( LDAP_DEBUG_ARGS, "send_ldap_response: ref=\"%s\"\n",
@@ -383,7 +508,7 @@ send_ldap_response(
                op->o_protocol == LDAP_VERSION2 )
        {
                rc = ber_printf( ber, "t{ess" /*"}"*/,
-                       rs->sr_tag, rs->sr_err,
+                       rs->sr_tag, rc,
                rs->sr_matched == NULL ? "" : rs->sr_matched,
                rs->sr_text == NULL ? "" : rs->sr_text );
        } else 
@@ -394,7 +519,7 @@ send_ldap_response(
 
        } else {
            rc = ber_printf( ber, "{it{ess" /*"}}"*/,
-               rs->sr_msgid, rs->sr_tag, rs->sr_err,
+               rs->sr_msgid, rs->sr_tag, rc,
                rs->sr_matched == NULL ? "" : rs->sr_matched,
                rs->sr_text == NULL ? "" : rs->sr_text );
        }
@@ -464,7 +589,7 @@ send_ldap_response(
        }
 
        /* send BER */
-       bytes = send_ldap_ber( op->o_conn, ber );
+       bytes = send_ldap_ber( op, ber );
 #ifdef LDAP_CONNECTIONLESS
        if (!op->o_conn || op->o_conn->c_is_udp == 0)
 #endif
@@ -480,19 +605,10 @@ send_ldap_response(
                goto cleanup;
        }
 
-#ifdef LDAP_SLAPI
-       if ( op->o_pb ) {
-               slapi_pblock_set( op->o_pb, SLAPI_RESULT_CODE, (void *)rs->sr_err );
-               slapi_pblock_set( op->o_pb, SLAPI_RESULT_MATCHED,
-                       (void *)rs->sr_matched );
-               slapi_pblock_set( op->o_pb, SLAPI_RESULT_TEXT, (void *)rs->sr_text );
-       }
-#endif /* LDAP_SLAPI */
-
-       ldap_pvt_thread_mutex_lock( &slap_counters.sc_sent_mutex );
-       ldap_pvt_mp_add_ulong( slap_counters.sc_pdu, 1 );
-       ldap_pvt_mp_add_ulong( slap_counters.sc_bytes, (unsigned long)bytes );
-       ldap_pvt_thread_mutex_unlock( &slap_counters.sc_sent_mutex );
+       ldap_pvt_thread_mutex_lock( &op->o_counters->sc_mutex );
+       ldap_pvt_mp_add_ulong( op->o_counters->sc_pdu, 1 );
+       ldap_pvt_mp_add_ulong( op->o_counters->sc_bytes, (unsigned long)bytes );
+       ldap_pvt_thread_mutex_unlock( &op->o_counters->sc_mutex );
 
 cleanup:;
        /* Tell caller that we did this for real, as opposed to being
@@ -502,31 +618,31 @@ cleanup:;
 
 clean2:;
        if ( op->o_callback ) {
-               int             first = 1;
-               slap_callback   *sc = op->o_callback, *sc_next;
-
-               for ( sc_next = op->o_callback; sc_next; op->o_callback = sc_next) {
-                       sc_next = op->o_callback->sc_next;
-                       if ( op->o_callback->sc_cleanup ) {
-                               (void)op->o_callback->sc_cleanup( op, rs );
-                               if ( first && op->o_callback != sc ) {
-                                       sc = op->o_callback;
-                               }
-                       }
-                       first = 0;
-               }
-               op->o_callback = sc;
+               (void)slap_cleanup_play( op, rs );
        }
 
+       if ( rs->sr_flags & REP_MATCHED_MUSTBEFREED ) {
+               rs->sr_flags ^= REP_MATCHED_MUSTBEFREED; /* paranoia */
+               if ( rs->sr_matched ) {
+                       free( (char *)rs->sr_matched );
+                       rs->sr_matched = NULL;
+               }
+       }
 
-       if ( rs->sr_matched && rs->sr_flags & REP_MATCHED_MUSTBEFREED ) {
-               free( (char *)rs->sr_matched );
-               rs->sr_matched = NULL;
+       if ( rs->sr_flags & REP_REF_MUSTBEFREED ) {
+               rs->sr_flags ^= REP_REF_MUSTBEFREED; /* paranoia */
+               if ( rs->sr_ref ) {
+                       ber_bvarray_free( rs->sr_ref );
+                       rs->sr_ref = NULL;
+               }
        }
 
-       if ( rs->sr_ref && rs->sr_flags & REP_REF_MUSTBEFREED ) {
-               ber_bvarray_free( rs->sr_ref );
-               rs->sr_ref = NULL;
+       if ( rs->sr_flags & REP_CTRLS_MUSTBEFREED ) {
+               rs->sr_flags ^= REP_CTRLS_MUSTBEFREED; /* paranoia */
+               if ( rs->sr_ctrls ) {
+                       slap_free_ctrls( op, rs->sr_ctrls );
+                       rs->sr_ctrls = NULL;
+               }
        }
 
        return rc;
@@ -544,6 +660,7 @@ send_ldap_disconnect( Operation     *op, SlapReply *rs )
        assert( LDAP_UNSOLICITED_ERROR( rs->sr_err ) );
 
        rs->sr_type = REP_EXTENDED;
+       rs->sr_rspdata = NULL;
 
        Debug( LDAP_DEBUG_TRACE,
                "send_ldap_disconnect %d:%s\n",
@@ -551,13 +668,13 @@ send_ldap_disconnect( Operation   *op, SlapReply *rs )
 
        if ( op->o_protocol < LDAP_VERSION3 ) {
                rs->sr_rspoid = NULL;
-               rs->sr_tag = req2res( op->o_tag );
+               rs->sr_tag = slap_req2res( op->o_tag );
                rs->sr_msgid = (rs->sr_tag != LBER_SEQUENCE) ? op->o_msgid : 0;
 
        } else {
                rs->sr_rspoid = LDAP_NOTICE_DISCONNECT;
                rs->sr_tag = LDAP_RES_EXTENDED;
-               rs->sr_msgid = 0;
+               rs->sr_msgid = LDAP_RES_UNSOLICITED;
        }
 
        if ( send_ldap_response( op, rs ) == SLAP_CB_CONTINUE ) {
@@ -578,7 +695,7 @@ slap_send_ldap_result( Operation *op, SlapReply *rs )
        rs->sr_type = REP_RESULT;
 
