]> git.sur5r.net Git - openldap/blobdiff - servers/slapd/connection.c
fix ITS#3834
[openldap] / servers / slapd / connection.c
index 2cea2a8f56f7569a08ec35572dd3bde4e43b840b..036f7ae0e17f2eeaf8f0371bc9a5cedfeb61158e 100644 (file)
@@ -1,7 +1,7 @@
 /* $OpenLDAP$ */
 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
  *
- * Copyright 1998-2004 The OpenLDAP Foundation.
+ * Copyright 1998-2005 The OpenLDAP Foundation.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -26,7 +26,9 @@
 #include "portable.h"
 
 #include <stdio.h>
+#ifdef HAVE_LIMITS_H
 #include <limits.h>
+#endif
 
 #include <ac/socket.h>
 #include <ac/errno.h>
@@ -107,19 +109,19 @@ int connections_init(void)
        ldap_pvt_thread_mutex_init( &connections_mutex );
        ldap_pvt_thread_mutex_init( &conn_nextid_mutex );
 
-       connections = (Connection *) ch_calloc( SLAPD_GLOBAL(dtblsize), sizeof(Connection) );
+       connections = (Connection *) ch_calloc( dtblsize, sizeof(Connection) );
 
        if( connections == NULL ) {
                Debug( LDAP_DEBUG_ANY,
                        "connections_init: allocation (%d*%ld) of connection array failed\n",
-                       SLAPD_GLOBAL(dtblsize), (long) sizeof(Connection), 0 );
+                       dtblsize, (long) sizeof(Connection), 0 );
                return -1;
        }
 
        assert( connections[0].c_struct_state == SLAP_C_UNINITIALIZED );
-       assert( connections[SLAPD_GLOBAL(dtblsize)-1].c_struct_state == SLAP_C_UNINITIALIZED );
+       assert( connections[dtblsize-1].c_struct_state == SLAP_C_UNINITIALIZED );
 
-       for (i=0; i<SLAPD_GLOBAL(dtblsize); i++) connections[i].c_conn_idx = i;
+       for (i=0; i<dtblsize; i++) connections[i].c_conn_idx = i;
 
        /*
         * per entry initialization of the Connection array initialization
@@ -144,14 +146,14 @@ int connections_destroy(void)
                return -1;
        }
 
-       for ( i = 0; i < SLAPD_GLOBAL(dtblsize); i++ ) {
+       for ( i = 0; i < dtblsize; i++ ) {
                if( connections[i].c_struct_state != SLAP_C_UNINITIALIZED ) {
                        ber_sockbuf_free( connections[i].c_sb );
                        ldap_pvt_thread_mutex_destroy( &connections[i].c_mutex );
                        ldap_pvt_thread_mutex_destroy( &connections[i].c_write_mutex );
                        ldap_pvt_thread_cond_destroy( &connections[i].c_write_cv );
 #ifdef LDAP_SLAPI
-                       if ( SLAPD_GLOBAL(slapi_plugins_used) ) {
+                       if ( slapi_plugins_used ) {
                                slapi_int_free_object_extensions( SLAPI_X_EXT_CONNECTION, &connections[i] );
                        }
 #endif
@@ -175,13 +177,13 @@ int connections_shutdown(void)
 
        ldap_pvt_thread_mutex_lock( &connections_mutex );
 
-       for ( i = 0; i < SLAPD_GLOBAL(dtblsize); i++ ) {
+       for ( i = 0; i < dtblsize; i++ ) {
                if( connections[i].c_struct_state != SLAP_C_USED ) {
                        continue;
                }
                /* give persistent clients a chance to cleanup */
                if( connections[i].c_conn_state == SLAP_C_CLIENT ) {
-                       ldap_pvt_thread_pool_submit( &SLAPD_GLOBAL(connection_pool),
+                       ldap_pvt_thread_pool_submit( &connection_pool,
                        connections[i].c_clientfunc, connections[i].c_clientarg );
                        continue;
                }
@@ -218,7 +220,7 @@ int connections_timeout_idle(time_t now)
                if( c->c_n_ops_executing ||
                        c->c_conn_state == SLAP_C_CLIENT ) continue;
 
