s4:dsdb Remove partition_extended_schema_update_now
[ira/wip.git] / source4 / dsdb / samdb / ldb_modules / partition.c
index 9cae6ab7b538e96165ec7a011655270f674f8e15..c6f6f6a5f32e73e79d50c5b604e451e7998e9983 100644 (file)
@@ -1,14 +1,9 @@
-
 /* 
    Partitions ldb module
 
    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2006
    Copyright (C) Stefan Metzmacher <metze@samba.org> 2007
 
-   * NOTICE: this module is NOT released under the GNU LGPL license as
-   * other ldb code. This module is release under the GNU GPL v3 or
-   * later license.
-
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 3 of the License, or
  *  Author: Stefan Metzmacher
  */
 
-#include "includes.h"
-#include "ldb/include/ldb_includes.h"
-#include "dsdb/samdb/samdb.h"
+#include "dsdb/samdb/ldb_modules/partition.h"
 
-struct partition_private_data {
-       struct dsdb_control_current_partition **partitions;
-       struct ldb_dn **replicate;
+struct part_request {
+       struct ldb_module *module;
+       struct ldb_request *req;
 };
 
 struct partition_context {
        struct ldb_module *module;
-       struct ldb_request *orig_req;
+       struct ldb_request *req;
+       bool got_success;
 
-       struct ldb_request **down_req;
+       struct part_request *part_req;
        int num_requests;
        int finished_requests;
 };
 
-static struct partition_context *partition_init_handle(struct ldb_request *req, struct ldb_module *module)
+static struct partition_context *partition_init_ctx(struct ldb_module *module, struct ldb_request *req)
 {
        struct partition_context *ac;
-       struct ldb_handle *h;
-
-       h = talloc_zero(req, struct ldb_handle);
-       if (h == NULL) {
-               ldb_set_errstring(module->ldb, "Out of Memory");
-               return NULL;
-       }
-
-       h->module = module;
 
-       ac = talloc_zero(h, struct partition_context);
+       ac = talloc_zero(req, struct partition_context);
        if (ac == NULL) {
-               ldb_set_errstring(module->ldb, "Out of Memory");
-               talloc_free(h);
+               ldb_set_errstring(ldb_module_get_ctx(module), "Out of Memory");
                return NULL;
        }
 
-       h->private_data = ac;
-
        ac->module = module;
-       ac->orig_req = req;
-
-       req->handle = h;
+       ac->req = req;
 
        return ac;
 }
 
-static struct ldb_module *make_module_for_next_request(TALLOC_CTX *mem_ctx, 
-                                                      struct ldb_context *ldb,
-                                                      struct ldb_module *module)
+/*
+ *    helper functions to call the next module in chain
+ *    */
+
+int partition_request(struct ldb_module *module, struct ldb_request *request)
 {
-       struct ldb_module *current;
-       static const struct ldb_module_ops ops; /* zero */
-       current = talloc_zero(mem_ctx, struct ldb_module);
-       if (current == NULL) {
-               return module;
+       int ret;
+       switch (request->operation) {
+       case LDB_SEARCH:
+               PARTITION_FIND_OP(module, search);
+               ret = module->ops->search(module, request);
+               break;
+       case LDB_ADD:
+               PARTITION_FIND_OP(module, add);
+               ret = module->ops->add(module, request);
+               break;
+       case LDB_MODIFY:
+               PARTITION_FIND_OP(module, modify);
+               ret = module->ops->modify(module, request);
+               break;
+       case LDB_DELETE:
+               PARTITION_FIND_OP(module, del);
+               ret = module->ops->del(module, request);
+               break;
+       case LDB_RENAME:
+               PARTITION_FIND_OP(module, rename);
+               ret = module->ops->rename(module, request);
+               break;
+       case LDB_EXTENDED:
+               PARTITION_FIND_OP(module, extended);
+               ret = module->ops->extended(module, request);
+               break;
+       default:
+               PARTITION_FIND_OP(module, request);
+               ret = module->ops->request(module, request);
+               break;
        }
-       
-       current->ldb = ldb;
-       current->ops = &ops;
-       current->prev = NULL;
-       current->next = module;
-       return current;
+       if (ret == LDB_SUCCESS) {
+               return ret;
+       }
+       if (!ldb_errstring(ldb_module_get_ctx(module))) {
+               /* Set a default error string, to place the blame somewhere */
+               ldb_asprintf_errstring(ldb_module_get_ctx(module),
+                                       "error in module %s: %s (%d)",
+                                       module->ops->name,
+                                       ldb_strerror(ret), ret);
+       }
+       return ret;
 }
 
-static struct dsdb_control_current_partition *find_partition(struct partition_private_data *data,
-                                                            struct ldb_dn *dn)
+static struct dsdb_partition *find_partition(struct partition_private_data *data,
+                                            struct ldb_dn *dn,
+                                            struct ldb_request *req)
 {
        int i;
+       struct ldb_control *partition_ctrl;
+
+       /* see if the request has the partition DN specified in a
+        * control. The repl_meta_data module can specify this to
+        * ensure that replication happens to the right partition
+        */
+       partition_ctrl = ldb_request_get_control(req, DSDB_CONTROL_CURRENT_PARTITION_OID);
+       if (partition_ctrl) {
+               const struct dsdb_control_current_partition *partition;
+               partition = talloc_get_type(partition_ctrl->data,
+                                           struct dsdb_control_current_partition);
+               if (partition != NULL) {
+                       dn = partition->dn;
+               }
+       }
+
+       if (dn == NULL) {
+               return NULL;
+       }
 
        /* Look at base DN */
        /* Figure out which partition it is under */
-       /* Skip the lot if 'data' isn't here yet (initialistion) */
+       /* Skip the lot if 'data' isn't here yet (initialisation) */
        for (i=0; data && data->partitions && data->partitions[i]; i++) {
-               if (ldb_dn_compare_base(data->partitions[i]->dn, dn) == 0) {
+               if (ldb_dn_compare_base(data->partitions[i]->ctrl->dn, dn) == 0) {
                        return data->partitions[i];
                }
        }
 
        return NULL;
-};
+}
 
 /**
  * fire the caller's callback for every entry, but only send 'done' once.
  */
-static int partition_search_callback(struct ldb_context *ldb, void *context, struct ldb_reply *ares)
+static int partition_req_callback(struct ldb_request *req,
+                                 struct ldb_reply *ares)
 {
        struct partition_context *ac;
+       struct ldb_module *module;
+       struct ldb_request *nreq;
+       int ret;
+       struct partition_private_data *data;
+       struct ldb_control *partition_ctrl;
 
-       ac = talloc_get_type(context, struct partition_context);
+       ac = talloc_get_type(req->context, struct partition_context);
+       data = talloc_get_type(ac->module->private_data, struct partition_private_data);
 
-       if (ares->type == LDB_REPLY_ENTRY) {
-               return ac->orig_req->callback(ldb, ac->orig_req->context, ares);
-       } else {
-               ac->finished_requests++;
-               if (ac->finished_requests == ac->num_requests) {
-                       return ac->orig_req->callback(ldb, ac->orig_req->context, ares);
-               } else {
-                       talloc_free(ares);
-                       return LDB_SUCCESS;
-               }
+       if (!ares) {
+               return ldb_module_done(ac->req, NULL, NULL,
+                                       LDB_ERR_OPERATIONS_ERROR);
        }
-}
 
-/**
- * only fire the 'last' callback, and only for START-TLS for now 
- */
-static int partition_other_callback(struct ldb_context *ldb, void *context, struct ldb_reply *ares)
-{
-       struct partition_context *ac;
-
-       ac = talloc_get_type(context, struct partition_context);
+       partition_ctrl = ldb_request_get_control(req, DSDB_CONTROL_CURRENT_PARTITION_OID);
+       if (partition_ctrl && (ac->num_requests == 1 || ares->type == LDB_REPLY_ENTRY)) {
+               /* If we didn't fan this request out to mulitple partitions,
+                * or this is an individual search result, we can
+                * deterministily tell the caller what partition this was
+                * written to (repl_meta_data likes to know) */
+                       ret = ldb_reply_add_control(ares,
+                                                   DSDB_CONTROL_CURRENT_PARTITION_OID,
+                                                   false, partition_ctrl->data);
+                       if (ret != LDB_SUCCESS) {
+                               return ldb_module_done(ac->req, NULL, NULL,
+                                                      ret);
+                       }
+       }
 
