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-rw-r--r--source4/dsdb/samdb/ldb_modules/config.mk12
-rw-r--r--source4/dsdb/samdb/ldb_modules/linked_attributes.c312
2 files changed, 324 insertions, 0 deletions
diff --git a/source4/dsdb/samdb/ldb_modules/config.mk b/source4/dsdb/samdb/ldb_modules/config.mk
index f35f26371b..a93dea7db7 100644
--- a/source4/dsdb/samdb/ldb_modules/config.mk
+++ b/source4/dsdb/samdb/ldb_modules/config.mk
@@ -244,3 +244,15 @@ OBJ_FILES = \
# End MODULE ldb_subtree_rename
################################################
+################################################
+# Start MODULE ldb_linked_attributes
+[MODULE::ldb_linked_attributes]
+INIT_FUNCTION = ldb_linked_attributes_init
+CFLAGS = -Ilib/ldb/include
+PRIVATE_DEPENDENCIES = LIBTALLOC SAMDB
+SUBSYSTEM = LIBLDB
+OBJ_FILES = \
+ linked_attributes.o
+# End MODULE ldb_linked_attributes
+################################################
+
diff --git a/source4/dsdb/samdb/ldb_modules/linked_attributes.c b/source4/dsdb/samdb/ldb_modules/linked_attributes.c
new file mode 100644
index 0000000000..f386795643
--- /dev/null
+++ b/source4/dsdb/samdb/ldb_modules/linked_attributes.c
@@ -0,0 +1,312 @@
+/*
+ ldb database library
+
+ Copyright (C) Andrew Bartlett <abartlet@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 linked_attributes module
+ *
+ * Description: Module to ensure linked attribute pairs remain in sync
+ *
+ * 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"
+
+struct linked_attributes_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;
+};
+
+static struct linked_attributes_context *linked_attributes_init_handle(struct ldb_request *req,
+ struct ldb_module *module)
+{
+ struct linked_attributes_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 linked_attributes_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;
+}
+
+/* add */
+static int linked_attributes_add(struct ldb_module *module, struct ldb_request *req)
+{
+ int i, j, ret;
+ struct linked_attributes_context *ac;
+
+ const struct dsdb_schema *schema = dsdb_get_schema(module->ldb);
+ if (!schema) {
+ /* without schema, this doesn't make any sense */
+ return ldb_next_request(module, req);
+ }
+
+ if (ldb_dn_is_special(req->op.mod.message->dn)) {
+ /* do not manipulate our control entries */
+ return ldb_next_request(module, req);
+ }
+
+
+ ac = linked_attributes_init_handle(req, module);
+ if (!ac) {
+ return LDB_ERR_OPERATIONS_ERROR;
+ }
+
+ /* prepare the first operation */
+ ac->down_req = talloc_realloc(ac, ac->down_req,
+ struct ldb_request *, 1);
+ if (!ac->down_req) {
+ ldb_oom(ac->module->ldb);
+ return LDB_ERR_OPERATIONS_ERROR;
+ }
+
+ ac->down_req[0] = talloc(ac->down_req, struct ldb_request);
+ if (!ac->down_req[0]) {
+ ldb_oom(ac->module->ldb);
+ return LDB_ERR_OPERATIONS_ERROR;
+ }
+ *(ac->down_req[0]) = *req; /* copy the request */
+
+ ac->num_requests++;
+
+ /* Run the original request */
+ ret = ldb_next_request(module, req);
+ if (ret != LDB_SUCCESS) {
+ return ret;
+ }
+
+ for (i=0; i < req->op.add.message->num_elements; i++) {
+ const struct dsdb_attribute *target_attr;
+ const struct ldb_message_element *el = &req->op.add.message->elements[i];
+ const struct dsdb_attribute *schema_attr
+ = dsdb_attribute_by_lDAPDisplayName(schema, el->name);
+ if (!schema_attr) {
+ ldb_asprintf_errstring(module->ldb,
+ "attribute %s is not a valid attribute in schema", req->op.add.message->elements[i].name);
+ return LDB_ERR_OBJECT_CLASS_VIOLATION;
+ }
+ /* We have a valid attribute, not find out if it is linked */
+ if (schema_attr->linkID == 0) {
+ continue;
+ }
+
+ if ((schema_attr->linkID & 1) == 1) {
+ /* Odd is for the target. Illigal to modify */
+ ldb_asprintf_errstring(module->ldb,
