git.sur5r.net Git - openldap/blob - servers/slapd/cancel.c

   1 /* cancel.c - LDAP cancel extended operation */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 1998-2004 The OpenLDAP Foundation.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted only as authorized by the OpenLDAP
  10  * Public License.
  11  *
  12  * A copy of this license is available in the file LICENSE in the
  13  * top-level directory of the distribution or, alternatively, at
  14  * <http://www.OpenLDAP.org/license.html>.
  15  */
  16
  17 #include "portable.h"
  18
  19 #include <stdio.h>
  20
  21 #include <ac/krb.h>
  22 #include <ac/socket.h>
  23 #include <ac/string.h>
  24 #include <ac/unistd.h>
  25
  26 #include "slap.h"
  27
  28 #include <lber_pvt.h>
  29 #include <lutil.h>
  30
  31 int cancel_extop( Operation *op, SlapReply *rs )
  32 {
  33         Operation *o;
  34         int rc;
  35         int found = 0;
  36         int opid;
  37         BerElement *ber;
  38         int i;
  39
  40         assert( ber_bvcmp( &slap_EXOP_CANCEL, &op->ore_reqoid ) == 0 );
  41
  42         if ( op->ore_reqdata == NULL ) {
  43                 rs->sr_text = "no message ID supplied";
  44                 return LDAP_PROTOCOL_ERROR;
  45         }
  46
  47         ber = ber_init( op->ore_reqdata );
  48         if ( ber == NULL ) {
  49                 rs->sr_text = "internal error";
  50                 return LDAP_OTHER;
  51         }
  52
  53         if ( ber_scanf( ber, "{i}", &opid ) == LBER_ERROR ) {
  54                 rs->sr_text = "message ID parse failed";
  55                 return LDAP_PROTOCOL_ERROR;
  56         }
  57
  58         (void) ber_free( ber, 1 );
  59
  60         if ( opid < 0 ) {
  61                 rs->sr_text = "message ID invalid";
  62                 return LDAP_PROTOCOL_ERROR;
  63         }
  64
  65         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
  66         LDAP_STAILQ_FOREACH( o, &op->o_conn->c_pending_ops, o_next ) {
  67                 if ( o->o_msgid == opid ) {
  68                         LDAP_STAILQ_REMOVE( &op->o_conn->c_pending_ops, o, slap_op, o_next );
  69                         op->o_conn->c_n_ops_pending--;
  70                         slap_op_free( o );
  71                         found = 1;
  72                         break;
  73                 }
  74         }
  75         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
  76
  77         if ( found ) return LDAP_SUCCESS;
  78
  79         found = 0;
  80         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
  81         LDAP_STAILQ_FOREACH( o, &op->o_conn->c_ops, o_next ) {
  82                 if ( o->o_msgid == opid ) {
  83                         found = 1;
  84                         break;
  85                 }
  86         }
  87
  88         if ( !found ) {
  89                 for ( i = 0; i < nbackends; i++ ) {
  90                         op->o_bd = &backends[i];
  91                         if( !op->o_bd->be_cancel ) continue;
  92
  93                         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
  94
  95                         op->oq_cancel.rs_msgid = opid;
  96                         if ( op->o_bd->be_cancel( op, rs ) == LDAP_SUCCESS ) {
  97                                 return LDAP_SUCCESS;
  98                         }
  99                         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
 100                 }
 101                 ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
 102                 rs->sr_text = "message ID not found";
 103                 return LDAP_NO_SUCH_OPERATION;
 104         }
 105
 106         if ( op->o_cancel != SLAP_CANCEL_NONE ) {
 107                 ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
 108                 rs->sr_text = "message ID already being cancelled";
 109                 return LDAP_PROTOCOL_ERROR;
 110         }
 111
 112         op->o_cancel = SLAP_CANCEL_REQ;
 113         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
 114
 115         while ( op->o_cancel == SLAP_CANCEL_REQ ) {
 116                 ldap_pvt_thread_yield();
 117         }
 118
 119         if ( op->o_cancel == SLAP_CANCEL_ACK ) {
 120                 rc = LDAP_SUCCESS;
 121         } else {
 122                 rc = op->o_cancel;
 123         }
 124
 125         op->o_cancel = SLAP_CANCEL_DONE;
 126
 127         return rc;
 128 }