external/bsd/openldap/dist/servers/slapd/cancel.c

   1 /* cancel.c - LDAP cancel extended operation */
   2 /* $OpenLDAP: pkg/ldap/servers/slapd/cancel.c,v 1.23.2.4 2008/02/11 23:26:43 kurt Exp $ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 1998-2008 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/socket.h>
  22 #include <ac/string.h>
  23 #include <ac/unistd.h>
  24
  25 #include "slap.h"
  26
  27 #include <lber_pvt.h>
  28 #include <lutil.h>
  29
  30 const struct berval slap_EXOP_CANCEL = BER_BVC(LDAP_EXOP_CANCEL);
  31
  32 int cancel_extop( Operation *op, SlapReply *rs )
  33 {
  34         Operation *o;
  35         int rc;
  36         int opid;
  37         BerElement *ber;
  38
  39         assert( ber_bvcmp( &slap_EXOP_CANCEL, &op->ore_reqoid ) == 0 );
  40
  41         if ( op->ore_reqdata == NULL ) {
  42                 rs->sr_text = "no message ID supplied";
  43                 return LDAP_PROTOCOL_ERROR;
  44         }
  45
  46         ber = ber_init( op->ore_reqdata );
  47         if ( ber == NULL ) {
  48                 rs->sr_text = "internal error";
  49                 return LDAP_OTHER;
  50         }
  51
  52         if ( ber_scanf( ber, "{i}", &opid ) == LBER_ERROR ) {
  53                 rs->sr_text = "message ID parse failed";
  54                 return LDAP_PROTOCOL_ERROR;
  55         }
  56
  57         (void) ber_free( ber, 1 );
  58
  59         Statslog( LDAP_DEBUG_STATS, "%s CANCEL msg=%d\n",
  60                 op->o_log_prefix, opid, 0, 0, 0 );
  61
  62         if ( opid < 0 ) {
  63                 rs->sr_text = "message ID invalid";
  64                 return LDAP_PROTOCOL_ERROR;
  65         }
  66
  67         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
  68         LDAP_STAILQ_FOREACH( o, &op->o_conn->c_pending_ops, o_next ) {
  69                 if ( o->o_msgid == opid ) {
  70                         LDAP_STAILQ_REMOVE( &op->o_conn->c_pending_ops, o, Operation, o_next );
  71                         LDAP_STAILQ_NEXT(o, o_next) = NULL;
  72                         op->o_conn->c_n_ops_pending--;
  73                         slap_op_free( o, NULL );
  74                         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
  75                         return LDAP_SUCCESS;
  76                 }
  77         }
  78
  79         LDAP_STAILQ_FOREACH( o, &op->o_conn->c_ops, o_next ) {
  80                 if ( o->o_msgid == opid ) {
  81                         o->o_abandon = 1;
  82                         break;
  83                 }
  84         }
  85
  86         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
  87
  88         if ( o ) {
  89                 if ( o->o_cancel != SLAP_CANCEL_NONE ) {
  90                         rs->sr_text = "message ID already being cancelled";
  91                         return LDAP_PROTOCOL_ERROR;
  92                 }
  93
  94                 o->o_cancel = SLAP_CANCEL_REQ;
  95
  96                 LDAP_STAILQ_FOREACH( op->o_bd, &backendDB, be_next ) {
  97                         if( !op->o_bd->be_cancel ) continue;
  98
  99                         op->oq_cancel.rs_msgid = opid;
 100                         if ( op->o_bd->be_cancel( op, rs ) == LDAP_SUCCESS ) {
 101                                 return LDAP_SUCCESS;
 102                         }
 103                 }
 104
 105                 while ( o->o_cancel == SLAP_CANCEL_REQ ) {
 106                         ldap_pvt_thread_yield();
 107                 }
 108
 109                 if ( o->o_cancel == SLAP_CANCEL_ACK ) {
 110                         rc = LDAP_SUCCESS;
 111                 } else {
 112                         rc = o->o_cancel;
 113                 }
 114
 115                 o->o_cancel = SLAP_CANCEL_DONE;
 116         } else {
 117                 rs->sr_text = "message ID not found";
 118                 rc = LDAP_NO_SUCH_OPERATION;
 119         }
 120
 121         return rc;
 122 }