git.sur5r.net Git - openldap/blob - servers/slapd/back-bdb/operational.c

   1 /* operational.c - bdb backend operational attributes function */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 2000-2005 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/string.h>
  22 #include <ac/socket.h>
  23
  24 #include "slap.h"
  25 #include "back-bdb.h"
  26
  27 /*
  28  * sets *hasSubordinates to LDAP_COMPARE_TRUE/LDAP_COMPARE_FALSE
  29  * if the entry has children or not.
  30  */
  31 int
  32 bdb_hasSubordinates(
  33         Operation       *op,
  34         Entry           *e,
  35         int             *hasSubordinates )
  36 {
  37         int             rc;
  38
  39         assert( e );
  40
  41         /* NOTE: this should never happen, but it actually happens
  42          * when using back-relay; until we find a better way to
  43          * preserve entry's private information while rewriting it,
  44          * let's disable the hasSubordinate feature for back-relay.
  45          */
  46         if ( BEI( e ) == NULL ) {
  47                 return LDAP_OTHER;
  48         }
  49
  50 retry:
  51         /* FIXME: we can no longer assume the entry's e_private
  52          * field is correctly populated; so we need to reacquire
  53          * it with reader lock */
  54         rc = bdb_cache_children( op, NULL, e );
  55
  56         switch( rc ) {
  57         case DB_LOCK_DEADLOCK:
  58         case DB_LOCK_NOTGRANTED:
  59                 ldap_pvt_thread_yield();
  60                 goto retry;
  61
  62         case 0:
  63                 *hasSubordinates = LDAP_COMPARE_TRUE;
  64                 break;
  65
  66         case DB_NOTFOUND:
  67                 *hasSubordinates = LDAP_COMPARE_FALSE;
  68                 rc = LDAP_SUCCESS;
  69                 break;
  70
  71         default:
  72                 Debug(LDAP_DEBUG_ARGS,
  73                         "<=- " LDAP_XSTRING(bdb_hasSubordinates)
  74                         ": has_children failed: %s (%d)\n",
  75                         db_strerror(rc), rc, 0 );
  76                 rc = LDAP_OTHER;
  77         }
  78
  79         return rc;
  80 }
  81
  82 /*
  83  * sets the supported operational attributes (if required)
  84  */
  85 int
  86 bdb_operational(
  87         Operation       *op,
  88         SlapReply       *rs )
  89 {
  90         Attribute       **ap;
  91
  92         assert( rs->sr_entry );
  93
  94         for ( ap = &rs->sr_operational_attrs; *ap; ap = &(*ap)->a_next )
  95                 /* just count */ ;
  96
  97         if ( SLAP_OPATTRS( rs->sr_attr_flags ) ||
  98                         ad_inlist( slap_schema.si_ad_hasSubordinates, rs->sr_attrs ) )
  99         {
 100                 int     hasSubordinates, rc;
 101
 102                 rc = bdb_hasSubordinates( op, rs->sr_entry, &hasSubordinates );
 103                 if ( rc == LDAP_SUCCESS ) {
 104                         *ap = slap_operational_hasSubordinate( hasSubordinates == LDAP_COMPARE_TRUE );
 105                         assert( *ap );
 106
 107                         ap = &(*ap)->a_next;
 108                 }
 109         }
 110
 111         return LDAP_SUCCESS;
 112 }
 113