-       if (!ac->orig_req->callback) {
-               talloc_free(ares);
-               return LDB_SUCCESS;
+       if (ares->error != LDB_SUCCESS && !ac->got_success) {
+               return ldb_module_done(ac->req, ares->controls,
+                                       ares->response, ares->error);
        }
 
-       if (!ares 
-           || (ares->type == LDB_REPLY_EXTENDED 
-               && strcmp(ares->response->oid, LDB_EXTENDED_START_TLS_OID))) {
+       switch (ares->type) {
+       case LDB_REPLY_REFERRAL:
+               /* ignore referrals for now */
+               break;
+
+       case LDB_REPLY_ENTRY:
+               if (ac->req->operation != LDB_SEARCH) {
+                       ldb_set_errstring(ldb_module_get_ctx(ac->module),
+                               "partition_req_callback:"
+                               " Unsupported reply type for this request");
+                       return ldb_module_done(ac->req, NULL, NULL,
+                                               LDB_ERR_OPERATIONS_ERROR);
+               }
+               
+               return ldb_module_send_entry(ac->req, ares->message, ares->controls);
+
+       case LDB_REPLY_DONE:
+               if (ares->error == LDB_SUCCESS) {
+                       ac->got_success = true;
+               }
+               if (ac->req->operation == LDB_EXTENDED) {
+                       /* FIXME: check for ares->response, replmd does not fill it ! */
+                       if (ares->response) {
+                               if (strcmp(ares->response->oid, LDB_EXTENDED_START_TLS_OID) != 0) {
+                                       ldb_set_errstring(ldb_module_get_ctx(ac->module),
+                                                         "partition_req_callback:"
+                                                         " Unknown extended reply, "
+                                                         "only supports START_TLS");
+                                       talloc_free(ares);
+                                       return ldb_module_done(ac->req, NULL, NULL,
+                                                               LDB_ERR_OPERATIONS_ERROR);
+                               }
+                       }
+               }
+
                ac->finished_requests++;
                if (ac->finished_requests == ac->num_requests) {
-                       return ac->orig_req->callback(ldb, ac->orig_req->context, ares);
+                       /* this was the last one, call callback */
+                       return ldb_module_done(ac->req, ares->controls,
+                                              ares->response, 
+                                              ac->got_success?LDB_SUCCESS:ares->error);
                }
-               talloc_free(ares);
-               return LDB_SUCCESS;
+
+               /* not the last, now call the next one */
+               module = ac->part_req[ac->finished_requests].module;
+               nreq = ac->part_req[ac->finished_requests].req;
+
+               ret = partition_request(module, nreq);
+               if (ret != LDB_SUCCESS) {
+                       talloc_free(ares);
+                       return ldb_module_done(ac->req, NULL, NULL, ret);
+               }
+
+               break;
        }
-       ldb_set_errstring(ldb, "partition_other_callback: Unknown reply type, only supports START_TLS");
+
        talloc_free(ares);
-       return LDB_ERR_OPERATIONS_ERROR;
+       return LDB_SUCCESS;
 }
 
-
-static int partition_send_request(struct partition_context *ac, 
-                                 struct dsdb_control_current_partition *partition)
+static int partition_prep_request(struct partition_context *ac,
+                                 struct dsdb_partition *partition)
 {
        int ret;
-       struct ldb_module *backend;
        struct ldb_request *req;
 
-       if (partition) {
-               backend = make_module_for_next_request(ac, ac->module->ldb, partition->module);
-       } else {
-               backend = ac->module;
+       ac->part_req = talloc_realloc(ac, ac->part_req,
+                                       struct part_request,
+                                       ac->num_requests + 1);
+       if (ac->part_req == NULL) {
+               ldb_oom(ldb_module_get_ctx(ac->module));
+               return LDB_ERR_OPERATIONS_ERROR;
        }
 
-       ac->down_req = talloc_realloc(ac, ac->down_req, 
-                                       struct ldb_request *, ac->num_requests + 1);
-       if (!ac->down_req) {
-               ldb_oom(ac->module->ldb);
-               return LDB_ERR_OPERATIONS_ERROR;
+       switch (ac->req->operation) {
+       case LDB_SEARCH:
+               ret = ldb_build_search_req_ex(&req, ldb_module_get_ctx(ac->module),
+                                       ac->part_req,
+                                       ac->req->op.search.base,
+                                       ac->req->op.search.scope,
+                                       ac->req->op.search.tree,
+                                       ac->req->op.search.attrs,
+                                       ac->req->controls,
+                                       ac, partition_req_callback,
+                                       ac->req);
+               break;
+       case LDB_ADD:
+               ret = ldb_build_add_req(&req, ldb_module_get_ctx(ac->module), ac->part_req,
+                                       ac->req->op.add.message,
+                                       ac->req->controls,
+                                       ac, partition_req_callback,
+                                       ac->req);
+               break;
+       case LDB_MODIFY:
+               ret = ldb_build_mod_req(&req, ldb_module_get_ctx(ac->module), ac->part_req,
+                                       ac->req->op.mod.message,
+                                       ac->req->controls,
+                                       ac, partition_req_callback,
+                                       ac->req);
+               break;
+       case LDB_DELETE:
+               ret = ldb_build_del_req(&req, ldb_module_get_ctx(ac->module), ac->part_req,
+                                       ac->req->op.del.dn,
+                                       ac->req->controls,
+                                       ac, partition_req_callback,
+                                       ac->req);
+               break;
+       case LDB_RENAME:
+               ret = ldb_build_rename_req(&req, ldb_module_get_ctx(ac->module), ac->part_req,
+                                       ac->req->op.rename.olddn,
+                                       ac->req->op.rename.newdn,
+                                       ac->req->controls,
+                                       ac, partition_req_callback,
+                                       ac->req);
+               break;
+       case LDB_EXTENDED:
+               ret = ldb_build_extended_req(&req, ldb_module_get_ctx(ac->module),
+                                       ac->part_req,
+                                       ac->req->op.extended.oid,
+                                       ac->req->op.extended.data,
+                                       ac->req->controls,
+                                       ac, partition_req_callback,
+                                       ac->req);
+               break;
+       default:
+               ldb_set_errstring(ldb_module_get_ctx(ac->module),
+                                 "Unsupported request type!");
+               ret = LDB_ERR_UNWILLING_TO_PERFORM;
        }
-       req = ac->down_req[ac->num_requests] = talloc(ac, struct ldb_request);
-       if (req == NULL) {
-               ldb_oom(ac->module->ldb);
-               return LDB_ERR_OPERATIONS_ERROR;
+
+       if (ret != LDB_SUCCESS) {
+               return ret;
        }
-       
-       *req = *ac->orig_req; /* copy the request */
 
-       if (req->controls) {
-               req->controls
-                       = talloc_memdup(req,
-                                       ac->orig_req->controls, talloc_get_size(ac->orig_req->controls));
+       ac->part_req[ac->num_requests].req = req;
+
+       if (ac->req->controls) {
+               req->controls = talloc_memdup(req, ac->req->controls,
+                                       talloc_get_size(ac->req->controls));
                if (req->controls == NULL) {
-                       ldb_oom(ac->module->ldb);
+                       ldb_oom(ldb_module_get_ctx(ac->module));
                        return LDB_ERR_OPERATIONS_ERROR;
                }
        }
 
-       if (req->operation == LDB_SEARCH) {
-               /* If the search is for 'more' than this partition,
-                * then change the basedn, so a remote LDAP server
-                * doesn't object */
-               if (partition) {
-                       if (ldb_dn_compare_base(partition->dn, req->op.search.base) != 0) {
-                               req->op.search.base = partition->dn;
+       if (partition) {
+               ac->part_req[ac->num_requests].module = partition->module;
+
+               if (!ldb_request_get_control(req, DSDB_CONTROL_CURRENT_PARTITION_OID)) {
+                       ret = ldb_request_add_control(req,
+                                                     DSDB_CONTROL_CURRENT_PARTITION_OID,
+                                                     false, partition->ctrl);
+                       if (ret != LDB_SUCCESS) {
+                               return ret;
                        }
-               } else {
-                       req->op.search.base = NULL;
                }
-               req->callback = partition_search_callback;
-               req->context = ac;
-       } else {
-               req->callback = partition_other_callback;
-               req->context = ac;
-       }
 
