#include "dlinklist.h"
#include "dsdb/samdb/samdb.h"
+struct la_private {
+ struct la_context *la_list;
+};
+
struct la_op_store {
struct la_op_store *next;
struct la_op_store *prev;
};
struct la_context {
+ struct la_context *next, *prev;
const struct dsdb_schema *schema;
struct ldb_module *module;
struct ldb_request *req;
+ struct ldb_dn *partition_dn;
struct ldb_dn *add_dn;
struct ldb_dn *del_dn;
struct replace_context *rc;
{
struct ldb_context *ldb;
struct la_context *ac;
+ const struct ldb_control *partition_ctrl;
ldb = ldb_module_get_ctx(module);
ac->module = module;
ac->req = req;
+ /* remember the partition DN that came in, if given */
+ 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);
+ SMB_ASSERT(partition && partition->version == DSDB_CONTROL_CURRENT_PARTITION_VERSION);
+
+ ac->partition_dn = ldb_dn_copy(ac, partition->dn);
+ }
+
return ac;
}
static int la_op_search_callback(struct ldb_request *req,
struct ldb_reply *ares);
-static int la_do_mod_request(struct la_context *ac);
-static int la_mod_callback(struct ldb_request *req,
- struct ldb_reply *ares);
+static int la_queue_mod_request(struct la_context *ac);
static int la_down_req(struct la_context *ac);
if (ac->req->operation == LDB_ADD) {
/* Start the modifies to the backlinks */
- ret = la_do_mod_request(ac);
+ ret = la_queue_mod_request(ac);
if (ret != LDB_SUCCESS) {
return ldb_module_done(ac->req, NULL, NULL,
case LDB_RENAME:
/* start the mod requests chain */
- ret = la_do_mod_request(ac);
+ ret = la_queue_mod_request(ac);
if (ret != LDB_SUCCESS) {
return ldb_module_done(ac->req, NULL, NULL,
ret);
return LDB_SUCCESS;
}
-/* do a linked attributes modify request */
-static int la_do_mod_request(struct la_context *ac)
+/* queue a linked attributes modify request in the la_private
+ structure */
+static int la_queue_mod_request(struct la_context *ac)
{
- struct ldb_message_element *ret_el;
- struct ldb_request *mod_req;
- struct ldb_message *new_msg;
- struct ldb_context *ldb;
- int ret;
-
- /* If we have no modifies in the queue, we are done! */
- if (!ac->ops) {
- return ldb_module_done(ac->req, ac->op_controls,
- ac->op_response, LDB_SUCCESS);
- }
+ struct la_private *la_private =
+ talloc_get_type(ldb_module_get_private(ac->module), struct la_private);
- ldb = ldb_module_get_ctx(ac->module);
-
- /* Create the modify request */
- new_msg = ldb_msg_new(ac);
- if (!new_msg) {
- ldb_oom(ldb);
- return LDB_ERR_OPERATIONS_ERROR;
- }
- new_msg->dn = ac->ops->dn;
-
- if (ac->ops->op == LA_OP_ADD) {
- ret = ldb_msg_add_empty(new_msg, ac->ops->name,
- LDB_FLAG_MOD_ADD, &ret_el);
- } else {
- ret = ldb_msg_add_empty(new_msg, ac->ops->name,
- LDB_FLAG_MOD_DELETE, &ret_el);
- }
- if (ret != LDB_SUCCESS) {
- return ret;
- }
- ret_el->values = talloc_array(new_msg, struct ldb_val, 1);
- if (!ret_el->values) {
- ldb_oom(ldb);
+ if (la_private == NULL) {
+ ldb_debug(ldb_module_get_ctx(ac->module), LDB_DEBUG_ERROR, __location__ ": No la_private transaction setup\n");
return LDB_ERR_OPERATIONS_ERROR;
}
- ret_el->num_values = 1;
