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 #include <lber_pvt.h>
  20 #include <lutil.h>
  21
  22 int cancel_extop(
  23         Connection *conn,
  24         Operation *op,
  25         const char *reqoid,
  26         struct berval *reqdata,
  27         char **rspoid,
  28         struct berval **rspdata,
  29         LDAPControl ***rspctrls,
  30         const char **text,
  31         BerVarray *refs )
  32 {
  33         Backend *be;
  34         int rc;
  35         int found = 0;
  36         int opid;
  37         BerElement *ber;
  38         int i;
  39
  40         assert( reqoid != NULL );
  41         assert( strcmp( LDAP_EXOP_X_CANCEL, reqoid ) == 0 );
  42
  43         if ( reqdata == NULL ) {
  44                 *text = "no message ID supplied";
  45                 return LDAP_PROTOCOL_ERROR;
  46         }
  47
  48         ber = ber_init( reqdata );
  49         if ( ber == NULL ) {
  50                 *text = "internal error";
  51                 return LDAP_OTHER;
  52         }
  53
  54         if ( ber_scanf( ber, "{i}", &opid ) == LBER_ERROR ) {
  55                 *text = "message ID parse failed";
  56                 return LDAP_PROTOCOL_ERROR;
  57         }
  58
  59         (void) ber_free( ber, 1 );
  60
  61         if ( opid < 0 ) {
  62                 *text = "message ID invalid";
  63                 return LDAP_PROTOCOL_ERROR;
  64         }
  65
  66         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
  67         LDAP_STAILQ_FOREACH( op, &conn->c_pending_ops, o_next ) {
  68                 if ( op->o_msgid == opid ) {
  69                         LDAP_STAILQ_REMOVE( &conn->c_pending_ops, op, slap_op, o_next );
  70                         slap_op_free( op );
  71                         found = 1;
  72                         break;
  73                 }
  74         }
  75         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
  76
  77         if ( found )
  78                 return LDAP_SUCCESS;
  79
  80         found = 0;
  81         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
  82         LDAP_STAILQ_FOREACH( op, &conn->c_ops, o_next ) {
  83                 if ( op->o_msgid == opid ) {
  84                         found = 1;
  85                         break;
  86                 }
  87         }
  88
  89         if ( !found ) {
  90 #ifdef LDAP_SYNC
  91                 for ( i = 0; i < nbackends; i++ ) {
  92                         if ( strncmp( backends[i].be_type, "bdb", 3 ) ) continue;
  93                         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
  94                         if ( bdb_cancel( &backends[i], conn, opid ) == LDAP_SUCCESS ) {
  95                                 return LDAP_SUCCESS;
  96                         } else {
  97                                 *text = "message ID not found";
  98                                 return LDAP_NO_SUCH_OPERATION;
  99                         }
 100                 }
 101 #else
 102                 *text = "message ID not found";
 103                 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
 104                 return LDAP_NO_SUCH_OPERATION;
 105 #endif
 106         }
 107
 108         if ( op->o_cancel != LDAP_CANCEL_NONE ) {
 109                 *text = "message ID already being cancelled";
 110                 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
 111                 return LDAP_PROTOCOL_ERROR;
 112         }
 113
 114         op->o_cancel = LDAP_CANCEL_REQ;
 115         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
 116
 117         while ( op->o_cancel == LDAP_CANCEL_REQ ) {
 118                 ldap_pvt_thread_yield();
 119         }
 120
 121         if ( op->o_cancel == LDAP_CANCEL_ACK ) {
 122                 rc = LDAP_SUCCESS;
 123         } else {
 124                 rc = op->o_cancel;
 125         }
 126
 127         op->o_cancel = LDAP_CANCEL_DONE;
 128
 129         return rc;
 130 }
 131