ITS#8789 revert previous patch

And try another approach. Always write contextCSN updates, but
don't set dont_replicate for updates we want propagated.

servers/slapd/overlays/accesslog.c

@@ -1491,17 +1491,9 @@ static int accesslog_response(Operation *op, SlapReply *rs) {
 	if ( lo->mask & LOG_OP_WRITES ) {
 		slap_callback *cb;
 
-		/* Most internal ops are not logged */
-		if ( op->o_dont_replicate) {
-			/* Let contextCSN updates from syncrepl thru; the underlying
-			 * syncprov needs to see them. Skip others.
-			 */
-			if (( op->o_tag != LDAP_REQ_MODIFY ||
-				op->orm_modlist->sml_op != LDAP_MOD_REPLACE ||
-				op->orm_modlist->sml_desc != slap_schema.si_ad_contextCSN ) &&
-				op->orm_no_opattrs )
+		/* These internal ops are not logged */
+		if ( op->o_dont_replicate )
 			return SLAP_CB_CONTINUE;
-		}
 
 		ldap_pvt_thread_mutex_lock( &li->li_log_mutex );
 		old = li->li_old;
@@ -1963,18 +1955,8 @@ accesslog_op_mod( Operation *op, SlapReply *rs )
 	int doit = 0;
 
 	/* These internal ops are not logged */
-	if ( op->o_dont_replicate ) {
-		/* Let contextCSN updates from syncrepl thru; the underlying
-		 * syncprov needs to see them. Skip others.
-		 */
-		if (( op->o_tag != LDAP_REQ_MODIFY ||
-			op->orm_modlist->sml_op != LDAP_MOD_REPLACE ||
-			op->orm_modlist->sml_desc != slap_schema.si_ad_contextCSN ) &&
-			op->orm_no_opattrs )
+	if ( op->o_dont_replicate )
 		return SLAP_CB_CONTINUE;
-		/* give this a unique timestamp */
-		op->o_tincr++;
-	}
 
 	logop = accesslog_op2logop( op );
 	lo = logops+logop+EN_OFFSET;

servers/slapd/overlays/syncprov.c

@@ -1922,21 +1922,24 @@ syncprov_op_response( Operation *op, SlapReply *rs )
 		}
 
 		/* Don't do any processing for consumer contextCSN updates */
-		if ( op->o_dont_replicate ) {
-			if ( op->o_tag == LDAP_REQ_MODIFY &&
-				op->orm_modlist->sml_op == LDAP_MOD_REPLACE &&
-				op->orm_modlist->sml_desc == slap_schema.si_ad_contextCSN ) {
+		if ( SLAPD_SYNC_IS_SYNCCONN( op->o_connid ) &&
+			op->o_tag == LDAP_REQ_MODIFY &&
+			op->orm_modlist->sml_op == LDAP_MOD_REPLACE &&
+			op->orm_modlist->sml_desc == slap_schema.si_ad_contextCSN ) {
 			/* Catch contextCSN updates from syncrepl. We have to look at
 			 * all the attribute values, as there may be more than one csn
 			 * that changed, and only one can be passed in the csn queue.
 			 */
-				csn_changed = syncprov_new_ctxcsn( opc, si, csn_changed,
-					op->orm_modlist->sml_numvals, op->orm_modlist->sml_values );
-			} else {
-				ldap_pvt_thread_rdwr_wunlock( &si->si_csn_rwlock );
-			}
+			csn_changed = syncprov_new_ctxcsn( opc, si, csn_changed,
+				op->orm_modlist->sml_numvals, op->orm_modlist->sml_values );
+			if ( csn_changed )
+				si->si_numops++;
+			goto leave;
+		}
+		if ( op->o_dont_replicate ) {
 			if ( csn_changed )
 				si->si_numops++;
+			ldap_pvt_thread_rdwr_wunlock( &si->si_csn_rwlock );
 			goto leave;
 		}
 

servers/slapd/syncrepl.c

@@ -118,7 +118,6 @@ typedef struct syncinfo_s {
 	int			si_got;
 	int			si_strict_refresh;	/* stop listening during fallback refresh */
 	int			si_too_old;
-	int			si_has_syncprov;
 	ber_int_t	si_msgid;
 	Avlnode			*si_presentlist;
 	LDAP			*si_ld;
@@ -555,7 +554,6 @@ check_syncprov(
 			ber_bvarray_free( a.a_nvals );
 		}
 		ber_bvarray_free( a.a_vals );
-		si->si_has_syncprov = 1;
 	}
 	/* See if the cookieState has changed due to anything outside
 	 * this particular consumer. That includes other consumers in
@@ -720,8 +718,6 @@ do_syncrep1(
 					si->si_syncCookie.sids[i] = si->si_cookieState->cs_sids[i];
 			}
 			ldap_pvt_thread_mutex_unlock( &si->si_cookieState->cs_mutex );
-			/* Also look in syncprov overlay, if it was already active */
-			check_syncprov( op, si );
 		}
 
 		ch_free( si->si_syncCookie.octet_str.bv_val );
@@ -3957,47 +3953,46 @@ syncrepl_updateCookie(
 	si->si_cookieState->cs_updating = 1;
 	ldap_pvt_thread_mutex_unlock( &si->si_cookieState->cs_mutex );
 
