Merge branch 'master' of git://git.samba.org/samba
[ira/wip.git] / source4 / dsdb / samdb / ldb_modules / repl_meta_data.c
index 78e7aca92f1785d3e5cc9b7ce5fbfb039e37b553..53d6d0749ccab3477400759a789ee88519099784 100644 (file)
@@ -1,10 +1,10 @@
 /* 
    ldb database library
 
-   Copyright (C) Simo Sorce  2004-2006
+   Copyright (C) Simo Sorce  2004-2008
    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
    Copyright (C) Andrew Tridgell 2005
-   Copyright (C) Stefan Metzmacher 2007
+   Copyright (C) Stefan Metzmacher <metze@samba.org> 2007
 
      ** NOTE! The following LGPL license applies to the ldb
      ** library. This does NOT imply that all of Samba is released
@@ -13,7 +13,7 @@
    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
-   version 2 of the License, or (at your option) any later version.
+   version 3 of the License, or (at your option) any later version.
 
    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -21,8 +21,7 @@
    Lesser General Public License for more details.
 
    You should have received a copy of the GNU Lesser General Public
-   License along with this library; if not, write to the Free Software
-   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+   License along with this library; if not, see <http://www.gnu.org/licenses/>.
 */
 
 /*
  */
 
 #include "includes.h"
-#include "lib/ldb/include/ldb.h"
-#include "lib/ldb/include/ldb_errors.h"
-#include "lib/ldb/include/ldb_private.h"
+#include "ldb_module.h"
 #include "dsdb/samdb/samdb.h"
-#include "dsdb/common/flags.h"
+#include "../libds/common/flags.h"
 #include "librpc/gen_ndr/ndr_misc.h"
 #include "librpc/gen_ndr/ndr_drsuapi.h"
 #include "librpc/gen_ndr/ndr_drsblobs.h"
+#include "param/param.h"
 
 struct replmd_replicated_request {
        struct ldb_module *module;
-       struct ldb_handle *handle;
-       struct ldb_request *orig_req;
+       struct ldb_request *req;
 
        const struct dsdb_schema *schema;
 
        struct dsdb_extended_replicated_objects *objs;
 
+       /* the controls we pass down */
+       struct ldb_control **controls;
+
        uint32_t index_current;
 
-       struct {
-               TALLOC_CTX *mem_ctx;
-               struct ldb_request *search_req;
-               struct ldb_message *search_msg;
-               int search_ret;
-               struct ldb_request *change_req;
-               int change_ret;
-       } sub;
+       struct ldb_message *search_msg;
 };
 
-static struct replmd_replicated_request *replmd_replicated_init_handle(struct ldb_module *module,
-                                                                      struct ldb_request *req,
-                                                                      struct dsdb_extended_replicated_objects *objs)
+static struct replmd_replicated_request *replmd_ctx_init(struct ldb_module *module,
+                                         struct ldb_request *req)
 {
-       struct replmd_replicated_request *ar;
-       struct ldb_handle *h;
-       const struct dsdb_schema *schema;
+       struct ldb_context *ldb;
+       struct replmd_replicated_request *ac;
 
-       schema = dsdb_get_schema(module->ldb);
-       if (!schema) {
-               ldb_debug_set(module->ldb, LDB_DEBUG_FATAL,
-                             "replmd_replicated_init_handle: no loaded schema found\n");
-               return NULL;
-       }
+       ldb = ldb_module_get_ctx(module);
 
-       h = talloc_zero(req, struct ldb_handle);
-       if (h == NULL) {
-               ldb_set_errstring(module->ldb, "Out of Memory");
+       ac = talloc_zero(req, struct replmd_replicated_request);
+       if (ac == NULL) {
+               ldb_oom(ldb);
                return NULL;
        }
 
-       h->module       = module;
-       h->state        = LDB_ASYNC_PENDING;
-       h->status       = LDB_SUCCESS;
-
-       ar = talloc_zero(h, struct replmd_replicated_request);
-       if (ar == NULL) {
-               ldb_set_errstring(module->ldb, "Out of Memory");
-               talloc_free(h);
-               return NULL;
-       }
-
-       h->private_data = ar;
-
-       ar->module      = module;
-       ar->handle      = h;
-       ar->orig_req    = req;
-       ar->schema      = schema;
-       ar->objs        = objs;
-
-       req->handle = h;
-
-       return ar;
+       ac->module = module;
+       ac->req = req;
+       return ac;
 }
 
 /*
@@ -124,16 +91,16 @@ static int add_time_element(struct ldb_message *msg, const char *attr, time_t t)
        char *s;
 
        if (ldb_msg_find_element(msg, attr) != NULL) {
-               return 0;
+               return LDB_SUCCESS;
        }
 
        s = ldb_timestring(msg, t);
        if (s == NULL) {
-               return -1;
+               return LDB_ERR_OPERATIONS_ERROR;
        }
 
-       if (ldb_msg_add_string(msg, attr, s) != 0) {
-               return -1;
+       if (ldb_msg_add_string(msg, attr, s) != LDB_SUCCESS) {
+               return LDB_ERR_OPERATIONS_ERROR;
        }
 
        el = ldb_msg_find_element(msg, attr);
@@ -141,7 +108,7 @@ static int add_time_element(struct ldb_message *msg, const char *attr, time_t t)
           is ignored */
        el->flags = LDB_FLAG_MOD_REPLACE;
 
-       return 0;
+       return LDB_SUCCESS;
 }
 
 /*
@@ -152,11 +119,11 @@ static int add_uint64_element(struct ldb_message *msg, const char *attr, uint64_
        struct ldb_message_element *el;
 
        if (ldb_msg_find_element(msg, attr) != NULL) {
-               return 0;
+               return LDB_SUCCESS;
        }
 
-       if (ldb_msg_add_fmt(msg, attr, "%llu", (unsigned long long)v) != 0) {
-               return -1;
+       if (ldb_msg_add_fmt(msg, attr, "%llu", (unsigned long long)v) != LDB_SUCCESS) {
+               return LDB_ERR_OPERATIONS_ERROR;
        }
 
        el = ldb_msg_find_element(msg, attr);
@@ -164,7 +131,7 @@ static int add_uint64_element(struct ldb_message *msg, const char *attr, uint64_
           is ignored */
        el->flags = LDB_FLAG_MOD_REPLACE;
 
-       return 0;
+       return LDB_SUCCESS;
 }
 
 static int replmd_replPropertyMetaData1_attid_sort(const struct replPropertyMetaData1 *m1,
@@ -236,70 +203,43 @@ static void replmd_ldb_message_sort(struct ldb_message *msg,
                  discard_const_p(void, schema), (ldb_qsort_cmp_fn_t)replmd_ldb_message_element_attid_sort);
 }
 
-static int replmd_prepare_originating(struct ldb_module *module, struct ldb_request *req,
-                                     struct ldb_dn *dn, const char *fn_name,
-                                     int (*fn)(struct ldb_module *,
-                                               struct ldb_request *,
-                                               const struct dsdb_schema *,
-                                               const struct dsdb_control_current_partition *))
+static int replmd_op_callback(struct ldb_request *req, struct ldb_reply *ares)
 {
-       const struct dsdb_schema *schema;
-       const struct ldb_control *partition_ctrl;
-       const struct dsdb_control_current_partition *partition;
-       /* do not manipulate our control entries */
-       if (ldb_dn_is_special(dn)) {
-               return ldb_next_request(module, req);
-       }
+       struct ldb_context *ldb;
+       struct replmd_replicated_request *ac;
 
-       schema = dsdb_get_schema(module->ldb);
-       if (!schema) {
-               ldb_debug_set(module->ldb, LDB_DEBUG_FATAL,
-                             "%s: no dsdb_schema loaded",
-                             fn_name);
-               return LDB_ERR_CONSTRAINT_VIOLATION;
-       }
+       ac = talloc_get_type(req->context, struct replmd_replicated_request);
+       ldb = ldb_module_get_ctx(ac->module);
 
-       partition_ctrl = get_control_from_list(req->controls, DSDB_CONTROL_CURRENT_PARTITION_OID);
-       if (!partition_ctrl) {
-               ldb_debug_set(module->ldb, LDB_DEBUG_FATAL,
-                             "%s: no current partition control found",
-                             fn_name);
-               return LDB_ERR_CONSTRAINT_VIOLATION;
+       if (!ares) {
+               return ldb_module_done(ac->req, NULL, NULL,
+                                       LDB_ERR_OPERATIONS_ERROR);
        }
-
-       partition = talloc_get_type(partition_ctrl->data,
-                                   struct dsdb_control_current_partition);
-       if (!partition) {
-               ldb_debug_set(module->ldb, LDB_DEBUG_FATAL,
-                             "%s: current partition control contains invalid data",
-                             fn_name);
-               return LDB_ERR_CONSTRAINT_VIOLATION;
+       if (ares->error != LDB_SUCCESS) {
+               return ldb_module_done(ac->req, ares->controls,
+                                       ares->response, ares->error);
        }
 
-       if (partition->version != DSDB_CONTROL_CURRENT_PARTITION_VERSION) {
-               ldb_debug_set(module->ldb, LDB_DEBUG_FATAL,
-                             "%s: current partition control contains invalid version [%u != %u]\n",
-                             fn_name, partition->version, DSDB_CONTROL_CURRENT_PARTITION_VERSION);
-               return LDB_ERR_CONSTRAINT_VIOLATION;
+       if (ares->type != LDB_REPLY_DONE) {
+               ldb_set_errstring(ldb,
+                                 "invalid ldb_reply_type in callback");
+               talloc_free(ares);
+               return ldb_module_done(ac->req, NULL, NULL,
+                                       LDB_ERR_OPERATIONS_ERROR);
        }
 