- if (ac->ops->op == LA_OP_ADD) {
- ret_el->values[0] = data_blob_string_const(ldb_dn_get_extended_linearized(new_msg, ac->add_dn, 1));
- } else {
- ret_el->values[0] = data_blob_string_const(ldb_dn_get_extended_linearized(new_msg, ac->del_dn, 1));
- }
-#if 0
- ldb_debug(ldb, LDB_DEBUG_WARNING,
- "link on %s %s: %s %s\n",
- ldb_dn_get_linearized(new_msg->dn), ret_el->name,
- ret_el->values[0].data, ac->ops->op == LA_OP_ADD ? "added" : "deleted");
-#endif
+ talloc_steal(la_private, ac);
+ DLIST_ADD(la_private->la_list, ac);
- /* use ac->ops as the mem_ctx so that the request will be freed
- * in the callback as soon as completed */
- ret = ldb_build_mod_req(&mod_req, ldb, ac->ops,
- new_msg,
- NULL,
- ac, la_mod_callback,
- ac->req);
- if (ret != LDB_SUCCESS) {
- return ret;
- }
- talloc_steal(mod_req, new_msg);
-
- /* Run the new request */
- return ldb_next_request(ac->module, mod_req);
-}
-
-static int la_mod_callback(struct ldb_request *req, struct ldb_reply *ares)
-{
- struct la_context *ac;
- struct ldb_context *ldb;
- struct la_op_store *os;
-
- ac = talloc_get_type(req->context, struct la_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 ldb_reply_type in callback");
- talloc_free(ares);
- return ldb_module_done(ac->req, NULL, NULL,
- LDB_ERR_OPERATIONS_ERROR);
- }
-
- talloc_free(ares);
-
- os = ac->ops;
- DLIST_REMOVE(ac->ops, os);
-
- /* this frees the request too
- * DO NOT access 'req' after this point */
- talloc_free(os);
-
- return la_do_mod_request(ac);
+ return ldb_module_done(ac->req, ac->op_controls,
+ ac->op_response, LDB_SUCCESS);
}
/* Having done the original operation, then try to fix up all the linked attributes for modify and delete */
ac->op_response = talloc_steal(ac, ares->response);
/* If we have modfies to make, this is the time to do them for modify and delete */
- ret = la_do_mod_request(ac);
+ ret = la_queue_mod_request(ac);
if (ret != LDB_SUCCESS) {
return ldb_module_done(ac->req, NULL, NULL, ret);
}
talloc_free(ares);
- /* la_do_mod_request has already sent the callbacks */
+ /* la_queue_mod_request has already sent the callbacks */
return LDB_SUCCESS;
}
return ldb_next_request(ac->module, down_req);
}
+/*
+ use the GUID part of an extended DN to find the target DN, in case
+ it has moved
+ */
+static int la_find_dn_target(struct ldb_module *module, struct la_context *ac, struct ldb_dn **dn)
+{
+ const struct ldb_val *guid;
+ struct ldb_context *ldb;
+ int ret;
+ struct ldb_result *res;
+ const char *attrs[] = { NULL };
+ struct ldb_request *search_req;
+ char *expression;
+ struct ldb_search_options_control *options;
+
+ ldb = ldb_module_get_ctx(ac->module);
+
+ guid = ldb_dn_get_extended_component(*dn, "GUID");
+ if (guid == NULL) {
+ return LDB_SUCCESS;
+ }
+
+ expression = talloc_asprintf(ac, "objectGUID=%s", ldb_binary_encode(ac, *guid));
+ if (!expression) {
+ ldb_oom(ldb);
+ return LDB_ERR_OPERATIONS_ERROR;
+ }
+
+ res = talloc_zero(ac, struct ldb_result);
+ if (!res) {
+ ldb_oom(ldb);
+ return LDB_ERR_OPERATIONS_ERROR;
+ }
