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samba-mirror/lib/ldb/ldb_map/ldb_map_inbound.c
Andreas Schneider 3429e9d9e5 lib:ldb: Add FALL_THROUGH statements in ldb_map/ldb_map_inbound.c
Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2018-03-01 04:37:41 +01:00

847 lines
22 KiB
C

/*
ldb database mapping module
Copyright (C) Jelmer Vernooij 2005
Copyright (C) Martin Kuehl <mkhl@samba.org> 2006
Copyright (C) Simo Sorce <idra@samba.org> 2008
** 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/>.
*/
#include "replace.h"
#include "system/filesys.h"
#include "system/time.h"
#include "ldb_map.h"
#include "ldb_map_private.h"
/* Mapping message elements
* ======================== */
/* Map a message element into the remote partition. */
static struct ldb_message_element *ldb_msg_el_map_local(struct ldb_module *module, void *mem_ctx, const struct ldb_map_attribute *map, const struct ldb_message_element *old)
{
struct ldb_message_element *el;
unsigned int i;
el = talloc_zero(mem_ctx, struct ldb_message_element);
if (el == NULL) {
map_oom(module);
return NULL;
}
el->num_values = old->num_values;
el->values = talloc_array(el, struct ldb_val, el->num_values);
if (el->values == NULL) {
talloc_free(el);
map_oom(module);
return NULL;
}
el->name = map_attr_map_local(el, map, old->name);
for (i = 0; i < el->num_values; i++) {
el->values[i] = ldb_val_map_local(module, el->values, map, &old->values[i]);
}
return el;
}
/* Add a message element either to a local or to a remote message,
* depending on whether it goes into the local or remote partition. */
static int ldb_msg_el_partition(struct ldb_module *module, enum ldb_request_type optype, struct ldb_message *local, struct ldb_message *remote, const struct ldb_message *msg, const char *attr_name, /* const char * const names[], */ const struct ldb_message_element *old)
{
const struct ldb_map_context *data = map_get_context(module);
const struct ldb_map_attribute *map = map_attr_find_local(data, attr_name);
struct ldb_message_element *el=NULL;
struct ldb_context *ldb = ldb_module_get_ctx(module);
/* Unknown attribute: ignore */
if (map == NULL) {
ldb_debug(ldb, LDB_DEBUG_WARNING, "ldb_map: "
"Not mapping attribute '%s': no mapping found",
old->name);
goto local;
}
switch (map->type) {
case LDB_MAP_RENDROP:
if (optype != LDB_ADD) {
/* do the same as LDB_MAP_RENAME */
el = ldb_msg_el_map_local(module, remote, map, old);
break;
}
FALL_THROUGH;
case LDB_MAP_IGNORE:
goto local;
case LDB_MAP_CONVERT:
if (map->u.convert.convert_local == NULL) {
ldb_debug(ldb, LDB_DEBUG_WARNING, "ldb_map: "
"Not mapping attribute '%s': "
"'convert_local' not set",
map->local_name);
goto local;
}
FALL_THROUGH;
case LDB_MAP_KEEP:
case LDB_MAP_RENAME:
el = ldb_msg_el_map_local(module, remote, map, old);
break;
case LDB_MAP_GENERATE:
if (map->u.generate.generate_remote == NULL) {
ldb_debug(ldb, LDB_DEBUG_WARNING, "ldb_map: "
"Not mapping attribute '%s': "
"'generate_remote' not set",
map->local_name);
goto local;
}
/* TODO: if this attr requires context:
* make sure all context attrs are mappable (in 'names')
* make sure all context attrs have already been mapped?
* maybe postpone generation until they have been mapped?
