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

   1 /* $OpenLDAP$ */
   2 /*
   3  * Context CSN Management Routines
   4  */
   5 /* Copyright (c) 2003 by International Business Machines, Inc.
   6  *
   7  * International Business Machines, Inc. (hereinafter called IBM) grants
   8  * permission under its copyrights to use, copy, modify, and distribute this
   9  * Software with or without fee, provided that the above copyright notice and
  10  * all paragraphs of this notice appear in all copies, and that the name of IBM
  11  * not be used in connection with the marketing of any product incorporating
  12  * the Software or modifications thereof, without specific, written prior
  13  * permission.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", AND IBM DISCLAIMS ALL WARRANTIES,
  16  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
  17  * PARTICULAR PURPOSE.  IN NO EVENT SHALL IBM BE LIABLE FOR ANY SPECIAL,
  18  * DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER ARISING
  19  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE, EVEN
  20  * IF IBM IS APPRISED OF THE POSSIBILITY OF SUCH DAMAGES.
  21  */
  22
  23 #include "portable.h"
  24
  25 #include <stdio.h>
  26
  27 #include <ac/string.h>
  28 #include <ac/socket.h>
  29 #include <db.h>
  30
  31 #include "ldap_pvt.h"
  32 #include "lutil.h"
  33 #include "slap.h"
  34 #include "lutil_ldap.h"
  35
  36 struct berval *
  37 slap_get_commit_csn( Operation *op )
  38 {
  39         struct berval *max_committed_csn = NULL;
  40         struct slap_csn_entry *csne = NULL, *committed_csne = NULL;
  41         int i = 0;
  42
  43         ldap_pvt_thread_mutex_lock( &op->o_bd->be_pcl_mutex );
  44
  45         LDAP_TAILQ_FOREACH( csne, &op->o_bd->be_pending_csn_list, csn_link ) {
  46                 if ( csne->opid == op->o_opid && csne->connid == op->o_connid )
  47                         break;
  48         }
  49
  50         if ( csne ) {
  51                 csne->state = SLAP_CSN_COMMIT;
  52         }
  53
  54         LDAP_TAILQ_FOREACH( csne, &op->o_bd->be_pending_csn_list, csn_link ) {
  55                 if ( csne->state == SLAP_CSN_COMMIT )
  56                         committed_csne = csne;
  57                 if ( csne->state == SLAP_CSN_PENDING )
  58                         break;
  59         }
  60
  61         ldap_pvt_thread_mutex_unlock( &op->o_bd->be_pcl_mutex );
  62
  63         if ( committed_csne ) {
  64                 max_committed_csn = ber_dupbv( NULL, committed_csne->csn );
  65         }
  66
  67         return max_committed_csn;
  68 }
  69
  70 void
  71 slap_rewind_commit_csn( Operation *op )
  72 {
  73         struct slap_csn_entry *csne = NULL;
  74
  75         ldap_pvt_thread_mutex_lock( &op->o_bd->be_pcl_mutex );
  76
  77         LDAP_TAILQ_FOREACH( csne, &op->o_bd->be_pending_csn_list, csn_link ) {
  78                 if ( csne->opid == op->o_opid && csne->connid == op->o_connid )
  79                         break;
  80         }
  81
  82         if ( csne ) {
  83                 csne->state = SLAP_CSN_PENDING;
  84         }
  85
  86         ldap_pvt_thread_mutex_unlock( &op->o_bd->be_pcl_mutex );
  87 }
  88
  89 void
  90 slap_graduate_commit_csn( Operation *op )
  91 {
  92         struct slap_csn_entry *csne = NULL;
  93
  94         ldap_pvt_thread_mutex_lock( &op->o_bd->be_pcl_mutex );
  95
  96         LDAP_TAILQ_FOREACH( csne, &op->o_bd->be_pending_csn_list, csn_link ) {
  97                 if ( csne->opid == op->o_opid && csne->connid == op->o_connid )
  98                         break;
  99         }
 100
 101         if ( csne ) {
 102                 LDAP_TAILQ_REMOVE( &op->o_bd->be_pending_csn_list, csne, csn_link );
 103                 ch_free( csne->csn->bv_val );
 104                 ch_free( csne->csn );
 105                 ch_free( csne );
 106         }
 107
 108         ldap_pvt_thread_mutex_unlock( &op->o_bd->be_pcl_mutex );
 109
 110         return;
 111 }
 112
 113 static struct berval ocbva[] = {
 114         BER_BVC("top"),
 115         BER_BVC("subentry"),
 116         BER_BVC("syncProviderSubentry"),
 117         {0,NULL}
 118 };
 119
 120 Entry *
 121 slap_create_context_csn_entry(
 122         Backend *be,
 123         struct berval *context_csn
 124 )
 125 {
 126         Entry* e;
 127         int rc;
 128
 129         struct berval bv;
 130
 131         e = ( Entry * ) ch_calloc( 1, sizeof( Entry ));
 132
 133         attr_merge( e, slap_schema.si_ad_objectClass, ocbva, NULL );
 134
 135         bv.bv_val = "subentry";
 136         bv.bv_len = sizeof("subentry")-1;
 137
 138         attr_merge_one( e, slap_schema.si_ad_structuralObjectClass, &bv, NULL );
 139
 140         attr_merge_one( e, slap_schema.si_ad_cn, &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], &slap_ldapsync_cn_bv );
 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 ( manage_ctxcsn ) {
 183                 pending = (struct slap_csn_entry *) ch_calloc( 1, sizeof( struct slap_csn_entry ));
 184         }
 185
 186         if ( csn == NULL )
 187                 return LDAP_OTHER;
 188
 189         csn->bv_len = lutil_csnstr( csnbuf, len, 0, 0 );
 190         csn->bv_val = csnbuf;
 191
 192         if ( manage_ctxcsn ) {
 193                 ldap_pvt_thread_mutex_lock( &op->o_bd->be_pcl_mutex );
 194                 pending->csn = ber_dupbv( NULL, csn );
 195                 pending->connid = op->o_connid;
 196                 pending->opid = op->o_opid;
 197                 pending->state = SLAP_CSN_PENDING;
 198                 LDAP_TAILQ_INSERT_TAIL( &op->o_bd->be_pending_csn_list, pending, csn_link );
 199                 ldap_pvt_thread_mutex_unlock( &op->o_bd->be_pcl_mutex );
 200         }
 201
 202         return LDAP_SUCCESS;
 203 }