+
+ ret = ldb_build_search_req(&search_req, ldb, ac,
+ ldb_get_default_basedn(ldb),
+ LDB_SCOPE_SUBTREE,
+ expression, attrs,
+ NULL,
+ res, ldb_search_default_callback,
+ NULL);
+ if (ret != LDB_SUCCESS) {
+ return ret;
+ }
+
+ /* we need to cope with cross-partition links, so search for
+ the GUID over all partitions */
+ options = talloc(search_req, struct ldb_search_options_control);
+ if (options == NULL) {
+ ldb_oom(ldb);
+ return LDB_ERR_OPERATIONS_ERROR;
+ }
+ options->search_options = LDB_SEARCH_OPTION_PHANTOM_ROOT;
+
+ ret = ldb_request_add_control(search_req,
+ LDB_CONTROL_SEARCH_OPTIONS_OID,
+ true, options);
+ if (ret != LDB_SUCCESS) {
+ return ret;
+ }
+
+ ret = ldb_next_request(module, search_req);
+ if (ret != LDB_SUCCESS) {
+ return ret;
+ }
+
+ ret = ldb_wait(search_req->handle, LDB_WAIT_ALL);
+ if (ret != LDB_SUCCESS) {
+ ldb_debug(ldb, LDB_DEBUG_ERROR, "GUID search failed (%s) for %s\n",
+ ldb_errstring(ldb), ldb_dn_get_extended_linearized(ac, *dn, 1));
+ return ret;
+ }
+
+ /* this really should be exactly 1, but there is a bug in the
+ partitions module that can return two here with the
+ search_options control set */
+ if (res->count < 1) {
+ ldb_debug(ldb, LDB_DEBUG_ERROR, "GUID search gave count=%d for %s\n",
+ res->count, ldb_dn_get_extended_linearized(ac, *dn, 1));
+ return LDB_ERR_OPERATIONS_ERROR;
+ }
+
+ *dn = res->msgs[0]->dn;
+
+ return LDB_SUCCESS;
+}
+
+/* apply one la_context op change */
+static int la_do_op_request(struct ldb_module *module, struct la_context *ac, struct la_op_store *op)
+{
+ struct ldb_message_element *ret_el;
+ struct ldb_request *mod_req;
+ struct ldb_message *new_msg;
+ struct ldb_context *ldb;
+ int ret;
+
+ ldb = ldb_module_get_ctx(ac->module);
+
+ /* Create the modify request */
+ new_msg = ldb_msg_new(ac);
+ if (!new_msg) {
+ ldb_oom(ldb);
+ return LDB_ERR_OPERATIONS_ERROR;
+ }
+
+ new_msg->dn = op->dn;
+ ret = la_find_dn_target(module, ac, &new_msg->dn);
+ if (ret != LDB_SUCCESS) {
+ return ret;
+ }
+
+ if (op->op == LA_OP_ADD) {
+ ret = ldb_msg_add_empty(new_msg, op->name,
+ LDB_FLAG_MOD_ADD, &ret_el);
+ } else {
+ ret = ldb_msg_add_empty(new_msg, op->name,
+ LDB_FLAG_MOD_DELETE, &ret_el);
+ }
+ if (ret != LDB_SUCCESS) {
+ return ret;
+ }
+ ret_el->values = talloc_array(new_msg, struct ldb_val, 1);
+ if (!ret_el->values) {
+ ldb_oom(ldb);
+ return LDB_ERR_OPERATIONS_ERROR;
+ }
+ ret_el->num_values = 1;
+ if (op->op == LA_OP_ADD) {
+ ret_el->values[0] = data_blob_string_const(ldb_dn_get_extended_linearized(new_msg, ac->add_dn, 1));
+ } else {
+ ret_el->values[0] = data_blob_string_const(ldb_dn_get_extended_linearized(new_msg, ac->del_dn, 1));
+ }
+
+#if 0
+ ldb_debug(ldb, LDB_DEBUG_WARNING,
+ "link on %s %s: %s %s\n",
+ ldb_dn_get_linearized(new_msg->dn), ret_el->name,
+ ret_el->values[0].data, ac->ops->op == LA_OP_ADD ? "added" : "deleted");
+#endif
+
+ ret = ldb_build_mod_req(&mod_req, ldb, op,
+ new_msg,
+ NULL,
+ NULL,
+ ldb_op_default_callback,
+ NULL);
+ if (ret != LDB_SUCCESS) {
+ return ret;
+ }
