1 files changed, 268 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..e2f6b1d059
--- /dev/null
+++ b/source4/dsdb/samdb/ldb_modules/subtree_rename.c
@@ -0,0 +1,268 @@
+/* 
+   ldb database library
+
+   Copyright (C) Andrew Bartlett <abartlet@samba.org> 2006-2007
+   Copyright (C) Stefan Metzmacher <metze@samba.org> 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: ldb subtree rename module
+ *
+ *  Description: Rename a subtree in LDB
+ *
+ *  Author: Andrew Bartlett
+ */
+
+#include "ldb_module.h"
+
+struct subren_msg_store {
+	struct subren_msg_store *next;
+	struct ldb_dn *olddn;
+	struct ldb_dn *newdn;
+};
+
+struct subtree_rename_context {
+	struct ldb_module *module;
+	struct ldb_request *req;
+
+	struct subren_msg_store *list;
+	struct subren_msg_store *current;
+};
+
+static struct subtree_rename_context *subren_ctx_init(struct ldb_module *module,
+					 struct ldb_request *req)
+{
+	struct ldb_context *ldb;
+	struct subtree_rename_context *ac;
+
+	ldb = ldb_module_get_ctx(module);
+
+	ac = talloc_zero(req, struct subtree_rename_context);
+	if (ac == NULL) {
+		ldb_oom(ldb);
+		return NULL;
+	}
+
+	ac->module = module;
+	ac->req = req;
+
+	return ac;
+}
+
+static int subtree_rename_next_request(struct subtree_rename_context *ac);
+
+static int subtree_rename_callback(struct ldb_request *req,
+				   struct ldb_reply *ares)
+{
+	struct ldb_context *ldb;
+	struct subtree_rename_context *ac;
+	int ret;
+
+	ac = talloc_get_type(req->context, struct subtree_rename_context);
+	ldb = ldb_module_get_ctx(ac->module);
+
+	if (!ares) {
+		return ldb_module_done(ac->req, NULL, NULL,
+					LDB_ERR_OPERATIONS_ERROR);
+	}
+
+	if (ares->error != LDB_SUCCESS) {
+		return ldb_module_done(ac->req, ares->controls,
+					ares->response, ares->error);
+	}
+
+	if (ares->type != LDB_REPLY_DONE) {
+		ldb_set_errstring(ldb, "Invalid reply type!\n");
+		return ldb_module_done(ac->req, NULL, NULL,
+					LDB_ERR_OPERATIONS_ERROR);
+	}
+
+	if (ac->current == NULL) {
+		/* this was the last one */
+		return ldb_module_done(ac->req, ares->controls,
+					ares->response, LDB_SUCCESS);
+	}
+
+	ret = subtree_rename_next_request(ac);
+	if (ret != LDB_SUCCESS) {
+		return ldb_module_done(ac->req, NULL, NULL, ret);
+	}
+
+	talloc_free(ares);
+	return LDB_SUCCESS;
+}
+
+static int subtree_rename_next_request(struct subtree_rename_context *ac)
+{
+	struct ldb_context *ldb;
+	struct ldb_request *req;
+	int ret;
+
+	ldb = ldb_module_get_ctx(ac->module);
+
+	if (ac->current == NULL) {
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+
+	ret = ldb_build_rename_req(&req, ldb, ac->current,
+				   ac->current->olddn,
+				   ac->current->newdn,
+				   ac->req->controls,
+				   ac, subtree_rename_callback,
+				   ac->req);
+	if (ret != LDB_SUCCESS) {
+		return ret;
+	}
+
+	ac->current = ac->current->next;
+
+	return ldb_next_request(ac->module, req);
+}
+
+static int subtree_rename_search_callback(struct ldb_request *req,
+					  struct ldb_reply *ares)
+{
+	struct subren_msg_store *store;
+	struct subtree_rename_context *ac;
+	int ret;
+
+	ac = talloc_get_type(req->context, struct subtree_rename_context);
+
+	if (!ares || !ac->current) {
+		return ldb_module_done(ac->req, NULL, NULL,
+					LDB_ERR_OPERATIONS_ERROR);
+	}
+	if (ares->error != LDB_SUCCESS) {
+		return ldb_module_done(ac->req, ares->controls,
+					ares->response, ares->error);
+	}
+
+	switch (ares->type) {
+	case LDB_REPLY_ENTRY:
+
+		if (ldb_dn_compare(ares->message->dn, ac->list->olddn) == 0) {
+			/* this was already stored by the
+			 * subtree_rename_search() */
+			talloc_free(ares);
+			return LDB_SUCCESS;
+		}
+
+		store = talloc_zero(ac, struct subren_msg_store);
+		if (store == NULL) {
+			return ldb_module_done(ac->req, NULL, NULL,
+						LDB_ERR_OPERATIONS_ERROR);
+		}
+		ac->current->next = store;
+		ac->current = store;
+
+		/* the first list element contains the base for the rename */
+		store->olddn = talloc_steal(store, ares->message->dn);
+		store->newdn = ldb_dn_copy(store, store->olddn);
+
+		if ( ! ldb_dn_remove_base_components(store->newdn,
+				ldb_dn_get_comp_num(ac->list->olddn))) {
+			return ldb_module_done(ac->req, NULL, NULL,
+						LDB_ERR_OPERATIONS_ERROR);
+		}
+
+		if ( ! ldb_dn_add_base(store->newdn, ac->list->newdn)) {
+			return ldb_module_done(ac->req, NULL, NULL,
+						LDB_ERR_OPERATIONS_ERROR);
+		}
+
+		break;
+
+	case LDB_REPLY_REFERRAL:
+		/* ignore */
+		break;
+
+	case LDB_REPLY_DONE:
+
+		/* rewind ac->current */
+		ac->current = ac->list;
+
+		/* All dns set up, start with the first one */
+		ret = subtree_rename_next_request(ac);
+
+		if (ret != LDB_SUCCESS) {
+			return ldb_module_done(ac->req, NULL, NULL, ret);
+		}
+		break;
+	}
+
+	talloc_free(ares);
+	return LDB_SUCCESS;
+}
+
+/* rename */
+static int subtree_rename(struct ldb_module *module, struct ldb_request *req)
+{
+	struct ldb_context *ldb;
+	static const char *attrs[2] = { "distinguishedName", NULL };
+	struct ldb_request *search_req;
+	struct subtree_rename_context *ac;
+	int ret;
+	if (ldb_dn_is_special(req->op.rename.olddn)) { /* do not manipulate our control entries */
+		return ldb_next_request(module, req);
+	}
+
+	ldb = ldb_module_get_ctx(module);
+
+	/* 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 = subren_ctx_init(module, req);
+	if (!ac) {
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+
+	/* add this entry as the first to do */
+	ac->current = talloc_zero(ac, struct subren_msg_store);
+	if (ac->current == NULL) {
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+	ac->current->olddn = req->op.rename.olddn;
+	ac->current->newdn = req->op.rename.newdn;
+	ac->list = ac->current;
+
+	ret = ldb_build_search_req(&search_req, ldb, ac,
+				   req->op.rename.olddn, 
+				   LDB_SCOPE_SUBTREE,
+				   "(objectClass=*)",
+				   attrs,
+				   NULL,
+				   ac, 
+				   subtree_rename_search_callback,
+				   req);
+	if (ret != LDB_SUCCESS) {
+		return ret;
+	}
+
+	return ldb_next_request(module, search_req);
+}
+
+const struct ldb_module_ops ldb_subtree_rename_module_ops = {
+	.name		   = "subtree_rename",
+	.rename            = subtree_rename,
+};