-       return fn(module, req, schema, partition);
+       return ldb_module_done(ac->req, ares->controls,
+                               ares->response, LDB_SUCCESS);
 }
 
-static int replmd_add_originating(struct ldb_module *module,
-                                 struct ldb_request *req,
-                                 const struct dsdb_schema *schema,
-                                 const struct dsdb_control_current_partition *partition)
+static int replmd_add(struct ldb_module *module, struct ldb_request *req)
 {
-       NTSTATUS nt_status;
+       struct ldb_context *ldb;
+       struct replmd_replicated_request *ac;
+       const struct dsdb_schema *schema;
+       enum ndr_err_code ndr_err;
        struct ldb_request *down_req;
        struct ldb_message *msg;
-       uint32_t instance_type;
-       struct ldb_dn *new_dn;
-       const char *rdn_name;
-       const char *rdn_name_upper;
-       const struct ldb_val *rdn_value = NULL;
        const struct dsdb_attribute *rdn_attr = NULL;
        struct GUID guid;
        struct ldb_val guid_value;
@@ -313,22 +253,37 @@ static int replmd_add_originating(struct ldb_module *module,
        int ret;
        uint32_t i, ni=0;
 
-       ldb_debug(module->ldb, LDB_DEBUG_TRACE, "replmd_add_originating\n");
+       /* do not manipulate our control entries */
+       if (ldb_dn_is_special(req->op.add.message->dn)) {
+               return ldb_next_request(module, req);
+       }
+
+       ldb = ldb_module_get_ctx(module);
 
-       if (ldb_msg_find_element(req->op.add.message, "objectGUID")) {
-               ldb_debug_set(module->ldb, LDB_DEBUG_ERROR,
-                             "replmd_add_originating: it's not allowed to add an object with objectGUID\n");
-               return LDB_ERR_UNWILLING_TO_PERFORM;
+       ldb_debug(ldb, LDB_DEBUG_TRACE, "replmd_add\n");
+
+       schema = dsdb_get_schema(ldb);
+       if (!schema) {
+               ldb_debug_set(ldb, LDB_DEBUG_FATAL,
+                             "replmd_modify: no dsdb_schema loaded");
+               return LDB_ERR_CONSTRAINT_VIOLATION;
        }
 
-       if (ldb_msg_find_element(req->op.add.message, "instanceType")) {
-               ldb_debug_set(module->ldb, LDB_DEBUG_ERROR,
-                             "replmd_add_originating: it's not allowed to add an object with instanceType\n");
+       ac = replmd_ctx_init(module, req);
+       if (!ac) {
+               return LDB_ERR_OPERATIONS_ERROR;
+       }
+
+       ac->schema = schema;
+
+       if (ldb_msg_find_element(req->op.add.message, "objectGUID") != NULL) {
+               ldb_debug_set(ldb, LDB_DEBUG_ERROR,
+                             "replmd_add: it's not allowed to add an object with objectGUID\n");
                return LDB_ERR_UNWILLING_TO_PERFORM;
        }
 
        /* Get a sequence number from the backend */
-       ret = ldb_sequence_number(module->ldb, LDB_SEQ_NEXT, &seq_num);
+       ret = ldb_sequence_number(ldb, LDB_SEQ_NEXT, &seq_num);
        if (ret != LDB_SUCCESS) {
                return ret;
        }
@@ -337,26 +292,17 @@ static int replmd_add_originating(struct ldb_module *module,
        guid = GUID_random();
 
        /* get our invicationId */
-       our_invocation_id = samdb_ntds_invocation_id(module->ldb);
+       our_invocation_id = samdb_ntds_invocation_id(ldb);
        if (!our_invocation_id) {
-               ldb_debug_set(module->ldb, LDB_DEBUG_ERROR,
-                             "replmd_add_originating: unable to find invocationId\n");
+               ldb_debug_set(ldb, LDB_DEBUG_ERROR,
+                             "replmd_add: unable to find invocationId\n");
                return LDB_ERR_OPERATIONS_ERROR;
        }
 
-       /* create a copy of the request */
-       down_req = talloc(req, struct ldb_request);
-       if (down_req == NULL) {
-               ldb_oom(module->ldb);
-               return LDB_ERR_OPERATIONS_ERROR;
-       }
-       *down_req = *req;
-
        /* we have to copy the message as the caller might have it as a const */
-       down_req->op.add.message = msg = ldb_msg_copy_shallow(down_req, req->op.add.message);
+       msg = ldb_msg_copy_shallow(ac, req->op.add.message);
        if (msg == NULL) {
-               talloc_free(down_req);
-               ldb_oom(module->ldb);
+               ldb_oom(ldb);
                return LDB_ERR_OPERATIONS_ERROR;
        }
 
@@ -364,104 +310,24 @@ static int replmd_add_originating(struct ldb_module *module,
        unix_to_nt_time(&now, t);
        time_str = ldb_timestring(msg, t);
        if (!time_str) {
-               talloc_free(down_req);
-               return LDB_ERR_OPERATIONS_ERROR;
-       }
-
-       /*
-        * get details of the rdn name
-        */
-       rdn_name        = ldb_dn_get_rdn_name(msg->dn);
-       if (!rdn_name) {
-               talloc_free(down_req);
-               ldb_oom(module->ldb);
-               return LDB_ERR_OPERATIONS_ERROR;
-       }
-       rdn_attr        = dsdb_attribute_by_lDAPDisplayName(schema, rdn_name);
-       if (!rdn_attr) {
-               talloc_free(down_req);
-               return LDB_ERR_OPERATIONS_ERROR;
-       }
-       rdn_value       = ldb_dn_get_rdn_val(msg->dn);
-       if (!rdn_value) {
-               talloc_free(down_req);
-               ldb_oom(module->ldb);
                return LDB_ERR_OPERATIONS_ERROR;
        }
 
        /* 
         * remove autogenerated attributes
         */
-       ldb_msg_remove_attr(msg, rdn_name);
-       ldb_msg_remove_attr(msg, "name");
        ldb_msg_remove_attr(msg, "whenCreated");
        ldb_msg_remove_attr(msg, "whenChanged");
        ldb_msg_remove_attr(msg, "uSNCreated");
        ldb_msg_remove_attr(msg, "uSNChanged");
        ldb_msg_remove_attr(msg, "replPropertyMetaData");
 
-       /*
-        * TODO: construct a new DN out of:
-        *       - the parent DN
-        *       - the upper case of rdn_attr->LDAPDisplayName
-        *       - rdn_value
-        */
-       new_dn = ldb_dn_copy(msg, msg->dn);
-       if (!new_dn) {
-               talloc_free(down_req);
-               ldb_oom(module->ldb);
-               return LDB_ERR_OPERATIONS_ERROR;
-       }
-       rdn_name_upper = strupper_talloc(msg, rdn_attr->lDAPDisplayName);
-       if (!rdn_name_upper) {
-               talloc_free(down_req);
-               ldb_oom(module->ldb);
-               return LDB_ERR_OPERATIONS_ERROR;
-       }
-       ret = ldb_dn_set_component(new_dn, 0, rdn_name_upper, *rdn_value);
-       if (ret != LDB_SUCCESS) {
-               talloc_free(down_req);
-               ldb_oom(module->ldb);
-               return LDB_ERR_OPERATIONS_ERROR;
-       }
-       msg->dn = new_dn;
-
-       /*
-        * TODO: calculate correct instance type
-        */
-       instance_type = INSTANCE_TYPE_WRITE;
-       if (ldb_dn_compare(partition->dn, msg->dn) == 0) {
-               instance_type |= INSTANCE_TYPE_IS_NC_HEAD;
-               if (ldb_dn_compare(msg->dn, samdb_base_dn(module->ldb)) != 0) {
-                       instance_type |= INSTANCE_TYPE_NC_ABOVE;
-               }
-       }
-
        /*
         * readd replicated attributes
         */
-       ret = ldb_msg_add_value(msg, rdn_attr->lDAPDisplayName, rdn_value, NULL);
-       if (ret != LDB_SUCCESS) {
-               talloc_free(down_req);
-               ldb_oom(module->ldb);
-               return LDB_ERR_OPERATIONS_ERROR;
-       }
-       ret = ldb_msg_add_value(msg, "name", rdn_value, NULL);
-       if (ret != LDB_SUCCESS) {
-               talloc_free(down_req);
-               ldb_oom(module->ldb);
-               return LDB_ERR_OPERATIONS_ERROR;
-       }
        ret = ldb_msg_add_string(msg, "whenCreated", time_str);
        if (ret != LDB_SUCCESS) {
-               talloc_free(down_req);
-               ldb_oom(module->ldb);
-               return LDB_ERR_OPERATIONS_ERROR;
-       }
-       ret = ldb_msg_add_fmt(msg, "instanceType", "%u", instance_type);
-       if (ret != LDB_SUCCESS) {
-               talloc_free(down_req);
-               ldb_oom(module->ldb);
+               ldb_oom(ldb);
                return LDB_ERR_OPERATIONS_ERROR;
        }
 
@@ -473,8 +339,7 @@ static int replmd_add_originating(struct ldb_module *module,
                                               struct replPropertyMetaData1,
                                               nmd.ctr.ctr1.count);
        if (!nmd.ctr.ctr1.array) {
-               talloc_free(down_req);
-               ldb_oom(module->ldb);
+               ldb_oom(ldb);
                return LDB_ERR_OPERATIONS_ERROR;
        }
 
@@ -483,27 +348,34 @@ static int replmd_add_originating(struct ldb_module *module,
                struct replPropertyMetaData1 *m = &nmd.ctr.ctr1.array[ni];
                const struct dsdb_attribute *sa;
 