        /* Propagate Abandons so that cleanup callbacks can be processed */
-       if ( rs->sr_err == SLAPD_ABANDON )
+       if ( rs->sr_err == SLAPD_ABANDON || op->o_abandon )
                goto abandon;
 
        assert( !LDAP_API_ERROR( rs->sr_err ) );
@@ -603,11 +720,8 @@ slap_send_ldap_result( Operation *op, SlapReply *rs )
        assert( rs->sr_err != LDAP_PARTIAL_RESULTS );
 
        if ( rs->sr_err == LDAP_REFERRAL ) {
-#ifdef LDAP_CONTROL_X_DOMAIN_SCOPE
-               if( op->o_domain_scope ) {
-                       rs->sr_ref = NULL;
-               }
-#endif
+               if( op->o_domain_scope ) rs->sr_ref = NULL;
+
                if( rs->sr_ref == NULL ) {
                        rs->sr_err = LDAP_NO_SUCH_OBJECT;
                } else if ( op->o_protocol < LDAP_VERSION3 ) {
@@ -615,30 +729,30 @@ slap_send_ldap_result( Operation *op, SlapReply *rs )
                }
        }
 
-#ifdef LDAP_SLAPI
-       (void) call_pre_result_plugins( op, rs );
-#endif /* LDAP_SLAPI */
-
        if ( op->o_protocol < LDAP_VERSION3 ) {
                tmp = v2ref( rs->sr_ref, rs->sr_text );
                rs->sr_text = tmp;
                rs->sr_ref = NULL;
        }
 
-       rs->sr_tag = req2res( op->o_tag );
+abandon:
+       rs->sr_tag = slap_req2res( op->o_tag );
        rs->sr_msgid = (rs->sr_tag != LBER_SEQUENCE) ? op->o_msgid : 0;
 
-abandon:
+       if ( rs->sr_flags & REP_REF_MUSTBEFREED ) {
+               if ( rs->sr_ref == NULL ) {
+                       rs->sr_flags ^= REP_REF_MUSTBEFREED;
+                       ber_bvarray_free( oref );
+               }
+               oref = NULL; /* send_ldap_response() will free rs->sr_ref if != NULL */
+       }
+
        if ( send_ldap_response( op, rs ) == SLAP_CB_CONTINUE ) {
                if ( op->o_tag == LDAP_REQ_SEARCH ) {
-                       char nbuf[64];
-                       snprintf( nbuf, sizeof nbuf, "%d nentries=%d",
-                               rs->sr_err, rs->sr_nentries );
-
                        Statslog( LDAP_DEBUG_STATS,
-                       "%s SEARCH RESULT tag=%lu err=%s text=%s\n",
-                               op->o_log_prefix, rs->sr_tag, nbuf,
-                               rs->sr_text ? rs->sr_text : "", 0 );
+                               "%s SEARCH RESULT tag=%lu err=%d nentries=%d text=%s\n",
+                               op->o_log_prefix, rs->sr_tag, rs->sr_err,
+                               rs->sr_nentries, rs->sr_text ? rs->sr_text : "" );
                } else {
                        Statslog( LDAP_DEBUG_STATS,
                                "%s RESULT tag=%lu err=%d text=%s\n",
@@ -660,10 +774,15 @@ send_ldap_sasl( Operation *op, SlapReply *rs )
                rs->sr_err,
                rs->sr_sasldata ? (long) rs->sr_sasldata->bv_len : -1, NULL );
 
-       rs->sr_tag = req2res( op->o_tag );
+       rs->sr_tag = slap_req2res( op->o_tag );
        rs->sr_msgid = (rs->sr_tag != LBER_SEQUENCE) ? op->o_msgid : 0;
 
-       send_ldap_response( op, rs );
+       if ( send_ldap_response( op, rs ) == SLAP_CB_CONTINUE ) {
+               Statslog( LDAP_DEBUG_STATS,
+                       "%s RESULT tag=%lu err=%d text=%s\n",
+                       op->o_log_prefix, rs->sr_tag, rs->sr_err,
+                       rs->sr_text ? rs->sr_text : "", 0 );
+       }
 }
 
 void
@@ -677,10 +796,15 @@ slap_send_ldap_extended( Operation *op, SlapReply *rs )
                rs->sr_rspoid ? rs->sr_rspoid : "",
                rs->sr_rspdata != NULL ? rs->sr_rspdata->bv_len : 0 );
 
-       rs->sr_tag = req2res( op->o_tag );
+       rs->sr_tag = slap_req2res( op->o_tag );
        rs->sr_msgid = (rs->sr_tag != LBER_SEQUENCE) ? op->o_msgid : 0;
 
-       send_ldap_response( op, rs );
+       if ( send_ldap_response( op, rs ) == SLAP_CB_CONTINUE ) {
+               Statslog( LDAP_DEBUG_STATS,
+                       "%s RESULT oid=%s err=%d text=%s\n",
+                       op->o_log_prefix, rs->sr_rspoid ? rs->sr_rspoid : "",
+                       rs->sr_err, rs->sr_text ? rs->sr_text : "", 0 );
+       }
 }
 
 void
@@ -694,33 +818,54 @@ slap_send_ldap_intermediate( Operation *op, SlapReply *rs )
                rs->sr_rspdata != NULL ? rs->sr_rspdata->bv_len : 0 );
        rs->sr_tag = LDAP_RES_INTERMEDIATE;
        rs->sr_msgid = op->o_msgid;
-       send_ldap_response( op, rs );
+       if ( send_ldap_response( op, rs ) == SLAP_CB_CONTINUE ) {
+               Statslog( LDAP_DEBUG_STATS2,
+                       "%s INTERM oid=%s\n",
+                       op->o_log_prefix,
+                       rs->sr_rspoid ? rs->sr_rspoid : "", 0, 0, 0 );
+       }
 }
 