+ talloc_steal(mod_req, new_msg);
+
+ if (DEBUGLVL(4)) {
+ DEBUG(4,("Applying linked attribute change:\n%s\n",
+ ldb_ldif_message_string(ldb, op, LDB_CHANGETYPE_MODIFY, new_msg)));
+ }
+
+ /* Run the new request */
+ ret = ldb_next_request(module, mod_req);
+
+ /* we need to wait for this to finish, as we are being called
+ from the synchronous end_transaction hook of this module */
+ if (ret == LDB_SUCCESS) {
+ ret = ldb_wait(mod_req->handle, LDB_WAIT_ALL);
+ }
+
+ if (ret != LDB_SUCCESS) {
+ ldb_debug(ldb, LDB_DEBUG_WARNING, "Failed to apply linked attribute change '%s' %s\n",
+ ldb_errstring(ldb),
+ ldb_ldif_message_string(ldb, op, LDB_CHANGETYPE_MODIFY, new_msg));
+ }
+
+ return ret;
+}
+
+/* apply one set of la_context changes */
+static int la_do_mod_request(struct ldb_module *module, struct la_context *ac)
+{
+ struct la_op_store *op;
+
+ for (op = ac->ops; op; op=op->next) {
+ int ret = la_do_op_request(module, ac, op);
+ if (ret != LDB_SUCCESS) {
+ return ret;
+ }
+ }
+
+ return LDB_SUCCESS;
+}
+
+
+/*
+ we hook into the transaction operations to allow us to
+ perform the linked attribute updates at the end of the whole
+ transaction. This allows a forward linked attribute to be created
+ before the target is created, as long as the target is created
+ in the same transaction
+ */
+static int linked_attributes_start_transaction(struct ldb_module *module)
+{
+ /* create our private structure for this transaction */
+ struct la_private *la_private = talloc_get_type(ldb_module_get_private(module),
+ struct la_private);
+ talloc_free(la_private);
+ la_private = talloc(module, struct la_private);
+ if (la_private == NULL) {
+ return LDB_ERR_OPERATIONS_ERROR;
+ }
+ la_private->la_list = NULL;
+ ldb_module_set_private(module, la_private);
+ return LDB_SUCCESS;
+}
+
+/*
+ on end transaction we loop over our queued la_context structures and
+ apply each of them
+ */
+static int linked_attributes_end_transaction(struct ldb_module *module)
+{
+ struct la_private *la_private =
+ talloc_get_type(ldb_module_get_private(module), struct la_private);
+ struct la_context *ac;
+
+ for (ac=la_private->la_list; ac; ac=ac->next) {
+ int ret;
+ ac->req = NULL;
+ ret = la_do_mod_request(module, ac);
+ if (ret != LDB_SUCCESS) {
+ ret = la_do_mod_request(module, ac);
+ return ret;
+ }
+ }
+
+ return LDB_SUCCESS;
+}
+
+static int linked_attributes_del_transaction(struct ldb_module *module)
+{
+ struct la_private *la_private =
+ talloc_get_type(ldb_module_get_private(module), struct la_private);
+ talloc_free(la_private);
+ ldb_module_set_private(module, NULL);
+ return LDB_SUCCESS;
+}
+
_PUBLIC_ const struct ldb_module_ops ldb_linked_attributes_module_ops = {
.name = "linked_attributes",
.modify = linked_attributes_modify,
.del = linked_attributes_del,
.rename = linked_attributes_rename,
+ .start_transaction = linked_attributes_start_transaction,
+ .end_transaction = linked_attributes_end_transaction,
+ .del_transaction = linked_attributes_del_transaction,
};
git.samba.org / gd / samba / .git / commitdiff