*/
map->u.generate.generate_remote(module, map->local_name, msg, remote, local);
return 0;
}
if (el == NULL) {
return -1;
}
return ldb_msg_add(remote, el, old->flags);
local:
el = talloc(local, struct ldb_message_element);
if (el == NULL) {
map_oom(module);
return -1;
}
*el = *old; /* copy the old element */
return ldb_msg_add(local, el, old->flags);
}
/* Mapping messages
* ================ */
/* Check whether a message will be (partially) mapped into the remote partition. */
static bool ldb_msg_check_remote(struct ldb_module *module, const struct ldb_message *msg)
{
const struct ldb_map_context *data = map_get_context(module);
bool ret;
unsigned int i;
for (i = 0; i < msg->num_elements; i++) {
ret = map_attr_check_remote(data, msg->elements[i].name);
if (ret) {
return ret;
}
}
return false;
}
/* Split message elements that stay in the local partition from those
* that are mapped into the remote partition. */
static int ldb_msg_partition(struct ldb_module *module, enum ldb_request_type optype, struct ldb_message *local, struct ldb_message *remote, const struct ldb_message *msg)
{
/* const char * const names[]; */
struct ldb_context *ldb;
unsigned int i;
int ret;
ldb = ldb_module_get_ctx(module);
for (i = 0; i < msg->num_elements; i++) {
/* Skip 'IS_MAPPED' */
if (ldb_attr_cmp(msg->elements[i].name, IS_MAPPED) == 0) {
ldb_debug(ldb, LDB_DEBUG_WARNING, "ldb_map: "
"Skipping attribute '%s'",
msg->elements[i].name);
continue;
}
ret = ldb_msg_el_partition(module, optype, local, remote, msg, msg->elements[i].name, &msg->elements[i]);
if (ret) {
return ret;
}
}
return 0;
}
static int map_add_do_local(struct map_context *ac);
static int map_modify_do_local(struct map_context *ac);
static int map_delete_do_local(struct map_context *ac);
static int map_rename_do_local(struct map_context *ac);
static int map_rename_do_fixup(struct map_context *ac);
static int map_rename_local_callback(struct ldb_request *req,
struct ldb_reply *ares);
/*****************************************************************************
* COMMON INBOUND functions
*****************************************************************************/
/* Store the DN of a single search result in context. */
static int map_search_self_callback(struct ldb_request *req, struct ldb_reply *ares)
{
struct ldb_context *ldb;
struct map_context *ac;
int ret;
ac = talloc_get_type(req->context, struct map_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);
}
/* We are interested only in the single reply */
switch(ares->type) {
case LDB_REPLY_ENTRY:
/* We have already found a remote DN */
if (ac->local_dn) {
ldb_set_errstring(ldb,
"Too many results!");
return ldb_module_done(ac->req, NULL, NULL,
LDB_ERR_OPERATIONS_ERROR);
}
/* Store local DN */
ac->local_dn = talloc_steal(ac, ares->message->dn);
break;
case LDB_REPLY_DONE:
switch (ac->req->operation) {
case LDB_MODIFY:
ret = map_modify_do_local(ac);
break;
case LDB_DELETE:
ret = map_delete_do_local(ac);
break;
case LDB_RENAME:
ret = map_rename_do_local(ac);
break;
default:
/* if we get here we have definitely a problem */
ret = LDB_ERR_OPERATIONS_ERROR;
}
if (ret != LDB_SUCCESS) {
return ldb_module_done(ac->req, NULL, NULL,
LDB_ERR_OPERATIONS_ERROR);
}
default:
/* ignore referrals */
break;
}
talloc_free(ares);
return LDB_SUCCESS;
}
/* Build a request to search the local record by its DN. */
static int map_search_self_req(struct ldb_request **req,
struct map_context *ac,
struct ldb_dn *dn)
{
