r24259: Rework the objectclass module to use the new schema, rather than the

ldb_subclass list.

Next step will be to have this module also set the objectCategory and
default ntSecurityDescriptor

Andrew Bartlett
(This used to be commit 0f7135a4685a1117a54c2f019df6c6de22b8dd32)

2 files changed, 703 insertions, 0 deletions

diff --git a/source4/dsdb/samdb/ldb_modules/config.mk b/source4/dsdb/samdb/ldb_modules/config.mk
index f49753586e..7b42123d0a 100644
--- a/source4/dsdb/samdb/ldb_modules/config.mk
+++ b/source4/dsdb/samdb/ldb_modules/config.mk
@@ -220,3 +220,15 @@ OBJ_FILES = \
 # End MODULE ldb_update_kt
 ################################################
 
+################################################
+# Start MODULE ldb_objectclass
+[MODULE::ldb_objectclass]
+INIT_FUNCTION = ldb_objectclass_init
+CFLAGS = -Ilib/ldb/include
+PRIVATE_DEPENDENCIES = LIBTALLOC
+SUBSYSTEM = LIBLDB
+OBJ_FILES = \
+		objectclass.o
+# End MODULE ldb_objectclass
+################################################
+
diff --git a/source4/dsdb/samdb/ldb_modules/objectclass.c b/source4/dsdb/samdb/ldb_modules/objectclass.c
new file mode 100644
index 0000000000..ad11442035
--- /dev/null
+++ b/source4/dsdb/samdb/ldb_modules/objectclass.c
@@ -0,0 +1,691 @@
+/* 
+   ldb database library
+
+   Copyright (C) Simo Sorce  2006
+   Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005-2007
+
+   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
+   (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/*
+ *  Name: ldb
+ *
+ *  Component: objectClass sorting module
+ *
+ *  Description: sort the objectClass attribute into the class hierarchy
+ *
+ *  Author: Andrew Bartlett
+ */
+
+
+#include "includes.h"
+#include "ldb/include/ldb.h"
+#include "ldb/include/ldb_errors.h"
+#include "ldb/include/ldb_private.h"
+#include "dsdb/samdb/samdb.h"
+#include "lib/util/dlinklist.h"
+struct oc_context {
+
+	enum oc_step {OC_DO_REQ, OC_SEARCH_SELF, OC_DO_MOD} step;
+
+	struct ldb_module *module;
+	struct ldb_request *orig_req;
+
+	struct ldb_request *down_req;
+
+	struct ldb_request *search_req;
+	struct ldb_reply *search_res;
+
+	struct ldb_request *mod_req;
+};
+
+struct class_list {
+	struct class_list *prev, *next;
+	const char *objectclass;
+};
+
+static struct ldb_handle *oc_init_handle(struct ldb_request *req, struct ldb_module *module)
+{
+	struct oc_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 oc_context);
+	if (ac == NULL) {
+		ldb_set_errstring(module->ldb, "Out of Memory");
+		talloc_free(h);
+		return NULL;
+	}
+
+	h->private_data = (void *)ac;
+
+	h->state = LDB_ASYNC_INIT;
+	h->status = LDB_SUCCESS;
+
+	ac->module = module;
+	ac->orig_req = req;
+
+	return h;
+}
+
+static int objectclass_sort(struct ldb_module *module,
+			    TALLOC_CTX *mem_ctx,
+			    struct ldb_message_element *objectclass_element,
+			    struct class_list **sorted_out) 
+{
+	int i;
+	int layer;
+	const struct dsdb_schema *schema = dsdb_get_schema(module->ldb);
+	struct class_list *sorted = NULL, *parent_class = NULL,
+		*subclass = NULL, *unsorted = NULL, *current, *poss_subclass;
+	/* DESIGN:
+	 *
+	 * We work on 4 different 'bins' (implemented here as linked lists):
+	 *
+	 * * sorted:       the eventual list, in the order we wish to push
+	 *                 into the database.  This is the only ordered list.