-               if( difftime( c->c_activitytime+SLAPD_GLOBAL(idletimeout), now) < 0 ) {
+               if( difftime( c->c_activitytime+global_idletimeout, now) < 0 ) {
                        /* close it */
                        connection_closing( c );
                        connection_close( c );
@@ -256,7 +258,7 @@ static Connection* connection_get( ber_socket_t s )
        {
                ber_socket_t i, sd;
 
-               for(i=0; i<SLAPD_GLOBAL(dtblsize); i++) {
+               for(i=0; i<dtblsize; i++) {
                        if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
                                assert( connections[i].c_conn_state == SLAP_C_INVALID );
                                assert( connections[i].c_sb == 0 );
@@ -315,7 +317,7 @@ static Connection* connection_get( ber_socket_t s )
                assert( sd != AC_SOCKET_INVALID );
 
 #ifndef SLAPD_MONITOR
-               if ( SLAPD_GLOBAL(idletimeout) > 0 )
+               if ( global_idletimeout > 0 )
 #endif /* ! SLAPD_MONITOR */
                {
                        c->c_activitytime = slap_get_time();
@@ -360,7 +362,7 @@ long connection_init(
 
        assert( s >= 0 );
 #ifndef HAVE_WINSOCK
-       assert( s < SLAPD_GLOBAL(dtblsize) );
+       assert( s < dtblsize );
 #endif
 
        ldap_pvt_thread_mutex_lock( &connections_mutex );
@@ -373,7 +375,7 @@ long connection_init(
                ber_socket_t i;
                c = NULL;
 
-               for( i=0; i < SLAPD_GLOBAL(dtblsize); i++) {
+               for( i=0; i < dtblsize; i++) {
                        ber_socket_t    sd;
 
                        if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
@@ -406,7 +408,7 @@ long connection_init(
                if( c == NULL ) {
                        Debug( LDAP_DEBUG_ANY,
                                "connection_init(%d): connection table full "
-                               "(%d/%d)\n", s, i, SLAPD_GLOBAL(dtblsize));
+                               "(%d/%d)\n", s, i, dtblsize);
                        ldap_pvt_thread_mutex_unlock( &connections_mutex );
                        return -1;
                }
@@ -445,7 +447,7 @@ long connection_init(
                c->c_sb = ber_sockbuf_alloc( );
 
                {
-                       ber_len_t max = SLAPD_GLOBAL(sockbuf_max_incoming);
+                       ber_len_t max = sockbuf_max_incoming;
                        ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
                }
 
@@ -457,7 +459,7 @@ long connection_init(
                ldap_pvt_thread_cond_init( &c->c_write_cv );
 
 #ifdef LDAP_SLAPI
-               if ( SLAPD_GLOBAL(slapi_plugins_used) ) {
+               if ( slapi_plugins_used ) {
                        slapi_int_create_object_extensions( SLAPI_X_EXT_CONNECTION, c );
                }
 #endif
@@ -513,7 +515,7 @@ long connection_init(
        c->c_protocol = 0;
 
 #ifndef SLAPD_MONITOR
-       if ( SLAPD_GLOBAL(idletimeout) > 0 )
+       if ( global_idletimeout > 0 )
 #endif /* ! SLAPD_MONITOR */
        {
                c->c_activitytime = c->c_starttime = slap_get_time();
@@ -592,7 +594,7 @@ void connection2anonymous( Connection *c )
        assert( c != NULL );
 
        {
-               ber_len_t max = SLAPD_GLOBAL(sockbuf_max_incoming);
+               ber_len_t max = sockbuf_max_incoming;
                ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
        }
 
@@ -609,6 +611,10 @@ void connection2anonymous( Connection *c )
                free(c->c_ndn.bv_val);
        }
        BER_BVZERO( &c->c_ndn );
+       if(c->c_sasl_authz_dn.bv_val != NULL) {
+               free(c->c_sasl_authz_dn.bv_val);
+       }
+       BER_BVZERO( &c->c_sasl_authz_dn );
 
        c->c_authz_backend = NULL;
 }
@@ -676,7 +682,7 @@ connection_destroy( Connection *c )
        c->c_sb = ber_sockbuf_alloc( );
 
