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

   1 /* $OpenLDAP$ */
   2 /* cancel.c - LDAP cancel extended operation */
   3 /*
   4  * Copyright 1998-2002 The OpenLDAP Foundation, All Rights Reserved.
   5  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   6  */
   7
   8 #include "portable.h"
   9
  10 #include <stdio.h>
  11
  12 #include <ac/krb.h>
  13 #include <ac/socket.h>
  14 #include <ac/string.h>
  15 #include <ac/unistd.h>
  16
  17 #include "slap.h"
  18
  19 #ifdef LDAP_EXOP_X_CANCEL
  20
  21 #include <lber_pvt.h>
  22 #include <lutil.h>
  23
  24 int cancel_extop( Operation *op, SlapReply *rs )
  25 {
  26         Operation *o;
  27         int rc;
  28         int found = 0;
  29         int opid;
  30         BerElement *ber;
  31         int i;
  32
  33         assert( ber_bvcmp( &slap_EXOP_CANCEL, &op->ore_reqoid ) == 0 );
  34
  35         if ( op->ore_reqdata == NULL ) {
  36                 rs->sr_text = "no message ID supplied";
  37                 return LDAP_PROTOCOL_ERROR;
  38         }
  39
  40         ber = ber_init( op->ore_reqdata );
  41         if ( ber == NULL ) {
  42                 rs->sr_text = "internal error";
  43                 return LDAP_OTHER;
  44         }
  45
  46         if ( ber_scanf( ber, "{i}", &opid ) == LBER_ERROR ) {
  47                 rs->sr_text = "message ID parse failed";
  48                 return LDAP_PROTOCOL_ERROR;
  49         }
  50
  51         (void) ber_free( ber, 1 );
  52
  53         if ( opid < 0 ) {
  54                 rs->sr_text = "message ID invalid";
  55                 return LDAP_PROTOCOL_ERROR;
  56         }
  57
  58         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
  59         LDAP_STAILQ_FOREACH( o, &op->o_conn->c_pending_ops, o_next ) {
  60                 if ( o->o_msgid == opid ) {
  61                         LDAP_STAILQ_REMOVE( &op->o_conn->c_pending_ops, o, slap_op, o_next );
  62                         slap_op_free( o );
  63                         found = 1;
  64                         break;
  65                 }
  66         }
  67         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
  68
  69         if ( found ) return LDAP_SUCCESS;
  70
  71         found = 0;
  72         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
  73         LDAP_STAILQ_FOREACH( o, &op->o_conn->c_ops, o_next ) {
  74                 if ( o->o_msgid == opid ) {
  75                         found = 1;
  76                         break;
  77                 }
  78         }
  79
  80         if ( !found ) {
  81                 for ( i = 0; i < nbackends; i++ ) {
  82                         op->o_bd = &backends[i];
  83                         if( !op->o_bd->be_cancel ) continue;
  84
  85                         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
  86
  87                         op->oq_cancel.rs_msgid = opid;
  88                         if ( op->o_bd->be_cancel( op, rs ) == LDAP_SUCCESS ) {
  89                                 return LDAP_SUCCESS;
  90                         }
  91                         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
  92                 }
  93                 ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
  94                 rs->sr_text = "message ID not found";
  95                 return LDAP_NO_SUCH_OPERATION;
  96         }
  97
  98         if ( op->o_cancel != SLAP_CANCEL_NONE ) {
  99                 ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
 100                 rs->sr_text = "message ID already being cancelled";
 101                 return LDAP_PROTOCOL_ERROR;
 102         }
 103
 104         op->o_cancel = SLAP_CANCEL_REQ;
 105         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
 106
 107         while ( op->o_cancel == SLAP_CANCEL_REQ ) {
 108                 ldap_pvt_thread_yield();
 109         }
 110
 111         if ( op->o_cancel == SLAP_CANCEL_ACK ) {
 112                 rc = LDAP_SUCCESS;
 113         } else {
 114                 rc = op->o_cancel;
 115         }
 116
 117         op->o_cancel = SLAP_CANCEL_DONE;
 118
 119         return rc;
 120 }
 121
 122 #endif /* LDAP_EXOP_X_CANCEL */