-       if (partition) {
-               ret = ldb_request_add_control(req, DSDB_CONTROL_CURRENT_PARTITION_OID, false, partition);
-               if (ret != LDB_SUCCESS) {
-                       return ret;
+               if (req->operation == LDB_SEARCH) {
+                       /* If the search is for 'more' than this partition,
+                        * then change the basedn, so a remote LDAP server
+                        * doesn't object */
+                       if (ldb_dn_compare_base(partition->ctrl->dn,
+                                               req->op.search.base) != 0) {
+                               req->op.search.base = partition->ctrl->dn;
+                       }
                }
-       }
 
-       /* Spray off search requests the backend */
-       ret = ldb_next_request(backend, req);
-       if (ret != LDB_SUCCESS) {
-               return ret;
+       } else {
+               /* make sure you put the NEXT module here, or
+                * partition_request() will simply loop forever on itself */
+               ac->part_req[ac->num_requests].module = ac->module->next;
        }
 
        ac->num_requests++;
+
        return LDB_SUCCESS;
 }
 
+static int partition_call_first(struct partition_context *ac)
+{
+       return partition_request(ac->part_req[0].module, ac->part_req[0].req);
+}
+
 /**
  * Send a request down to all the partitions
  */
@@ -251,17 +383,19 @@ static int partition_send_all(struct ldb_module *module,
        int i;
        struct partition_private_data *data = talloc_get_type(module->private_data, 
                                                              struct partition_private_data);
-       int ret = partition_send_request(ac, NULL);
+       int ret = partition_prep_request(ac, NULL);
        if (ret != LDB_SUCCESS) {
                return ret;
        }
        for (i=0; data && data->partitions && data->partitions[i]; i++) {
-               ret = partition_send_request(ac, data->partitions[i]);
+               ret = partition_prep_request(ac, data->partitions[i]);
                if (ret != LDB_SUCCESS) {
                        return ret;
                }
        }
-       return LDB_SUCCESS;
+
+       /* fire the first one */
+       return partition_call_first(ac);
 }
 
 /**
@@ -270,21 +404,23 @@ static int partition_send_all(struct ldb_module *module,
  */
 static int partition_replicate(struct ldb_module *module, struct ldb_request *req, struct ldb_dn *dn) 
 {
+       struct partition_context *ac;
        unsigned i;
        int ret;
-       struct dsdb_control_current_partition *partition;
-       struct ldb_module *backend;
+       struct dsdb_partition *partition;
        struct partition_private_data *data = talloc_get_type(module->private_data, 
                                                              struct partition_private_data);
-       
+       if (!data || !data->partitions) {
+               return ldb_next_request(module, req);
+       }
+
        if (req->operation != LDB_SEARCH) {
                /* Is this a special DN, we need to replicate to every backend? */
                for (i=0; data->replicate && data->replicate[i]; i++) {
                        if (ldb_dn_compare(data->replicate[i], 
                                           dn) == 0) {
-                               struct partition_context *ac;
                                
-                               ac = partition_init_handle(req, module);
+                               ac = partition_init_ctx(module, req);
                                if (!ac) {
                                        return LDB_ERR_OPERATIONS_ERROR;
                                }
@@ -297,7 +433,7 @@ static int partition_replicate(struct ldb_module *module, struct ldb_request *re
        /* Otherwise, we need to find the partition to fire it to */
 
        /* Find partition */
-       partition = find_partition(data, dn);
+       partition = find_partition(data, dn, req);
        if (!partition) {
                /*
                 * if we haven't found a matching partition
@@ -310,63 +446,90 @@ static int partition_replicate(struct ldb_module *module, struct ldb_request *re
                return ldb_next_request(module, req);
        }
 
-       backend = make_module_for_next_request(req, module->ldb, partition->module);
-       if (!backend) {
+       ac = partition_init_ctx(module, req);
+       if (!ac) {
                return LDB_ERR_OPERATIONS_ERROR;
        }
 
-       ret = ldb_request_add_control(req, DSDB_CONTROL_CURRENT_PARTITION_OID, false, partition);
+       /* we need to add a control but we never touch the original request */
+       ret = partition_prep_request(ac, partition);
        if (ret != LDB_SUCCESS) {
                return ret;
        }
 
-       /* issue request */
-       return ldb_next_request(backend, req);
+       /* fire the first one */
+       return partition_call_first(ac);
 }
 
 /* search */
 static int partition_search(struct ldb_module *module, struct ldb_request *req)
 {
+       int ret;
        struct ldb_control **saved_controls;
-       
        /* Find backend */
        struct partition_private_data *data = talloc_get_type(module->private_data, 
                                                              struct partition_private_data);
+
        /* issue request */
 
        /* (later) consider if we should be searching multiple
         * partitions (for 'invisible' partition behaviour */
+
        struct ldb_control *search_control = ldb_request_get_control(req, LDB_CONTROL_SEARCH_OPTIONS_OID);
        struct ldb_control *domain_scope_control = ldb_request_get_control(req, LDB_CONTROL_DOMAIN_SCOPE_OID);
        
        struct ldb_search_options_control *search_options = NULL;
+       struct dsdb_partition *p;
+       
+       ret = partition_reload_if_required(module, data);
+       if (ret != LDB_SUCCESS) {
+               return ret;
+       }
+
+       p = find_partition(data, NULL, req);
+       if (p != NULL) {
+               /* the caller specified what partition they want the
+                * search - just pass it on
+                */
+               return ldb_next_request(p->module, req);                
+       }
+
+
        if (search_control) {
                search_options = talloc_get_type(search_control->data, struct ldb_search_options_control);
        }
 
        /* Remove the domain_scope control, so we don't confuse a backend server */
        if (domain_scope_control && !save_controls(domain_scope_control, req, &saved_controls)) {
-               ldb_oom(module->ldb);
+               ldb_oom(ldb_module_get_ctx(module));
                return LDB_ERR_OPERATIONS_ERROR;
        }
 
+       /*
+        * for now pass down the LDB_CONTROL_SEARCH_OPTIONS_OID control
+        * down as uncritical to make windows 2008 dcpromo happy.
+        */
+       if (search_control) {
+               search_control->critical = 0;
+       }
+
        /* TODO:
           Generate referrals (look for a partition under this DN) if we don't have the above control specified
        */
        
        if (search_options && (search_options->search_options & LDB_SEARCH_OPTION_PHANTOM_ROOT)) {
-               int ret, i;
+               int i;
                struct partition_context *ac;
                if ((search_options->search_options & ~LDB_SEARCH_OPTION_PHANTOM_ROOT) == 0) {
                        /* We have processed this flag, so we are done with this control now */
 
                        /* Remove search control, so we don't confuse a backend server */
                        if (search_control && !save_controls(search_control, req, &saved_controls)) {
-                               ldb_oom(module->ldb);
+                               ldb_oom(ldb_module_get_ctx(module));
                                return LDB_ERR_OPERATIONS_ERROR;
                        }
                }
-               ac = partition_init_handle(req, module);
+               ac = partition_init_ctx(module, req);
                if (!ac) {
                        return LDB_ERR_OPERATIONS_ERROR;
                }
@@ -376,13 +539,41 @@ static int partition_search(struct ldb_module *module, struct ldb_request *req)
                        return partition_send_all(module, ac, req);
                }
                for (i=0; data && data->partitions && data->partitions[i]; i++) {
-                       /* Find all partitions under the search base */
-                       if (ldb_dn_compare_base(req->op.search.base, data->partitions[i]->dn) == 0) {
-                               ret = partition_send_request(ac, data->partitions[i]);
+                       bool match = false, stop = false;
+                       /* Find all partitions under the search base 
+                          
+                          we match if:
+
+                             1) the DN we are looking for exactly matches the partition
+                            or
+                             2) the DN we are looking for is a parent of the partition and it isn't
+                                 a scope base search
+                             or
+                             3) the DN we are looking for is a child of the partition
+                        */
+                       if (ldb_dn_compare(data->partitions[i]->ctrl->dn, req->op.search.base) == 0) {
+                               match = true;
+                               if (req->op.search.scope == LDB_SCOPE_BASE) {
+                                       stop = true;
+                               }
+                       }
+                       if (!match && 
+                           (ldb_dn_compare_base(req->op.search.base, data->partitions[i]->ctrl->dn) == 0 &&
+                            req->op.search.scope != LDB_SCOPE_BASE)) {
+                               match = true;
+                       }
+                       if (!match &&
+                           ldb_dn_compare_base(data->partitions[i]->ctrl->dn, req->op.search.base) == 0) {
+                               match = true;
+                               stop = true; /* note that this relies on partition ordering */
+                       }
+                       if (match) {
+                               ret = partition_prep_request(ac, data->partitions[i]);
                                if (ret != LDB_SUCCESS) {
                                        return ret;
                                }
                        }
+                       if (stop) break;
                }
 