        {
-               ber_len_t max = SLAPD_GLOBAL(sockbuf_max_incoming);
+               ber_len_t max = sockbuf_max_incoming;
                ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
        }
 
@@ -685,7 +691,7 @@ connection_destroy( Connection *c )
 
 #ifdef LDAP_SLAPI
        /* call destructors, then constructors; avoids unnecessary allocation */
-       if ( SLAPD_GLOBAL(slapi_plugins_used) ) {
+       if ( slapi_plugins_used ) {
                slapi_int_clear_object_extensions( SLAPI_X_EXT_CONNECTION, c );
        }
 #endif
@@ -710,10 +716,20 @@ static void connection_abandon( Connection *c )
 {
        /* c_mutex must be locked by caller */
 
-       Operation *o;
-
-       LDAP_STAILQ_FOREACH(o, &c->c_ops, o_next) {
+       Operation *o, *next, op = {0};
+       Opheader ohdr = {0};
+       SlapReply rs = {0};
+
+       op.o_hdr = &ohdr;
+       op.o_conn = c;
+       op.o_connid = c->c_connid;
+       op.o_tag = LDAP_REQ_ABANDON;
+       for ( o = LDAP_STAILQ_FIRST( &c->c_ops ); o; o=next ) {
+               next = LDAP_STAILQ_NEXT( o, o_next );
+               op.orn_msgid = o->o_msgid;
                o->o_abandon = 1;
+               op.o_bd = frontendDB;
+               frontendDB->be_abandon( &op, &rs );
        }
 
        /* remove pending operations */
@@ -751,7 +767,12 @@ void connection_closing( Connection *c )
 
                /* wake write blocked operations */
                slapd_clr_write( sd, 1 );
-               ldap_pvt_thread_cond_signal( &c->c_write_cv );
+               if ( c->c_writewaiter ) {
+                       ldap_pvt_thread_cond_signal( &c->c_write_cv );
+                       ldap_pvt_thread_mutex_unlock( &c->c_mutex );
+                       ldap_pvt_thread_yield();
+                       ldap_pvt_thread_mutex_lock( &c->c_mutex );
+               }
        }
 }
 
@@ -809,7 +830,7 @@ Connection* connection_next( Connection *c, ber_socket_t *index )
 {
        assert( connections != NULL );
        assert( index != NULL );
-       assert( *index <= SLAPD_GLOBAL(dtblsize) );
+       assert( *index <= dtblsize );
 
        if( c != NULL ) {
                ldap_pvt_thread_mutex_unlock( &c->c_mutex );
@@ -817,7 +838,7 @@ Connection* connection_next( Connection *c, ber_socket_t *index )
 
        c = NULL;
 