+               if (e->name[0] == '@') continue;
+
                sa = dsdb_attribute_by_lDAPDisplayName(schema, e->name);
                if (!sa) {
-                       ldb_debug_set(module->ldb, LDB_DEBUG_ERROR,
-                                     "replmd_add_originating: attribute '%s' not defined in schema\n",
+                       ldb_debug_set(ldb, LDB_DEBUG_ERROR,
+                                     "replmd_add: attribute '%s' not defined in schema\n",
                                      e->name);
-                       talloc_free(down_req);
                        return LDB_ERR_NO_SUCH_ATTRIBUTE;
                }
 
-               if (sa->systemFlags & 0x00000001) {
-                       /* attribute is not replicated so it has no meta data */
+               if ((sa->systemFlags & 0x00000001) || (sa->systemFlags & 0x00000004)) {
+                       /* if the attribute is not replicated (0x00000001)
+                        * or constructed (0x00000004) it has no metadata
+                        */
                        continue;
                }
 
                m->attid                        = sa->attributeID_id;
                m->version                      = 1;
-               m->orginating_time              = now;
-               m->orginating_invocation_id     = *our_invocation_id;
-               m->orginating_usn               = seq_num;
+               m->originating_change_time      = now;
+               m->originating_invocation_id    = *our_invocation_id;
+               m->originating_usn              = seq_num;
                m->local_usn                    = seq_num;
                ni++;
+
+               if (ldb_attr_cmp(e->name, ldb_dn_get_rdn_name(msg->dn))) {
+                       rdn_attr = sa;
+               }
        }
 
        /* fix meta data count */
@@ -515,18 +387,20 @@ static int replmd_add_originating(struct ldb_module *module,
        replmd_replPropertyMetaDataCtr1_sort(&nmd.ctr.ctr1, &rdn_attr->attributeID_id);
 
        /* generated NDR encoded values */
-       nt_status = ndr_push_struct_blob(&guid_value, msg, &guid, 
-                                        (ndr_push_flags_fn_t)ndr_push_GUID);
-       if (!NT_STATUS_IS_OK(nt_status)) {
-               talloc_free(down_req);
-               ldb_oom(module->ldb);
+       ndr_err = ndr_push_struct_blob(&guid_value, msg, 
+                                      NULL,
+                                      &guid,
+                                      (ndr_push_flags_fn_t)ndr_push_GUID);
+       if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+               ldb_oom(ldb);
                return LDB_ERR_OPERATIONS_ERROR;
        }
-       nt_status = ndr_push_struct_blob(&nmd_value, msg, &nmd,
-                                        (ndr_push_flags_fn_t)ndr_push_replPropertyMetaDataBlob);
-       if (!NT_STATUS_IS_OK(nt_status)) {
-               talloc_free(down_req);
-               ldb_oom(module->ldb);
+       ndr_err = ndr_push_struct_blob(&nmd_value, msg, 
+                                      lp_iconv_convenience(ldb_get_opaque(ldb, "loadparm")),
+                                      &nmd,
+                                      (ndr_push_flags_fn_t)ndr_push_replPropertyMetaDataBlob);
+       if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+               ldb_oom(ldb);
                return LDB_ERR_OPERATIONS_ERROR;
        }
 
@@ -535,32 +409,27 @@ static int replmd_add_originating(struct ldb_module *module,
         */
        ret = ldb_msg_add_value(msg, "objectGUID", &guid_value, NULL);
        if (ret != LDB_SUCCESS) {
-               talloc_free(down_req);
-               ldb_oom(module->ldb);
+               ldb_oom(ldb);
                return LDB_ERR_OPERATIONS_ERROR;
        }
        ret = ldb_msg_add_string(msg, "whenChanged", time_str);
        if (ret != LDB_SUCCESS) {
-               talloc_free(down_req);
-               ldb_oom(module->ldb);
+               ldb_oom(ldb);
                return LDB_ERR_OPERATIONS_ERROR;
        }
-       ret = samdb_msg_add_uint64(module->ldb, msg, msg, "uSNCreated", seq_num);
+       ret = samdb_msg_add_uint64(ldb, msg, msg, "uSNCreated", seq_num);
        if (ret != LDB_SUCCESS) {
-               talloc_free(down_req);
-               ldb_oom(module->ldb);
+               ldb_oom(ldb);
                return LDB_ERR_OPERATIONS_ERROR;
        }
-       ret = samdb_msg_add_uint64(module->ldb, msg, msg, "uSNChanged", seq_num);
+       ret = samdb_msg_add_uint64(ldb, msg, msg, "uSNChanged", seq_num);
        if (ret != LDB_SUCCESS) {
-               talloc_free(down_req);
-               ldb_oom(module->ldb);
+               ldb_oom(ldb);
                return LDB_ERR_OPERATIONS_ERROR;
        }
        ret = ldb_msg_add_value(msg, "replPropertyMetaData", &nmd_value, NULL);
        if (ret != LDB_SUCCESS) {
-               talloc_free(down_req);
-               ldb_oom(module->ldb);
+               ldb_oom(ldb);
                return LDB_ERR_OPERATIONS_ERROR;
        }
 
@@ -569,158 +438,160 @@ static int replmd_add_originating(struct ldb_module *module,
         */
        replmd_ldb_message_sort(msg, schema);
 
-       ldb_set_timeout_from_prev_req(module->ldb, req, down_req);
-
-       /* go on with the call chain */
-       ret = ldb_next_request(module, down_req);
-
-       /* do not free down_req as the call results may be linked to it,
-        * it will be freed when the upper level request get freed */
-       if (ret == LDB_SUCCESS) {
-               req->handle = down_req->handle;
+       ret = ldb_build_add_req(&down_req, ldb, ac,
+                               msg,
+                               req->controls,
+                               ac, replmd_op_callback,
+                               req);
+       if (ret != LDB_SUCCESS) {
+               return ret;
        }
 
-       return ret;
-}
-
-static int replmd_add(struct ldb_module *module, struct ldb_request *req)
-{
-       return replmd_prepare_originating(module, req, req->op.add.message->dn,
-                                         "replmd_add", replmd_add_originating);
+       /* go on with the call chain */
+       return ldb_next_request(module, down_req);
 }
 
-static int replmd_modify_originating(struct ldb_module *module,
-                                    struct ldb_request *req,
-                                    const struct dsdb_schema *schema,
-                                    const struct dsdb_control_current_partition *partition)
+static int replmd_modify(struct ldb_module *module, struct ldb_request *req)
 {
+       struct ldb_context *ldb;
+       struct replmd_replicated_request *ac;
+       const struct dsdb_schema *schema;
        struct ldb_request *down_req;
        struct ldb_message *msg;
        int ret;
        time_t t = time(NULL);
        uint64_t seq_num;
 
-       ldb_debug(module->ldb, LDB_DEBUG_TRACE, "replmd_modify_originating\n");
+       /* do not manipulate our control entries */
+       if (ldb_dn_is_special(req->op.mod.message->dn)) {
+               return ldb_next_request(module, req);
+       }
+
+       ldb = ldb_module_get_ctx(module);
+
+       ldb_debug(ldb, LDB_DEBUG_TRACE, "replmd_modify\n");
+
+       schema = dsdb_get_schema(ldb);
+       if (!schema) {
+               ldb_debug_set(ldb, LDB_DEBUG_FATAL,
+                             "replmd_modify: no dsdb_schema loaded");
+               return LDB_ERR_CONSTRAINT_VIOLATION;
+       }
 
-       down_req = talloc(req, struct ldb_request);
-       if (down_req == NULL) {
+       ac = replmd_ctx_init(module, req);
+       if (!ac) {
                return LDB_ERR_OPERATIONS_ERROR;
        }
 
-       *down_req = *req;
+       ac->schema = schema;
 
        /* we have to copy the message as the caller might have it as a const */
-       down_req->op.mod.message = msg = ldb_msg_copy_shallow(down_req, req->op.mod.message);
+       msg = ldb_msg_copy_shallow(ac, req->op.mod.message);
        if (msg == NULL) {
-               talloc_free(down_req);
+               talloc_free(ac);
                return LDB_ERR_OPERATIONS_ERROR;
        }
 
-       if (add_time_element(msg, "whenChanged", t) != 0) {
-               talloc_free(down_req);
+       /* TODO:
+        * - get the whole old object
+        * - if the old object doesn't exist report an error
+        * - give an error when a readonly attribute should
+        *   be modified
+        * - merge the changed into the old object
+        *   if the caller set values to the same value
+        *   ignore the attribute, return success when no
+        *   attribute was changed
+        * - calculate the new replPropertyMetaData attribute
+        */
+
+       if (add_time_element(msg, "whenChanged", t) != LDB_SUCCESS) {
+               talloc_free(ac);
                return LDB_ERR_OPERATIONS_ERROR;
        }
 
        /* Get a sequence number from the backend */
-       ret = ldb_sequence_number(module->ldb, LDB_SEQ_NEXT, &seq_num);
+       ret = ldb_sequence_number(ldb, LDB_SEQ_NEXT, &seq_num);
        if (ret == LDB_SUCCESS) {
-               if (add_uint64_element(msg, "uSNChanged", seq_num) != 0) {
-                       talloc_free(down_req);
+               if (add_uint64_element(msg, "uSNChanged", seq_num) != LDB_SUCCESS) {
+                       talloc_free(ac);
                        return LDB_ERR_OPERATIONS_ERROR;
                }
        }
 