                /* Perhaps we didn't match any partitions.  Try the main partition, only */
@@ -390,8 +581,10 @@ static int partition_search(struct ldb_module *module, struct ldb_request *req)
                        talloc_free(ac);
                        return ldb_next_request(module, req);
                }
-               
-               return LDB_SUCCESS;
+
+               /* fire the first one */
+               return partition_call_first(ac);
+
        } else {
                /* Handle this like all other requests */
                if (search_control && (search_options->search_options & ~LDB_SEARCH_OPTION_PHANTOM_ROOT) == 0) {
@@ -399,7 +592,7 @@ static int partition_search(struct ldb_module *module, struct ldb_request *req)
 
                        /* Remove search control, so we don't confuse a backend server */
                        if (search_control && !save_controls(search_control, req, &saved_controls)) {
-                               ldb_oom(module->ldb);
+                               ldb_oom(ldb_module_get_ctx(module));
                                return LDB_ERR_OPERATIONS_ERROR;
                        }
                }
@@ -429,48 +622,31 @@ static int partition_delete(struct ldb_module *module, struct ldb_request *req)
 /* rename */
 static int partition_rename(struct ldb_module *module, struct ldb_request *req)
 {
-       int i, matched = -1;
        /* Find backend */
-       struct dsdb_control_current_partition *backend, *backend2;
+       struct dsdb_partition *backend, *backend2;
        
        struct partition_private_data *data = talloc_get_type(module->private_data, 
                                                              struct partition_private_data);
 
-       /* Skip the lot if 'data' isn't here yet (initialistion) */
+       /* Skip the lot if 'data' isn't here yet (initialisation) */
        if (!data) {
                return LDB_ERR_OPERATIONS_ERROR;
        }
 
-       backend = find_partition(data, req->op.rename.olddn);
-       backend2 = find_partition(data, req->op.rename.newdn);
+       backend = find_partition(data, req->op.rename.olddn, req);
+       backend2 = find_partition(data, req->op.rename.newdn, req);
 
        if ((backend && !backend2) || (!backend && backend2)) {
                return LDB_ERR_AFFECTS_MULTIPLE_DSAS;
        }
 
        if (backend != backend2) {
-               ldb_asprintf_errstring(module->ldb
+               ldb_asprintf_errstring(ldb_module_get_ctx(module)
                                       "Cannot rename from %s in %s to %s in %s: %s",
                                       ldb_dn_get_linearized(req->op.rename.olddn),
-                                      ldb_dn_get_linearized(backend->dn),
-                                      ldb_dn_get_linearized(req->op.rename.newdn),
-                                      ldb_dn_get_linearized(backend2->dn),
-                                      ldb_strerror(LDB_ERR_AFFECTS_MULTIPLE_DSAS));
-               return LDB_ERR_AFFECTS_MULTIPLE_DSAS;
-       }
-
-       for (i=0; data && data->partitions && data->partitions[i]; i++) {
-               if (ldb_dn_compare_base(req->op.rename.olddn, data->partitions[i]->dn) == 0) {
-                       matched = i;
-               }
-       }
-
-       if (matched > 0) {
-               ldb_asprintf_errstring(module->ldb, 
-                                      "Cannot rename from %s to %s, subtree rename would cross partition %s: %s",
-                                      ldb_dn_get_linearized(req->op.rename.olddn),
+                                      ldb_dn_get_linearized(backend->ctrl->dn),
                                       ldb_dn_get_linearized(req->op.rename.newdn),
-                                      ldb_dn_get_linearized(data->partitions[matched]->dn),
+                                      ldb_dn_get_linearized(backend2->ctrl->dn),
                                       ldb_strerror(LDB_ERR_AFFECTS_MULTIPLE_DSAS));
                return LDB_ERR_AFFECTS_MULTIPLE_DSAS;
        }
@@ -486,91 +662,179 @@ static int partition_start_trans(struct ldb_module *module)
                                                              struct partition_private_data);
        /* Look at base DN */
        /* Figure out which partition it is under */
-       /* Skip the lot if 'data' isn't here yet (initialistion) */
+       /* Skip the lot if 'data' isn't here yet (initialization) */
        ret = ldb_next_start_trans(module);
        if (ret != LDB_SUCCESS) {
                return ret;
        }
 
+       ret = partition_reload_if_required(module, data);
+       if (ret != LDB_SUCCESS) {
+               return ret;
+       }
+
        for (i=0; data && data->partitions && data->partitions[i]; i++) {
-               struct ldb_module *next = make_module_for_next_request(module, module->ldb, data->partitions[i]->module);
+               struct ldb_module *next = data->partitions[i]->module;
+               PARTITION_FIND_OP(next, start_transaction);
 
-               ret = ldb_next_start_trans(next);
-               talloc_free(next);
+               ret = next->ops->start_transaction(next);
                if (ret != LDB_SUCCESS) {
                        /* Back it out, if it fails on one */
                        for (i--; i >= 0; i--) {
-                               next = make_module_for_next_request(module, module->ldb, data->partitions[i]->module);
-                               ldb_next_del_trans(next);
-                               talloc_free(next);
+                               next = data->partitions[i]->module;
+                               PARTITION_FIND_OP(next, del_transaction);
+
+                               next->ops->del_transaction(next);
                        }
+                       ldb_next_del_trans(module);
                        return ret;
                }
        }
+
+       data->in_transaction++;
+
        return LDB_SUCCESS;
 }
 
-/* end a transaction */
-static int partition_end_trans(struct ldb_module *module)
+/* prepare for a commit */
+static int partition_prepare_commit(struct ldb_module *module)
 {
-       int i, ret, ret2 = LDB_SUCCESS;
+       int i;
        struct partition_private_data *data = talloc_get_type(module->private_data, 
                                                              struct partition_private_data);
-       ret = ldb_next_end_trans(module);
-       if (ret != LDB_SUCCESS) {
-               return ret;
-       }
 
-       /* Look at base DN */
-       /* Figure out which partition it is under */
-       /* Skip the lot if 'data' isn't here yet (initialistion) */
        for (i=0; data && data->partitions && data->partitions[i]; i++) {
-               struct ldb_module *next = make_module_for_next_request(module, module->ldb, data->partitions[i]->module);
-               
-               ret = ldb_next_end_trans(next);
-               talloc_free(next);
+               struct ldb_module *next_prepare = data->partitions[i]->module;
+               int ret;
+
+               PARTITION_FIND_OP_NOERROR(next_prepare, prepare_commit);
+               if (next_prepare == NULL) {
+                       continue;
+               }
+
+               ret = next_prepare->ops->prepare_commit(next_prepare);
                if (ret != LDB_SUCCESS) {
-                       ret2 = ret;
+                       return ret;
                }
        }
 