+	 *
+	 * * parent_class: The current parent class 'bin' we are
+	 *                 trying to find subclasses for
+	 *
+	 * * subclass:     The subclasses we have found so far
+	 *
+	 * * unsorted:     The remaining objectClasses
+	 *
+	 * The process is a matter of filtering objectClasses up from
+	 * unsorted into sorted.  Order is irrelevent in the later 3 'bins'.
+	 * 
+	 * We start with 'top' (found and promoted to parent_class
+	 * initially).  Then we find (in unsorted) all the direct
+	 * subclasses of 'top'.  parent_classes is concatenated onto
+	 * the end of 'sorted', and subclass becomes the list in
+	 * parent_class.
+	 *
+	 * We then repeat, until we find no more subclasses.  Any left
+	 * over classes are added to the end.
+	 *
+	 */
+
+	/* Firstly, dump all the objectClass elements into the
+	 * unsorted bin, except for 'top', which is special */
+	for (i=0; i < objectclass_element->num_values; i++) {
+		current = talloc(mem_ctx, struct class_list);
+		if (!current) {
+			ldb_set_errstring(module->ldb, "objectclass: out of memory allocating objectclass list");
+			talloc_free(mem_ctx);
+			return LDB_ERR_OPERATIONS_ERROR;
+		}
+		current->objectclass = (const char *)objectclass_element->values[i].data;
+
+		/* this is the root of the tree.  We will start
+		 * looking for subclasses from here */
+		if (ldb_attr_cmp("top", current->objectclass) == 0) {
+			DLIST_ADD_END(parent_class, current, struct class_list *);
+		} else {
+			DLIST_ADD_END(unsorted, current, struct class_list *);
+		}
+	}
+
+	/* DEBUGGING aid:  how many layers are we down now? */
+	layer = 0;
+	do {
+		layer++;
+		/* Find all the subclasses of classes in the
+		 * parent_classes.  Push them onto the subclass list */
+
+		/* Ensure we don't bother if there are no unsorted entries left */
+		for (current = parent_class; schema && unsorted && current; current = current->next) {
+			/* Walk the list of possible subclasses in unsorted */
+			for (poss_subclass = unsorted; poss_subclass; ) {
+				const struct dsdb_class *class = dsdb_class_by_lDAPDisplayName(schema, poss_subclass->objectclass);
+				struct class_list *next;
+				
+				/* Save the next pointer, as the DLIST_ macros will change poss_subclass->next */
+				next = poss_subclass->next;
+
+				if (ldb_attr_cmp(class->subClassOf, current->objectclass) == 0) {
+					DLIST_REMOVE(unsorted, poss_subclass);
+					DLIST_ADD(subclass, poss_subclass);
+					
+					break;
+				}
+				poss_subclass = next;
+			}
+		}
+
+		/* Now push the parent_classes as sorted, we are done with
+		these.  Add to the END of the list by concatenation */
+		DLIST_CONCATENATE(sorted, parent_class, struct class_list *);
+
+		/* and now find subclasses of these */
+		parent_class = subclass;
+		subclass = NULL;
+
+		/* If we didn't find any subclasses we will fall out
+		 * the bottom here */
+	} while (parent_class);
+
+	/* This shouldn't happen, and would break MMC, but we can't
+	 * afford to loose objectClasses.  Perhaps there was no 'top',
+	 * or some other schema error? 