+/*
+ * returns:
+ *
+ * LDAP_SUCCESS                        entry sent
+ * LDAP_OTHER                  entry not sent (other)
+ * LDAP_INSUFFICIENT_ACCESS    entry not sent (ACL)
+ * LDAP_UNAVAILABLE            entry not sent (connection closed)
+ * LDAP_SIZELIMIT_EXCEEDED     entry not sent (caller must send sizelimitExceeded)
+ */
+
 int
 slap_send_search_entry( Operation *op, SlapReply *rs )
 {
        BerElementBuffer berbuf;
        BerElement      *ber = (BerElement *) &berbuf;
        Attribute       *a;
-       int             i, j, rc=-1, bytes;
-       char            *edn;
+       int             i, j, rc = LDAP_UNAVAILABLE, bytes;
        int             userattrs;
        AccessControlState acl_state = ACL_STATE_INIT;
-#ifdef LDAP_SLAPI
-       /* Support for computed attribute plugins */
-       computed_attr_context    ctx;
-       AttributeName           *anp;
-#endif
        int                      attrsonly;
        AttributeDescription *ad_entry = slap_schema.si_ad_entry;
+       AclCheck        ak;
 
        /* a_flags: array of flags telling if the i-th element will be
         *          returned or filtered out
         * e_flags: array of a_flags
         */
        char **e_flags = NULL;
-       
+
+       if ( op->ors_slimit >= 0 && rs->sr_nentries >= op->ors_slimit ) {
+               return LDAP_SIZELIMIT_EXCEEDED;
+       }
+
+       /* Every 64 entries, check for thread pool pause */
+       if ( ( ( rs->sr_nentries & 0x3f ) == 0x3f ) &&
+               ldap_pvt_thread_pool_pausing( &connection_pool ) > 0 )
+       {
+               return LDAP_BUSY;
+       }
+
        rs->sr_type = REP_SEARCH;
 
        /* eventually will loop through generated operational attribute types
@@ -729,7 +874,7 @@ slap_send_search_entry( Operation *op, SlapReply *rs )
        /* NOTE: moved before overlays callback circling because
         * they may modify entry and other stuff in rs */
        /* check for special all operational attributes ("+") type */
-       /* FIXME: maybe we could se this flag at the operation level;
+       /* FIXME: maybe we could set this flag at the operation level;
         * however, in principle the caller of send_search_entry() may
         * change the attribute list at each call */
        rs->sr_attr_flags = slap_attr_flags( rs->sr_attrs );
@@ -740,25 +885,10 @@ slap_send_search_entry( Operation *op, SlapReply *rs )
        }
 
        if ( op->o_callback ) {
-               int             first = 1;
-               slap_callback   *sc = op->o_callback,
-                               *sc_next = op->o_callback;
-
-               rc = SLAP_CB_CONTINUE;
-               for ( sc_next = op->o_callback; sc_next; op->o_callback = sc_next) {
-                       sc_next = op->o_callback->sc_next;
-                       if ( op->o_callback->sc_response ) {
-                               rc = op->o_callback->sc_response( op, rs );
-                               if ( first && op->o_callback == NULL ) {
-                                       sc = NULL;
-                               }
-                               if ( rc != SLAP_CB_CONTINUE ) break;
-                       }
-                       first = 0;
+               rc = slap_response_play( op, rs );
+               if ( rc != SLAP_CB_CONTINUE ) {
+                       goto error_return;
                }
-
-               op->o_callback = sc;
-               if ( rc != SLAP_CB_CONTINUE ) goto error_return;
        }
 
        Debug( LDAP_DEBUG_TRACE, "=> send_search_entry: conn %lu dn=\"%s\"%s\n",
@@ -767,24 +897,20 @@ slap_send_search_entry( Operation *op, SlapReply *rs )
 
        attrsonly = op->ors_attrsonly;
 
-#ifdef notdef
-       rc = call_pre_entry_plugins( op, rs, &attrsonly );
-       if ( rc < 0 ) {
-               goto error_return;
-       }
-#endif /* LDAP_SLAPI */
-
-       if ( !access_allowed( op, rs->sr_entry, ad_entry, NULL, ACL_READ, NULL )) {
+       ak.ak_e = rs->sr_entry;
+       ak.ak_desc = ad_entry;
+       ak.ak_val = NULL;
+       ak.ak_access = ACL_READ;
+       ak.ak_state = NULL;
+       if ( !access_allowed( op, &ak )) {
                Debug( LDAP_DEBUG_ACL,
                        "send_search_entry: conn %lu access to entry (%s) not allowed\n", 
                        op->o_connid, rs->sr_entry->e_name.bv_val, 0 );
 
-               rc = 1;
+               rc = LDAP_INSUFFICIENT_ACCESS;
                goto error_return;
        }
 
-       edn = rs->sr_entry->e_nname.bv_val;
-
        if ( op->o_res_ber ) {
                /* read back control or LDAP_CONNECTIONLESS */
            ber = op->o_res_ber;
@@ -792,7 +918,7 @@ slap_send_search_entry( Operation *op, SlapReply *rs )
                struct berval   bv;
 
                bv.bv_len = entry_flatsize( rs->sr_entry, 0 );
-               bv.bv_val = op->o_tmpalloc(bv.bv_len, op->o_tmpmemctx );
+               bv.bv_val = op->o_tmpalloc( bv.bv_len, op->o_tmpmemctx );
 
                ber_init2( ber, &bv, LBER_USE_DER );
                ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
@@ -825,6 +951,7 @@ slap_send_search_entry( Operation *op, SlapReply *rs )
 
                if ( op->o_res_ber == NULL ) ber_free_buf( ber );
                send_ldap_error( op, rs, LDAP_OTHER, "encoding DN error" );
+               rc = rs->sr_err;
                goto error_return;
        }
 
@@ -850,7 +977,7 @@ slap_send_search_entry( Operation *op, SlapReply *rs )
                        if( e_flags == NULL ) {
                        Debug( LDAP_DEBUG_ANY, 
                                        "send_search_entry: conn %lu slap_sl_calloc failed\n",
-                                       op->o_connid ? op->o_connid : 0, 0, 0 );
+                                       op->o_connid, 0, 0 );
                                ber_free( ber, 1 );
        
                                send_ldap_error( op, rs, LDAP_OTHER, "out of memory" );
@@ -868,21 +995,23 @@ slap_send_search_entry( Operation *op, SlapReply *rs )
                        if ( rc == -1 ) {
                                Debug( LDAP_DEBUG_ANY, "send_search_entry: "
                                        "conn %lu matched values filtering failed\n",
-                                       op->o_connid ? op->o_connid : 0, 0, 0 );
+                                       op->o_connid, 0, 0 );
                                if ( op->o_res_ber == NULL ) ber_free_buf( ber );
                                send_ldap_error( op, rs, LDAP_OTHER,
                                        "matched values filtering error" );
+                               rc = rs->sr_err;
                                goto error_return;
                        }
                }
        }
 
