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

   1 /* ctxcsn.c -- Context CSN Management Routines */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 2003-2004 The OpenLDAP Foundation.
   6  * Portions Copyright 2003 IBM Corporation.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted only as authorized by the OpenLDAP
  11  * Public License.
  12  *
  13  * A copy of this license is available in the file LICENSE in the
  14  * top-level directory of the distribution or, alternatively, at
  15  * <http://www.OpenLDAP.org/license.html>.
  16  */
  17
  18 #include "portable.h"
  19
  20 #include <stdio.h>
  21
  22 #include <ac/string.h>
  23 #include <ac/socket.h>
  24
  25 #include "ldap_pvt.h"
  26 #include "lutil.h"
  27 #include "slap.h"
  28 #include "lutil_ldap.h"
  29
  30 const struct berval slap_ldapsync_bv = BER_BVC("ldapsync");
  31 const struct berval slap_ldapsync_cn_bv = BER_BVC("cn=ldapsync");
  32
  33 void
  34 slap_get_commit_csn( Operation *op, struct berval *csn )
  35 {
  36         struct slap_csn_entry *csne, *committed_csne = NULL;
  37         int i = 0;
  38
  39         csn->bv_val = NULL;
  40         csn->bv_len = 0;
  41
  42         ldap_pvt_thread_mutex_lock( &op->o_bd->be_pcl_mutex );
  43
  44         LDAP_TAILQ_FOREACH( csne, op->o_bd->be_pending_csn_list, ce_csn_link ) {
  45                 if ( csne->ce_opid == op->o_opid && csne->ce_connid == op->o_connid ) {
  46                         csne->ce_state = SLAP_CSN_COMMIT;
  47                         break;
  48                 }
  49         }
  50
  51         LDAP_TAILQ_FOREACH( csne, op->o_bd->be_pending_csn_list, ce_csn_link ) {
  52                 if ( csne->ce_state == SLAP_CSN_COMMIT ) committed_csne = csne;
  53                 if ( csne->ce_state == SLAP_CSN_PENDING ) break;
  54         }
  55
  56         if ( committed_csne ) ber_dupbv( csn, committed_csne->ce_csn );
  57         ldap_pvt_thread_mutex_unlock( &op->o_bd->be_pcl_mutex );
  58 }
  59
  60 void
  61 slap_rewind_commit_csn( Operation *op )
  62 {
  63         struct slap_csn_entry *csne;
  64
  65         ldap_pvt_thread_mutex_lock( &op->o_bd->be_pcl_mutex );
  66
  67         LDAP_TAILQ_FOREACH( csne, op->o_bd->be_pending_csn_list, ce_csn_link ) {
  68                 if ( csne->ce_opid == op->o_opid && csne->ce_connid == op->o_connid ) {
  69                         csne->ce_state = SLAP_CSN_PENDING;
  70                         break;
  71                 }
  72         }
  73
  74         ldap_pvt_thread_mutex_unlock( &op->o_bd->be_pcl_mutex );
  75 }
  76
  77 void
  78 slap_graduate_commit_csn( Operation *op )
  79 {
  80         struct slap_csn_entry *csne;
  81
  82         if ( op == NULL ) return;
  83         if ( op->o_bd == NULL ) return;
  84
  85         ldap_pvt_thread_mutex_lock( &op->o_bd->be_pcl_mutex );
  86
  87         LDAP_TAILQ_FOREACH( csne, op->o_bd->be_pending_csn_list, ce_csn_link ) {
  88                 if ( csne->ce_opid == op->o_opid && csne->ce_connid == op->o_connid ) {
  89                         LDAP_TAILQ_REMOVE( op->o_bd->be_pending_csn_list,
  90                                 csne, ce_csn_link );
  91                         ch_free( csne->ce_csn->bv_val );
  92                         ch_free( csne->ce_csn );
  93                         ch_free( csne );
  94                         break;
  95                 }
  96         }
  97
  98         ldap_pvt_thread_mutex_unlock( &op->o_bd->be_pcl_mutex );
  99
 100         return;
 101 }
 102
 103 static struct berval ocbva[] = {
 104         BER_BVC("top"),
 105         BER_BVC("subentry"),
 106         BER_BVC("syncProviderSubentry"),
 107         {0,NULL}
 108 };
 109
 110 Entry *
 111 slap_create_context_csn_entry(
 112         Backend *be,
 113         struct berval *context_csn )
 114 {
 115         Entry* e;
 116         int rc;
 117
 118         struct berval bv;
 119
 120         e = (Entry *) ch_calloc( 1, sizeof( Entry ));
 121
 122         attr_merge( e, slap_schema.si_ad_objectClass,
 123                 ocbva, NULL );
 124         attr_merge_one( e, slap_schema.si_ad_structuralObjectClass,
 125                 &ocbva[1], NULL );
 126         attr_merge_one( e, slap_schema.si_ad_cn,
 127                 (struct berval *)&slap_ldapsync_bv, NULL );
 128
 129         if ( context_csn ) {
 130                 attr_merge_one( e, slap_schema.si_ad_contextCSN,
 131                         context_csn, NULL );
 132         }
 133
 134         bv.bv_val = "{}";
 135         bv.bv_len = sizeof("{}")-1;
 136         attr_merge_one( e, slap_schema.si_ad_subtreeSpecification, &bv, NULL );
 137
 138         build_new_dn( &e->e_name, &be->be_nsuffix[0],
 139                 (struct berval *)&slap_ldapsync_cn_bv, NULL );
 140         ber_dupbv( &e->e_nname, &e->e_name );
 141
 142         return e;
 143 }
 144
 145 int
 146 slap_get_csn(
 147         Operation *op,
 148         char *csnbuf,
 149         int     len,
 150         struct berval *csn,
 151         int manage_ctxcsn )
 152 {
 153         struct slap_csn_entry *pending;
 154
 155         if ( csn == NULL ) return LDAP_OTHER;
 156
 157         csn->bv_len = lutil_csnstr( csnbuf, len, 0, 0 );
 158         csn->bv_val = csnbuf;
 159
 160         if ( manage_ctxcsn ) {
 161                 pending = (struct slap_csn_entry *) ch_calloc( 1,
 162                         sizeof( struct slap_csn_entry ));
 163                 ldap_pvt_thread_mutex_lock( &op->o_bd->be_pcl_mutex );
 164                 ber_dupbv( &op->o_sync_csn, csn );
 165                 pending->ce_csn = ber_dupbv( NULL, csn );
 166                 pending->ce_connid = op->o_connid;
 167                 pending->ce_opid = op->o_opid;
 168                 pending->ce_state = SLAP_CSN_PENDING;
 169                 LDAP_TAILQ_INSERT_TAIL( op->o_bd->be_pending_csn_list,
 170                         pending, ce_csn_link );
 171                 ldap_pvt_thread_mutex_unlock( &op->o_bd->be_pcl_mutex );
 172         }
 173
 174         return LDAP_SUCCESS;
 175 }