/* attrs[] is returned from this function in
* ac->search_req->op.search.attrs, so it must be static, as
* otherwise the compiler can put it on the stack */
static const char * const attrs[] = { IS_MAPPED, NULL };
struct ldb_parse_tree *tree;
/* Limit search to records with 'IS_MAPPED' present */
tree = ldb_parse_tree(ac, "(" IS_MAPPED "=*)");
if (tree == NULL) {
map_oom(ac->module);
return LDB_ERR_OPERATIONS_ERROR;
}
*req = map_search_base_req(ac, dn, attrs, tree,
ac, map_search_self_callback);
if (*req == NULL) {
return LDB_ERR_OPERATIONS_ERROR;
}
return LDB_SUCCESS;
}
static int map_op_local_callback(struct ldb_request *req,
struct ldb_reply *ares)
{
struct ldb_context *ldb;
struct map_context *ac;
int ret;
ac = talloc_get_type(req->context, struct map_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_asprintf_errstring(ldb, "Invalid LDB reply type %d", ares->type);
return ldb_module_done(ac->req, NULL, NULL,
LDB_ERR_OPERATIONS_ERROR);
}
/* Do the remote request. */
ret = ldb_next_remote_request(ac->module, ac->remote_req);
if (ret != LDB_SUCCESS) {
return ldb_module_done(ac->req, NULL, NULL,
LDB_ERR_OPERATIONS_ERROR);
}
return LDB_SUCCESS;
}
static int map_op_remote_callback(struct ldb_request *req,
struct ldb_reply *ares)
{
struct ldb_context *ldb;
struct map_context *ac;
ac = talloc_get_type(req->context, struct map_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_asprintf_errstring(ldb, "Invalid LDB reply type %d", ares->type);
return ldb_module_done(ac->req, NULL, NULL,
LDB_ERR_OPERATIONS_ERROR);
}
return ldb_module_done(ac->req, ares->controls,
ares->response, ares->error);
}
/*****************************************************************************
* ADD operations
*****************************************************************************/
/* Add a record. */
int ldb_map_add(struct ldb_module *module, struct ldb_request *req)
{
const struct ldb_message *msg = req->op.add.message;
struct ldb_context *ldb;
struct map_context *ac;
struct ldb_message *remote_msg;
int ret;
ldb = ldb_module_get_ctx(module);
/* Do not manipulate our control entries */
if (ldb_dn_is_special(msg->dn)) {
return ldb_next_request(module, req);
}
/* No mapping requested (perhaps no DN mapping specified), skip to next module */
if (!ldb_dn_check_local(module, msg->dn)) {
return ldb_next_request(module, req);
}
/* No mapping needed, fail */
if (!ldb_msg_check_remote(module, msg)) {
return LDB_ERR_OPERATIONS_ERROR;
}
/* Prepare context and handle */
ac = map_init_context(module, req);
if (ac == NULL) {
return LDB_ERR_OPERATIONS_ERROR;
}
/* Prepare the local message */
ac->local_msg = ldb_msg_new(ac);
if (ac->local_msg == NULL) {
map_oom(module);
return LDB_ERR_OPERATIONS_ERROR;
}
ac->local_msg->dn = msg->dn;
/* Prepare the remote message */
remote_msg = ldb_msg_new(ac);
if (remote_msg == NULL) {
map_oom(module);
return LDB_ERR_OPERATIONS_ERROR;
}
remote_msg->dn = ldb_dn_map_local(ac->module, remote_msg, msg->dn);
/* Split local from remote message */
ldb_msg_partition(module, req->operation, ac->local_msg, remote_msg, msg);
/* Prepare the remote operation */
ret = ldb_build_add_req(&ac->remote_req, ldb,
ac, remote_msg,
req->controls,
ac, map_op_remote_callback,
req);
LDB_REQ_SET_LOCATION(ac->remote_req);
if (ret != LDB_SUCCESS) {
return LDB_ERR_OPERATIONS_ERROR;
}
if ((ac->local_msg->num_elements == 0) ||
( ! map_check_local_db(ac->module))) {
/* No local data or db, just run the remote request */
return ldb_next_remote_request(ac->module, ac->remote_req);