+       ak.ak_state = &acl_state;
        for ( a = rs->sr_entry->e_attrs, j = 0; a != NULL; a = a->a_next, j++ ) {
                AttributeDescription *desc = a->a_desc;
                int finish = 0;
 
                if ( rs->sr_attrs == NULL ) {
-                       /* all attrs request, skip operational attributes */
+                       /* all user attrs request, skip operational attributes */
                        if( is_at_operational( desc->ad_type ) ) {
                                continue;
                        }
@@ -890,23 +1019,26 @@ slap_send_search_entry( Operation *op, SlapReply *rs )
                } else {
                        /* specific attrs requested */
                        if ( is_at_operational( desc->ad_type ) ) {
-                               if ( !SLAP_OPATTRS( rs->sr_attr_flags ) &&
-                                               !ad_inlist( desc, rs->sr_attrs ) )
-                               {
-                                       continue;
+                               /* if not explicitly requested */
+                               if ( !ad_inlist( desc, rs->sr_attrs )) {
+                                       /* if not all op attrs requested, skip */
+                                       if ( !SLAP_OPATTRS( rs->sr_attr_flags ))
+                                               continue;
+                                       /* if DSA-specific and replicating, skip */
+                                       if ( op->o_sync != SLAP_CONTROL_NONE &&
+                                               desc->ad_type->sat_usage == LDAP_SCHEMA_DSA_OPERATION )
+                                               continue;
                                }
-
                        } else {
-                               if ( !userattrs && !ad_inlist( desc, rs->sr_attrs ) )
-                               {
+                               if ( !userattrs && !ad_inlist( desc, rs->sr_attrs ) ) {
                                        continue;
                                }
                        }
                }
 
+               ak.ak_desc = desc;
                if ( attrsonly ) {
-                       if ( ! access_allowed( op, rs->sr_entry, desc, NULL,
-                               ACL_READ, &acl_state ) )
+                       if ( ! access_allowed( op, &ak ))
                        {
                                Debug( LDAP_DEBUG_ACL, "send_search_entry: "
                                        "conn %lu access to attribute %s not allowed\n",
@@ -922,6 +1054,7 @@ slap_send_search_entry( Operation *op, SlapReply *rs )
                                if ( op->o_res_ber == NULL ) ber_free_buf( ber );
                                send_ldap_error( op, rs, LDAP_OTHER,
                                        "encoding description error");
+                               rc = rs->sr_err;
                                goto error_return;
                        }
                        finish = 1;
@@ -929,8 +1062,8 @@ slap_send_search_entry( Operation *op, SlapReply *rs )
                } else {
                        int first = 1;
                        for ( i = 0; a->a_nvals[i].bv_val != NULL; i++ ) {
-                               if ( ! access_allowed( op, rs->sr_entry,
-                                       desc, &a->a_nvals[i], ACL_READ, &acl_state ) )
+                               ak.ak_val = &a->a_nvals[i];
+                               if ( ! access_allowed( op, &ak ))
                                {
                                        Debug( LDAP_DEBUG_ACL,
                                                "send_search_entry: conn %lu "
@@ -955,6 +1088,7 @@ slap_send_search_entry( Operation *op, SlapReply *rs )
                                                if ( op->o_res_ber == NULL ) ber_free_buf( ber );
                                                send_ldap_error( op, rs, LDAP_OTHER,
                                                        "encoding description error");
+                                               rc = rs->sr_err;
                                                goto error_return;
                                        }
                                }
@@ -966,6 +1100,7 @@ slap_send_search_entry( Operation *op, SlapReply *rs )
                                        if ( op->o_res_ber == NULL ) ber_free_buf( ber );
                                        send_ldap_error( op, rs, LDAP_OTHER,
                                                "encoding values error" );
+                                       rc = rs->sr_err;
                                        goto error_return;
                                }
                        }
@@ -978,6 +1113,7 @@ slap_send_search_entry( Operation *op, SlapReply *rs )
 
                        if ( op->o_res_ber == NULL ) ber_free_buf( ber );
                        send_ldap_error( op, rs, LDAP_OTHER, "encode end error" );
+                       rc = rs->sr_err;
                        goto error_return;
                }
        }
@@ -1027,10 +1163,11 @@ slap_send_search_entry( Operation *op, SlapReply *rs )
                                Debug( LDAP_DEBUG_ANY,
                                        "send_search_entry: conn %lu "
                                        "matched values filtering failed\n", 
-                                       op->o_connid ? op->o_connid : 0, 0, 0);
+                                       op->o_connid, 0, 0);
                                if ( op->o_res_ber == NULL ) ber_free_buf( ber );
                                send_ldap_error( op, rs, LDAP_OTHER,
                                        "matched values filtering error" );
+                               rc = rs->sr_err;
                                goto error_return;
                        }
                }
@@ -1040,7 +1177,7 @@ slap_send_search_entry( Operation *op, SlapReply *rs )
                AttributeDescription *desc = a->a_desc;
 
                if ( rs->sr_attrs == NULL ) {
-                       /* all attrs request, skip operational attributes */
+                       /* all user attrs request, skip operational attributes */
                        if( is_at_operational( desc->ad_type ) ) {
                                continue;
                        }
@@ -1049,7 +1186,7 @@ slap_send_search_entry( Operation *op, SlapReply *rs )
                        /* specific attrs requested */
                        if( is_at_operational( desc->ad_type ) ) {
                                if ( !SLAP_OPATTRS( rs->sr_attr_flags ) && 
-                                               !ad_inlist( desc, rs->sr_attrs ) )
+                                       !ad_inlist( desc, rs->sr_attrs ) )
                                {
                                        continue;
                                }
@@ -1060,8 +1197,8 @@ slap_send_search_entry( Operation *op, SlapReply *rs )
                        }
                }
 