+	 *
+	 * Detecting schema errors is the job of the schema module, so
+	 * at this layer we just try not to loose data
+ 	 */
+	DLIST_CONCATENATE(sorted, unsorted, struct class_list *);
+
+	*sorted_out = sorted;
+	return LDB_SUCCESS;
+}
+
+static int objectclass_add(struct ldb_module *module, struct ldb_request *req)
+{
+	struct ldb_message_element *objectclass_element;
+	struct class_list *sorted, *current;
+	struct ldb_request *down_req;
+	struct ldb_message *msg;
+	int ret;
+	TALLOC_CTX *mem_ctx;
+
+	ldb_debug(module->ldb, LDB_DEBUG_TRACE, "objectclass_add\n");
+
+	if (ldb_dn_is_special(req->op.add.message->dn)) { /* do not manipulate our control entries */
+		return ldb_next_request(module, req);
+	}
+	
+	objectclass_element = ldb_msg_find_element(req->op.add.message, "objectClass");
+
+	/* If no part of this add has an objectClass, then we don't
+	 * need to make any changes. cn=rootdse doesn't have an objectClass */
+	if (!objectclass_element) {
+		return ldb_next_request(module, req);
+	}
+
+	mem_ctx = talloc_new(req);
+	if (mem_ctx == NULL) {
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+
+	ret = objectclass_sort(module, mem_ctx, objectclass_element, &sorted);
+	if (ret != LDB_SUCCESS) {
+		return ret;
+	}
+
+	/* prepare the first operation */
+	down_req = talloc(req, struct ldb_request);
+	if (down_req == NULL) {
+		ldb_set_errstring(module->ldb, "Out of memory!");
+		talloc_free(mem_ctx);
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+
+	*down_req = *req; /* copy the request */
+
+	down_req->op.add.message = msg = ldb_msg_copy_shallow(down_req, req->op.add.message);
+
+	if (down_req->op.add.message == NULL) {
+		talloc_free(mem_ctx);
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+
+	ldb_msg_remove_attr(msg, "objectClass");
+	ret = ldb_msg_add_empty(msg, "objectClass", 0, NULL);
+	
+	if (ret != LDB_SUCCESS) {
+		talloc_free(mem_ctx);
+		return ret;
+	}
+
+	/* We must completely replace the existing objectClass entry,
+	 * because we need it sorted */
+
+	/* Move from the linked list back into an ldb msg */
+	for (current = sorted; current; current = current->next) {
+		ret = ldb_msg_add_string(msg, "objectClass", current->objectclass);
+		if (ret != LDB_SUCCESS) {
+			ldb_set_errstring(module->ldb, "objectclass: could not re-add sorted objectclass to modify msg");
+			talloc_free(mem_ctx);
+			return ret;
+		}
+	}
+
+	talloc_free(mem_ctx);
+	ret = ldb_msg_sanity_check(module->ldb, msg);
+
+	if (ret != LDB_SUCCESS) {
+		return ret;
+	}
+
+	/* 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 objectclass_modify(struct ldb_module *module, struct ldb_request *req)
+{
+	struct ldb_message_element *objectclass_element;
+	struct ldb_message *msg;
+	ldb_debug(module->ldb, LDB_DEBUG_TRACE, "objectclass_modify\n");
+
+	if (ldb_dn_is_special(req->op.mod.message->dn)) { /* do not manipulate our control entries */
+		return ldb_next_request(module, req);
+	}
+	
+	objectclass_element = ldb_msg_find_element(req->op.mod.message, "objectClass");
+
+	/* If no part of this touches the objectClass, then we don't
+	 * need to make any changes.  */
+	/* If the only operation is the deletion of the objectClass then go on */
+	if (!objectclass_element) {