-       if (ret != LDB_SUCCESS) {
-               /* Back it out, if it fails on one */
-               for (i=0; data && data->partitions && data->partitions[i]; i++) {
-                       struct ldb_module *next = make_module_for_next_request(module, module->ldb, data->partitions[i]->module);
-                       ldb_next_del_trans(next);
-                       talloc_free(next);
+       return ldb_next_prepare_commit(module);
+}
+
+
+/* end a transaction */
+static int partition_end_trans(struct ldb_module *module)
+{
+       int i;
+       struct partition_private_data *data = talloc_get_type(module->private_data, 
+                                                             struct partition_private_data);
+       for (i=0; data && data->partitions && data->partitions[i]; i++) {
+               struct ldb_module *next_end = data->partitions[i]->module;
+               int ret;
+
+               PARTITION_FIND_OP(next_end, end_transaction);
+
+               ret = next_end->ops->end_transaction(next_end);
+               if (ret != LDB_SUCCESS) {
+                       return ret;
                }
        }
-       return ret;
+
+       if (data->in_transaction == 0) {
+               DEBUG(0,("partition end transaction mismatch\n"));
+               return LDB_ERR_OPERATIONS_ERROR;
+       }
+       data->in_transaction--;
+
+       return ldb_next_end_trans(module);
 }
 
 /* delete a transaction */
 static int partition_del_trans(struct ldb_module *module)
 {
-       int i, ret, ret2 = LDB_SUCCESS;
+       int i, ret, final_ret = LDB_SUCCESS;
        struct partition_private_data *data = talloc_get_type(module->private_data, 
                                                              struct partition_private_data);
+       for (i=0; data && data->partitions && data->partitions[i]; i++) {
+               struct ldb_module *next = data->partitions[i]->module;
+               PARTITION_FIND_OP(next, del_transaction);
+
+               ret = next->ops->del_transaction(next);
+               if (ret != LDB_SUCCESS) {
+                       final_ret = ret;
+               }
+       }       
+
+       if (data->in_transaction == 0) {
+               DEBUG(0,("partition del transaction mismatch\n"));
+               return LDB_ERR_OPERATIONS_ERROR;
+       }
+       data->in_transaction--;
+
        ret = ldb_next_del_trans(module);
        if (ret != LDB_SUCCESS) {
-               ret2 = ret;
+               final_ret = ret;
        }
+       return final_ret;
+}
 
-       /* Look at base DN */
-       /* Figure out which partition it is under */
-       /* Skip the lot if 'data' isn't here yet (initialistion) */
-       for (i=0; data && data->partitions && data->partitions[i]; i++) {
-               struct ldb_module *next = make_module_for_next_request(module, module->ldb, data->partitions[i]->module);
-               
-               ret = ldb_next_del_trans(next);
-               talloc_free(next);
-               if (ret != LDB_SUCCESS) {
-                       ret2 = ret;
-               }
+int partition_primary_sequence_number(struct ldb_module *module, TALLOC_CTX *mem_ctx, 
+                                    enum ldb_sequence_type type, uint64_t *seq_number) 
+{
+       int ret;
+       struct ldb_result *res;
+       struct ldb_seqnum_request *tseq;
+       struct ldb_request *treq;
+       struct ldb_seqnum_result *seqr;
+       res = talloc_zero(mem_ctx, struct ldb_result);
+       if (res == NULL) {
+               return LDB_ERR_OPERATIONS_ERROR;
+       }
+       tseq = talloc_zero(res, struct ldb_seqnum_request);
+       if (tseq == NULL) {
+               talloc_free(res);
+               return LDB_ERR_OPERATIONS_ERROR;
+       }
+       tseq->type = type;
+       
+       ret = ldb_build_extended_req(&treq, ldb_module_get_ctx(module), res,
+                                    LDB_EXTENDED_SEQUENCE_NUMBER,
+                                    tseq,
+                                    NULL,
+                                    res,
+                                    ldb_extended_default_callback,
+                                    NULL);
+       if (ret != LDB_SUCCESS) {
+               talloc_free(res);
+               return ret;
+       }
+       
+       ret = ldb_next_request(module, treq);
+       if (ret != LDB_SUCCESS) {
+               talloc_free(res);
+               return ret;
+       }
+       ret = ldb_wait(treq->handle, LDB_WAIT_ALL);
+       if (ret != LDB_SUCCESS) {
+               talloc_free(res);
+               return ret;
+       }
+       
+       seqr = talloc_get_type(res->extended->data,
+                              struct ldb_seqnum_result);
+       if (seqr->flags & LDB_SEQ_TIMESTAMP_SEQUENCE) {
+               ret = LDB_ERR_OPERATIONS_ERROR;
+               ldb_set_errstring(ldb_module_get_ctx(module), "Primary backend in partitions module returned a timestamp based seq number (must return a normal number)");
+               talloc_free(res);
+               return ret;
+       } else {
+               *seq_number = seqr->seq_num;
        }
-       return ret2;
+       talloc_free(res);
+       return LDB_SUCCESS;
 }
 
+/* FIXME: This function is still semi-async */
 static int partition_sequence_number(struct ldb_module *module, struct ldb_request *req)
 {
        int i, ret;
@@ -579,509 +843,271 @@ static int partition_sequence_number(struct ldb_module *module, struct ldb_reque
        uint64_t timestamp = 0;
        struct partition_private_data *data = talloc_get_type(module->private_data, 
                                                              struct partition_private_data);
+       struct ldb_seqnum_request *seq;
+       struct ldb_seqnum_result *seqr;
+       struct ldb_request *treq;
+       struct ldb_seqnum_request *tseq;
+       struct ldb_seqnum_result *tseqr;
+       struct ldb_extended *ext;
+       struct ldb_result *res;
+       struct dsdb_partition *p;
+
+       p = find_partition(data, NULL, req);
+       if (p != NULL) {
+               /* the caller specified what partition they want the
+                * sequence number operation on - just pass it on
+                */
+               return ldb_next_request(p->module, req);                
+       }
 
-       switch (req->op.seq_num.type) {
+       seq = talloc_get_type(req->op.extended.data, struct ldb_seqnum_request);
+
+       switch (seq->type) {
        case LDB_SEQ_NEXT:
        case LDB_SEQ_HIGHEST_SEQ:
-               ret = ldb_next_request(module, req);
+
+               ret = partition_primary_sequence_number(module, req, seq->type, &seq_number);
                if (ret != LDB_SUCCESS) {
                        return ret;
                }
-               if (req->op.seq_num.flags & LDB_SEQ_TIMESTAMP_SEQUENCE) {
-                       timestamp_sequence = req->op.seq_num.seq_num;
-               } else {
-                       seq_number = seq_number + req->op.seq_num.seq_num;
-               }
 
-               /* Look at base DN */
-               /* Figure out which partition it is under */
-               /* Skip the lot if 'data' isn't here yet (initialistion) */
+               /* Skip the lot if 'data' isn't here yet (initialisation) */
                for (i=0; data && data->partitions && data->partitions[i]; i++) {
-                       struct ldb_module *next = make_module_for_next_request(req, module->ldb, data->partitions[i]->module);
-                       
-                       ret = ldb_request_add_control(req, DSDB_CONTROL_CURRENT_PARTITION_OID, false, data->partitions[i]);
+
+                       res = talloc_zero(req, struct ldb_result);
+                       if (res == NULL) {
+                               return LDB_ERR_OPERATIONS_ERROR;
+                       }
+                       tseq = talloc_zero(res, struct ldb_seqnum_request);
+                       if (tseq == NULL) {
+                               talloc_free(res);
+                               return LDB_ERR_OPERATIONS_ERROR;
+                       }
+                       tseq->type = seq->type;
+
+                       ret = ldb_build_extended_req(&treq, ldb_module_get_ctx(module), res,
+                                                    LDB_EXTENDED_SEQUENCE_NUMBER,
+                                                    tseq,
+                                                    NULL,
+                                                    res,
+                                                    ldb_extended_default_callback,
+                                                    NULL);
                        if (ret != LDB_SUCCESS) {
+                               talloc_free(res);
                                return ret;
                        }
 