-       ldb_set_timeout_from_prev_req(module->ldb, req, down_req);
-
-       /* go on with the call chain */
-       ret = ldb_next_request(module, down_req);
-
-       /* do not free down_req as the call results may be linked to it,
-        * it will be freed when the upper level request get freed */
-       if (ret == LDB_SUCCESS) {
-               req->handle = down_req->handle;
-       }
-
-       return ret;
-}
-
-static int replmd_modify(struct ldb_module *module, struct ldb_request *req)
-{
-       return replmd_prepare_originating(module, req, req->op.mod.message->dn,
-                                         "replmd_modify", replmd_modify_originating);
-}
-
-static int replmd_replicated_request_reply_helper(struct replmd_replicated_request *ar, int ret)
-{
-       struct ldb_reply *ares = NULL;
-
-       ar->handle->status = ret;
-       ar->handle->state = LDB_ASYNC_DONE;
+       /* TODO:
+        * - sort the attributes by attid with replmd_ldb_message_sort()
+        * - replace the old object with the newly constructed one
+        */
 
-       if (!ar->orig_req->callback) {
-               return LDB_SUCCESS;
-       }
-       
-       /* we're done and need to report the success to the caller */
-       ares = talloc_zero(ar, struct ldb_reply);
-       if (!ares) {
-               ar->handle->status = LDB_ERR_OPERATIONS_ERROR;
-               ar->handle->state = LDB_ASYNC_DONE;
-               return LDB_ERR_OPERATIONS_ERROR;
+       ret = ldb_build_mod_req(&down_req, ldb, ac,
+                               msg,
+                               req->controls,
+                               ac, replmd_op_callback,
+                               req);
+       if (ret != LDB_SUCCESS) {
+               return ret;
        }
+       talloc_steal(down_req, msg);
 
-       ares->type      = LDB_REPLY_EXTENDED;
-       ares->response  = NULL;
-
-       return ar->orig_req->callback(ar->module->ldb, ar->orig_req->context, ares);
-}
-
-static int replmd_replicated_request_done(struct replmd_replicated_request *ar)
-{
-       return replmd_replicated_request_reply_helper(ar, LDB_SUCCESS);
+       /* go on with the call chain */
+       return ldb_next_request(module, down_req);
 }
 
 static int replmd_replicated_request_error(struct replmd_replicated_request *ar, int ret)
 {
-       return replmd_replicated_request_reply_helper(ar, ret);
+       return ret;
 }
 
 static int replmd_replicated_request_werror(struct replmd_replicated_request *ar, WERROR status)
 {
        int ret = LDB_ERR_OTHER;
        /* TODO: do some error mapping */
-       return replmd_replicated_request_reply_helper(ar, ret);
+       return ret;
 }
 
 static int replmd_replicated_apply_next(struct replmd_replicated_request *ar);
 
-static int replmd_replicated_apply_add_callback(struct ldb_context *ldb,
-                                               void *private_data,
+static int replmd_replicated_apply_add_callback(struct ldb_request *req,
                                                struct ldb_reply *ares)
 {
-#ifdef REPLMD_FULL_ASYNC /* TODO: active this code when ldb support full async code */ 
-       struct replmd_replicated_request *ar = talloc_get_type(private_data,
+       struct ldb_context *ldb;
+       struct replmd_replicated_request *ar = talloc_get_type(req->context,
                                               struct replmd_replicated_request);
+       int ret;
+
+       ldb = ldb_module_get_ctx(ar->module);
 
-       ar->sub.change_ret = ldb_wait(ar->sub.search_req->handle, LDB_WAIT_ALL);
-       if (ar->sub.change_ret != LDB_SUCCESS) {
-               return replmd_replicated_request_error(ar, ar->sub.change_ret);
+       if (!ares) {
+               return ldb_module_done(ar->req, NULL, NULL,
+                                       LDB_ERR_OPERATIONS_ERROR);
+       }
+       if (ares->error != LDB_SUCCESS) {
+               return ldb_module_done(ar->req, ares->controls,
+                                       ares->response, ares->error);
        }
 
-       talloc_free(ar->sub.mem_ctx);
-       ZERO_STRUCT(ar->sub);
+       if (ares->type != LDB_REPLY_DONE) {
+               ldb_set_errstring(ldb, "Invalid reply type\n!");
+               return ldb_module_done(ar->req, NULL, NULL,
+                                       LDB_ERR_OPERATIONS_ERROR);
+       }
 
+       talloc_free(ares);
        ar->index_current++;
 
-       return replmd_replicated_apply_next(ar);
-#else
+       ret = replmd_replicated_apply_next(ar);
+       if (ret != LDB_SUCCESS) {
+               return ldb_module_done(ar->req, NULL, NULL, ret);
+       }
+
        return LDB_SUCCESS;
-#endif
 }
 
 static int replmd_replicated_apply_add(struct replmd_replicated_request *ar)
 {
-       NTSTATUS nt_status;
+       struct ldb_context *ldb;
+       struct ldb_request *change_req;
+       enum ndr_err_code ndr_err;
        struct ldb_message *msg;
        struct replPropertyMetaDataBlob *md;
        struct ldb_val md_value;
@@ -737,10 +608,11 @@ static int replmd_replicated_apply_add(struct replmd_replicated_request *ar)
         *       same name exist
         */
 
+       ldb = ldb_module_get_ctx(ar->module);
        msg = ar->objs->objects[ar->index_current].msg;
        md = ar->objs->objects[ar->index_current].meta_data;
 
-       ret = ldb_sequence_number(ar->module->ldb, LDB_SEQ_NEXT, &seq_num);
+       ret = ldb_sequence_number(ldb, LDB_SEQ_NEXT, &seq_num);
        if (ret != LDB_SUCCESS) {
                return replmd_replicated_request_error(ar, ret);
        }
@@ -755,12 +627,12 @@ static int replmd_replicated_apply_add(struct replmd_replicated_request *ar)
                return replmd_replicated_request_error(ar, ret);
        }
 
-       ret = samdb_msg_add_uint64(ar->module->ldb, msg, msg, "uSNCreated", seq_num);
+       ret = samdb_msg_add_uint64(ldb, msg, msg, "uSNCreated", seq_num);
        if (ret != LDB_SUCCESS) {
                return replmd_replicated_request_error(ar, ret);
        }
 
-       ret = samdb_msg_add_uint64(ar->module->ldb, msg, msg, "uSNChanged", seq_num);
+       ret = samdb_msg_add_uint64(ldb, msg, msg, "uSNChanged", seq_num);
        if (ret != LDB_SUCCESS) {
                return replmd_replicated_request_error(ar, ret);
        }
@@ -771,9 +643,12 @@ static int replmd_replicated_apply_add(struct replmd_replicated_request *ar)
        for (i=0; i < md->ctr.ctr1.count; i++) {
                md->ctr.ctr1.array[i].local_usn = seq_num;
        }
-       nt_status = ndr_push_struct_blob(&md_value, msg, md,
-                                        (ndr_push_flags_fn_t)ndr_push_replPropertyMetaDataBlob);
-       if (!NT_STATUS_IS_OK(nt_status)) {
+       ndr_err = ndr_push_struct_blob(&md_value, msg, 
+                                      lp_iconv_convenience(ldb_get_opaque(ldb, "loadparm")),
+                                      md,
+                                      (ndr_push_flags_fn_t)ndr_push_replPropertyMetaDataBlob);
+       if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+               NTSTATUS nt_status = ndr_map_error2ntstatus(ndr_err);
                return replmd_replicated_request_werror(ar, ntstatus_to_werror(nt_status));
        }
        ret = ldb_msg_add_value(msg, "replPropertyMetaData", &md_value, NULL);
@@ -783,33 +658,17 @@ static int replmd_replicated_apply_add(struct replmd_replicated_request *ar)
 
        replmd_ldb_message_sort(msg, ar->schema);
 
-       ret = ldb_build_add_req(&ar->sub.change_req,
-                               ar->module->ldb,
-                               ar->sub.mem_ctx,
+       ret = ldb_build_add_req(&change_req,
+                               ldb,
+                               ar,
                                msg,
-                               NULL,
+                               ar->controls,
                                ar,
-                               replmd_replicated_apply_add_callback);
-       if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
-
-#ifdef REPLMD_FULL_ASYNC /* TODO: active this code when ldb support full async code */ 
-       return ldb_next_request(ar->module, ar->sub.change_req);
-#else
-       ret = ldb_next_request(ar->module, ar->sub.change_req);
+                               replmd_replicated_apply_add_callback,
+                               ar->req);
        if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
 
-       ar->sub.change_ret = ldb_wait(ar->sub.search_req->handle, LDB_WAIT_ALL);
-       if (ar->sub.change_ret != LDB_SUCCESS) {
-               return replmd_replicated_request_error(ar, ar->sub.change_ret);
-       }
-
-       talloc_free(ar->sub.mem_ctx);
-       ZERO_STRUCT(ar->sub);
-
-       ar->index_current++;
-
-       return LDB_SUCCESS;
-#endif
+       return ldb_next_request(ar->module, change_req);
 }
 
 static int replmd_replPropertyMetaData1_conflict_compare(struct replPropertyMetaData1 *m1,
@@ -821,48 +680,59 @@ static int replmd_replPropertyMetaData1_conflict_compare(struct replPropertyMeta
                return m1->version - m2->version;
        }
 
-       if (m1->orginating_time != m2->orginating_time) {
-               return m1->orginating_time - m2->orginating_time;
+       if (m1->originating_change_time != m2->originating_change_time) {
+               return m1->originating_change_time - m2->originating_change_time;
        }
 
-       ret = GUID_compare(&m1->orginating_invocation_id, &m2->orginating_invocation_id);
+       ret = GUID_compare(&m1->originating_invocation_id, &m2->originating_invocation_id);
        if (ret != 0) {
                return ret;
        }
 
-       return m1->orginating_usn - m2->orginating_usn;
+       return m1->originating_usn - m2->originating_usn;
 }
 