-               if ( ! access_allowed( op, rs->sr_entry, desc, NULL,
-                       ACL_READ, &acl_state ) )
+               ak.ak_desc = desc;
+               if ( ! access_allowed( op, &ak ))
                {
                        Debug( LDAP_DEBUG_ACL,
                                "send_search_entry: conn %lu "
@@ -1080,13 +1217,14 @@ slap_send_search_entry( Operation *op, SlapReply *rs )
                        if ( op->o_res_ber == NULL ) ber_free_buf( ber );
                        send_ldap_error( op, rs, LDAP_OTHER,
                                "encoding description error" );
+                       rc = rs->sr_err;
                        goto error_return;
                }
 
                if ( ! attrsonly ) {
                        for ( i = 0; a->a_vals[i].bv_val != NULL; i++ ) {
-                               if ( ! access_allowed( op, rs->sr_entry,
-                                       desc, &a->a_vals[i], ACL_READ, &acl_state ) )
+                               ak.ak_val = &a->a_vals[i];
+                               if ( ! access_allowed( op, &ak ))
                                {
                                        Debug( LDAP_DEBUG_ACL,
                                                "send_search_entry: conn %lu "
@@ -1108,6 +1246,7 @@ slap_send_search_entry( Operation *op, SlapReply *rs )
                                        if ( op->o_res_ber == NULL ) ber_free_buf( ber );
                                        send_ldap_error( op, rs, LDAP_OTHER,
                                                "encoding values error" );
+                                       rc = rs->sr_err;
                                        goto error_return;
                                }
                        }
@@ -1120,50 +1259,11 @@ slap_send_search_entry( Operation *op, SlapReply *rs )
 
                        if ( op->o_res_ber == NULL ) ber_free_buf( ber );
                        send_ldap_error( op, rs, LDAP_OTHER, "encode end error" );
+                       rc = rs->sr_err;
                        goto error_return;
                }
        }
 
-#ifdef LDAP_SLAPI
-       /*
-        * First, setup the computed attribute context that is
-        * passed to all plugins.
-        */
-       if ( op->o_pb ) {
-               ctx.cac_pb = op->o_pb;
-               ctx.cac_attrs = rs->sr_attrs;
-               ctx.cac_attrsonly = attrsonly;
-               ctx.cac_userattrs = userattrs;
-               ctx.cac_opattrs = rs->sr_attr_flags;
-               ctx.cac_acl_state = acl_state;
-               ctx.cac_private = (void *)ber;
-
-               /*
-                * For each client requested attribute, call the plugins.
-                */
-               if ( rs->sr_attrs != NULL ) {
-                       for ( anp = rs->sr_attrs; anp->an_name.bv_val != NULL; anp++ ) {
-                               rc = compute_evaluator( &ctx, anp->an_name.bv_val,
-                                       rs->sr_entry, slapi_int_compute_output_ber );
-                               if ( rc == 1 ) break;
-                       }
-               } else {
-                       /*
-                        * Technically we shouldn't be returning operational attributes
-                        * when the user requested only user attributes. We'll let the
-                        * plugin decide whether to be naughty or not.
-                        */
-                       rc = compute_evaluator( &ctx, "*",
-                               rs->sr_entry, slapi_int_compute_output_ber );
-               }
-               if ( rc == 1 ) {
-                       if ( op->o_res_ber == NULL ) ber_free_buf( ber );
-                       send_ldap_error( op, rs, LDAP_OTHER, "computed attribute error" );
-                       goto error_return;
-               }
-       }
-#endif /* LDAP_SLAPI */
-
        /* free e_flags */
        if ( e_flags ) {
                slap_sl_free( e_flags, op->o_tmpmemctx );
@@ -1194,10 +1294,13 @@ slap_send_search_entry( Operation *op, SlapReply *rs )
 
                if ( op->o_res_ber == NULL ) ber_free_buf( ber );
                send_ldap_error( op, rs, LDAP_OTHER, "encode entry end error" );
-               rc = 1;
+               rc = rs->sr_err;
                goto error_return;
        }
 
+       Statslog( LDAP_DEBUG_STATS2, "%s ENTRY dn=\"%s\"\n",
+           op->o_log_prefix, rs->sr_entry->e_nname.bv_val, 0, 0, 0 );
+
        if ( rs->sr_flags & REP_ENTRY_MUSTRELEASE ) {
                be_entry_release_rw( op, rs->sr_entry, 0 );
                rs->sr_flags ^= REP_ENTRY_MUSTRELEASE;
@@ -1205,7 +1308,7 @@ slap_send_search_entry( Operation *op, SlapReply *rs )
        }
 
        if ( op->o_res_ber == NULL ) {
-               bytes = send_ldap_ber( op->o_conn, ber );
+               bytes = send_ldap_ber( op, ber );
                ber_free_buf( ber );
 
                if ( bytes < 0 ) {
@@ -1213,42 +1316,26 @@ slap_send_search_entry( Operation *op, SlapReply *rs )
                                "send_search_entry: conn %lu  ber write failed.\n", 
                                op->o_connid, 0, 0 );
 
-                       rc = -1;
+                       rc = LDAP_UNAVAILABLE;
                        goto error_return;
                }
                rs->sr_nentries++;
 
-               ldap_pvt_thread_mutex_lock( &slap_counters.sc_sent_mutex );
-               ldap_pvt_mp_add_ulong( slap_counters.sc_bytes, (unsigned long)bytes );
-               ldap_pvt_mp_add_ulong( slap_counters.sc_entries, 1 );
-               ldap_pvt_mp_add_ulong( slap_counters.sc_pdu, 1 );
-               ldap_pvt_thread_mutex_unlock( &slap_counters.sc_sent_mutex );
+               ldap_pvt_thread_mutex_lock( &op->o_counters->sc_mutex );
+               ldap_pvt_mp_add_ulong( op->o_counters->sc_bytes, (unsigned long)bytes );
+               ldap_pvt_mp_add_ulong( op->o_counters->sc_entries, 1 );
+               ldap_pvt_mp_add_ulong( op->o_counters->sc_pdu, 1 );
+               ldap_pvt_thread_mutex_unlock( &op->o_counters->sc_mutex );
        }
 
-       Statslog( LDAP_DEBUG_STATS2, "%s ENTRY dn=\"%s\"\n",
-           op->o_log_prefix, edn, 0, 0, 0 );
-
        Debug( LDAP_DEBUG_TRACE,
                "<= send_search_entry: conn %lu exit.\n", op->o_connid, 0, 0 );
 