-                       ret = ldb_next_request(next, req);
-                       talloc_free(next);
+                       if (!ldb_request_get_control(treq, DSDB_CONTROL_CURRENT_PARTITION_OID)) {
+                               ret = ldb_request_add_control(treq,
+                                                             DSDB_CONTROL_CURRENT_PARTITION_OID,
+                                                             false, data->partitions[i]->ctrl);
+                               if (ret != LDB_SUCCESS) {
+                                       talloc_free(res);
+                                       return ret;
+                               }
+                       }
+
+                       ret = partition_request(data->partitions[i]->module, treq);
                        if (ret != LDB_SUCCESS) {
+                               talloc_free(res);
                                return ret;
                        }
-                       if (req->op.seq_num.flags & LDB_SEQ_TIMESTAMP_SEQUENCE) {
-                               timestamp_sequence = MAX(timestamp_sequence, req->op.seq_num.seq_num);
+                       ret = ldb_wait(treq->handle, LDB_WAIT_ALL);
+                       if (ret != LDB_SUCCESS) {
+                               talloc_free(res);
+                               return ret;
+                       }
+                       tseqr = talloc_get_type(res->extended->data,
+                                               struct ldb_seqnum_result);
+                       if (tseqr->flags & LDB_SEQ_TIMESTAMP_SEQUENCE) {
+                               timestamp_sequence = MAX(timestamp_sequence,
+                                                        tseqr->seq_num);
                        } else {
-                               seq_number = seq_number + req->op.seq_num.seq_num;
+                               seq_number += tseqr->seq_num;
                        }
+                       talloc_free(res);
                }
-               /* fall though */
+               /* fall through */
        case LDB_SEQ_HIGHEST_TIMESTAMP:
-       {
-               struct ldb_request *date_req = talloc(req, struct ldb_request);
-               if (!date_req) {
+
+               res = talloc_zero(req, struct ldb_result);
+               if (res == NULL) {
                        return LDB_ERR_OPERATIONS_ERROR;
                }
-               *date_req = *req;
-               date_req->op.seq_num.flags = LDB_SEQ_HIGHEST_TIMESTAMP;
 
-               ret = ldb_next_request(module, date_req);
+               tseq = talloc_zero(res, struct ldb_seqnum_request);
+               if (tseq == NULL) {
+                       talloc_free(res);
+                       return LDB_ERR_OPERATIONS_ERROR;
+               }
+               tseq->type = LDB_SEQ_HIGHEST_TIMESTAMP;
+
+               ret = ldb_build_extended_req(&treq, ldb_module_get_ctx(module), res,
+                                            LDB_EXTENDED_SEQUENCE_NUMBER,
+                                            tseq,
+                                            NULL,
+                                            res,
+                                            ldb_extended_default_callback,
+                                            NULL);
                if (ret != LDB_SUCCESS) {
+                       talloc_free(res);
                        return ret;
                }
-               timestamp = date_req->op.seq_num.seq_num;
-               
-               /* Look at base DN */
-               /* Figure out which partition it is under */
-               /* Skip the lot if 'data' isn't here yet (initialistion) */
+
+               ret = ldb_next_request(module, treq);
+               if (ret != LDB_SUCCESS) {
+                       talloc_free(res);
+                       return ret;
+               }
+               ret = ldb_wait(treq->handle, LDB_WAIT_ALL);
+               if (ret != LDB_SUCCESS) {
+                       talloc_free(res);
+                       return ret;
+               }
+
+               tseqr = talloc_get_type(res->extended->data,
+                                          struct ldb_seqnum_result);
+               timestamp = tseqr->seq_num;
+
+               talloc_free(res);
+
+               /* Skip the lot if 'data' isn't here yet (initialisation) */
                for (i=0; data && data->partitions && data->partitions[i]; i++) {
-                       struct ldb_module *next = make_module_for_next_request(req, module->ldb, data->partitions[i]->module);
-                       
-                       ret = ldb_next_request(next, date_req);
-                       talloc_free(next);
+
+                       res = talloc_zero(req, struct ldb_result);
+                       if (res == NULL) {
+                               return LDB_ERR_OPERATIONS_ERROR;
+                       }
+
+                       tseq = talloc_zero(res, struct ldb_seqnum_request);
+                       if (tseq == NULL) {
+                               talloc_free(res);
+                               return LDB_ERR_OPERATIONS_ERROR;
+                       }
+                       tseq->type = LDB_SEQ_HIGHEST_TIMESTAMP;
+
+                       ret = ldb_build_extended_req(&treq, ldb_module_get_ctx(module), res,
+                                                    LDB_EXTENDED_SEQUENCE_NUMBER,
+                                                    tseq,
+                                                    NULL,
+                                                    res,
+                                                    ldb_extended_default_callback,
+                                                    NULL);
+                       if (ret != LDB_SUCCESS) {
+                               talloc_free(res);
+                               return ret;
+                       }
+
+                       if (!ldb_request_get_control(treq, DSDB_CONTROL_CURRENT_PARTITION_OID)) {
+                               ret = ldb_request_add_control(treq,
+                                                             DSDB_CONTROL_CURRENT_PARTITION_OID,
+                                                             false, data->partitions[i]->ctrl);
+                               if (ret != LDB_SUCCESS) {
+                                       talloc_free(res);
+                                       return ret;
+                               }
+                       }
+
+                       ret = partition_request(data->partitions[i]->module, treq);
+                       if (ret != LDB_SUCCESS) {
+                               talloc_free(res);
+                               return ret;
+                       }
+                       ret = ldb_wait(treq->handle, LDB_WAIT_ALL);
                        if (ret != LDB_SUCCESS) {
+                               talloc_free(res);
                                return ret;
                        }
-                       timestamp = MAX(timestamp, date_req->op.seq_num.seq_num);
+
+                       tseqr = talloc_get_type(res->extended->data,
+                                                 struct ldb_seqnum_result);
+                       timestamp = MAX(timestamp, tseqr->seq_num);
+
+                       talloc_free(res);
                }
+
                break;
        }
+
+       ext = talloc_zero(req, struct ldb_extended);
+       if (!ext) {
+               return LDB_ERR_OPERATIONS_ERROR;
+       }
+       seqr = talloc_zero(ext, struct ldb_seqnum_result);
+       if (seqr == NULL) {
+               talloc_free(ext);
+               return LDB_ERR_OPERATIONS_ERROR;
        }
+       ext->oid = LDB_EXTENDED_SEQUENCE_NUMBER;
+       ext->data = seqr;
 
-       switch (req->op.seq_num.flags) {
+       switch (seq->type) {
        case LDB_SEQ_NEXT:
        case LDB_SEQ_HIGHEST_SEQ:
-               
-               req->op.seq_num.flags = 0;
 
                /* Has someone above set a timebase sequence? */
                if (timestamp_sequence) {
-                       req->op.seq_num.seq_num = (((unsigned long long)timestamp << 24) | (seq_number & 0xFFFFFF));
+                       seqr->seq_num = (((unsigned long long)timestamp << 24) | (seq_number & 0xFFFFFF));
                } else {
-                       req->op.seq_num.seq_num = seq_number;
+                       seqr->seq_num = seq_number;
                }
 
-               if (timestamp_sequence > req->op.seq_num.seq_num) {
-                       req->op.seq_num.seq_num = timestamp_sequence;
-                       req->op.seq_num.flags |= LDB_SEQ_TIMESTAMP_SEQUENCE;
+               if (timestamp_sequence > seqr->seq_num) {
+                       seqr->seq_num = timestamp_sequence;
+                       seqr->flags |= LDB_SEQ_TIMESTAMP_SEQUENCE;
                }
 
-               req->op.seq_num.flags |= LDB_SEQ_GLOBAL_SEQUENCE;
+               seqr->flags |= LDB_SEQ_GLOBAL_SEQUENCE;
                break;
        case LDB_SEQ_HIGHEST_TIMESTAMP:
-               req->op.seq_num.seq_num = timestamp;
+               seqr->seq_num = timestamp;
                break;
        }
 
-       switch (req->op.seq_num.flags) {
-       case LDB_SEQ_NEXT:
-               req->op.seq_num.seq_num++;
-       }
-       return LDB_SUCCESS;
-}
-
-static int partition_extended_replicated_objects(struct ldb_module *module, struct ldb_request *req)
-{
-       struct dsdb_extended_replicated_objects *ext;
-
-       ext = talloc_get_type(req->op.extended.data, struct dsdb_extended_replicated_objects);
-       if (!ext) {
-               ldb_debug(module->ldb, LDB_DEBUG_FATAL, "partition_extended_replicated_objects: invalid extended data\n");
-               return LDB_ERR_PROTOCOL_ERROR;
-       }
-
-       if (ext->version != DSDB_EXTENDED_REPLICATED_OBJECTS_VERSION) {
-               ldb_debug(module->ldb, LDB_DEBUG_FATAL, "partition_extended_replicated_objects: extended data invalid version [%u != %u]\n",
-                         ext->version, DSDB_EXTENDED_REPLICATED_OBJECTS_VERSION);
-               return LDB_ERR_PROTOCOL_ERROR;
+       if (seq->type == LDB_SEQ_NEXT) {
+               seqr->seq_num++;
        }
 