}
/* Store remote DN in 'IS_MAPPED' */
/* TODO: use GUIDs here instead */
ret = ldb_msg_add_linearized_dn(ac->local_msg, IS_MAPPED,
remote_msg->dn);
if (ret != LDB_SUCCESS) {
return LDB_ERR_OPERATIONS_ERROR;
}
return map_add_do_local(ac);
}
/* Add the local record. */
static int map_add_do_local(struct map_context *ac)
{
struct ldb_request *local_req;
struct ldb_context *ldb;
int ret;
ldb = ldb_module_get_ctx(ac->module);
/* Prepare the local operation */
ret = ldb_build_add_req(&local_req, ldb, ac,
ac->local_msg,
ac->req->controls,
ac,
map_op_local_callback,
ac->req);
LDB_REQ_SET_LOCATION(local_req);
if (ret != LDB_SUCCESS) {
return LDB_ERR_OPERATIONS_ERROR;
}
return ldb_next_request(ac->module, local_req);
}
/*****************************************************************************
* MODIFY operations
*****************************************************************************/
/* Modify a record. */
int ldb_map_modify(struct ldb_module *module, struct ldb_request *req)
{
const struct ldb_message *msg = req->op.mod.message;
struct ldb_request *search_req = NULL;
struct ldb_message *remote_msg;
struct ldb_context *ldb;
struct map_context *ac;
int ret;
ldb = ldb_module_get_ctx(module);
/* Do not manipulate our control entries */
if (ldb_dn_is_special(msg->dn)) {
return ldb_next_request(module, req);
}
/* No mapping requested (perhaps no DN mapping specified), skip to next module */
if (!ldb_dn_check_local(module, msg->dn)) {
return ldb_next_request(module, req);
}
/* No mapping needed, skip to next module */
/* TODO: What if the remote part exists, the local doesn't,
* and this request wants to modify local data and thus
* add the local record? */
if (!ldb_msg_check_remote(module, msg)) {
return LDB_ERR_OPERATIONS_ERROR;
}
/* Prepare context and handle */
ac = map_init_context(module, req);
if (ac == NULL) {
return LDB_ERR_OPERATIONS_ERROR;
}
/* Prepare the local message */
ac->local_msg = ldb_msg_new(ac);
if (ac->local_msg == NULL) {
map_oom(module);
return LDB_ERR_OPERATIONS_ERROR;
}
ac->local_msg->dn = msg->dn;
/* Prepare the remote message */
remote_msg = ldb_msg_new(ac->remote_req);
if (remote_msg == NULL) {
map_oom(module);
return LDB_ERR_OPERATIONS_ERROR;
}
remote_msg->dn = ldb_dn_map_local(ac->module, remote_msg, msg->dn);
/* Split local from remote message */
ldb_msg_partition(module, req->operation, ac->local_msg, remote_msg, msg);
/* Prepare the remote operation */
ret = ldb_build_mod_req(&ac->remote_req, ldb,
ac, remote_msg,
req->controls,
ac, map_op_remote_callback,
req);
LDB_REQ_SET_LOCATION(ac->remote_req);
if (ret != LDB_SUCCESS) {
return LDB_ERR_OPERATIONS_ERROR;
}
if ((ac->local_msg->num_elements == 0) ||
( ! map_check_local_db(ac->module))) {
/* No local data or db, just run the remote request */
return ldb_next_remote_request(ac->module, ac->remote_req);
}
/* prepare the search operation */
ret = map_search_self_req(&search_req, ac, msg->dn);
if (ret != LDB_SUCCESS) {
return LDB_ERR_OPERATIONS_ERROR;
}
return ldb_next_request(module, search_req);
}
/* Modify the local record. */
static int map_modify_do_local(struct map_context *ac)
{
struct ldb_request *local_req;
struct ldb_context *ldb;
int ret;
ldb = ldb_module_get_ctx(ac->module);
if (ac->local_dn == NULL) {
/* No local record present, add it instead */
/* Add local 'IS_MAPPED' */
/* TODO: use GUIDs here instead */
if (ldb_msg_add_empty(ac->local_msg, IS_MAPPED,
LDB_FLAG_MOD_ADD, NULL) != 0) {