-	if ( save || !si->si_has_syncprov ) {
-		op->o_bd = si->si_wbe;
-		slap_queue_csn( op, &first );
-
-		op->o_tag = LDAP_REQ_MODIFY;
-
-		cb.sc_response = syncrepl_null_callback;
-		cb.sc_private = si;
-
-		op->o_callback = &cb;
-		op->o_req_dn = si->si_contextdn;
-		op->o_req_ndn = si->si_contextdn;
-
-		/* update contextCSN */
-		op->o_dont_replicate = 1;
+	op->o_bd = si->si_wbe;
+	slap_queue_csn( op, &first );
 
-		mod.sml_numvals = sc.numcsns;
-		mod.sml_values = sc.ctxcsn;
+	op->o_tag = LDAP_REQ_MODIFY;
 
-		op->orm_modlist = &mod;
-		op->orm_no_opattrs = 1;
-		rc = op->o_bd->be_modify( op, &rs_modify );
-
-		if ( rs_modify.sr_err == LDAP_NO_SUCH_OBJECT &&
-			SLAP_SYNC_SUBENTRY( op->o_bd )) {
-			const char	*text;
-			char txtbuf[SLAP_TEXT_BUFLEN];
-			size_t textlen = sizeof txtbuf;
-			Entry *e = slap_create_context_csn_entry( op->o_bd, NULL );
-			rs_reinit( &rs_modify, REP_RESULT );
-			rc = slap_mods2entry( &mod, &e, 0, 1, &text, txtbuf, textlen);
-			op->ora_e = e;
-			rc = op->o_bd->be_add( op, &rs_modify );
-			if ( e == op->ora_e )
-				be_entry_release_w( op, op->ora_e );
-		}
+	cb.sc_response = syncrepl_null_callback;
+	cb.sc_private = si;
 
-		op->orm_no_opattrs = 0;
-		op->o_dont_replicate = 0;
-	} else {
-		rc = 0;
+	op->o_callback = &cb;
+	op->o_req_dn = si->si_contextdn;
+	op->o_req_ndn = si->si_contextdn;
+
+	/* update contextCSN */
+	op->o_dont_replicate = !save;
+
+	/* avoid timestamp collisions */
+	if ( save )
+		slap_op_time( &op->o_time, &op->o_tincr );
+
+	mod.sml_numvals = sc.numcsns;
+	mod.sml_values = sc.ctxcsn;
+
+	op->orm_modlist = &mod;
+	op->orm_no_opattrs = 1;
+	rc = op->o_bd->be_modify( op, &rs_modify );
+
+	if ( rs_modify.sr_err == LDAP_NO_SUCH_OBJECT &&
+		SLAP_SYNC_SUBENTRY( op->o_bd )) {
+		const char	*text;
+		char txtbuf[SLAP_TEXT_BUFLEN];
+		size_t textlen = sizeof txtbuf;
+		Entry *e = slap_create_context_csn_entry( op->o_bd, NULL );
+		rs_reinit( &rs_modify, REP_RESULT );
+		rc = slap_mods2entry( &mod, &e, 0, 1, &text, txtbuf, textlen);
+		slap_queue_csn( op, &first );
+		op->o_tag = LDAP_REQ_ADD;
+		op->ora_e = e;
+		rc = op->o_bd->be_add( op, &rs_modify );
+		if ( e == op->ora_e )
+			be_entry_release_w( op, op->ora_e );
 	}
 
 	op->orm_no_opattrs = 0;
@@ -4040,8 +4035,7 @@ syncrepl_updateCookie(
 	ldap_pvt_thread_mutex_unlock( &si->si_cookieState->cs_mutex );
 
 	op->o_bd = be;
-	if ( op->o_csn.bv_val )
-		op->o_tmpfree( op->o_csn.bv_val, op->o_tmpmemctx );
+	op->o_tmpfree( op->o_csn.bv_val, op->o_tmpmemctx );
 	BER_BVZERO( &op->o_csn );
 	if ( mod.sml_next ) slap_mods_free( mod.sml_next, 1 );