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 = NULL, *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                         break;
  47         }
  48
  49         if ( csne ) {
  50                 csne->state = SLAP_CSN_COMMIT;
  51         }
  52
  53         LDAP_TAILQ_FOREACH( csne, &op->o_bd->be_pending_csn_list, csn_link ) {
  54                 if ( csne->state == SLAP_CSN_COMMIT )
  55                         committed_csne = csne;
  56                 if ( csne->state == SLAP_CSN_PENDING )
  57                         break;
  58         }
  59
  60         ldap_pvt_thread_mutex_unlock( &op->o_bd->be_pcl_mutex );
  61
  62         if ( committed_csne ) {
  63                 ber_dupbv( csn, committed_csne->csn );
  64         }
  65 }
  66
  67 void
  68 slap_rewind_commit_csn( Operation *op )
  69 {
  70         struct slap_csn_entry *csne = NULL;
  71
  72         ldap_pvt_thread_mutex_lock( &op->o_bd->be_pcl_mutex );
  73
  74         LDAP_TAILQ_FOREACH( csne, &op->o_bd->be_pending_csn_list, csn_link ) {
  75                 if ( csne->opid == op->o_opid && csne->connid == op->o_connid )
  76                         break;
  77         }
  78
  79         if ( csne ) {
  80                 csne->state = SLAP_CSN_PENDING;
  81         }
  82
  83         ldap_pvt_thread_mutex_unlock( &op->o_bd->be_pcl_mutex );
  84 }
  85
  86 void
  87 slap_graduate_commit_csn( Operation *op )
  88 {
  89         struct slap_csn_entry *csne = NULL;
  90
  91         if ( op == NULL )
  92                 return;
  93
  94         if ( op->o_bd == NULL )
  95                 return;
  96
  97         ldap_pvt_thread_mutex_lock( &op->o_bd->be_pcl_mutex );
  98
  99         LDAP_TAILQ_FOREACH( csne, &op->o_bd->be_pending_csn_list, csn_link ) {
 100                 if ( csne->opid == op->o_opid && csne->connid == op->o_connid )
 101                         break;
 102         }
 103
 104         if ( csne ) {
 105                 LDAP_TAILQ_REMOVE( &op->o_bd->be_pending_csn_list, csne, csn_link );
 106                 ch_free( csne->csn->bv_val );
 107                 ch_free( csne->csn );
 108                 ch_free( csne );
 109         }
 110
 111         ldap_pvt_thread_mutex_unlock( &op->o_bd->be_pcl_mutex );
 112
 113         return;
 114 }
 115
 116 static struct berval ocbva[] = {
 117         BER_BVC("top"),
 118         BER_BVC("subentry"),
 119         BER_BVC("syncProviderSubentry"),
 120         {0,NULL}
 121 };
 122
 123 Entry *
 124 slap_create_context_csn_entry(
 125         Backend *be,
 126         struct berval *context_csn
 127 )
 128 {
 129         Entry* e;
 130         int rc;
 131
 132         struct berval bv;
 133
 134         e = ( Entry * ) ch_calloc( 1, sizeof( Entry ));
 135
 136         attr_merge( e, slap_schema.si_ad_objectClass, ocbva, NULL );
 137
 138         attr_merge_one( e, slap_schema.si_ad_structuralObjectClass, &ocbva[1], NULL );
 139
 140         attr_merge_one( e, slap_schema.si_ad_cn, (struct berval *)&slap_ldapsync_bv, NULL );
 141
 142         if ( context_csn ) {
 143                 attr_merge_one( e, slap_schema.si_ad_contextCSN,
 144                         context_csn, NULL );
 145         }
 146
 147         bv.bv_val = "{}";
 148         bv.bv_len = sizeof("{}")-1;
 149         attr_merge_one( e, slap_schema.si_ad_subtreeSpecification, &bv, NULL );
 150
 151         build_new_dn( &e->e_name, &be->be_nsuffix[0], (struct berval *)&slap_ldapsync_cn_bv, NULL );
 152         ber_dupbv( &e->e_nname, &e->e_name );
 153
 154         return e;
 155 }
 156
 157 static int
 158 slap_contextcsn_callback(
 159         Operation* op,
 160         SlapReply* rs
 161 )
 162 {
 163         if ( rs->sr_type != REP_SEARCH ) {
 164                 *((int*)op->o_callback->sc_private) = 0;
 165         } else {
 166                 *((int*)op->o_callback->sc_private) = 1;
 167         }
 168         return LDAP_SUCCESS;
 169 }
 170
 171 int
 172 slap_get_csn(
 173         Operation *op,
 174         char *csnbuf,
 175         int     len,
 176         struct berval *csn,
 177         int manage_ctxcsn
 178 )
 179 {
 180         struct  slap_csn_entry *pending;
 181
 182         if ( csn == NULL )
 183                 return LDAP_OTHER;
 184
 185         csn->bv_len = lutil_csnstr( csnbuf, len, 0, 0 );
 186         csn->bv_val = csnbuf;
 187
 188         if ( manage_ctxcsn ) {
 189                 pending = (struct slap_csn_entry *) ch_calloc( 1, sizeof( struct slap_csn_entry ));
 190                 ldap_pvt_thread_mutex_lock( &op->o_bd->be_pcl_mutex );
 191                 ber_dupbv( &op->o_sync_csn, csn );
 192                 pending->csn = ber_dupbv( NULL, csn );
 193                 pending->connid = op->o_connid;
 194                 pending->opid = op->o_opid;
 195                 pending->state = SLAP_CSN_PENDING;
 196                 LDAP_TAILQ_INSERT_TAIL( &op->o_bd->be_pending_csn_list, pending, csn_link );
 197                 ldap_pvt_thread_mutex_unlock( &op->o_bd->be_pcl_mutex );
 198         }
 199
 200         return LDAP_SUCCESS;
 201 }