-       for(; *index < SLAPD_GLOBAL(dtblsize); (*index)++) {
+       for(; *index < dtblsize; (*index)++) {
                if( connections[*index].c_struct_state == SLAP_C_UNINITIALIZED ) {
                        assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 #ifndef HAVE_WINSOCK
@@ -865,22 +886,44 @@ void connection_done( Connection *c )
 /* FIXME: returns 0 in case of failure */
 #define INCR_OP_INITIATED(index) \
        do { \
-               ldap_pvt_thread_mutex_lock( &SLAPD_GLOBAL(counters).sc_ops_mutex ); \
-               ldap_pvt_mp_add_ulong(SLAPD_GLOBAL(counters).sc_ops_initiated_[(index)], 1); \
-               ldap_pvt_thread_mutex_unlock( &SLAPD_GLOBAL(counters).sc_ops_mutex ); \
+               ldap_pvt_thread_mutex_lock( &slap_counters.sc_ops_mutex ); \
+               ldap_pvt_mp_add_ulong(slap_counters.sc_ops_initiated_[(index)], 1); \
+               ldap_pvt_thread_mutex_unlock( &slap_counters.sc_ops_mutex ); \
        } while (0)
 #define INCR_OP_COMPLETED(index) \
        do { \
-               ldap_pvt_thread_mutex_lock( &SLAPD_GLOBAL(counters).sc_ops_mutex ); \
-               ldap_pvt_mp_add_ulong(SLAPD_GLOBAL(counters).sc_ops_completed, 1); \
-               ldap_pvt_mp_add_ulong(SLAPD_GLOBAL(counters).sc_ops_completed_[(index)], 1); \
-               ldap_pvt_thread_mutex_unlock( &SLAPD_GLOBAL(counters).sc_ops_mutex ); \
+               ldap_pvt_thread_mutex_lock( &slap_counters.sc_ops_mutex ); \
+               ldap_pvt_mp_add_ulong(slap_counters.sc_ops_completed, 1); \
+               ldap_pvt_mp_add_ulong(slap_counters.sc_ops_completed_[(index)], 1); \
+               ldap_pvt_thread_mutex_unlock( &slap_counters.sc_ops_mutex ); \
        } while (0)
 #else /* !SLAPD_MONITOR */
 #define INCR_OP_INITIATED(index) 
-#define INCR_OP_COMPLETED(index) 
+#define INCR_OP_COMPLETED(index) \
+       do { \
+               ldap_pvt_thread_mutex_lock( &slap_counters.sc_ops_mutex ); \
+               ldap_pvt_mp_add_ulong(slap_counters.sc_ops_completed, 1); \
+               ldap_pvt_thread_mutex_unlock( &slap_counters.sc_ops_mutex ); \
+       } while (0)
 #endif /* !SLAPD_MONITOR */
 
+/*
+ * NOTE: keep in sync with enum in slapd.h
+ */
+static int (*opfun[])( Operation *op, SlapReply *rs ) = {
+       do_bind,
+       do_unbind,
+       do_add,
+       do_delete,
+       do_modrdn,
+       do_modify,
+       do_compare,
+       do_search,
+       do_abandon,
+       do_extended,
+       NULL
+};
+
 static void *
 connection_operation( void *ctx, void *arg_v )
 {
@@ -888,18 +931,16 @@ connection_operation( void *ctx, void *arg_v )
        Operation *op = arg_v;
        SlapReply rs = {REP_RESULT};
        ber_tag_t tag = op->o_tag;
-#ifdef SLAPD_MONITOR
-       ber_tag_t oldtag = tag;
-#endif /* SLAPD_MONITOR */
+       int opidx = -1;
        Connection *conn = op->o_conn;
        void *memctx = NULL;
        void *memctx_null = NULL;
        ber_len_t memsiz;
 
-       ldap_pvt_thread_mutex_lock( &SLAPD_GLOBAL(counters).sc_ops_mutex );
+       ldap_pvt_thread_mutex_lock( &slap_counters.sc_ops_mutex );
        /* FIXME: returns 0 in case of failure */
-       ldap_pvt_mp_add_ulong(SLAPD_GLOBAL(counters).sc_ops_initiated, 1);
-       ldap_pvt_thread_mutex_unlock( &SLAPD_GLOBAL(counters).sc_ops_mutex );
+       ldap_pvt_mp_add_ulong(slap_counters.sc_ops_initiated, 1);
+       ldap_pvt_thread_mutex_unlock( &slap_counters.sc_ops_mutex );
 
        op->o_threadctx = ctx;
 
@@ -908,7 +949,7 @@ connection_operation( void *ctx, void *arg_v )
        case LDAP_REQ_UNBIND:
        case LDAP_REQ_ADD:
        case LDAP_REQ_DELETE:
-       case LDAP_REQ_MODRDN:
+       case LDAP_REQ_MODDN:
        case LDAP_REQ_MODIFY:
        case LDAP_REQ_COMPARE:
        case LDAP_REQ_SEARCH:
@@ -946,7 +987,7 @@ connection_operation( void *ctx, void *arg_v )
 #endif
        memsiz = SLAP_SLAB_SIZE;
 
