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 ) break;
  46         }
  47
  48         if ( csne ) {
  49                 csne->state = SLAP_CSN_COMMIT;
  50         }
  51
  52         LDAP_TAILQ_FOREACH( csne, &op->o_bd->be_pending_csn_list, csn_link ) {
  53                 if ( csne->state == SLAP_CSN_COMMIT ) committed_csne = csne;
  54                 if ( csne->state == SLAP_CSN_PENDING ) break;
  55         }
  56
  57         ldap_pvt_thread_mutex_unlock( &op->o_bd->be_pcl_mutex );
  58
  59         if ( committed_csne ) {
  60                 ber_dupbv( csn, committed_csne->csn );
  61         }
  62 }
  63
  64 void
  65 slap_rewind_commit_csn( Operation *op )
  66 {
  67         struct slap_csn_entry *csne = NULL;
  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 ) break;
  73         }
  74
  75         if ( csne ) {
  76                 csne->state = SLAP_CSN_PENDING;
  77         }
  78
  79         ldap_pvt_thread_mutex_unlock( &op->o_bd->be_pcl_mutex );
  80 }
  81
  82 void
  83 slap_graduate_commit_csn( Operation *op )
  84 {
  85         struct slap_csn_entry *csne = NULL;
  86
  87         if ( op == NULL )
  88                 return;
  89
  90         if ( op->o_bd == NULL )
  91                 return;
  92
  93         ldap_pvt_thread_mutex_lock( &op->o_bd->be_pcl_mutex );
  94
  95         LDAP_TAILQ_FOREACH( csne, &op->o_bd->be_pending_csn_list, csn_link ) {
  96                 if ( csne->opid == op->o_opid && csne->connid == op->o_connid ) break;
  97         }
  98
  99         if ( csne ) {
 100                 LDAP_TAILQ_REMOVE( &op->o_bd->be_pending_csn_list, csne, csn_link );
 101                 ch_free( csne->csn->bv_val );
 102                 ch_free( csne->csn );
 103                 ch_free( csne );
 104         }
 105
 106         ldap_pvt_thread_mutex_unlock( &op->o_bd->be_pcl_mutex );
 107
 108         return;
 109 }
 110
 111 static struct berval ocbva[] = {
 112         BER_BVC("top"),
 113         BER_BVC("subentry"),
 114         BER_BVC("syncProviderSubentry"),
 115         {0,NULL}
 116 };
 117
 118 Entry *
 119 slap_create_context_csn_entry(
 120         Backend *be,
 121         struct berval *context_csn
 122 )
 123 {
 124         Entry* e;
 125         int rc;
 126
 127         struct berval bv;
 128
 129         e = (Entry *) ch_calloc( 1, sizeof( Entry ));
 130
 131         attr_merge( e, slap_schema.si_ad_objectClass,
 132                 ocbva, NULL );
 133         attr_merge_one( e, slap_schema.si_ad_structuralObjectClass,
 134                 &ocbva[1], NULL );
 135         attr_merge_one( e, slap_schema.si_ad_cn,
 136                 (struct berval *)&slap_ldapsync_bv, NULL );
 137
 138         if ( context_csn ) {
 139                 attr_merge_one( e, slap_schema.si_ad_contextCSN,
 140                         context_csn, NULL );
 141         }
 142
 143         bv.bv_val = "{}";
 144         bv.bv_len = sizeof("{}")-1;
 145         attr_merge_one( e, slap_schema.si_ad_subtreeSpecification, &bv, NULL );
 146
 147         build_new_dn( &e->e_name, &be->be_nsuffix[0],
 148                 (struct berval *)&slap_ldapsync_cn_bv, NULL );
 149         ber_dupbv( &e->e_nname, &e->e_name );
 150
 151         return e;
 152 }
 153
 154 static int
 155 slap_contextcsn_callback(
 156         Operation* op,
 157         SlapReply* rs
 158 )
 159 {
 160         if ( rs->sr_type != REP_SEARCH ) {
 161                 *((int*)op->o_callback->sc_private) = 0;
 162         } else {
 163                 *((int*)op->o_callback->sc_private) = 1;
 164         }
 165         return LDAP_SUCCESS;
 166 }
 167
 168 int
 169 slap_get_csn(
 170         Operation *op,
 171         char *csnbuf,
 172         int     len,
 173         struct berval *csn,
 174         int manage_ctxcsn
 175 )
 176 {
 177         struct slap_csn_entry *pending;
 178
 179         if ( csn == NULL ) return LDAP_OTHER;
 180
 181         csn->bv_len = lutil_csnstr( csnbuf, len, 0, 0 );
 182         csn->bv_val = csnbuf;
 183
 184         if ( manage_ctxcsn ) {
 185                 pending = (struct slap_csn_entry *) ch_calloc( 1,
 186                         sizeof( struct slap_csn_entry ));
 187                 ldap_pvt_thread_mutex_lock( &op->o_bd->be_pcl_mutex );
 188                 ber_dupbv( &op->o_sync_csn, csn );
 189                 pending->csn = ber_dupbv( NULL, csn );
 190                 pending->connid = op->o_connid;
 191                 pending->opid = op->o_opid;
 192                 pending->state = SLAP_CSN_PENDING;
 193                 LDAP_TAILQ_INSERT_TAIL( &op->o_bd->be_pending_csn_list,
 194                         pending, csn_link );
 195                 ldap_pvt_thread_mutex_unlock( &op->o_bd->be_pcl_mutex );
 196         }
 197
 198         return LDAP_SUCCESS;
 199 }