+		return ldb_next_request(module, req);
+	}
+
+	switch (objectclass_element->flags & LDB_FLAG_MOD_MASK) {
+	case LDB_FLAG_MOD_DELETE:
+		/* Delete everything?  Probably totally illigal, but hey! */
+		if (objectclass_element->num_values == 0) {
+			return ldb_next_request(module, req);
+		}
+		break;
+	case LDB_FLAG_MOD_REPLACE:
+	{
+		struct ldb_request *down_req;
+		struct class_list *sorted, *current;
+		TALLOC_CTX *mem_ctx;
+		int ret;
+		mem_ctx = talloc_new(req);
+		if (mem_ctx == NULL) {
+			return LDB_ERR_OPERATIONS_ERROR;
+		}
+
+		/* prepare the first operation */
+		down_req = talloc(req, struct ldb_request);
+		if (down_req == NULL) {
+			ldb_set_errstring(module->ldb, "Out of memory!");
+			talloc_free(mem_ctx);
+			return LDB_ERR_OPERATIONS_ERROR;
+		}
+		
+		*down_req = *req; /* copy the request */
+		
+		down_req->op.mod.message = msg = ldb_msg_copy_shallow(down_req, req->op.mod.message);
+		
+		if (down_req->op.add.message == NULL) {
+			talloc_free(mem_ctx);
+			return LDB_ERR_OPERATIONS_ERROR;
+		}
+		
+		ret = objectclass_sort(module, mem_ctx, objectclass_element, &sorted);
+		if (ret != LDB_SUCCESS) {
+			return ret;
+		}
+
+		/* We must completely replace the existing objectClass entry,
+		 * because we need it sorted */
+		
+		ldb_msg_remove_attr(msg, "objectClass");
+		ret = ldb_msg_add_empty(msg, "objectClass", LDB_FLAG_MOD_REPLACE, NULL);
+		
+		if (ret != LDB_SUCCESS) {
+			talloc_free(mem_ctx);
+			return ret;
+		}
+
+		/* Move from the linked list back into an ldb msg */
+		for (current = sorted; current; current = current->next) {
+			ret = ldb_msg_add_string(msg, "objectClass", current->objectclass);
+			if (ret != LDB_SUCCESS) {
+				ldb_set_errstring(module->ldb, "objectclass: could not re-add sorted objectclass to modify msg");
+				talloc_free(mem_ctx);
+				return ret;
+			}
+		}
+		
+		talloc_free(mem_ctx);
+
+		ret = ldb_msg_sanity_check(module->ldb, msg);
+		if (ret != LDB_SUCCESS) {
+			talloc_free(mem_ctx);
+			return ret;
+		}
+		
+		/* 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;
+	}
+	}
+
+	{
+		struct ldb_handle *h;
+		struct oc_context *ac;
+		
+		h = oc_init_handle(req, module);
+		if (!h) {
+			return LDB_ERR_OPERATIONS_ERROR;
+		}
+		ac = talloc_get_type(h->private_data, struct oc_context);
+		
+		/* return or own handle to deal with this call */
+		req->handle = h;
+		
+		/* prepare the first operation */
+		ac->down_req = talloc(ac, struct ldb_request);
+		if (ac->down_req == NULL) {
+			ldb_set_errstring(module->ldb, "Out of memory!");
+			return LDB_ERR_OPERATIONS_ERROR;
+		}
+		
+		*(ac->down_req) = *req; /* copy the request */
+		
+		ac->down_req->context = NULL;
+		ac->down_req->callback = NULL;
+		ldb_set_timeout_from_prev_req(module->ldb, req, ac->down_req);
+		
+		ac->step = OC_DO_REQ;
+
+		return ldb_next_request(module, ac->down_req);
+	}
+}
+
+static int get_self_callback(struct ldb_context *ldb, void *context, struct ldb_reply *ares)
+{
+	struct oc_context *ac;
+
+	if (!context || !ares) {
+		ldb_set_errstring(ldb, "NULL Context or Result in callback");
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+
+	ac = talloc_get_type(context, struct oc_context);
+
