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 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, csn_link ) {
  45                 if ( csne->opid == op->o_opid && csne->connid == op->o_connid ) {
  46                         csne->state = SLAP_CSN_COMMIT;
  47                         break;
  48                 }
  49         }
  50
  51         LDAP_TAILQ_FOREACH( csne, &op->o_bd->be_pending_csn_list, csn_link ) {
  52                 if ( csne->state == SLAP_CSN_COMMIT ) committed_csne = csne;
  53                 if ( csne->state == SLAP_CSN_PENDING ) break;
  54         }
  55
  56         if ( committed_csne ) {
  57                 ber_dupbv( csn, committed_csne->csn );
  58         }
  59
  60         ldap_pvt_thread_mutex_unlock( &op->o_bd->be_pcl_mutex );
  61
  62 }
  63
  64 void
  65 slap_rewind_commit_csn( Operation *op )
  66 {
  67         struct slap_csn_entry *csne;
  68
  69         ldap_pvt_thread_mutex_lock( &op->o_bd->be_pcl_mutex );
  70
  71         LDAP_TAILQ_FOREACH( csne, &op->o_bd->be_pending_csn_list, csn_link ) {
  72                 if ( csne->opid == op->o_opid && csne->connid == op->o_connid ) {
  73                         csne->state = SLAP_CSN_PENDING;
  74                         break;
  75                 }
  76         }
  77
  78         ldap_pvt_thread_mutex_unlock( &op->o_bd->be_pcl_mutex );
  79 }
  80
  81 void
  82 slap_graduate_commit_csn( Operation *op )
  83 {
  84         struct slap_csn_entry *csne;
  85
  86         if ( op == NULL )
  87                 return;
  88
  89         if ( op->o_bd == NULL )
  90                 return;
  91
  92         ldap_pvt_thread_mutex_lock( &op->o_bd->be_pcl_mutex );
  93
  94         LDAP_TAILQ_FOREACH( csne, &op->o_bd->be_pending_csn_list, csn_link ) {
  95                 if ( csne->opid == op->o_opid && csne->connid == op->o_connid ) {
  96                         LDAP_TAILQ_REMOVE( &op->o_bd->be_pending_csn_list, csne, csn_link );
  97                         ch_free( csne->csn->bv_val );
  98                         ch_free( csne->csn );
  99                         ch_free( csne );
 100                         break;
 101                 }
 102         }
 103
 104         ldap_pvt_thread_mutex_unlock( &op->o_bd->be_pcl_mutex );
 105
 106         return;
 107 }
 108
 109 static struct berval ocbva[] = {
 110         BER_BVC("top"),
 111         BER_BVC("subentry"),
 112         BER_BVC("syncProviderSubentry"),
 113         {0,NULL}
 114 };
 115
 116 Entry *
 117 slap_create_context_csn_entry(
 118         Backend *be,
 119         struct berval *context_csn
 120 )
 121 {
 122         Entry* e;
 123         int rc;
 124
 125         struct berval bv;
 126
 127         e = (Entry *) ch_calloc( 1, sizeof( Entry ));
 128
 129         attr_merge( e, slap_schema.si_ad_objectClass,
 130                 ocbva, NULL );
 131         attr_merge_one( e, slap_schema.si_ad_structuralObjectClass,
 132                 &ocbva[1], NULL );
 133         attr_merge_one( e, slap_schema.si_ad_cn,
 134                 (struct berval *)&slap_ldapsync_bv, NULL );
 135
 136         if ( context_csn ) {
 137                 attr_merge_one( e, slap_schema.si_ad_contextCSN,
 138                         context_csn, NULL );
 139         }
 140
 141         bv.bv_val = "{}";
 142         bv.bv_len = sizeof("{}")-1;
 143         attr_merge_one( e, slap_schema.si_ad_subtreeSpecification, &bv, NULL );
 144
 145         build_new_dn( &e->e_name, &be->be_nsuffix[0],
 146                 (struct berval *)&slap_ldapsync_cn_bv, NULL );
 147         ber_dupbv( &e->e_nname, &e->e_name );
 148
 149         return e;
 150 }
 151
 152 int
 153 slap_get_csn(
 154         Operation *op,
 155         char *csnbuf,
 156         int     len,
 157         struct berval *csn,
 158         int manage_ctxcsn
 159 )
 160 {
 161         struct slap_csn_entry *pending;
 162
 163         if ( csn == NULL ) return LDAP_OTHER;
 164
 165         csn->bv_len = lutil_csnstr( csnbuf, len, 0, 0 );
 166         csn->bv_val = csnbuf;
 167
 168         if ( manage_ctxcsn ) {
 169                 pending = (struct slap_csn_entry *) ch_calloc( 1,
 170                         sizeof( struct slap_csn_entry ));
 171                 ldap_pvt_thread_mutex_lock( &op->o_bd->be_pcl_mutex );
 172                 ber_dupbv( &op->o_sync_csn, csn );
 173                 pending->csn = ber_dupbv( NULL, csn );
 174                 pending->connid = op->o_connid;
 175                 pending->opid = op->o_opid;
 176                 pending->state = SLAP_CSN_PENDING;
 177                 LDAP_TAILQ_INSERT_TAIL( &op->o_bd->be_pending_csn_list,
 178                         pending, csn_link );
 179                 ldap_pvt_thread_mutex_unlock( &op->o_bd->be_pcl_mutex );
 180         }
 181
 182         return LDAP_SUCCESS;
 183 }