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/*
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 "includes.h"
#include <ldb.h>
#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->type == LDB_REPLY_REFERRAL) {
return ldb_module_send_referral(ac->req, ares->referral);
}
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);
}
_PUBLIC_ const struct ldb_module_ops ldb_subtree_rename_module_ops = {
.name = "subtree_rename",
.rename = subtree_rename,
};
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