-       rc = 0;
+       rc = LDAP_SUCCESS;
 
 error_return:;
        if ( op->o_callback ) {
-               int             first = 1;
-               slap_callback   *sc = op->o_callback, *sc_next;
-
-               for ( sc_next = op->o_callback; sc_next; op->o_callback = sc_next) {
-                       sc_next = op->o_callback->sc_next;
-                       if ( op->o_callback->sc_cleanup ) {
-                               (void)op->o_callback->sc_cleanup( op, rs );
-                               if ( first && op->o_callback != sc ) {
-                                       sc = op->o_callback;
-                               }
-                       }
-                       first = 0;
-               }
-               op->o_callback = sc;
+               (void)slap_cleanup_play( op, rs );
        }
 
        if ( e_flags ) {
@@ -1286,78 +1373,60 @@ slap_send_search_reference( Operation *op, SlapReply *rs )
        BerElement      *ber = (BerElement *) &berbuf;
        int rc = 0;
        int bytes;
+       char *edn = rs->sr_entry ? rs->sr_entry->e_name.bv_val : "(null)";
 
        AttributeDescription *ad_ref = slap_schema.si_ad_ref;
        AttributeDescription *ad_entry = slap_schema.si_ad_entry;
 
        rs->sr_type = REP_SEARCHREF;
        if ( op->o_callback ) {
-               int             first = 1;
-               slap_callback   *sc = op->o_callback,
-                               *sc_next = op->o_callback;
-
-               rc = SLAP_CB_CONTINUE;
-               for ( sc_next = op->o_callback; sc_next; op->o_callback = sc_next) {
-                       sc_next = op->o_callback->sc_next;
-                       if ( op->o_callback->sc_response ) {
-                               rc = op->o_callback->sc_response( op, rs );
-                               if ( first && op->o_callback == NULL ) {
-                                       sc = NULL;
-                               }
-                               if ( rc != SLAP_CB_CONTINUE ) break;
-                       }
-                       first = 0;
+               rc = slap_response_play( op, rs );
+               if ( rc != SLAP_CB_CONTINUE ) {
+                       goto rel;
                }
-
-               op->o_callback = sc;
-               if ( rc != SLAP_CB_CONTINUE ) goto rel;
        }
 
        Debug( LDAP_DEBUG_TRACE,
                "=> send_search_reference: dn=\"%s\"\n",
-               rs->sr_entry ? rs->sr_entry->e_name.bv_val : "(null)", 0, 0 );
+               edn, 0, 0 );
 
-#ifdef notdef
-       rc = call_pre_referral_plugins( op, rs );
-       if ( rc < 0 )
-               goto rel;
-#endif /* LDAP_SLAPI */
-
-       if (  rs->sr_entry && ! access_allowed( op, rs->sr_entry,
-               ad_entry, NULL, ACL_READ, NULL ) )
+       if ( rs->sr_entry )
        {
-               Debug( LDAP_DEBUG_ACL,
-                       "send_search_reference: access to entry not allowed\n",
-                   0, 0, 0 );
-               rc = 1;
-               goto rel;
-       }
+               AclCheck ak = { rs->sr_entry, ad_entry, NULL, ACL_READ, NULL };
 
-       if ( rs->sr_entry && ! access_allowed( op, rs->sr_entry,
-               ad_ref, NULL, ACL_READ, NULL ) )
-       {
-               Debug( LDAP_DEBUG_ACL,
-                       "send_search_reference: access "
-                       "to reference not allowed\n",
-                   0, 0, 0 );
-               rc = 1;
-               goto rel;
+               if ( !access_allowed( op, &ak ))
+               {
+                       Debug( LDAP_DEBUG_ACL,
+                               "send_search_reference: access to entry not allowed\n",
+                               0, 0, 0 );
+                       rc = 1;
+                       goto rel;
+               }
+
+               ak.ak_desc = ad_ref;
+               if ( !access_allowed( op, &ak ))
+               {
+                       Debug( LDAP_DEBUG_ACL,
+                               "send_search_reference: access "
+                               "to reference not allowed\n",
+                               0, 0, 0 );
+                       rc = 1;
+                       goto rel;
+               }
        }
 
-#ifdef LDAP_CONTROL_X_DOMAIN_SCOPE
        if( op->o_domain_scope ) {
                Debug( LDAP_DEBUG_ANY,
                        "send_search_reference: domainScope control in (%s)\n", 
-                       rs->sr_entry->e_dn, 0, 0 );
+                       edn, 0, 0 );
                rc = 0;
                goto rel;
        }
-#endif
 
        if( rs->sr_ref == NULL ) {
                Debug( LDAP_DEBUG_ANY,
                        "send_search_reference: null ref in (%s)\n", 
-                       rs->sr_entry ? rs->sr_entry->e_dn : "(null)", 0, 0 );
+                       edn, 0, 0 );
                rc = 1;
                goto rel;
        }
@@ -1407,6 +1476,7 @@ slap_send_search_reference( Operation *op, SlapReply *rs )
 
        rc = 0;
        if ( rs->sr_flags & REP_ENTRY_MUSTRELEASE ) {
+               assert( rs->sr_entry != NULL );
                be_entry_release_rw( op, rs->sr_entry, 0 );
                rs->sr_flags ^= REP_ENTRY_MUSTRELEASE;
                rs->sr_entry = NULL;
@@ -1415,40 +1485,40 @@ slap_send_search_reference( Operation *op, SlapReply *rs )
 #ifdef LDAP_CONNECTIONLESS
        if (!op->o_conn || op->o_conn->c_is_udp == 0) {
 #endif
-       bytes = send_ldap_ber( op->o_conn, ber );
+       bytes = send_ldap_ber( op, ber );
        ber_free_buf( ber );
 