-static int replmd_replicated_apply_merge_callback(struct ldb_context *ldb,
-                                                 void *private_data,
+static int replmd_replicated_apply_merge_callback(struct ldb_request *req,
                                                  struct ldb_reply *ares)
 {
-#ifdef REPLMD_FULL_ASYNC /* TODO: active this code when ldb support full async code */ 
-       struct replmd_replicated_request *ar = talloc_get_type(private_data,
+       struct ldb_context *ldb;
+       struct replmd_replicated_request *ar = talloc_get_type(req->context,
                                               struct replmd_replicated_request);
+       int ret;
 
-       ret = ldb_next_request(ar->module, ar->sub.change_req);
-       if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
+       ldb = ldb_module_get_ctx(ar->module);
 
-       ar->sub.change_ret = ldb_wait(ar->sub.search_req->handle, LDB_WAIT_ALL);
-       if (ar->sub.change_ret != LDB_SUCCESS) {
-               return replmd_replicated_request_error(ar, ar->sub.change_ret);
+       if (!ares) {
+               return ldb_module_done(ar->req, NULL, NULL,
+                                       LDB_ERR_OPERATIONS_ERROR);
+       }
+       if (ares->error != LDB_SUCCESS) {
+               return ldb_module_done(ar->req, ares->controls,
+                                       ares->response, ares->error);
        }
 
-       talloc_free(ar->sub.mem_ctx);
-       ZERO_STRUCT(ar->sub);
+       if (ares->type != LDB_REPLY_DONE) {
+               ldb_set_errstring(ldb, "Invalid reply type\n!");
+               return ldb_module_done(ar->req, NULL, NULL,
+                                       LDB_ERR_OPERATIONS_ERROR);
+       }
 
+       talloc_free(ares);
        ar->index_current++;
 
+       ret = replmd_replicated_apply_next(ar);
+       if (ret != LDB_SUCCESS) {
+               return ldb_module_done(ar->req, NULL, NULL, ret);
+       }
+
        return LDB_SUCCESS;
-#else
-       return LDB_SUCCESS;
-#endif
 }
 
 static int replmd_replicated_apply_merge(struct replmd_replicated_request *ar)
 {
-       NTSTATUS nt_status;
+       struct ldb_context *ldb;
+       struct ldb_request *change_req;
+       enum ndr_err_code ndr_err;
        struct ldb_message *msg;
        struct replPropertyMetaDataBlob *rmd;
        struct replPropertyMetaDataBlob omd;
@@ -874,6 +744,7 @@ static int replmd_replicated_apply_merge(struct replmd_replicated_request *ar)
        uint64_t seq_num;
        int ret;
 
+       ldb = ldb_module_get_ctx(ar->module);
        msg = ar->objs->objects[ar->index_current].msg;
        rmd = ar->objs->objects[ar->index_current].meta_data;
        ZERO_STRUCT(omd);
@@ -882,26 +753,28 @@ static int replmd_replicated_apply_merge(struct replmd_replicated_request *ar)
        /*
         * TODO: add rename conflict handling
         */
-       if (ldb_dn_compare(msg->dn, ar->sub.search_msg->dn) != 0) {
-               ldb_debug_set(ar->module->ldb, LDB_DEBUG_FATAL, "replmd_replicated_apply_merge[%u]: rename not supported",
+       if (ldb_dn_compare(msg->dn, ar->search_msg->dn) != 0) {
+               ldb_debug_set(ldb, LDB_DEBUG_FATAL, "replmd_replicated_apply_merge[%u]: rename not supported",
                              ar->index_current);
-               ldb_debug(ar->module->ldb, LDB_DEBUG_FATAL, "%s => %s\n",
-                         ldb_dn_get_linearized(ar->sub.search_msg->dn),
+               ldb_debug(ldb, LDB_DEBUG_FATAL, "%s => %s\n",
+                         ldb_dn_get_linearized(ar->search_msg->dn),
                          ldb_dn_get_linearized(msg->dn));
                return replmd_replicated_request_werror(ar, WERR_NOT_SUPPORTED);
        }
 
-       ret = ldb_sequence_number(ar->module->ldb, LDB_SEQ_NEXT, &seq_num);
+       ret = ldb_sequence_number(ldb, LDB_SEQ_NEXT, &seq_num);
        if (ret != LDB_SUCCESS) {
                return replmd_replicated_request_error(ar, ret);
        }
 
        /* find existing meta data */
-       omd_value = ldb_msg_find_ldb_val(ar->sub.search_msg, "replPropertyMetaData");
+       omd_value = ldb_msg_find_ldb_val(ar->search_msg, "replPropertyMetaData");
        if (omd_value) {
-               nt_status = ndr_pull_struct_blob(omd_value, ar->sub.mem_ctx, &omd,
-                                                (ndr_pull_flags_fn_t)ndr_pull_replPropertyMetaDataBlob);
-               if (!NT_STATUS_IS_OK(nt_status)) {
+               ndr_err = ndr_pull_struct_blob(omd_value, ar,
+                                              lp_iconv_convenience(ldb_get_opaque(ldb, "loadparm")), &omd,
+                                              (ndr_pull_flags_fn_t)ndr_pull_replPropertyMetaDataBlob);
+               if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+                       NTSTATUS nt_status = ndr_map_error2ntstatus(ndr_err);
                        return replmd_replicated_request_werror(ar, ntstatus_to_werror(nt_status));
                }
 
@@ -913,7 +786,7 @@ static int replmd_replicated_apply_merge(struct replmd_replicated_request *ar)
        ZERO_STRUCT(nmd);
        nmd.version = 1;
        nmd.ctr.ctr1.count = omd.ctr.ctr1.count + rmd->ctr.ctr1.count;
-       nmd.ctr.ctr1.array = talloc_array(ar->sub.mem_ctx,
+       nmd.ctr.ctr1.array = talloc_array(ar,
                                          struct replPropertyMetaData1,
                                          nmd.ctr.ctr1.count);
        if (!nmd.ctr.ctr1.array) return replmd_replicated_request_werror(ar, WERR_NOMEM);
@@ -981,9 +854,12 @@ static int replmd_replicated_apply_merge(struct replmd_replicated_request *ar)
        }
 
        /* create the meta data value */
-       nt_status = ndr_push_struct_blob(&nmd_value, msg, &nmd,
-                                        (ndr_push_flags_fn_t)ndr_push_replPropertyMetaDataBlob);
-       if (!NT_STATUS_IS_OK(nt_status)) {
+       ndr_err = ndr_push_struct_blob(&nmd_value, msg, 
+                                      lp_iconv_convenience(ldb_get_opaque(ldb, "loadparm")),
+                                      &nmd,
+                                      (ndr_push_flags_fn_t)ndr_push_replPropertyMetaDataBlob);
+       if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+               NTSTATUS nt_status = ndr_map_error2ntstatus(ndr_err);
                return replmd_replicated_request_werror(ar, ntstatus_to_werror(nt_status));
        }
 
@@ -991,23 +867,25 @@ static int replmd_replicated_apply_merge(struct replmd_replicated_request *ar)
         * check if some replicated attributes left, otherwise skip the ldb_modify() call
         */
        if (msg->num_elements == 0) {
-               ldb_debug(ar->module->ldb, LDB_DEBUG_TRACE, "replmd_replicated_apply_merge[%u]: skip replace\n",
+               ldb_debug(ldb, LDB_DEBUG_TRACE, "replmd_replicated_apply_merge[%u]: skip replace\n",
                          ar->index_current);
-               goto next_object;
+
+               ar->index_current++;
+               return replmd_replicated_apply_next(ar);
        }
 
-       ldb_debug(ar->module->ldb, LDB_DEBUG_TRACE, "replmd_replicated_apply_merge[%u]: replace %u attributes\n",
+       ldb_debug(ldb, LDB_DEBUG_TRACE, "replmd_replicated_apply_merge[%u]: replace %u attributes\n",
                  ar->index_current, msg->num_elements);
 
        /*
-        * when we now that we'll modify the record, add the whenChanged, uSNChanged
+        * when we know that we'll modify the record, add the whenChanged, uSNChanged
         * and replPopertyMetaData attributes
         */
        ret = ldb_msg_add_string(msg, "whenChanged", ar->objs->objects[ar->index_current].when_changed);
        if (ret != LDB_SUCCESS) {
                return replmd_replicated_request_error(ar, ret);
        }
-       ret = samdb_msg_add_uint64(ar->module->ldb, msg, msg, "uSNChanged", seq_num);
+       ret = samdb_msg_add_uint64(ldb, msg, msg, "uSNChanged", seq_num);
        if (ret != LDB_SUCCESS) {
                return replmd_replicated_request_error(ar, ret);
        }
@@ -1023,150 +901,127 @@ static int replmd_replicated_apply_merge(struct replmd_replicated_request *ar)
                msg->elements[i].flags = LDB_FLAG_MOD_REPLACE;
        }
 
-       ret = ldb_build_mod_req(&ar->sub.change_req,
-                               ar->module->ldb,
-                               ar->sub.mem_ctx,
+       ret = ldb_build_mod_req(&change_req,
+                               ldb,
+                               ar,
                                msg,
-                               NULL,
+                               ar->controls,
                                ar,
-                               replmd_replicated_apply_merge_callback);
-       if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
-
-#ifdef REPLMD_FULL_ASYNC /* TODO: active this code when ldb support full async code */ 
-       return ldb_next_request(ar->module, ar->sub.change_req);
-#else
-       ret = ldb_next_request(ar->module, ar->sub.change_req);
+                               replmd_replicated_apply_merge_callback,
+                               ar->req);
        if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
 