-       memctx = slap_sl_mem_create( memsiz, ctx );
+       memctx = slap_sl_mem_create( memsiz, SLAP_SLAB_STACK, ctx );
        op->o_tmpmemctx = memctx;
        op->o_tmpmfuncs = &slap_sl_mfuncs;
        if ( tag != LDAP_REQ_ADD && tag != LDAP_REQ_MODIFY ) {
@@ -959,53 +1000,43 @@ connection_operation( void *ctx, void *arg_v )
 
        switch ( tag ) {
        case LDAP_REQ_BIND:
-               INCR_OP_INITIATED(SLAP_OP_BIND);
-               rc = do_bind( op, &rs );
+               opidx = SLAP_OP_BIND;
                break;
 
        case LDAP_REQ_UNBIND:
-               INCR_OP_INITIATED(SLAP_OP_UNBIND);
-               rc = do_unbind( op, &rs );
+               opidx = SLAP_OP_UNBIND;
                break;
 
        case LDAP_REQ_ADD:
-               INCR_OP_INITIATED(SLAP_OP_ADD);
-               rc = do_add( op, &rs );
+               opidx = SLAP_OP_ADD;
                break;
 
        case LDAP_REQ_DELETE:
-               INCR_OP_INITIATED(SLAP_OP_DELETE);
-               rc = do_delete( op, &rs );
+               opidx = SLAP_OP_DELETE;
                break;
 
        case LDAP_REQ_MODRDN:
-               INCR_OP_INITIATED(SLAP_OP_MODRDN);
-               rc = do_modrdn( op, &rs );
+               opidx = SLAP_OP_MODRDN;
                break;
 
        case LDAP_REQ_MODIFY:
-               INCR_OP_INITIATED(SLAP_OP_MODIFY);
-               rc = do_modify( op, &rs );
+               opidx = SLAP_OP_MODIFY;
                break;
 
        case LDAP_REQ_COMPARE:
-               INCR_OP_INITIATED(SLAP_OP_COMPARE);
-               rc = do_compare( op, &rs );
+               opidx = SLAP_OP_COMPARE;
                break;
 
        case LDAP_REQ_SEARCH:
-               INCR_OP_INITIATED(SLAP_OP_SEARCH);
-               rc = do_search( op, &rs );
+               opidx = SLAP_OP_SEARCH;
                break;
 
        case LDAP_REQ_ABANDON:
-               INCR_OP_INITIATED(SLAP_OP_ABANDON);
-               rc = do_abandon( op, &rs );
+               opidx = SLAP_OP_ABANDON;
                break;
 
        case LDAP_REQ_EXTENDED:
-               INCR_OP_INITIATED(SLAP_OP_EXTENDED);
-               rc = do_extended( op, &rs );
+               opidx = SLAP_OP_EXTENDED;
                break;
 
        default:
@@ -1013,50 +1044,26 @@ connection_operation( void *ctx, void *arg_v )
                assert( 0 );
        }
 
+       assert( opidx > -1 );
+       INCR_OP_INITIATED( opidx );
+       rc = (*(opfun[opidx]))( op, &rs );
+
 operations_error:
-       if( rc == SLAPD_DISCONNECT ) tag = LBER_ERROR;
+       if ( rc == SLAPD_DISCONNECT ) {
+               tag = LBER_ERROR;
 
