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 1998-2005 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 opid;
  36         BerElement *ber;
  37
  38         assert( ber_bvcmp( &slap_EXOP_CANCEL, &op->ore_reqoid ) == 0 );
  39
  40         if ( op->ore_reqdata == NULL ) {
  41                 rs->sr_text = "no message ID supplied";
  42                 return LDAP_PROTOCOL_ERROR;
  43         }
  44
  45         ber = ber_init( op->ore_reqdata );
  46         if ( ber == NULL ) {
  47                 rs->sr_text = "internal error";
  48                 return LDAP_OTHER;
  49         }
  50
  51         if ( ber_scanf( ber, "{i}", &opid ) == LBER_ERROR ) {
  52                 rs->sr_text = "message ID parse failed";
  53                 return LDAP_PROTOCOL_ERROR;
  54         }
  55
  56         (void) ber_free( ber, 1 );
  57
  58         if ( opid < 0 ) {
  59                 rs->sr_text = "message ID invalid";
  60                 return LDAP_PROTOCOL_ERROR;
  61         }
  62
  63         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
  64         LDAP_STAILQ_FOREACH( o, &op->o_conn->c_pending_ops, o_next ) {
  65                 if ( o->o_msgid == opid ) {
  66                         LDAP_STAILQ_REMOVE( &op->o_conn->c_pending_ops, o, slap_op, o_next );
  67                         LDAP_STAILQ_NEXT(o, o_next) = NULL;
  68                         op->o_conn->c_n_ops_pending--;
  69                         slap_op_free( o );
  70                         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
  71                         return LDAP_SUCCESS;
  72                 }
  73         }
  74
  75         LDAP_STAILQ_FOREACH( o, &op->o_conn->c_ops, o_next ) {
  76                 if ( o->o_msgid == opid ) {
  77                         o->o_abandon = 1;
  78                         break;
  79                 }
  80         }
  81
  82         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
  83
  84         if ( o ) {
  85                 if ( o->o_cancel != SLAP_CANCEL_NONE ) {
  86                         rs->sr_text = "message ID already being cancelled";
  87                         return LDAP_PROTOCOL_ERROR;
  88                 }
  89
  90                 o->o_cancel = SLAP_CANCEL_REQ;
  91
  92                 LDAP_STAILQ_FOREACH( op->o_bd, &backendDB, be_next ) {
  93                         if( !op->o_bd->be_cancel ) continue;
  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                 }
 100
 101                 while ( o->o_cancel == SLAP_CANCEL_REQ ) {
 102                         ldap_pvt_thread_yield();
 103                 }
 104
 105                 if ( o->o_cancel == SLAP_CANCEL_ACK ) {
 106                         rc = LDAP_SUCCESS;
 107                 } else {
 108                         rc = o->o_cancel;
 109                 }
 110
 111                 o->o_cancel = SLAP_CANCEL_DONE;
 112         } else {
 113                 rs->sr_text = "message ID not found";
 114                 rc = LDAP_NO_SUCH_OPERATION;
 115         }
 116
 117         return rc;
 118 }