-       ar->sub.change_ret = ldb_wait(ar->sub.search_req->handle, LDB_WAIT_ALL);
-       if (ar->sub.change_ret != LDB_SUCCESS) {
-               return replmd_replicated_request_error(ar, ar->sub.change_ret);
-       }
-
-next_object:
-       talloc_free(ar->sub.mem_ctx);
-       ZERO_STRUCT(ar->sub);
-
-       ar->index_current++;
-
-       return LDB_SUCCESS;
-#endif
+       return ldb_next_request(ar->module, change_req);
 }
 
-static int replmd_replicated_apply_search_callback(struct ldb_context *ldb,
-                                                  void *private_data,
+static int replmd_replicated_apply_search_callback(struct ldb_request *req,
                                                   struct ldb_reply *ares)
 {
-       struct replmd_replicated_request *ar = talloc_get_type(private_data,
+       struct replmd_replicated_request *ar = talloc_get_type(req->context,
                                               struct replmd_replicated_request);
-       bool is_done = false;
+       int ret;
+
+       if (!ares) {
+               return ldb_module_done(ar->req, NULL, NULL,
+                                       LDB_ERR_OPERATIONS_ERROR);
+       }
+       if (ares->error != LDB_SUCCESS &&
+           ares->error != LDB_ERR_NO_SUCH_OBJECT) {
+               return ldb_module_done(ar->req, ares->controls,
+                                       ares->response, ares->error);
+       }
 
        switch (ares->type) {
        case LDB_REPLY_ENTRY:
-               ar->sub.search_msg = talloc_steal(ar->sub.mem_ctx, ares->message);
+               ar->search_msg = talloc_steal(ar, ares->message);
                break;
+
        case LDB_REPLY_REFERRAL:
                /* we ignore referrals */
                break;
-       case LDB_REPLY_EXTENDED:
-       case LDB_REPLY_DONE:
-               is_done = true;
-       }
-
-       talloc_free(ares);
 
-#ifdef REPLMD_FULL_ASYNC /* TODO: active this code when ldb support full async code */ 
-       if (is_done) {
-               ar->sub.search_ret = ldb_wait(ar->sub.search_req->handle, LDB_WAIT_ALL);
-               if (ar->sub.search_ret != LDB_SUCCESS) {
-                       return replmd_replicated_request_error(ar, ar->sub.search_ret);
+       case LDB_REPLY_DONE:
+               if (ar->search_msg != NULL) {
+                       ret = replmd_replicated_apply_merge(ar);
+               } else {
+                       ret = replmd_replicated_apply_add(ar);
                }
-               if (ar->sub.search_msg) {
-                       return replmd_replicated_apply_merge(ar);
+               if (ret != LDB_SUCCESS) {
+                       return ldb_module_done(ar->req, NULL, NULL, ret);
                }
-               return replmd_replicated_apply_add(ar);
        }
-#endif
+
+       talloc_free(ares);
        return LDB_SUCCESS;
 }
 
-static int replmd_replicated_apply_search(struct replmd_replicated_request *ar)
+static int replmd_replicated_uptodate_vector(struct replmd_replicated_request *ar);
+
+static int replmd_replicated_apply_next(struct replmd_replicated_request *ar)
 {
+       struct ldb_context *ldb;
        int ret;
        char *tmp_str;
        char *filter;
+       struct ldb_request *search_req;
+
+       if (ar->index_current >= ar->objs->num_objects) {
+               /* done with it, go to the last op */
+               return replmd_replicated_uptodate_vector(ar);
+       }
+
+       ldb = ldb_module_get_ctx(ar->module);
+       ar->search_msg = NULL;
 
-       tmp_str = ldb_binary_encode(ar->sub.mem_ctx, ar->objs->objects[ar->index_current].guid_value);
+       tmp_str = ldb_binary_encode(ar, ar->objs->objects[ar->index_current].guid_value);
        if (!tmp_str) return replmd_replicated_request_werror(ar, WERR_NOMEM);
 
-       filter = talloc_asprintf(ar->sub.mem_ctx, "(objectGUID=%s)", tmp_str);
+       filter = talloc_asprintf(ar, "(objectGUID=%s)", tmp_str);
        if (!filter) return replmd_replicated_request_werror(ar, WERR_NOMEM);
        talloc_free(tmp_str);
 
-       ret = ldb_build_search_req(&ar->sub.search_req,
-                                  ar->module->ldb,
-                                  ar->sub.mem_ctx,
+       ret = ldb_build_search_req(&search_req,
+                                  ldb,
+                                  ar,
                                   ar->objs->partition_dn,
                                   LDB_SCOPE_SUBTREE,
                                   filter,
                                   NULL,
                                   NULL,
                                   ar,
-                                  replmd_replicated_apply_search_callback);
+                                  replmd_replicated_apply_search_callback,
+                                  ar->req);
        if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
 
-#ifdef REPLMD_FULL_ASYNC /* TODO: active this code when ldb support full async code */ 
-       return ldb_next_request(ar->module, ar->sub.search_req);
-#else
-       ret = ldb_next_request(ar->module, ar->sub.search_req);
-       if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
-
-       ar->sub.search_ret = ldb_wait(ar->sub.search_req->handle, LDB_WAIT_ALL);
-       if (ar->sub.search_ret != LDB_SUCCESS) {
-               return replmd_replicated_request_error(ar, ar->sub.search_ret);
-       }
-       if (ar->sub.search_msg) {
-               return replmd_replicated_apply_merge(ar);
-       }
-
-       return replmd_replicated_apply_add(ar);
-#endif
+       return ldb_next_request(ar->module, search_req);
 }
 
-static int replmd_replicated_apply_next(struct replmd_replicated_request *ar)
-{
-#ifdef REPLMD_FULL_ASYNC /* TODO: active this code when ldb support full async code */ 
-       if (ar->index_current >= ar->objs->num_objects) {
-               return replmd_replicated_uptodate_vector(ar);
-       }
-#endif
-
-       ar->sub.mem_ctx = talloc_new(ar);
-       if (!ar->sub.mem_ctx) return replmd_replicated_request_werror(ar, WERR_NOMEM);
-
-       return replmd_replicated_apply_search(ar);
-}
-
-static int replmd_replicated_uptodate_modify_callback(struct ldb_context *ldb,
-                                                     void *private_data,
+static int replmd_replicated_uptodate_modify_callback(struct ldb_request *req,
                                                      struct ldb_reply *ares)
 {
-#ifdef REPLMD_FULL_ASYNC /* TODO: active this code when ldb support full async code */ 
-       struct replmd_replicated_request *ar = talloc_get_type(private_data,
+       struct ldb_context *ldb;
+       struct replmd_replicated_request *ar = talloc_get_type(req->context,
                                               struct replmd_replicated_request);
+       ldb = ldb_module_get_ctx(ar->module);
 
-       ar->sub.change_ret = ldb_wait(ar->sub.search_req->handle, LDB_WAIT_ALL);
-       if (ar->sub.change_ret != LDB_SUCCESS) {
-               return replmd_replicated_request_error(ar, ar->sub.change_ret);
+       if (!ares) {
+               return ldb_module_done(ar->req, NULL, NULL,
+                                       LDB_ERR_OPERATIONS_ERROR);
+       }
+       if (ares->error != LDB_SUCCESS) {
+               return ldb_module_done(ar->req, ares->controls,
+                                       ares->response, ares->error);
        }
 
-       talloc_free(ar->sub.mem_ctx);
-       ZERO_STRUCT(ar->sub);
+       if (ares->type != LDB_REPLY_DONE) {
+               ldb_set_errstring(ldb, "Invalid reply type\n!");
+               return ldb_module_done(ar->req, NULL, NULL,
+                                       LDB_ERR_OPERATIONS_ERROR);
+       }
 
-       return replmd_replicated_request_done(ar);
-#else
-       return LDB_SUCCESS;
-#endif
+       talloc_free(ares);
+
+       return ldb_module_done(ar->req, NULL, NULL, LDB_SUCCESS);
 }
 
 static int replmd_drsuapi_DsReplicaCursor2_compare(const struct drsuapi_DsReplicaCursor2 *c1,
@@ -1177,7 +1032,9 @@ static int replmd_drsuapi_DsReplicaCursor2_compare(const struct drsuapi_DsReplic
 
 static int replmd_replicated_uptodate_modify(struct replmd_replicated_request *ar)
 {
-       NTSTATUS nt_status;
+       struct ldb_context *ldb;
+       struct ldb_request *change_req;
+       enum ndr_err_code ndr_err;
        struct ldb_message *msg;
        struct replUpToDateVectorBlob ouv;
        const struct ldb_val *ouv_value;
@@ -1197,6 +1054,7 @@ static int replmd_replicated_uptodate_modify(struct replmd_replicated_request *a
        NTTIME now;
        int ret;
 
+       ldb = ldb_module_get_ctx(ar->module);
        ruv = ar->objs->uptodateness_vector;
        ZERO_STRUCT(ouv);
        ouv.version = 2;
@@ -1210,7 +1068,7 @@ static int replmd_replicated_uptodate_modify(struct replmd_replicated_request *a
         * because we will do a modify request and this will increment
         * our highest_usn
         */
-       ret = ldb_sequence_number(ar->module->ldb, LDB_SEQ_NEXT, &seq_num);
+       ret = ldb_sequence_number(ldb, LDB_SEQ_NEXT, &seq_num);
        if (ret != LDB_SUCCESS) {
                return replmd_replicated_request_error(ar, ret);
        }
@@ -1218,11 +1076,13 @@ static int replmd_replicated_uptodate_modify(struct replmd_replicated_request *a
        /*
         * first create the new replUpToDateVector
         */
-       ouv_value = ldb_msg_find_ldb_val(ar->sub.search_msg, "replUpToDateVector");
+       ouv_value = ldb_msg_find_ldb_val(ar->search_msg, "replUpToDateVector");
        if (ouv_value) {
-               nt_status = ndr_pull_struct_blob(ouv_value, ar->sub.mem_ctx, &ouv,
-                                                (ndr_pull_flags_fn_t)ndr_pull_replUpToDateVectorBlob);
-               if (!NT_STATUS_IS_OK(nt_status)) {
+               ndr_err = ndr_pull_struct_blob(ouv_value, ar,
+                                              lp_iconv_convenience(ldb_get_opaque(ldb, "loadparm")), &ouv,
+                                              (ndr_pull_flags_fn_t)ndr_pull_replUpToDateVectorBlob);
+               if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+                       NTSTATUS nt_status = ndr_map_error2ntstatus(ndr_err);
                        return replmd_replicated_request_werror(ar, ntstatus_to_werror(nt_status));
                }
 