-#ifdef SLAPD_MONITOR
-       switch (oldtag) {
-       case LDAP_REQ_BIND:
-               INCR_OP_COMPLETED(SLAP_OP_BIND);
-               break;
-       case LDAP_REQ_UNBIND:
-               INCR_OP_COMPLETED(SLAP_OP_UNBIND);
-               break;
-       case LDAP_REQ_ADD:
-               INCR_OP_COMPLETED(SLAP_OP_ADD);
-               break;
-       case LDAP_REQ_DELETE:
-               INCR_OP_COMPLETED(SLAP_OP_DELETE);
-               break;
-       case LDAP_REQ_MODRDN:
-               INCR_OP_COMPLETED(SLAP_OP_MODRDN);
-               break;
-       case LDAP_REQ_MODIFY:
-               INCR_OP_COMPLETED(SLAP_OP_MODIFY);
-               break;
-       case LDAP_REQ_COMPARE:
-               INCR_OP_COMPLETED(SLAP_OP_COMPARE);
-               break;
-       case LDAP_REQ_SEARCH:
-               INCR_OP_COMPLETED(SLAP_OP_SEARCH);
-               break;
-       case LDAP_REQ_ABANDON:
-               INCR_OP_COMPLETED(SLAP_OP_ABANDON);
-               break;
-       case LDAP_REQ_EXTENDED:
-               INCR_OP_COMPLETED(SLAP_OP_EXTENDED);
-               break;
-       default:
-               /* not reachable */
-               assert( 0 );
+       } else if ( opidx > -1 ) {
+               /* increment completed operations count 
+                * only if operation was initiated
+                * and rc != SLAPD_DISCONNECT */
+               INCR_OP_COMPLETED( opidx );
        }
-#endif /* SLAPD_MONITOR */
-       ldap_pvt_thread_mutex_unlock( &SLAPD_GLOBAL(counters).sc_ops_mutex );
 
        if ( op->o_cancel == SLAP_CANCEL_REQ ) {
-               op->o_cancel = LDAP_TOO_LATE;
+               if ( rc == SLAPD_ABANDON )
+                       op->o_cancel = SLAP_CANCEL_ACK;
+               else
+                       op->o_cancel = LDAP_TOO_LATE;
        }
        while ( op->o_cancel != SLAP_CANCEL_NONE &&
                op->o_cancel != SLAP_CANCEL_DONE )
@@ -1068,25 +1075,11 @@ operations_error:
 
        ber_set_option( op->o_ber, LBER_OPT_BER_MEMCTX, &memctx_null );
 
-       if ( op->o_cancel != SLAP_CANCEL_ACK &&
-               ( op->o_sync_mode & SLAP_SYNC_PERSIST ) )
-       {
-               slap_sl_mem_detach( ctx, memctx );
-
-       } else if ( op->o_sync_slog_size != -1 ) {
-               slap_sl_mem_detach( ctx, memctx );
-               LDAP_STAILQ_REMOVE( &conn->c_ops, op, slap_op, o_next);
-               LDAP_STAILQ_NEXT(op, o_next) = NULL;
-               conn->c_n_ops_executing--;
-               conn->c_n_ops_completed++;
-
-       } else {
-               LDAP_STAILQ_REMOVE( &conn->c_ops, op, slap_op, o_next);
-               LDAP_STAILQ_NEXT(op, o_next) = NULL;
-               slap_op_free( op );
-               conn->c_n_ops_executing--;
-               conn->c_n_ops_completed++;
-       }
+       LDAP_STAILQ_REMOVE( &conn->c_ops, op, slap_op, o_next);
+       LDAP_STAILQ_NEXT(op, o_next) = NULL;
+       slap_op_free( op );
+       conn->c_n_ops_executing--;
+       conn->c_n_ops_completed++;
 
        switch( tag ) {
        case LBER_ERROR:
@@ -1190,7 +1183,7 @@ int connection_read(ber_socket_t s)
 
        if ( c->c_conn_state == SLAP_C_CLIENT ) {
                slapd_clr_read( s, 0 );
-               ldap_pvt_thread_pool_submit( &SLAPD_GLOBAL(connection_pool),
+               ldap_pvt_thread_pool_submit( &connection_pool,
                        c->c_clientfunc, c->c_clientarg );
                connection_return( c );
                ldap_pvt_thread_mutex_unlock( &connections_mutex );
@@ -1203,7 +1196,7 @@ int connection_read(ber_socket_t s)
 