return LDB_ERR_OPERATIONS_ERROR;
}
ret = ldb_msg_add_linearized_dn(ac->local_msg, IS_MAPPED,
ac->remote_req->op.mod.message->dn);
if (ret != 0) {
return LDB_ERR_OPERATIONS_ERROR;
}
/* Prepare the local operation */
ret = ldb_build_add_req(&local_req, ldb, ac,
ac->local_msg,
ac->req->controls,
ac,
map_op_local_callback,
ac->req);
LDB_REQ_SET_LOCATION(local_req);
if (ret != LDB_SUCCESS) {
return LDB_ERR_OPERATIONS_ERROR;
}
} else {
/* Prepare the local operation */
ret = ldb_build_mod_req(&local_req, ldb, ac,
ac->local_msg,
ac->req->controls,
ac,
map_op_local_callback,
ac->req);
LDB_REQ_SET_LOCATION(local_req);
if (ret != LDB_SUCCESS) {
return LDB_ERR_OPERATIONS_ERROR;
}
}
return ldb_next_request(ac->module, local_req);
}
/*****************************************************************************
* DELETE operations
*****************************************************************************/
/* Delete a record. */
int ldb_map_delete(struct ldb_module *module, struct ldb_request *req)
{
struct ldb_request *search_req;
struct ldb_context *ldb;
struct map_context *ac;
int ret;
ldb = ldb_module_get_ctx(module);
/* Do not manipulate our control entries */
if (ldb_dn_is_special(req->op.del.dn)) {
return ldb_next_request(module, req);
}
/* No mapping requested (perhaps no DN mapping specified).
* Skip to next module */
if (!ldb_dn_check_local(module, req->op.del.dn)) {
return ldb_next_request(module, req);
}
/* Prepare context and handle */
ac = map_init_context(module, req);
if (ac == NULL) {
return LDB_ERR_OPERATIONS_ERROR;
}
/* Prepare the remote operation */
ret = ldb_build_del_req(&ac->remote_req, ldb, ac,
ldb_dn_map_local(module, ac, req->op.del.dn),
req->controls,
ac,
map_op_remote_callback,
req);
LDB_REQ_SET_LOCATION(ac->remote_req);
if (ret != LDB_SUCCESS) {
return LDB_ERR_OPERATIONS_ERROR;
}
/* No local db, just run the remote request */
if (!map_check_local_db(ac->module)) {
/* Do the remote request. */
return ldb_next_remote_request(ac->module, ac->remote_req);
}
/* Prepare the search operation */
ret = map_search_self_req(&search_req, ac, req->op.del.dn);
if (ret != LDB_SUCCESS) {
map_oom(module);
return LDB_ERR_OPERATIONS_ERROR;
}
return ldb_next_request(module, search_req);
}
/* Delete the local record. */
static int map_delete_do_local(struct map_context *ac)
{
struct ldb_request *local_req;
struct ldb_context *ldb;
int ret;
ldb = ldb_module_get_ctx(ac->module);
/* No local record, continue remotely */
if (ac->local_dn == NULL) {
/* Do the remote request. */
return ldb_next_remote_request(ac->module, ac->remote_req);
}
/* Prepare the local operation */
ret = ldb_build_del_req(&local_req, ldb, ac,
ac->req->op.del.dn,
ac->req->controls,
ac,
map_op_local_callback,
ac->req);
LDB_REQ_SET_LOCATION(local_req);
if (ret != LDB_SUCCESS) {
return LDB_ERR_OPERATIONS_ERROR;
}
return ldb_next_request(ac->module, local_req);
}
/*****************************************************************************
* RENAME operations
*****************************************************************************/
/* Rename a record. */
int ldb_map_rename(struct ldb_module *module, struct ldb_request *req)
{
struct ldb_request *search_req = NULL;
struct ldb_context *ldb;
struct map_context *ac;
int ret;
ldb = ldb_module_get_ctx(module);
/* Do not manipulate our control entries */
if (ldb_dn_is_special(req->op.rename.olddn)) {
return ldb_next_request(module, req);
}
/* No mapping requested (perhaps no DN mapping specified).