@@ -1233,13 +1093,13 @@ static int replmd_replicated_uptodate_modify(struct replmd_replicated_request *a
 
        /*
         * the new uptodateness vector will at least
-        * contain 2 entries, one for the source_dsa and one the local server
+        * contain 1 entry, one for the source_dsa
         *
         * plus optional values from our old vector and the one from the source_dsa
         */
-       nuv.ctr.ctr2.count = 2 + ouv.ctr.ctr2.count;
+       nuv.ctr.ctr2.count = 1 + ouv.ctr.ctr2.count;
        if (ruv) nuv.ctr.ctr2.count += ruv->count;
-       nuv.ctr.ctr2.cursors = talloc_array(ar->sub.mem_ctx,
+       nuv.ctr.ctr2.cursors = talloc_array(ar,
                                            struct drsuapi_DsReplicaCursor2,
                                            nuv.ctr.ctr2.count);
        if (!nuv.ctr.ctr2.cursors) return replmd_replicated_request_werror(ar, WERR_NOMEM);
@@ -1250,10 +1110,19 @@ static int replmd_replicated_uptodate_modify(struct replmd_replicated_request *a
                ni++;
        }
 
+       /* get our invocation_id if we have one already attached to the ldb */
+       our_invocation_id = samdb_ntds_invocation_id(ldb);
+
        /* merge in the source_dsa vector is available */
        for (i=0; (ruv && i < ruv->count); i++) {
                found = false;
 
+               if (our_invocation_id &&
+                   GUID_equal(&ruv->cursors[i].source_dsa_invocation_id,
+                              our_invocation_id)) {
+                       continue;
+               }
+
                for (j=0; j < ni; j++) {
                        if (!GUID_equal(&ruv->cursors[i].source_dsa_invocation_id,
                                        &nuv.ctr.ctr2.cursors[j].source_dsa_invocation_id)) {
@@ -1316,41 +1185,6 @@ static int replmd_replicated_uptodate_modify(struct replmd_replicated_request *a
                ni++;
        }
 
-       /*
-        * merge our own current values if we have a invocation_id already
-        * attached to the ldb
-        */
-       our_invocation_id = samdb_ntds_invocation_id(ar->module->ldb);
-       if (our_invocation_id) {
-               found = false;
-               for (j=0; j < ni; j++) {
-                       if (!GUID_equal(our_invocation_id,
-                                       &nuv.ctr.ctr2.cursors[j].source_dsa_invocation_id)) {
-                               continue;
-                       }
-
-                       found = true;
-
-                       /*
-                        * here we update the highest_usn and last_sync_success time
-                        * because it's our own entry
-                        */
-                       nuv.ctr.ctr2.cursors[j].highest_usn             = seq_num;
-                       nuv.ctr.ctr2.cursors[j].last_sync_success       = now;
-                       break;
-               }
-               if (!found) {
-                       /*
-                        * here we update the highest_usn and last_sync_success time
-                        * because it's our own entry
-                        */
-                       nuv.ctr.ctr2.cursors[ni].source_dsa_invocation_id= *our_invocation_id;
-                       nuv.ctr.ctr2.cursors[ni].highest_usn            = seq_num;
-                       nuv.ctr.ctr2.cursors[ni].last_sync_success      = now;
-                       ni++;
-               }
-       }
-
        /*
         * finally correct the size of the cursors array
         */
@@ -1366,13 +1200,16 @@ static int replmd_replicated_uptodate_modify(struct replmd_replicated_request *a
        /*
         * create the change ldb_message
         */
-       msg = ldb_msg_new(ar->sub.mem_ctx);
+       msg = ldb_msg_new(ar);
        if (!msg) return replmd_replicated_request_werror(ar, WERR_NOMEM);
-       msg->dn = ar->sub.search_msg->dn;
-
-       nt_status = ndr_push_struct_blob(&nuv_value, msg, &nuv,
-                                        (ndr_push_flags_fn_t)ndr_push_replUpToDateVectorBlob);
-       if (!NT_STATUS_IS_OK(nt_status)) {
+       msg->dn = ar->search_msg->dn;
+
+       ndr_err = ndr_push_struct_blob(&nuv_value, msg, 
+                                      lp_iconv_convenience(ldb_get_opaque(ldb, "loadparm")), 
+                                      &nuv,
+                                      (ndr_push_flags_fn_t)ndr_push_replUpToDateVectorBlob);
+       if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+               NTSTATUS nt_status = ndr_map_error2ntstatus(ndr_err);
                return replmd_replicated_request_werror(ar, ntstatus_to_werror(nt_status));
        }
        ret = ldb_msg_add_value(msg, "replUpToDateVector", &nuv_value, &nuv_el);
@@ -1398,17 +1235,18 @@ static int replmd_replicated_uptodate_modify(struct replmd_replicated_request *a
         * first see if we already have a repsFrom value for the current source dsa
         * if so we'll later replace this value
         */
-       orf_el = ldb_msg_find_element(ar->sub.search_msg, "repsFrom");
+       orf_el = ldb_msg_find_element(ar->search_msg, "repsFrom");
        if (orf_el) {
                for (i=0; i < orf_el->num_values; i++) {
                        struct repsFromToBlob *trf;
 
-                       trf = talloc(ar->sub.mem_ctx, struct repsFromToBlob);
+                       trf = talloc(ar, struct repsFromToBlob);
                        if (!trf) return replmd_replicated_request_werror(ar, WERR_NOMEM);
 
-                       nt_status = ndr_pull_struct_blob(&orf_el->values[i], trf, trf,
-                                                        (ndr_pull_flags_fn_t)ndr_pull_repsFromToBlob);
-                       if (!NT_STATUS_IS_OK(nt_status)) {
+                       ndr_err = ndr_pull_struct_blob(&orf_el->values[i], trf, lp_iconv_convenience(ldb_get_opaque(ldb, "loadparm")), trf,
+                                                      (ndr_pull_flags_fn_t)ndr_pull_repsFromToBlob);
+                       if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+                               NTSTATUS nt_status = ndr_map_error2ntstatus(ndr_err);
                                return replmd_replicated_request_werror(ar, ntstatus_to_werror(nt_status));
                        }
 
@@ -1455,9 +1293,12 @@ static int replmd_replicated_uptodate_modify(struct replmd_replicated_request *a
        }
 
        /* we now fill the value which is already attached to ldb_message */
-       nt_status = ndr_push_struct_blob(nrf_value, msg, &nrf,
-                                        (ndr_push_flags_fn_t)ndr_push_repsFromToBlob);
-       if (!NT_STATUS_IS_OK(nt_status)) {
+       ndr_err = ndr_push_struct_blob(nrf_value, msg, 
+                                      lp_iconv_convenience(ldb_get_opaque(ldb, "loadparm")),
+                                      &nrf,
+                                      (ndr_push_flags_fn_t)ndr_push_repsFromToBlob);
+       if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+               NTSTATUS nt_status = ndr_map_error2ntstatus(ndr_err);
                return replmd_replicated_request_werror(ar, ntstatus_to_werror(nt_status));
        }
 
@@ -1468,156 +1309,144 @@ static int replmd_replicated_uptodate_modify(struct replmd_replicated_request *a
        nrf_el->flags = LDB_FLAG_MOD_REPLACE;
 
        /* prepare the ldb_modify() request */
-       ret = ldb_build_mod_req(&ar->sub.change_req,
-                               ar->module->ldb,
-                               ar->sub.mem_ctx,
+       ret = ldb_build_mod_req(&change_req,
+                               ldb,
+                               ar,
                                msg,
-                               NULL,
+                               ar->controls,
                                ar,
-                               replmd_replicated_uptodate_modify_callback);
-       if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
-
-#ifdef REPLMD_FULL_ASYNC /* TODO: active this code when ldb support full async code */ 
-       return ldb_next_request(ar->module, ar->sub.change_req);
-#else
-       ret = ldb_next_request(ar->module, ar->sub.change_req);
+                               replmd_replicated_uptodate_modify_callback,
+                               ar->req);
        if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
 
-       ar->sub.change_ret = ldb_wait(ar->sub.search_req->handle, LDB_WAIT_ALL);
-       if (ar->sub.change_ret != LDB_SUCCESS) {
-               return replmd_replicated_request_error(ar, ar->sub.change_ret);
-       }
-
-       talloc_free(ar->sub.mem_ctx);
-       ZERO_STRUCT(ar->sub);
-
-       return replmd_replicated_request_done(ar);
-#endif
+       return ldb_next_request(ar->module, change_req);
 }
 