-       return partition_replicate(module, req, ext->partition_dn);
+       /* send request done */
+       return ldb_module_done(req, NULL, ext, LDB_SUCCESS);
 }
 
-static int partition_extended_schema_update_now(struct ldb_module *module, struct ldb_request *req)
+/* extended */
+static int partition_extended(struct ldb_module *module, struct ldb_request *req)
 {
-       struct dsdb_control_current_partition *partition;
        struct partition_private_data *data;
-       struct ldb_dn *schema_dn;
        struct partition_context *ac;
-       struct ldb_module *backend;
        int ret;
 
-       schema_dn = talloc_get_type(req->op.extended.data, struct ldb_dn);
-       if (!schema_dn) {
-               ldb_debug(module->ldb, LDB_DEBUG_FATAL, "partition_extended: invalid extended data\n");
-               return LDB_ERR_PROTOCOL_ERROR;
-       }
-
        data = talloc_get_type(module->private_data, struct partition_private_data);
        if (!data) {
-               return LDB_ERR_OPERATIONS_ERROR;
-       }
-       
-       partition = find_partition( data, schema_dn );
-       if (!partition) {
                return ldb_next_request(module, req);
        }
 
-       ac = partition_init_handle(req, module);
-       if (!ac) {
-               return LDB_ERR_OPERATIONS_ERROR;
-       }
-
-       backend = make_module_for_next_request(req, module->ldb, partition->module);
-       if (!backend) {
-               return LDB_ERR_OPERATIONS_ERROR;
-       }
-
-       ret = ldb_request_add_control(req, DSDB_CONTROL_CURRENT_PARTITION_OID, false, partition);
+       ret = partition_reload_if_required(module, data);
        if (ret != LDB_SUCCESS) {
                return ret;
        }
-
-       return ldb_next_request(backend, req);
-}
-
-
-/* extended */
-static int partition_extended(struct ldb_module *module, struct ldb_request *req)
-{
-       struct partition_context *ac;
-
-       if (strcmp(req->op.extended.oid, DSDB_EXTENDED_REPLICATED_OBJECTS_OID) == 0) {
-               return partition_extended_replicated_objects(module, req);
+       
+       if (strcmp(req->op.extended.oid, LDB_EXTENDED_SEQUENCE_NUMBER) == 0) {
+               return partition_sequence_number(module, req);
        }
 
-       /* forward schemaUpdateNow operation to schema_fsmo module*/
-       if (strcmp(req->op.extended.oid, DSDB_EXTENDED_SCHEMA_UPDATE_NOW_OID) == 0) {
-               return partition_extended_schema_update_now( module, req );
-       }       
+       if (strcmp(req->op.extended.oid, DSDB_EXTENDED_CREATE_PARTITION_OID) == 0) {
+               return partition_create(module, req);
+       }
 
        /* 
         * as the extended operation has no dn
         * we need to send it to all partitions
         */
 