* Skip to next module */
if ((!ldb_dn_check_local(module, req->op.rename.olddn)) &&
(!ldb_dn_check_local(module, req->op.rename.newdn))) {
return ldb_next_request(module, req);
}
/* Rename into/out of the mapped partition requested, bail out */
if (!ldb_dn_check_local(module, req->op.rename.olddn) ||
!ldb_dn_check_local(module, req->op.rename.newdn)) {
return LDB_ERR_AFFECTS_MULTIPLE_DSAS;
}
/* Prepare context and handle */
ac = map_init_context(module, req);
if (ac == NULL) {
return LDB_ERR_OPERATIONS_ERROR;
}
/* Prepare the remote operation */
ret = ldb_build_rename_req(&ac->remote_req, ldb, ac,
ldb_dn_map_local(module, ac, req->op.rename.olddn),
ldb_dn_map_local(module, ac, req->op.rename.newdn),
req->controls,
ac, map_op_remote_callback,
req);
LDB_REQ_SET_LOCATION(ac->remote_req);
if (ret != LDB_SUCCESS) {
return LDB_ERR_OPERATIONS_ERROR;
}
/* No local db, just run the remote request */
if (!map_check_local_db(ac->module)) {
/* Do the remote request. */
return ldb_next_remote_request(ac->module, ac->remote_req);
}
/* Prepare the search operation */
ret = map_search_self_req(&search_req, ac, req->op.rename.olddn);
if (ret != LDB_SUCCESS) {
map_oom(module);
return LDB_ERR_OPERATIONS_ERROR;
}
return ldb_next_request(module, search_req);
}
/* Rename the local record. */
static int map_rename_do_local(struct map_context *ac)
{
struct ldb_request *local_req;
struct ldb_context *ldb;
int ret;
ldb = ldb_module_get_ctx(ac->module);
/* No local record, continue remotely */
if (ac->local_dn == NULL) {
/* Do the remote request. */
return ldb_next_remote_request(ac->module, ac->remote_req);
}
/* Prepare the local operation */
ret = ldb_build_rename_req(&local_req, ldb, ac,
ac->req->op.rename.olddn,
ac->req->op.rename.newdn,
ac->req->controls,
ac,
map_rename_local_callback,
ac->req);
LDB_REQ_SET_LOCATION(local_req);
if (ret != LDB_SUCCESS) {
return LDB_ERR_OPERATIONS_ERROR;
}
return ldb_next_request(ac->module, local_req);
}
static int map_rename_local_callback(struct ldb_request *req,
struct ldb_reply *ares)
{
struct ldb_context *ldb;
struct map_context *ac;
int ret;
ac = talloc_get_type(req->context, struct map_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_asprintf_errstring(ldb, "Invalid LDB reply type %d", ares->type);
return ldb_module_done(ac->req, NULL, NULL,
LDB_ERR_OPERATIONS_ERROR);
}
/* proceed with next step */
ret = map_rename_do_fixup(ac);
if (ret != LDB_SUCCESS) {
return ldb_module_done(ac->req, NULL, NULL,
LDB_ERR_OPERATIONS_ERROR);
}
return LDB_SUCCESS;
}
/* Update the local 'IS_MAPPED' attribute. */
static int map_rename_do_fixup(struct map_context *ac)
{
struct ldb_request *local_req;
/* Prepare the fixup operation */
/* TODO: use GUIDs here instead -- or skip it when GUIDs are used. */
local_req = map_build_fixup_req(ac,
ac->req->op.rename.newdn,
ac->remote_req->op.rename.newdn,
ac,
map_op_local_callback);
if (local_req == NULL) {
return LDB_ERR_OPERATIONS_ERROR;
}
return ldb_next_request(ac->module, local_req);
}