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/*
ldb database library
Copyright (C) Andrew Bartlett <abartlet@samba.org> 2006-2007
Copyright (C) Andrew Tridgell <tridge@samba.org> 2009
Copyright (C) Stefan Metzmacher <metze@samba.org> 2007
Copyright (C) Simo Sorce <idra@samba.org> 2008
Copyright (C) Matthias Dieter Wallnöfer 2010
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 delete module
*
* Description: Delete of a subtree in LDB
*
* Author: Andrew Bartlett
*/
#include "includes.h"
#include <ldb.h>
#include <ldb_module.h>
#include "dsdb/samdb/ldb_modules/util.h"
#include "dsdb/common/util.h"
static int subtree_delete_sort(struct ldb_message **m1,
struct ldb_message **m2,
void *private_data)
{
struct ldb_dn *dn1 = (*m1)->dn;
struct ldb_dn *dn2 = (*m2)->dn;
/*
* This sorts in tree order, children first
*/
return ldb_dn_compare(dn1, dn2);
}
static int subtree_delete(struct ldb_module *module, struct ldb_request *req)
{
static const char * const attrs[] = { NULL };
struct ldb_result *res = NULL;
uint32_t flags;
unsigned int i;
int ret;
if (ldb_dn_is_special(req->op.del.dn)) {
/* do not manipulate our control entries */
return ldb_next_request(module, req);
}
/* see if we have any children */
ret = dsdb_module_search(module, req, &res, req->op.del.dn,
LDB_SCOPE_ONELEVEL, attrs,
DSDB_FLAG_NEXT_MODULE,
req,
"(objectClass=*)");
if (ret != LDB_SUCCESS) {
talloc_free(res);
return ret;
}
if (res->count == 0) {
talloc_free(res);
return ldb_next_request(module, req);
}
if (ldb_request_get_control(req, LDB_CONTROL_TREE_DELETE_OID) == NULL) {
/* Do not add any DN outputs to this error string!
* Some MMC consoles (eg release 2000) have a strange
* bug and prevent subtree deletes afterwards. */
ldb_asprintf_errstring(ldb_module_get_ctx(module),
"subtree_delete: Unable to "
"delete a non-leaf node "
"(it has %u children)!",
res->count);
talloc_free(res);
return LDB_ERR_NOT_ALLOWED_ON_NON_LEAF;
}
/*
* First we sort the results from the leaf to the root
*/
LDB_TYPESAFE_QSORT(res->msgs, res->count, NULL,
subtree_delete_sort);
/*
* we need to start from the top since other LDB modules could
* enforce constraints (eg "objectclass" and "samldb" do so).
*
* We pass DSDB_FLAG_AS_SYSTEM as the acl module above us
* has already checked for SEC_ADS_DELETE_TREE.
*/
flags = DSDB_FLAG_TOP_MODULE |
DSDB_FLAG_AS_SYSTEM |
DSDB_FLAG_TRUSTED |
DSDB_TREE_DELETE;
if (ldb_request_get_control(req, LDB_CONTROL_RELAX_OID) != NULL) {
flags |= DSDB_MODIFY_RELAX;
}
for (i = 0; i < res->count; i++) {
ret = dsdb_module_del(module, res->msgs[i]->dn, flags, req);
if (ret != LDB_SUCCESS) {
return ret;
}
}
talloc_free(res);
return ldb_next_request(module, req);
}
static int subtree_delete_init(struct ldb_module *module)
{
struct ldb_context *ldb;
int ret;
ldb = ldb_module_get_ctx(module);
ret = ldb_mod_register_control(module, LDB_CONTROL_TREE_DELETE_OID);
if (ret != LDB_SUCCESS) {
ldb_debug(ldb, LDB_DEBUG_ERROR,
"subtree_delete: Unable to register control with rootdse!\n");
return ldb_operr(ldb);
}
return ldb_next_init(module);
}
static const struct ldb_module_ops ldb_subtree_delete_module_ops = {
.name = "subtree_delete",
.init_context = subtree_delete_init,
.del = subtree_delete
};
int ldb_subtree_delete_module_init(const char *version)
{
LDB_MODULE_CHECK_VERSION(version);
return ldb_register_module(&ldb_subtree_delete_module_ops);
}
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