-       ldap_pvt_thread_mutex_lock( &slap_counters.sc_sent_mutex );
-       ldap_pvt_mp_add_ulong( slap_counters.sc_bytes, (unsigned long)bytes );
-       ldap_pvt_mp_add_ulong( slap_counters.sc_refs, 1 );
-       ldap_pvt_mp_add_ulong( slap_counters.sc_pdu, 1 );
-       ldap_pvt_thread_mutex_unlock( &slap_counters.sc_sent_mutex );
+       if ( bytes < 0 ) {
+               rc = LDAP_UNAVAILABLE;
+       } else {
+               ldap_pvt_thread_mutex_lock( &op->o_counters->sc_mutex );
+               ldap_pvt_mp_add_ulong( op->o_counters->sc_bytes, (unsigned long)bytes );
+               ldap_pvt_mp_add_ulong( op->o_counters->sc_refs, 1 );
+               ldap_pvt_mp_add_ulong( op->o_counters->sc_pdu, 1 );
+               ldap_pvt_thread_mutex_unlock( &op->o_counters->sc_mutex );
+       }
 #ifdef LDAP_CONNECTIONLESS
        }
 #endif
+       if ( rs->sr_ref != NULL ) {
+               int     r;
+
+               for ( r = 0; !BER_BVISNULL( &rs->sr_ref[ r ] ); r++ ) {
+                       Statslog( LDAP_DEBUG_STATS2, "%s REF #%d \"%s\"\n",
+                               op->o_log_prefix, r, rs->sr_ref[0].bv_val,
+                               0, 0 );
+               }
 
-       Statslog( LDAP_DEBUG_STATS2, "%s REF dn=\"%s\"\n",
-               op->o_log_prefix, rs->sr_entry ? rs->sr_entry->e_dn : "(null)",
-               0, 0, 0 );
+       } else {
+               Statslog( LDAP_DEBUG_STATS2, "%s REF \"(null)\"\n",
+                       op->o_log_prefix, 0, 0, 0, 0 );
+       }
 
        Debug( LDAP_DEBUG_TRACE, "<= send_search_reference\n", 0, 0, 0 );
 
 rel:
        if ( op->o_callback ) {
-               int             first = 1;
-               slap_callback   *sc = op->o_callback, *sc_next;
-
-               for ( sc_next = op->o_callback; sc_next; op->o_callback = sc_next) {
-                       sc_next = op->o_callback->sc_next;
-                       if ( op->o_callback->sc_cleanup ) {
-                               (void)op->o_callback->sc_cleanup( op, rs );
-                               if ( first && op->o_callback != sc ) {
-                                       sc = op->o_callback;
-                               }
-                       }
-                       first = 0;
-               }
-               op->o_callback = sc;
+               (void)slap_cleanup_play( op, rs );
        }
 
        return rc;
@@ -1486,9 +1556,43 @@ str2result(
                }
 
                if ( strncasecmp( s, "code", STRLENOF( "code" ) ) == 0 ) {
-                       if ( c != NULL ) {
-                               *code = atoi( c );
+                       char    *next = NULL;
+                       long    retcode;
+
+                       if ( c == NULL ) {
+                               Debug( LDAP_DEBUG_ANY, "str2result (%s) missing value\n",
+                                   s, 0, 0 );
+                               rc = -1;
+                               continue;
+                       }
+
+                       while ( isspace( (unsigned char) c[ 0 ] ) ) c++;
+                       if ( c[ 0 ] == '\0' ) {
+                               Debug( LDAP_DEBUG_ANY, "str2result (%s) missing or empty value\n",
+                                   s, 0, 0 );
+                               rc = -1;
+                               continue;
+                       }
+
+                       retcode = strtol( c, &next, 10 );
+                       if ( next == NULL || next == c ) {
+                               Debug( LDAP_DEBUG_ANY, "str2result (%s) unable to parse value\n",
+                                   s, 0, 0 );
+                               rc = -1;
+                               continue;
                        }
+
+                       while ( isspace( (unsigned char) next[ 0 ] ) ) next++;
+                       if ( next[ 0 ] != '\0' ) {
+                               Debug( LDAP_DEBUG_ANY, "str2result (%s) extra cruft after value\n",
+                                   s, 0, 0 );
+                               rc = -1;
+                               continue;
+                       }
+
+                       /* FIXME: what if it's larger that max int? */
+                       *code = (int)retcode;
+
                } else if ( strncasecmp( s, "matched", STRLENOF( "matched" ) ) == 0 ) {
                        if ( c != NULL ) {
                                *matched = c;
@@ -1522,30 +1626,33 @@ int slap_read_controls(
        LDAPControl c;
        Operation myop;
 
-       Debug( LDAP_DEBUG_ANY, "slap_read_controls: (%s) %s\n",
-               oid->bv_val, e->e_dn, 0 );
+       Debug( LDAP_DEBUG_ANY, "%s slap_read_controls: (%s) %s\n",
+               op->o_log_prefix, oid->bv_val, e->e_dn );
 
        rs->sr_entry = e;
        rs->sr_attrs = ( oid == &slap_pre_read_bv ) ?
                op->o_preread_attrs : op->o_postread_attrs; 
 
        bv.bv_len = entry_flatsize( rs->sr_entry, 0 );
-       bv.bv_val = op->o_tmpalloc(bv.bv_len, op->o_tmpmemctx );
+       bv.bv_val = op->o_tmpalloc( bv.bv_len, op->o_tmpmemctx );
 
        ber_init2( ber, &bv, LBER_USE_DER );
        ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
 
        /* create new operation */
        myop = *op;
-       myop.o_bd = NULL;
+       /* FIXME: o_bd needed for ACL */
+       myop.o_bd = op->o_bd;
        myop.o_res_ber = ber;
+       myop.o_callback = NULL;
+       myop.ors_slimit = 1;
 
        rc = slap_send_search_entry( &myop, rs );
        if( rc ) return rc;
 
        rc = ber_flatten2( ber, &c.ldctl_value, 0 );
 
-       if( rc == LBER_ERROR ) return LDAP_OTHER;
+       if( rc == -1 ) return LDAP_OTHER;
 
        c.ldctl_oid = oid->bv_val;
        c.ldctl_iscritical = 0;
@@ -1618,162 +1725,11 @@ slap_attr_flags( AttributeName *an )
                flags |= ( SLAP_OPATTRS_NO | SLAP_USERATTRS_YES );
 