-static int replmd_replicated_uptodate_search_callback(struct ldb_context *ldb,
-                                                     void *private_data,
+static int replmd_replicated_uptodate_search_callback(struct ldb_request *req,
                                                      struct ldb_reply *ares)
 {
-       struct replmd_replicated_request *ar = talloc_get_type(private_data,
+       struct replmd_replicated_request *ar = talloc_get_type(req->context,
                                               struct replmd_replicated_request);
-       bool is_done = false;
+       int ret;
+
+       if (!ares) {
+               return ldb_module_done(ar->req, NULL, NULL,
+                                       LDB_ERR_OPERATIONS_ERROR);
+       }
+       if (ares->error != LDB_SUCCESS &&
+           ares->error != LDB_ERR_NO_SUCH_OBJECT) {
+               return ldb_module_done(ar->req, ares->controls,
+                                       ares->response, ares->error);
+       }
 
        switch (ares->type) {
        case LDB_REPLY_ENTRY:
-               ar->sub.search_msg = talloc_steal(ar->sub.mem_ctx, ares->message);
+               ar->search_msg = talloc_steal(ar, ares->message);
                break;
+
        case LDB_REPLY_REFERRAL:
                /* we ignore referrals */
                break;
-       case LDB_REPLY_EXTENDED:
-       case LDB_REPLY_DONE:
-               is_done = true;
-       }
 
-       talloc_free(ares);
-
-#ifdef REPLMD_FULL_ASYNC /* TODO: active this code when ldb support full async code */ 
-       if (is_done) {
-               ar->sub.search_ret = ldb_wait(ar->sub.search_req->handle, LDB_WAIT_ALL);
-               if (ar->sub.search_ret != LDB_SUCCESS) {
-                       return replmd_replicated_request_error(ar, ar->sub.search_ret);
+       case LDB_REPLY_DONE:
+               if (ar->search_msg == NULL) {
+                       ret = replmd_replicated_request_werror(ar, WERR_DS_DRA_INTERNAL_ERROR);
+               } else {
+                       ret = replmd_replicated_uptodate_modify(ar);
                }
-               if (!ar->sub.search_msg) {
-                       return replmd_replicated_request_werror(ar, WERR_DS_DRA_INTERNAL_ERROR);
+               if (ret != LDB_SUCCESS) {
+                       return ldb_module_done(ar->req, NULL, NULL, ret);
                }
-
-               return replmd_replicated_uptodate_modify(ar);
        }
-#endif
+
+       talloc_free(ares);
        return LDB_SUCCESS;
 }
 
-static int replmd_replicated_uptodate_search(struct replmd_replicated_request *ar)
+
+static int replmd_replicated_uptodate_vector(struct replmd_replicated_request *ar)
 {
+       struct ldb_context *ldb;
        int ret;
        static const char *attrs[] = {
                "replUpToDateVector",
                "repsFrom",
                NULL
        };
+       struct ldb_request *search_req;
+
+       ldb = ldb_module_get_ctx(ar->module);
+       ar->search_msg = NULL;
 
-       ret = ldb_build_search_req(&ar->sub.search_req,
-                                  ar->module->ldb,
-                                  ar->sub.mem_ctx,
+       ret = ldb_build_search_req(&search_req,
+                                  ldb,
+                                  ar,
                                   ar->objs->partition_dn,
                                   LDB_SCOPE_BASE,
                                   "(objectClass=*)",
                                   attrs,
                                   NULL,
                                   ar,
-                                  replmd_replicated_uptodate_search_callback);
-       if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
-
-#ifdef REPLMD_FULL_ASYNC /* TODO: active this code when ldb support full async code */ 
-       return ldb_next_request(ar->module, ar->sub.search_req);
-#else
-       ret = ldb_next_request(ar->module, ar->sub.search_req);
+                                  replmd_replicated_uptodate_search_callback,
+                                  ar->req);
        if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
 
-       ar->sub.search_ret = ldb_wait(ar->sub.search_req->handle, LDB_WAIT_ALL);
-       if (ar->sub.search_ret != LDB_SUCCESS) {
-               return replmd_replicated_request_error(ar, ar->sub.search_ret);
-       }
-       if (!ar->sub.search_msg) {
-               return replmd_replicated_request_werror(ar, WERR_DS_DRA_INTERNAL_ERROR);
-       }
-
-       return replmd_replicated_uptodate_modify(ar);
-#endif
-}
-
-static int replmd_replicated_uptodate_vector(struct replmd_replicated_request *ar)
-{
-       ar->sub.mem_ctx = talloc_new(ar);
-       if (!ar->sub.mem_ctx) return replmd_replicated_request_werror(ar, WERR_NOMEM);
-
-       return replmd_replicated_uptodate_search(ar);
+       return ldb_next_request(ar->module, search_req);
 }
 
 static int replmd_extended_replicated_objects(struct ldb_module *module, struct ldb_request *req)
 {
+       struct ldb_context *ldb;
        struct dsdb_extended_replicated_objects *objs;
        struct replmd_replicated_request *ar;
+       struct ldb_control **ctrls;
+       int ret;
+
+       ldb = ldb_module_get_ctx(module);
 
-       ldb_debug(module->ldb, LDB_DEBUG_TRACE, "replmd_extended_replicated_objects\n");
+       ldb_debug(ldb, LDB_DEBUG_TRACE, "replmd_extended_replicated_objects\n");
 
        objs = talloc_get_type(req->op.extended.data, struct dsdb_extended_replicated_objects);
        if (!objs) {
-               ldb_debug(module->ldb, LDB_DEBUG_FATAL, "replmd_extended_replicated_objects: invalid extended data\n");
+               ldb_debug(ldb, LDB_DEBUG_FATAL, "replmd_extended_replicated_objects: invalid extended data\n");
                return LDB_ERR_PROTOCOL_ERROR;
        }
 
        if (objs->version != DSDB_EXTENDED_REPLICATED_OBJECTS_VERSION) {
-               ldb_debug(module->ldb, LDB_DEBUG_FATAL, "replmd_extended_replicated_objects: extended data invalid version [%u != %u]\n",
+               ldb_debug(ldb, LDB_DEBUG_FATAL, "replmd_extended_replicated_objects: extended data invalid version [%u != %u]\n",
                          objs->version, DSDB_EXTENDED_REPLICATED_OBJECTS_VERSION);
                return LDB_ERR_PROTOCOL_ERROR;
        }
 
-       ar = replmd_replicated_init_handle(module, req, objs);
-       if (!ar) {
+       ar = replmd_ctx_init(module, req);
+       if (!ar)
                return LDB_ERR_OPERATIONS_ERROR;
+
+       ar->objs = objs;
+       ar->schema = dsdb_get_schema(ldb);
+       if (!ar->schema) {
+               ldb_debug_set(ldb, LDB_DEBUG_FATAL, "replmd_ctx_init: no loaded schema found\n");
+               talloc_free(ar);
+               return LDB_ERR_CONSTRAINT_VIOLATION;
        }
 
-#ifdef REPLMD_FULL_ASYNC /* TODO: active this code when ldb support full async code */ 
-       return replmd_replicated_apply_next(ar);
-#else
-       while (ar->index_current < ar->objs->num_objects &&
-              req->handle->state != LDB_ASYNC_DONE) { 
-               replmd_replicated_apply_next(ar);
+       ctrls = req->controls;
+
+       if (req->controls) {
+               req->controls = talloc_memdup(ar, req->controls,
+                                             talloc_get_size(req->controls));
+               if (!req->controls) return replmd_replicated_request_werror(ar, WERR_NOMEM);
        }
 
-       if (req->handle->state != LDB_ASYNC_DONE) {
-               replmd_replicated_uptodate_vector(ar);
+       ret = ldb_request_add_control(req, DSDB_CONTROL_REPLICATED_UPDATE_OID, false, NULL);
+       if (ret != LDB_SUCCESS) {
+               return ret;
        }
 
-       return LDB_SUCCESS;
-#endif
+       ar->controls = req->controls;
+       req->controls = ctrls;
+
+       return replmd_replicated_apply_next(ar);
 }
 
 static int replmd_extended(struct ldb_module *module, struct ldb_request *req)
@@ -1629,58 +1458,9 @@ static int replmd_extended(struct ldb_module *module, struct ldb_request *req)
        return ldb_next_request(module, req);
 }
 
-static int replmd_wait_none(struct ldb_handle *handle) {
-       struct replmd_replicated_request *ar;
-    
-       if (!handle || !handle->private_data) {
-               return LDB_ERR_OPERATIONS_ERROR;
-       }
-
-       ar = talloc_get_type(handle->private_data, struct replmd_replicated_request);
-       if (!ar) {
-               return LDB_ERR_OPERATIONS_ERROR;
-       }
-
-       /* we do only sync calls */
-       if (handle->state != LDB_ASYNC_DONE) {
-               return LDB_ERR_OPERATIONS_ERROR;
-       }
-
-       return handle->status;
-}
-
-static int replmd_wait_all(struct ldb_handle *handle) {
-
-       int ret;
-
-       while (handle->state != LDB_ASYNC_DONE) {
-               ret = replmd_wait_none(handle);
-               if (ret != LDB_SUCCESS) {
-                       return ret;
-               }
-       }
-
-       return handle->status;
-}
-
-static int replmd_wait(struct ldb_handle *handle, enum ldb_wait_type type)
-{
-       if (type == LDB_WAIT_ALL) {
-               return replmd_wait_all(handle);
-       } else {
-               return replmd_wait_none(handle);
-       }
-}
-
-static const struct ldb_module_ops replmd_ops = {
+_PUBLIC_ const struct ldb_module_ops ldb_repl_meta_data_module_ops = {
        .name          = "repl_meta_data",
        .add           = replmd_add,
        .modify        = replmd_modify,
        .extended      = replmd_extended,
-       .wait          = replmd_wait
 };
-
-int repl_meta_data_module_init(void)
-{
-       return ldb_register_module(&replmd_ops);
-}