 #ifdef HAVE_TLS
        if ( c->c_is_tls && c->c_needs_tls_accept ) {
-               rc = ldap_pvt_tls_accept( c->c_sb, SLAPD_GLOBAL(tls_ctx) );
+               rc = ldap_pvt_tls_accept( c->c_sb, slap_tls_ctx );
                if ( rc < 0 ) {
 #if 0 /* required by next #if 0 */
                        struct timeval tv;
@@ -1431,22 +1424,17 @@ connection_input(
        }
 #endif
        if(tag == LDAP_REQ_BIND) {
-               /* immediately abandon all exiting operations upon BIND */
+               /* immediately abandon all existing operations upon BIND */
                connection_abandon( conn );
        }
 
        op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++ );
 
        op->o_conn = conn;
-       op->o_assertion = NULL;
-       op->o_preread_attrs = NULL;
-       op->o_postread_attrs = NULL;
-       op->o_vrFilter = NULL;
        /* clear state if the connection is being reused from inactive */
        if ( conn->c_conn_state == SLAP_C_INACTIVE ) {
                memset( &conn->c_pagedresults_state, 0, sizeof( conn->c_pagedresults_state ) );
        }
-       op->o_pagedresults_state = conn->c_pagedresults_state;
 
        op->o_res_ber = NULL;
 
@@ -1486,22 +1474,38 @@ connection_input(
         * already pending ops, let them go first.  Abandon operations
         * get exceptions to some, but not all, cases.
         */
-       if (tag != LDAP_REQ_ABANDON && conn->c_conn_state == SLAP_C_CLOSING) {
-               defer = "closing";
-       } else if (tag != LDAP_REQ_ABANDON && conn->c_writewaiter) {
-               defer = "awaiting write";
-       } else if (conn->c_n_ops_executing >= SLAPD_GLOBAL(connection_pool_max)/2) {
-               defer = "too many executing";
-       } else if (conn->c_conn_state == SLAP_C_BINDING) {
-               defer = "binding";
-       } else if (tag != LDAP_REQ_ABANDON && conn->c_n_ops_pending) {
-               defer = "pending operations";
+       switch( tag ){
+       default:
+               /* Abandon and Unbind are exempt from these checks */
+               if (conn->c_conn_state == SLAP_C_CLOSING) {
+                       defer = "closing";
+                       break;
+               } else if (conn->c_writewaiter) {
+                       defer = "awaiting write";
+                       break;
+               } else if (conn->c_n_ops_pending) {
+                       defer = "pending operations";
+                       break;
+               }
+               /* FALLTHRU */
+       case LDAP_REQ_ABANDON:
+               /* Unbind is exempt from these checks */
+               if (conn->c_n_ops_executing >= connection_pool_max/2) {
+                       defer = "too many executing";
+                       break;
+               } else if (conn->c_conn_state == SLAP_C_BINDING) {
+                       defer = "binding";
+                       break;
+               }
+               /* FALLTHRU */
+       case LDAP_REQ_UNBIND:
+               break;
        }
 
        if( defer ) {
                int max = conn->c_dn.bv_len
-                       ? SLAPD_GLOBAL(conn_max_pending_auth)
-                       : SLAPD_GLOBAL(conn_max_pending);
+                       ? slap_conn_max_pending_auth
+                       : slap_conn_max_pending;
 
                Debug( LDAP_DEBUG_ANY,
                        "connection_input: conn=%lu deferring operation: %s\n",
@@ -1539,7 +1543,7 @@ connection_resched( Connection *conn )
                ber_socket_t    sd;
                ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
 
-               /* us trylock to avoid possible deadlock */
+               /* use trylock to avoid possible deadlock */
                rc = ldap_pvt_thread_mutex_trylock( &connections_mutex );
 
                if( rc ) {
@@ -1577,7 +1581,7 @@ connection_resched( Connection *conn )
        }
 
        while ((op = LDAP_STAILQ_FIRST( &conn->c_pending_ops )) != NULL) {
-               if ( conn->c_n_ops_executing > SLAPD_GLOBAL(connection_pool_max)/2 ) {
+               if ( conn->c_n_ops_executing > connection_pool_max/2 ) {
                        break;
                }
                LDAP_STAILQ_REMOVE_HEAD( &conn->c_pending_ops, o_next );
@@ -1621,8 +1625,13 @@ static int connection_op_activate( Operation *op )
 