-       ac = partition_init_handle(req, module);
+       ac = partition_init_ctx(module, req);
        if (!ac) {
                return LDB_ERR_OPERATIONS_ERROR;
        }
-                       
-       return partition_send_all(module, ac, req);
-}
-
-static int sort_compare(void *void1,
-                       void *void2, void *opaque)
-{
-       struct dsdb_control_current_partition **pp1 = 
-               (struct dsdb_control_current_partition **)void1;
-       struct dsdb_control_current_partition **pp2 = 
-               (struct dsdb_control_current_partition **)void2;
-       struct dsdb_control_current_partition *partition1 = talloc_get_type(*pp1,
-                                                           struct dsdb_control_current_partition);
-       struct dsdb_control_current_partition *partition2 = talloc_get_type(*pp2,
-                                                           struct dsdb_control_current_partition);
-
-       return ldb_dn_compare(partition1->dn, partition2->dn);
-}
-
-static int partition_init(struct ldb_module *module)
-{
-       int ret, i;
-       TALLOC_CTX *mem_ctx = talloc_new(module);
-       const char *attrs[] = { "partition", "replicateEntries", "modules", NULL };
-       struct ldb_result *res;
-       struct ldb_message *msg;
-       struct ldb_message_element *partition_attributes;
-       struct ldb_message_element *replicate_attributes;
-       struct ldb_message_element *modules_attributes;
-
-       struct partition_private_data *data;
-
-       if (!mem_ctx) {
-               return LDB_ERR_OPERATIONS_ERROR;
-       }
-
-       data = talloc(mem_ctx, struct partition_private_data);
-       if (data == NULL) {
-               return LDB_ERR_OPERATIONS_ERROR;
-       }
-
-       ret = ldb_search(module->ldb, ldb_dn_new(mem_ctx, module->ldb, "@PARTITION"),
-                        LDB_SCOPE_BASE,
-                        NULL, attrs,
-                        &res);
-       if (ret != LDB_SUCCESS) {
-               talloc_free(mem_ctx);
-               return ret;
-       }
-       talloc_steal(mem_ctx, res);
-       if (res->count == 0) {
-               talloc_free(mem_ctx);
-               return ldb_next_init(module);
-       }
-
-       if (res->count > 1) {
-               talloc_free(mem_ctx);
-               return LDB_ERR_CONSTRAINT_VIOLATION;
-       }
-
-       msg = res->msgs[0];
-
-       partition_attributes = ldb_msg_find_element(msg, "partition");
-       if (!partition_attributes) {
-               ldb_set_errstring(module->ldb, "partition_init: no partitions specified");
-               talloc_free(mem_ctx);
-               return LDB_ERR_CONSTRAINT_VIOLATION;
-       }
-       data->partitions = talloc_array(data, struct dsdb_control_current_partition *, partition_attributes->num_values + 1);
-       if (!data->partitions) {
-               talloc_free(mem_ctx);
-               return LDB_ERR_OPERATIONS_ERROR;
-       }
-       for (i=0; i < partition_attributes->num_values; i++) {
-               char *base = talloc_strdup(data->partitions, (char *)partition_attributes->values[i].data);
-               char *p = strchr(base, ':');
-               if (!p) {
-                       ldb_asprintf_errstring(module->ldb, 
-                                               "partition_init: "
-                                               "invalid form for partition record (missing ':'): %s", base);
-                       talloc_free(mem_ctx);
-                       return LDB_ERR_CONSTRAINT_VIOLATION;
-               }
-               p[0] = '\0';
-               p++;
-               if (!p[0]) {
-                       ldb_asprintf_errstring(module->ldb, 
-                                               "partition_init: "
-                                               "invalid form for partition record (missing backend database): %s", base);
-                       talloc_free(mem_ctx);
-                       return LDB_ERR_CONSTRAINT_VIOLATION;
-               }
-               data->partitions[i] = talloc(data->partitions, struct dsdb_control_current_partition);
-               if (!data->partitions[i]) {
-                       talloc_free(mem_ctx);
-                       return LDB_ERR_OPERATIONS_ERROR;
-               }
-               data->partitions[i]->version = DSDB_CONTROL_CURRENT_PARTITION_VERSION;
-
-               data->partitions[i]->dn = ldb_dn_new(data->partitions[i], module->ldb, base);
-               if (!data->partitions[i]->dn) {
-                       ldb_asprintf_errstring(module->ldb, 
-                                               "partition_init: invalid DN in partition record: %s", base);
-                       talloc_free(mem_ctx);
-                       return LDB_ERR_CONSTRAINT_VIOLATION;
-               }
-
-               data->partitions[i]->backend = samdb_relative_path(module->ldb, 
-                                                                  data->partitions[i], 
-                                                                  p);
-               if (!data->partitions[i]->backend) {
-                       ldb_asprintf_errstring(module->ldb, 
-                                               "partition_init: unable to determine an relative path for partition: %s", base);
-                       talloc_free(mem_ctx);                   
-               }
-               ret = ldb_connect_backend(module->ldb, data->partitions[i]->backend, NULL, &data->partitions[i]->module);
-               if (ret != LDB_SUCCESS) {
-                       talloc_free(mem_ctx);
-                       return ret;
-               }
-       }
-       data->partitions[i] = NULL;
-
-       /* sort these into order, most to least specific */
-       ldb_qsort(data->partitions, partition_attributes->num_values, sizeof(*data->partitions), 
-                 module->ldb, sort_compare);
-
-       for (i=0; data->partitions[i]; i++) {
-               struct ldb_request *req;
-               req = talloc_zero(mem_ctx, struct ldb_request);
-               if (req == NULL) {
-                       ldb_debug(module->ldb, LDB_DEBUG_ERROR, "partition: Out of memory!\n");
-                       talloc_free(mem_ctx);
-                       return LDB_ERR_OPERATIONS_ERROR;
-               }
-               
-               req->operation = LDB_REQ_REGISTER_PARTITION;
-               req->op.reg_partition.dn = data->partitions[i]->dn;
-               
-               ret = ldb_request(module->ldb, req);
-               if (ret != LDB_SUCCESS) {
-                       ldb_debug(module->ldb, LDB_DEBUG_ERROR, "partition: Unable to register partition with rootdse!\n");
-                       talloc_free(mem_ctx);
-                       return LDB_ERR_OTHER;
-               }
-               talloc_free(req);
-       }
-
-       replicate_attributes = ldb_msg_find_element(msg, "replicateEntries");
-       if (!replicate_attributes) {
-               data->replicate = NULL;
-       } else {
-               data->replicate = talloc_array(data, struct ldb_dn *, replicate_attributes->num_values + 1);
-               if (!data->replicate) {
-                       talloc_free(mem_ctx);
-                       return LDB_ERR_OPERATIONS_ERROR;
-               }
-               
-               for (i=0; i < replicate_attributes->num_values; i++) {
-                       data->replicate[i] = ldb_dn_from_ldb_val(data->replicate, module->ldb, &replicate_attributes->values[i]);
-                       if (!ldb_dn_validate(data->replicate[i])) {
-                               ldb_asprintf_errstring(module->ldb, 
-                                                       "partition_init: "
-                                                       "invalid DN in partition replicate record: %s", 
-                                                       replicate_attributes->values[i].data);
-                               talloc_free(mem_ctx);
-                               return LDB_ERR_CONSTRAINT_VIOLATION;
-                       }
-               }
-               data->replicate[i] = NULL;
-       }
-
-       /* Make the private data available to any searches the modules may trigger in initialisation */
-       module->private_data = data;
-       talloc_steal(module, data);
-       
-       modules_attributes = ldb_msg_find_element(msg, "modules");
-       if (modules_attributes) {
-               for (i=0; i < modules_attributes->num_values; i++) {
-                       struct ldb_dn *base_dn;
-                       int partition_idx;
-                       struct dsdb_control_current_partition *partition = NULL;
-                       const char **modules = NULL;
-
-                       char *base = talloc_strdup(data->partitions, (char *)modules_attributes->values[i].data);
-                       char *p = strchr(base, ':');
-                       if (!p) {
-                               ldb_asprintf_errstring(module->ldb, 
-                                                       "partition_init: "
-                                                       "invalid form for partition module record (missing ':'): %s", base);
-                               talloc_free(mem_ctx);
-                               return LDB_ERR_CONSTRAINT_VIOLATION;
-                       }
-                       p[0] = '\0';
-                       p++;
-                       if (!p[0]) {
-                               ldb_asprintf_errstring(module->ldb, 
-                                                       "partition_init: "
-                                                       "invalid form for partition module record (missing backend database): %s", base);
-                               talloc_free(mem_ctx);
-                               return LDB_ERR_CONSTRAINT_VIOLATION;
-                       }
-
-                       modules = ldb_modules_list_from_string(module->ldb, mem_ctx,
-                                                              p);
-                       
-                       base_dn = ldb_dn_new(mem_ctx, module->ldb, base);
-                       if (!ldb_dn_validate(base_dn)) {
-                               talloc_free(mem_ctx);
-                               return LDB_ERR_OPERATIONS_ERROR;
-                       }
-                       
-                       for (partition_idx = 0; data->partitions[partition_idx]; partition_idx++) {
-                               if (ldb_dn_compare(data->partitions[partition_idx]->dn, base_dn) == 0) {
-                                       partition = data->partitions[partition_idx];
-                                       break;
-                               }
-                       }
-                       
-                       if (!partition) {
-                               ldb_asprintf_errstring(module->ldb, 
-                                                       "partition_init: "
-                                                       "invalid form for partition module record (no such partition): %s", base);
-                               talloc_free(mem_ctx);
-                               return LDB_ERR_CONSTRAINT_VIOLATION;
-                       }
-                       
-                       ret = ldb_load_modules_list(module->ldb, modules, partition->module, &partition->module);
-                       if (ret != LDB_SUCCESS) {
-                               ldb_asprintf_errstring(module->ldb, 
-                                                      "partition_init: "
-                                                      "loading backend for %s failed: %s", 
-                                                      base, ldb_errstring(module->ldb));
-                               talloc_free(mem_ctx);
-                               return ret;
-                       }
-                       ret = ldb_init_module_chain(module->ldb, partition->module);
-                       if (ret != LDB_SUCCESS) {
-                               ldb_asprintf_errstring(module->ldb, 
-                                                      "partition_init: "
-                                                      "initialising backend for %s failed: %s", 
-                                                      base, ldb_errstring(module->ldb));
-                               talloc_free(mem_ctx);
-                               return ret;
-                       }
-               }
-       }
-
-       talloc_free(mem_ctx);
-       return ldb_next_init(module);
-}
-
-static int partition_wait_none(struct ldb_handle *handle) {
-       struct partition_context *ac;
-       int ret;
-       int i;
-    
-       if (!handle || !handle->private_data) {
-               return LDB_ERR_OPERATIONS_ERROR;
-       }
-
-       if (handle->state == LDB_ASYNC_DONE) {
-               return handle->status;
-       }
-
-       handle->state = LDB_ASYNC_PENDING;
-       handle->status = LDB_SUCCESS;
-
-       ac = talloc_get_type(handle->private_data, struct partition_context);
 
-       for (i=0; i < ac->num_requests; i++) {
-               ret = ldb_wait(ac->down_req[i]->handle, LDB_WAIT_NONE);
-               
-               if (ret != LDB_SUCCESS) {
-                       handle->status = ret;
-                       goto done;
-               }
-               if (ac->down_req[i]->handle->status != LDB_SUCCESS) {
-                       handle->status = ac->down_req[i]->handle->status;
-                       goto done;
-               }
-               
-               if (ac->down_req[i]->handle->state != LDB_ASYNC_DONE) {
-                       return LDB_SUCCESS;
-               }
-       }
-
-       ret = LDB_SUCCESS;
-
-done:
-       handle->state = LDB_ASYNC_DONE;
-       return ret;
-}
-
-
-static int partition_wait_all(struct ldb_handle *handle) {
-
-       int ret;
-
-       while (handle->state != LDB_ASYNC_DONE) {
-               ret = partition_wait_none(handle);
-               if (ret != LDB_SUCCESS) {
-                       return ret;
-               }
-       }
-
-       return handle->status;
-}
-
-static int partition_wait(struct ldb_handle *handle, enum ldb_wait_type type)
-{
-       if (type == LDB_WAIT_ALL) {
-               return partition_wait_all(handle);
-       } else {
-               return partition_wait_none(handle);
-       }
+       return partition_send_all(module, ac, req);
 }
 
 _PUBLIC_ const struct ldb_module_ops ldb_partition_module_ops = {
@@ -1093,9 +1119,8 @@ _PUBLIC_ const struct ldb_module_ops ldb_partition_module_ops = {
        .del               = partition_delete,
        .rename            = partition_rename,
        .extended          = partition_extended,
-       .sequence_number   = partition_sequence_number,
        .start_transaction = partition_start_trans,
+       .prepare_commit    = partition_prepare_commit,
        .end_transaction   = partition_end_trans,
        .del_transaction   = partition_del_trans,
-       .wait              = partition_wait
 };