+	/* we are interested only in the single reply (base search) we receive here */
+	if (ares->type == LDB_REPLY_ENTRY) {
+		if (ac->search_res != NULL) {
+			ldb_set_errstring(ldb, "Too many results");
+			talloc_free(ares);
+			return LDB_ERR_OPERATIONS_ERROR;
+		}
+
+		ac->search_res = talloc_move(ac, &ares);
+	} else {
+		talloc_free(ares);
+	}
+
+	return LDB_SUCCESS;
+}
+
+static int objectclass_search_self(struct ldb_handle *h) {
+
+	struct oc_context *ac;
+	static const char * const attrs[] = { "objectClass", NULL };
+
+	ac = talloc_get_type(h->private_data, struct oc_context);
+
+	/* prepare the search operation */
+	ac->search_req = talloc_zero(ac, struct ldb_request);
+	if (ac->search_req == NULL) {
+		ldb_debug(ac->module->ldb, LDB_DEBUG_ERROR, "Out of Memory!\n");
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+
+	ac->search_req->operation = LDB_SEARCH;
+	ac->search_req->op.search.base = ac->orig_req->op.mod.message->dn;
+	ac->search_req->op.search.scope = LDB_SCOPE_BASE;
+	ac->search_req->op.search.tree = ldb_parse_tree(ac->search_req, NULL);
+	if (ac->search_req->op.search.tree == NULL) {
+		ldb_set_errstring(ac->module->ldb, "objectclass: Internal error producing null search");
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+	ac->search_req->op.search.attrs = attrs;
+	ac->search_req->controls = NULL;
+	ac->search_req->context = ac;
+	ac->search_req->callback = get_self_callback;
+	ldb_set_timeout_from_prev_req(ac->module->ldb, ac->orig_req, ac->search_req);
+
+	ac->step = OC_SEARCH_SELF;
+
+	return ldb_next_request(ac->module, ac->search_req);
+}
+
+static int objectclass_do_mod(struct ldb_handle *h) {
+
+	struct oc_context *ac;
+	struct ldb_message_element *objectclass_element;
+	struct ldb_message *msg;
+	TALLOC_CTX *mem_ctx;
+	struct class_list *sorted, *current;
+	int ret;
+      
+	ac = talloc_get_type(h->private_data, struct oc_context);
+
+	mem_ctx = talloc_new(ac);
+	if (mem_ctx == NULL) {
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+
+	ac->mod_req = talloc(ac, struct ldb_request);
+	if (ac->mod_req == NULL) {
+		talloc_free(mem_ctx);
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+
+	ac->mod_req->operation = LDB_MODIFY;
+	ac->mod_req->controls = NULL;
+	ac->mod_req->context = ac;
+	ac->mod_req->callback = NULL;
+	ldb_set_timeout_from_prev_req(ac->module->ldb, ac->orig_req, ac->mod_req);
+	
+	/* use a new message structure */
+	ac->mod_req->op.mod.message = msg = ldb_msg_new(ac->mod_req);
+	if (msg == NULL) {
+		ldb_set_errstring(ac->module->ldb, "objectclass: could not create new modify msg");
+		talloc_free(mem_ctx);
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+
+	/* This is now the objectClass list from the database */
+	objectclass_element = ldb_msg_find_element(ac->search_res->message, 
+						   "objectClass");
+	if (!objectclass_element) {
+		/* Where did it go?  Move along now, nothing to see here */
+		talloc_free(mem_ctx);
+		return LDB_SUCCESS;
+	}
+	
+	/* modify dn */
+	msg->dn = ac->orig_req->op.mod.message->dn;
+
+	ret = objectclass_sort(ac->module, mem_ctx, objectclass_element, &sorted);
+	if (ret != LDB_SUCCESS) {
+		return ret;
+	}
+
+	/* We must completely replace the existing objectClass entry.