+ "attribute %s must not be modified directly, it is a linked attribute", req->op.add.message->elements[i].name);
+ return LDB_ERR_UNWILLING_TO_PERFORM;
+ }
+
+ /* Even link IDs are for the originating attribute */
+
+ /* Now find the target attribute */
+ target_attr = dsdb_attribute_by_linkID(schema, schema_attr->linkID + 1);
+ if (!target_attr) {
+ ldb_asprintf_errstring(module->ldb,
+ "attribute %s does not have valid link target", req->op.add.message->elements[i].name);
+ return LDB_ERR_OBJECT_CLASS_VIOLATION;
+ }
+
+ /* Prepare the modify (add element) on the targets */
+
+ /* For each value being added, we need to setup the modify */
+ for (j=0; j < el->num_values; j++) {
+ struct ldb_request *new_req;
+ /* Create the modify request */
+ struct ldb_message *new_msg = ldb_msg_new(ac->down_req);
+ if (!new_msg) {
+ ldb_oom(module->ldb);
+ return LDB_ERR_OPERATIONS_ERROR;
+ }
+ new_msg->dn = ldb_dn_new(new_msg, module->ldb, (char *)el->values[j].data);
+ if (!new_msg->dn) {
+ ldb_asprintf_errstring(module->ldb,
+ "attribute %s value %s was not a valid DN", req->op.add.message->elements[i].name,
+ el->values[j].data);
+ return LDB_ERR_INVALID_ATTRIBUTE_SYNTAX;
+ }
+
+ ret = ldb_msg_add_empty(new_msg, target_attr->lDAPDisplayName,
+ LDB_FLAG_MOD_ADD, NULL);
+ if (ret != LDB_SUCCESS) {
+ return ret;
+ }
+
+ ret = ldb_msg_add_string(new_msg, target_attr->lDAPDisplayName,
+ ldb_dn_get_linearized(ac->orig_req->op.add.message->dn));
+ if (ret != LDB_SUCCESS) {
+ return ret;
+ }
+
+ ret = ldb_build_mod_req(&new_req, module->ldb, ac->down_req,
+ new_msg,
+ NULL,
+ NULL,
+ NULL);
+ if (ret != LDB_SUCCESS) {
+ return ret;
+ }
+
+ talloc_steal(new_req, new_msg);
+
+ ldb_set_timeout_from_prev_req(module->ldb, req, new_req);
+
+ /* Now add it to the list */
+ 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;
+ ac->num_requests++;
+
+ /* Run the new request */
+ ret = ldb_next_request(module, new_req);
+ if (ret != LDB_SUCCESS) {
+ return ret;
+ }
+ }
+ }
+ return ret;
+}
+
+/* modify */
+static int linked_attributes_modify(struct ldb_module *module, struct ldb_request *req)
+{
+ return ldb_next_request(module, req);
+}
+
+/* delete */
+static int linked_attributes_delete(struct ldb_module *module, struct ldb_request *req)
+{
+ return ldb_next_request(module, req);
+}
+
+/* rename */
+static int linked_attributes_rename(struct ldb_module *module, struct ldb_request *req)
+{
+ return ldb_next_request(module, req);
+}
+
+static int linked_attributes_wait_none(struct ldb_handle *handle) {
+ struct linked_attributes_context *ac;
+ int i, ret = LDB_ERR_OPERATIONS_ERROR;
+ 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 linked_attributes_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;
+ }
+ }
+
+done:
+ handle->state = LDB_ASYNC_DONE;
+ return ret;
+
+}
+
+static int linked_attributes_wait_all(struct ldb_handle *handle) {
+
+ int ret;
+
+ while (handle->state != LDB_ASYNC_DONE) {
+ ret = linked_attributes_wait_none(handle);
+ if (ret != LDB_SUCCESS) {
+ return ret;
+ }
+ }
+
+ return handle->status;
+}
+
+static int linked_attributes_wait(struct ldb_handle *handle, enum ldb_wait_type type)
+{
+ if (type == LDB_WAIT_ALL) {
+ return linked_attributes_wait_all(handle);
+ } else {
+ return linked_attributes_wait_none(handle);
+ }
+}
+
+static const struct ldb_module_ops linked_attributes_ops = {
+ .name = "linked_attributes",
+ .add = linked_attributes_add,
+ .modify = linked_attributes_modify,
+ .del = linked_attributes_delete,
+ .rename = linked_attributes_rename,
+ .wait = linked_attributes_wait,
+};
+
+int ldb_linked_attributes_init(void)
+{
+ return ldb_register_module(&linked_attributes_ops);
+}
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