        if (!op->o_dn.bv_len) {
                op->o_authz = op->o_conn->c_authz;
-               ber_dupbv( &op->o_dn, &op->o_conn->c_dn );
-               ber_dupbv( &op->o_ndn, &op->o_conn->c_ndn );
+               if ( BER_BVISNULL( &op->o_conn->c_sasl_authz_dn )) {
+                       ber_dupbv( &op->o_dn, &op->o_conn->c_dn );
+                       ber_dupbv( &op->o_ndn, &op->o_conn->c_ndn );
+               } else {
+                       ber_dupbv( &op->o_dn, &op->o_conn->c_sasl_authz_dn );
+                       ber_dupbv( &op->o_ndn, &op->o_conn->c_sasl_authz_dn );
+               }
        }
        op->o_authtype = op->o_conn->c_authtype;
        ber_dupbv( &op->o_authmech, &op->o_conn->c_authmech );
@@ -1642,7 +1651,7 @@ static int connection_op_activate( Operation *op )
 
        LDAP_STAILQ_INSERT_TAIL( &op->o_conn->c_ops, op, o_next );
 
-       status = ldap_pvt_thread_pool_submit( &SLAPD_GLOBAL(connection_pool),
+       status = ldap_pvt_thread_pool_submit( &connection_pool,
                connection_operation, (void *) op );
 
        if ( status != 0 ) {
@@ -1658,6 +1667,7 @@ static int connection_op_activate( Operation *op )
 int connection_write(ber_socket_t s)
 {
        Connection *c;
+       Operation *op;
 
        assert( connections != NULL );
 
@@ -1665,8 +1675,6 @@ int connection_write(ber_socket_t s)
 
        c = connection_get( s );
 
-       slapd_clr_write( s, 0);
-
        if( c == NULL ) {
                Debug( LDAP_DEBUG_ANY,
                        "connection_write(%ld): no connection!\n",
@@ -1676,6 +1684,8 @@ int connection_write(ber_socket_t s)
                return -1;
        }
 
+       slapd_clr_write( s, 0);
+
        c->c_n_write++;
 
        Debug( LDAP_DEBUG_TRACE,
@@ -1689,6 +1699,26 @@ int connection_write(ber_socket_t s)
        if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
                slapd_set_write( s, 1 );
        }
+       /* If there are ops pending because of a writewaiter, start
+        * one up.
+        */
+       while ((op = LDAP_STAILQ_FIRST( &c->c_pending_ops )) != NULL) {
+               if ( !c->c_writewaiter ) break;
+               if ( c->c_n_ops_executing > connection_pool_max/2 ) {
+                       break;
+               }
+               LDAP_STAILQ_REMOVE_HEAD( &c->c_pending_ops, o_next );
+               LDAP_STAILQ_NEXT(op, o_next) = NULL;
+               /* pending operations should not be marked for abandonment */
+               assert(!op->o_abandon);
+
+               c->c_n_ops_pending--;
+               c->c_n_ops_executing++;
+
+               connection_op_activate( op );
+
+               break;
+       }
        connection_return( c );
        ldap_pvt_thread_mutex_unlock( &connections_mutex );
        return 0;
@@ -1708,8 +1738,11 @@ connection_fake_init(
        conn->c_peer_domain = slap_empty_bv;
        conn->c_peer_name = slap_empty_bv;
 
+       memset(op, 0, OPERATION_BUFFER_SIZE);
+       op->o_hdr = (Opheader *)(op+1);
+       op->o_controls = (void **)(op->o_hdr+1);
        /* set memory context */
-       op->o_tmpmemctx = slap_sl_mem_create( SLAP_SLAB_SIZE, ctx );
+       op->o_tmpmemctx = slap_sl_mem_create(SLAP_SLAB_SIZE, SLAP_SLAB_STACK, ctx);
        op->o_tmpmfuncs = &slap_sl_mfuncs;
        op->o_threadctx = ctx;