+	 * We could do a constrained add/del, but we are meant to be
+	 * in a transaction... */
+
+	ret = ldb_msg_add_empty(msg, "objectClass", LDB_FLAG_MOD_REPLACE, NULL);
+	if (ret != LDB_SUCCESS) {
+		ldb_set_errstring(ac->module->ldb, "objectclass: could not clear objectclass in modify msg");
+		talloc_free(mem_ctx);
+		return ret;
+	}
+	
+	/* Move from the linked list back into an ldb msg */
+	for (current = sorted; current; current = current->next) {
+		ret = ldb_msg_add_string(msg, "objectClass", current->objectclass);
+		if (ret != LDB_SUCCESS) {
+			ldb_set_errstring(ac->module->ldb, "objectclass: could not re-add sorted objectclass to modify msg");
+			talloc_free(mem_ctx);
+			return ret;
+		}
+	}
+
+	ret = ldb_msg_sanity_check(ac->module->ldb, msg);
+	if (ret != LDB_SUCCESS) {
+		talloc_free(mem_ctx);
+		return ret;
+	}
+
+
+	h->state = LDB_ASYNC_INIT;
+	h->status = LDB_SUCCESS;
+
+	ac->step = OC_DO_MOD;
+
+	talloc_free(mem_ctx);
+	/* perform the search */
+	return ldb_next_request(ac->module, ac->mod_req);
+}
+
+static int oc_wait(struct ldb_handle *handle) {
+	struct oc_context *ac;
+	int ret;
+    
+	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 oc_context);
+
+	switch (ac->step) {
+	case OC_DO_REQ:
+		ret = ldb_wait(ac->down_req->handle, LDB_WAIT_NONE);
+
+		if (ret != LDB_SUCCESS) {
+			handle->status = ret;
+			goto done;
+		}
+		if (ac->down_req->handle->status != LDB_SUCCESS) {
+			handle->status = ac->down_req->handle->status;
+			goto done;
+		}
+
+		if (ac->down_req->handle->state != LDB_ASYNC_DONE) {
+			return LDB_SUCCESS;
+		}
+
+		/* mods done, go on */
+		return objectclass_search_self(handle);
+
+	case OC_SEARCH_SELF:
+		ret = ldb_wait(ac->search_req->handle, LDB_WAIT_NONE);
+
+		if (ret != LDB_SUCCESS) {
+			handle->status = ret;
+			goto done;
+		}
+		if (ac->search_req->handle->status != LDB_SUCCESS) {
+			handle->status = ac->search_req->handle->status;
+			goto done;
+		}
+
+		if (ac->search_req->handle->state != LDB_ASYNC_DONE) {
+			return LDB_SUCCESS;
+		}
+
+		/* self search done, go on */
+		return objectclass_do_mod(handle);
+
+	case OC_DO_MOD:
+		ret = ldb_wait(ac->mod_req->handle, LDB_WAIT_NONE);
+
+		if (ret != LDB_SUCCESS) {
+			handle->status = ret;
+			goto done;
+		}
+		if (ac->mod_req->handle->status != LDB_SUCCESS) {
+			handle->status = ac->mod_req->handle->status;
+			goto done;
+		}
+
+		if (ac->mod_req->handle->state != LDB_ASYNC_DONE) {
+			return LDB_SUCCESS;
+		}
+
+		break;
+		
+	default:
+		ret = LDB_ERR_OPERATIONS_ERROR;
+		goto done;
+	}
+
+	ret = LDB_SUCCESS;
+
+done:
+	handle->state = LDB_ASYNC_DONE;
+	return ret;
+}
+
+static int oc_wait_all(struct ldb_handle *handle) {
+
+	int ret;
+
+	while (handle->state != LDB_ASYNC_DONE) {
+		ret = oc_wait(handle);
+		if (ret != LDB_SUCCESS) {
+			return ret;
+		}
+	}
+
+	return handle->status;
+}
+
+static int objectclass_wait(struct ldb_handle *handle, enum ldb_wait_type type)
+{
+	if (type == LDB_WAIT_ALL) {
+		return oc_wait_all(handle);
+	} else {
+		return oc_wait(handle);
+	}
+}
+
+static const struct ldb_module_ops objectclass_ops = {
+	.name		   = "objectclass",
+	.add           = objectclass_add,
+	.modify        = objectclass_modify,
+	.wait          = objectclass_wait
+};
+
+int ldb_objectclass_init(void)
+{
+	return ldb_register_module(&objectclass_ops);
+}
+