        } else {
-               flags |= an_find( an, &AllOper )
+               flags |= an_find( an, slap_bv_all_operational_attrs )
                        ? SLAP_OPATTRS_YES : SLAP_OPATTRS_NO;
-               flags |= an_find( an, &AllUser )
+               flags |= an_find( an, slap_bv_all_user_attrs )
                        ? SLAP_USERATTRS_YES : SLAP_USERATTRS_NO;
        }
 
        return flags;
 }
-
-#ifdef LDAP_SLAPI
-static AttributeName *charray2anlist( Operation *op, char **attrs )
-{
-       AttributeName *an;
-       int i;
-
-       if ( attrs != NULL ) {
-               for ( i = 0; attrs[i] != NULL; i++ )
-                       ;
-               an = (AttributeName *)op->o_tmpalloc( (i + 1) * sizeof(AttributeName), op->o_tmpmemctx );
-               for ( i = 0; attrs[i] != NULL; i++ ) {
-                       const char *dummy;
-
-                       an[i].an_name.bv_val = attrs[i];
-                       an[i].an_name.bv_len = strlen( attrs[i] );
-                       an[i].an_oc = NULL;
-                       an[i].an_oc_exclude = 0;
-                       slap_bv2ad( &an[i].an_name, &an[i].an_desc, &dummy );
-               }
-       } else {
-               an = NULL;
-       }
-
-       return an;
-}
-
-/*
- * Call pre-response plugins. To avoid infinite recursion plugins
- * should just set SLAPI_RESULT_CODE rather than sending a
- * result if they wish to change the result. Similarly, pre-entry
- * plugins can either abort sending the entry or change the list
- * of sent attributes, but they can't call send_search_entry().
- */
-
-static int call_pre_entry_plugins( Operation *op, SlapReply *rs, int *pAttributesOnly )
-{
-       int rc;
-       char **attrs = NULL;
-       char **filteredAttributes = NULL;
-       Slapi_PBlock *pb;
-
-       if ( op->o_callback != NULL || op->o_pb == NULL ) {
-               return 0;
-       }
-
-       /*
-        * A new parameter block is allocated to avoid trampling on the
-        * operation SLAPI state.
-        */
-       pb = slapi_pblock_new();
-
-       slapi_int_pblock_set_operation( pb, op );
-       slapi_pblock_set( pb, SLAPI_RESCONTROLS, (void *)rs->sr_ctrls );
-       attrs = anlist2charray_x( op->ors_attrs, 0, op->o_tmpmemctx );
-       slapi_pblock_set( pb, SLAPI_SEARCH_ATTRS, (void *)attrs );
-       slapi_pblock_set( pb, SLAPI_SEARCH_ATTRSONLY, (void *)*pAttributesOnly );
-       slapi_pblock_set( pb, SLAPI_SEARCH_RESULT_ENTRY, (void *)rs->sr_entry );
-
-       rc = slapi_int_call_plugins( op->o_bd, SLAPI_PLUGIN_PRE_ENTRY_FN, pb );
-       if ( rc < 0 ) {
-               slapi_pblock_destroy( pb );
-               return rc;
-       }
-
-       slapi_pblock_get( pb, SLAPI_RESCONTROLS, (void **)&rs->sr_ctrls );
-       slapi_pblock_get( pb, SLAPI_SEARCH_ATTRS, (void **)&filteredAttributes );
-       slapi_pblock_get( pb, SLAPI_SEARCH_ATTRSONLY, (void **)pAttributesOnly );
-       slapi_pblock_get( pb, SLAPI_SEARCH_RESULT_ENTRY, (void **)&rs->sr_entry );
-
-       if ( filteredAttributes != attrs ) {
-               /*
-                * Support for filtering attributes; useful for implementing
-                * replication providers
-                */
-               rs->sr_attrs = charray2anlist( op, filteredAttributes );
-               slapi_ch_free( (void **)&filteredAttributes );
-       }
-
-       slapi_pblock_set( pb, SLAPI_RESCONTROLS, NULL );
-       slapi_pblock_destroy( pb );
-
-       return rc;
-}
-
-static int call_pre_result_plugins( Operation *op, SlapReply *rs )
-{
-       int rc;
-
-       if ( op->o_callback != NULL || op->o_pb == NULL ) {
-               return 0;
-       }
-
-#define pb op->o_pb
-
-       slapi_int_pblock_set_operation( pb, op );
-       slapi_pblock_set( pb, SLAPI_RESCONTROLS, (void *)rs->sr_ctrls );
-       slapi_pblock_set( pb, SLAPI_RESULT_CODE, (void *)rs->sr_err );
-       slapi_pblock_set( pb, SLAPI_RESULT_TEXT, (void *)rs->sr_text );
-       slapi_pblock_set( pb, SLAPI_RESULT_MATCHED, (void *)rs->sr_matched );
-
-       rc = slapi_int_call_plugins( op->o_bd, SLAPI_PLUGIN_PRE_RESULT_FN, pb );
-       if ( rc < 0 ) {
-               return rc;
-       }
-
-       slapi_pblock_get( pb, SLAPI_RESCONTROLS, (void **)&rs->sr_ctrls );
-       slapi_pblock_get( pb, SLAPI_RESULT_CODE, (void **)&rs->sr_err );
-       slapi_pblock_get( pb, SLAPI_RESULT_TEXT, (void **)&rs->sr_text );
-       slapi_pblock_get( pb, SLAPI_RESULT_MATCHED, (void **)&rs->sr_matched );
-
-       slapi_pblock_set( pb, SLAPI_RESCONTROLS, NULL );
-
-#undef pb
-
-       return rc;
-}
-
-static int call_pre_referral_plugins( Operation *op, SlapReply *rs )
-{
-       int rc;
-       Slapi_PBlock *pb;
-
-       if ( op->o_callback != NULL || op->o_pb == NULL ) {
-               return 0;
-       }
-
-       /*
-        * A new parameter block is allocated to avoid trampling on the
-        * operation SLAPI state.
-        */
-       pb = slapi_pblock_new();
-
-       slapi_int_pblock_set_operation( pb, op );
-       slapi_pblock_set( pb, SLAPI_RESCONTROLS, (void *)rs->sr_ctrls );
-       slapi_pblock_set( pb, SLAPI_SEARCH_RESULT_ENTRY, (void *)rs->sr_entry );
-
-       rc = slapi_int_call_plugins( op->o_bd, SLAPI_PLUGIN_PRE_REFERRAL_FN, pb );
-       if ( rc < 0 ) {
-               return rc;
-       }
-
-       slapi_pblock_get( pb, SLAPI_RESCONTROLS, (void **)&rs->sr_ctrls );
-       slapi_pblock_get( pb, SLAPI_SEARCH_RESULT_ENTRY, (void **)&rs->sr_entry );
-
-       slapi_pblock_set( pb, SLAPI_RESCONTROLS, NULL );
-       slapi_pblock_destroy( pb );
-
-       return rc;
-}
-#endif /* LDAP_SLAPI */