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 "lutil.h"
  26 #include "slap.h"
  27 #include "lutil_ldap.h"
  28
  29 const struct berval slap_ldapsync_bv = BER_BVC("ldapsync");
  30 const struct berval slap_ldapsync_cn_bv = BER_BVC("cn=ldapsync");
  31
  32 void
  33 slap_get_commit_csn( Operation *op, struct berval *csn )
  34 {
  35         struct slap_csn_entry *csne, *committed_csne = NULL;
  36         int i = 0;
  37
  38         csn->bv_val = NULL;
  39         csn->bv_len = 0;
  40
  41         ldap_pvt_thread_mutex_lock( op->o_bd->be_pcl_mutexp );
  42
  43         LDAP_TAILQ_FOREACH( csne, op->o_bd->be_pending_csn_list, ce_csn_link ) {
  44                 if ( csne->ce_opid == op->o_opid && csne->ce_connid == op->o_connid ) {
  45                         csne->ce_state = SLAP_CSN_COMMIT;
  46                         break;
  47                 }
  48         }
  49
  50         LDAP_TAILQ_FOREACH( csne, op->o_bd->be_pending_csn_list, ce_csn_link ) {
  51                 if ( csne->ce_state == SLAP_CSN_COMMIT ) committed_csne = csne;
  52                 if ( csne->ce_state == SLAP_CSN_PENDING ) break;
  53         }
  54
  55         if ( committed_csne ) ber_dupbv_x( csn, committed_csne->ce_csn, op->o_tmpmemctx );
  56         ldap_pvt_thread_mutex_unlock( op->o_bd->be_pcl_mutexp );
  57 }
  58
  59 void
  60 slap_rewind_commit_csn( Operation *op )
  61 {
  62         struct slap_csn_entry *csne;
  63
  64         ldap_pvt_thread_mutex_lock( op->o_bd->be_pcl_mutexp );
  65
  66         LDAP_TAILQ_FOREACH( csne, op->o_bd->be_pending_csn_list, ce_csn_link ) {
  67                 if ( csne->ce_opid == op->o_opid && csne->ce_connid == op->o_connid ) {
  68                         csne->ce_state = SLAP_CSN_PENDING;
  69                         break;
  70                 }
  71         }
  72
  73         ldap_pvt_thread_mutex_unlock( op->o_bd->be_pcl_mutexp );
  74 }
  75
  76 void
  77 slap_graduate_commit_csn( Operation *op )
  78 {
  79         struct slap_csn_entry *csne;
  80
  81         if ( op == NULL ) return;
  82         if ( op->o_bd == NULL ) return;
  83
  84         ldap_pvt_thread_mutex_lock( op->o_bd->be_pcl_mutexp );
  85
  86         LDAP_TAILQ_FOREACH( csne, op->o_bd->be_pending_csn_list, ce_csn_link ) {
  87                 if ( csne->ce_opid == op->o_opid && csne->ce_connid == op->o_connid ) {
  88                         LDAP_TAILQ_REMOVE( op->o_bd->be_pending_csn_list,
  89                                 csne, ce_csn_link );
  90                         ch_free( csne->ce_csn->bv_val );
  91                         ch_free( csne->ce_csn );
  92                         ch_free( csne );
  93                         break;
  94                 }
  95         }
  96
  97         ldap_pvt_thread_mutex_unlock( op->o_bd->be_pcl_mutexp );
  98
  99         return;
 100 }
 101
 102 static struct berval ocbva[] = {
 103         BER_BVC("top"),
 104         BER_BVC("subentry"),
 105         BER_BVC("syncProviderSubentry"),
 106         BER_BVNULL
 107 };
 108
 109 Entry *
 110 slap_create_context_csn_entry(
 111         Backend *be,
 112         struct berval *context_csn )
 113 {
 114         Entry* e;
 115         int rc;
 116
 117         struct berval bv;
 118
 119         e = (Entry *) ch_calloc( 1, sizeof( Entry ));
 120
 121         attr_merge( e, slap_schema.si_ad_objectClass,
 122                 ocbva, NULL );
 123         attr_merge_one( e, slap_schema.si_ad_structuralObjectClass,
 124                 &ocbva[1], NULL );
 125         attr_merge_one( e, slap_schema.si_ad_cn,
 126                 (struct berval *)&slap_ldapsync_bv, NULL );
 127
 128         if ( context_csn ) {
 129                 attr_merge_one( e, slap_schema.si_ad_contextCSN,
 130                         context_csn, NULL );
 131         }
 132
 133         BER_BVSTR( &bv, "{}" );
 134         attr_merge_one( e, slap_schema.si_ad_subtreeSpecification, &bv, NULL );
 135
 136         build_new_dn( &e->e_name, &be->be_nsuffix[0],
 137                 (struct berval *)&slap_ldapsync_cn_bv, NULL );
 138         ber_dupbv( &e->e_nname, &e->e_name );
 139
 140         return e;
 141 }
 142
 143 void
 144 slap_queue_csn(
 145         Operation *op,
 146         struct berval *csn )
 147 {
 148         struct slap_csn_entry *pending;
 149
 150         pending = (struct slap_csn_entry *) ch_calloc( 1,
 151                         sizeof( struct slap_csn_entry ));
 152         ldap_pvt_thread_mutex_lock( op->o_bd->be_pcl_mutexp );
 153
 154         pending->ce_csn = ber_dupbv( NULL, csn );
 155         pending->ce_connid = op->o_connid;
 156         pending->ce_opid = op->o_opid;
 157         pending->ce_state = SLAP_CSN_PENDING;
 158         LDAP_TAILQ_INSERT_TAIL( op->o_bd->be_pending_csn_list,
 159                 pending, ce_csn_link );
 160         ldap_pvt_thread_mutex_unlock( op->o_bd->be_pcl_mutexp );
 161 }
 162
 163 int
 164 slap_get_csn(
 165         Operation *op,
 166         char *csnbuf,
 167         int     len,
 168         struct berval *csn,
 169         int manage_ctxcsn )
 170 {
 171         if ( csn == NULL ) return LDAP_OTHER;
 172
 173         csn->bv_len = lutil_csnstr( csnbuf, len, 0, 0 );
 174         csn->bv_val = csnbuf;
 175
 176         if ( manage_ctxcsn )
 177                 slap_queue_csn( op, csn );
 178
 179         return LDAP_SUCCESS;
 180 }