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 2000-2004 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 #include "external.h"
  27
  28 /*
  29  * sets *hasSubordinates to LDAP_COMPARE_TRUE/LDAP_COMPARE_FALSE
  30  * if the entry has children or not.
  31  */
  32 int
  33 bdb_hasSubordinates(
  34         Operation       *op,
  35         Entry           *e,
  36         int             *hasSubordinates )
  37 {
  38         int             rc;
  39
  40         assert( e );
  41
  42         /* NOTE: this should never happen, but it actually happens
  43          * when using back-relay; until we find a better way to
  44          * preserve entry's private information while rewriting it,
  45          * let's disable the hasSubordinate feature for back-relay.
  46          */
  47         if ( BEI( e ) == NULL ) {
  48                 return LDAP_OTHER;
  49         }
  50
  51 retry:
  52         /* FIXME: we can no longer assume the entry's e_private
  53          * field is correctly populated; so we need to reacquire
  54          * it with reader lock */
  55         rc = bdb_cache_children( op, NULL, e );
  56
  57         switch( rc ) {
  58         case DB_LOCK_DEADLOCK:
  59         case DB_LOCK_NOTGRANTED:
  60                 ldap_pvt_thread_yield();
  61                 goto retry;
  62
  63         case 0:
  64                 *hasSubordinates = LDAP_COMPARE_TRUE;
  65                 break;
  66
  67         case DB_NOTFOUND:
  68                 *hasSubordinates = LDAP_COMPARE_FALSE;
  69                 rc = LDAP_SUCCESS;
  70                 break;
  71
  72         default:
  73 #ifdef NEW_LOGGING
  74                 LDAP_LOG ( OPERATION, ERR,
  75                         "=> bdb_hasSubordinates: has_children failed: %s (%d)\n",
  76                         db_strerror(rc), rc, 0 );
  77 #else
  78                 Debug(LDAP_DEBUG_ARGS,
  79                         "<=- bdb_hasSubordinates: has_children failed: %s (%d)\n",
  80                         db_strerror(rc), rc, 0 );
  81 #endif
  82                 rc = LDAP_OTHER;
  83         }
  84
  85         return rc;
  86 }
  87
  88 /*
  89  * sets the supported operational attributes (if required)
  90  */
  91 int
  92 bdb_operational(
  93         Operation       *op,
  94         SlapReply       *rs,
  95         int             opattrs,
  96         Attribute       **a )
  97 {
  98         Attribute       **aa = a;
  99
 100         assert( rs->sr_entry );
 101
 102         if ( opattrs || ad_inlist( slap_schema.si_ad_hasSubordinates, rs->sr_attrs ) ) {
 103                 int     hasSubordinates;
 104
 105                 rs->sr_err = bdb_hasSubordinates( op, rs->sr_entry, &hasSubordinates );
 106                 if ( rs->sr_err == LDAP_SUCCESS ) {
 107                         *aa = slap_operational_hasSubordinate( hasSubordinates == LDAP_COMPARE_TRUE );
 108                         if ( *aa != NULL ) {
 109                                 aa = &(*aa)->a_next;
 110                         }
 111                 }
 112         }
 113
 114         return rs->sr_err;
 115 }
 116