1 files changed, 290 insertions, 0 deletions
diff --git a/source4/dsdb/samdb/ldb_modules/subtree_rename.c b/source4/dsdb/samdb/ldb_modules/subtree_rename.c
new file mode 100644
index 0000000000..993331216e
--- /dev/null
+++ b/source4/dsdb/samdb/ldb_modules/subtree_rename.c
@@ -0,0 +1,290 @@
+/* 
+   ldb database library
+
+   Copyright (C) Andrew Bartlett <abartlet@samba.org> 2006-2007
+   Copyright (C) Stefan Metzmacher <metze@samba.org> 2007
+
+     ** NOTE! The following LGPL license applies to the ldb
+     ** library. This does NOT imply that all of Samba is released
+     ** under the LGPL
+   
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 3 of the License, or (at your option) any later version.
+
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library; if not, see <http://www.gnu.org/licenses/>.
+*/
+
+/*
+ *  Name: ldb
+ *
+ *  Component: ldb subtree rename module
+ *
+ *  Description: Rename a subtree in LDB
+ *
+ *  Author: Andrew Bartlett
+ */
+
+#include "ldb_includes.h"
+
+struct subtree_rename_context {
+	struct ldb_module *module;
+	struct ldb_handle *handle;
+	struct ldb_request *orig_req;
+
+	struct ldb_request **down_req;
+	int num_requests;
+	int finished_requests;
+};
+
+struct subtree_rename_search_context {
+	struct ldb_module *module;
+	struct ldb_request *orig_req;
+	struct ldb_handle *handle;
+
+	struct ldb_request **down_req;
+	int num_requests;
+	int finished_requests;
+};
+
+static struct subtree_rename_context *subtree_rename_init_handle(struct ldb_request *req, 
+								 struct ldb_module *module)
+{
+	struct subtree_rename_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 subtree_rename_context);
+	if (ac == NULL) {
+		ldb_set_errstring(module->ldb, "Out of Memory");
+		talloc_free(h);
+		return NULL;
+	}
+
+	h->private_data	= ac;
+
+	ac->module = module;
+	ac->handle = h;
+	ac->orig_req = req;
+
+	req->handle = h;
+
+	return ac;
+}
+
+
+static int subtree_rename_search_callback(struct ldb_context *ldb, void *context, struct ldb_reply *ares) 
+{
+	/* OK, we have one of *many* search results here:
+
+	   We should also get the entry we tried to rename.  This
+	   callback handles this and everything below it.
+	 */
+
+	if (ares->type == LDB_REPLY_ENTRY) {
+		/* And it is an actual entry: now create a rename from it */
+		struct subtree_rename_context *ac = talloc_get_type(context, struct subtree_rename_context);
+		struct ldb_request *req;
+		int ret;
+
+		TALLOC_CTX *mem_ctx = talloc_new(ac);
+		
+		struct ldb_dn *newdn = ldb_dn_copy(mem_ctx, ares->message->dn);
+		if (!newdn) {
+			ldb_oom(ac->module->ldb);
+			return LDB_ERR_OPERATIONS_ERROR;
+		}
+			
+		ldb_dn_remove_base_components(newdn, ldb_dn_get_comp_num(ac->orig_req->op.rename.olddn));
+
+		if (!ldb_dn_add_base(newdn, ac->orig_req->op.rename.newdn)) {
+			ldb_oom(ac->module->ldb);
+			return LDB_ERR_OPERATIONS_ERROR;
+		}
+
+		ret = ldb_build_rename_req(&req, ldb, mem_ctx,
+					   ares->message->dn,
+					   newdn,
+					   NULL,
+					   NULL,
+					   NULL);
+		
+		if (ret != LDB_SUCCESS) return ret;
+
+		talloc_steal(req, newdn);
+
+		req->handle = ac->handle;
+
+		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;
+		}
+		ac->down_req[ac->num_requests] = req;
+		
+		return ldb_next_request(ac->module, req);
+
+	} else {
+		talloc_free(ares);
+	}
+
+	return LDB_SUCCESS;
+
+}
+
+/* rename */
+static int subtree_rename(struct ldb_module *module, struct ldb_request *req)
+{
+	const char *attrs[] = { NULL };
+	struct ldb_request *new_req;
+	struct subtree_rename_context *ac;
+	int ret;
+	struct ldb_search_options_control *search_options;
+	if (ldb_dn_is_special(req->op.mod.message->dn)) { /* do not manipulate our control entries */
+		return ldb_next_request(module, req);
+	}
+
+	/* This gets complex:  We need to:
+	   - Do a search for all entires under this entry 
+	   - Wait for these results to appear
+	   - In the callback for each result, issue a modify request
+	    - That will include this rename, we hope
+	   - Wait for each modify result
+	   - Regain our sainity 
+	*/
+
+	ac = subtree_rename_init_handle(req, module);
+	if (!ac) {
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+
+	ret = ldb_build_search_req(&new_req, module->ldb, req,
+				   req->op.rename.olddn, 
+				   LDB_SCOPE_SUBTREE,
+				   "objectClass=*",
+				   attrs,
+				   req->controls,
+				   ac, 
+				   subtree_rename_search_callback);
+
+	/* We want to find any partitions under this entry.  That way,
+	 * if we try and rename a whole partition, the partitions
+	 * module should cause us to fail the lot */
+	search_options = talloc(ac, struct ldb_search_options_control);
+	if (!search_options) {
+		ldb_oom(ac->module->ldb);
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+	search_options->search_options = LDB_SEARCH_OPTION_PHANTOM_ROOT;
+
+	ret = ldb_request_add_control(new_req, LDB_CONTROL_SEARCH_OPTIONS_OID, false, search_options);
+	if (ret != LDB_SUCCESS) {
+		return ret;
+	}
+
+	new_req->handle = req->handle;
+
+	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;
+	}
+	ac->down_req[ac->num_requests] = new_req;
+	if (req == NULL) {
+		ldb_oom(ac->module->ldb);
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+	
+	return ldb_next_request(module, req);
+}
+
+static int subtree_rename_wait_none(struct ldb_handle *handle) {
+	struct subtree_rename_context *ac;
+	int i, 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 subtree_rename_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 subtree_rename_wait_all(struct ldb_handle *handle) {
+
+	int ret;
+
+	while (handle->state != LDB_ASYNC_DONE) {
+		ret = subtree_rename_wait_none(handle);
+		if (ret != LDB_SUCCESS) {
+			return ret;
+		}
+	}
+
+	return handle->status;
+}
+
+static int subtree_rename_wait(struct ldb_handle *handle, enum ldb_wait_type type)
+{
+	if (type == LDB_WAIT_ALL) {
+		return subtree_rename_wait_all(handle);
+	} else {
+		return subtree_rename_wait_none(handle);
+	}
+}
+
+static const struct ldb_module_ops subtree_rename_ops = {
+	.name		   = "subtree_rename",
+	.rename            = subtree_rename,
+	.wait              = subtree_rename_wait,
+};
+
+int ldb_subtree_rename_init(void)
+{
+	return ldb_register_module(&subtree_rename_ops);
+}