source4/dsdb/samdb/ldb_modules/subtree_delete.c

   1 /*
   2    ldb database library
   3
   4    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2006-2007
   5    Copyright (C) Andrew Tridgell <tridge@samba.org> 2009
   6    Copyright (C) Stefan Metzmacher <metze@samba.org> 2007
   7    Copyright (C) Simo Sorce <idra@samba.org> 2008
   8    Copyright (C) Matthias Dieter Wallnöfer 2010
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22 */
  23
  24 /*
  25  *  Name: ldb
  26  *
  27  *  Component: ldb subtree delete module
  28  *
  29  *  Description: Delete of a subtree in LDB
  30  *
  31  *  Author: Andrew Bartlett
  32  */
  33
  34 #include "includes.h"
  35 #include <ldb.h>
  36 #include <ldb_module.h>
  37 #include "dsdb/samdb/ldb_modules/util.h"
  38 #include "dsdb/common/util.h"
  39
  40
  41 static int subtree_delete(struct ldb_module *module, struct ldb_request *req)
  42 {
  43         static const char * const attrs[] = { NULL };
  44         struct ldb_result *res = NULL;
  45         uint32_t flags;
  46         unsigned int i;
  47         int ret;
  48
  49         if (ldb_dn_is_special(req->op.del.dn)) {
  50                 /* do not manipulate our control entries */
  51                 return ldb_next_request(module, req);
  52         }
  53
  54         /* see if we have any children */
  55         ret = dsdb_module_search(module, req, &res, req->op.del.dn,
  56                                  LDB_SCOPE_ONELEVEL, attrs,
  57                                  DSDB_FLAG_NEXT_MODULE,
  58                                  req,
  59                                  "(objectClass=*)");
  60         if (ret != LDB_SUCCESS) {
  61                 talloc_free(res);
  62                 return ret;
  63         }
  64         if (res->count == 0) {
  65                 talloc_free(res);
  66                 return ldb_next_request(module, req);
  67         }
  68
  69         if (ldb_request_get_control(req, LDB_CONTROL_TREE_DELETE_OID) == NULL) {
  70                 /* Do not add any DN outputs to this error string!
  71                  * Some MMC consoles (eg release 2000) have a strange
  72                  * bug and prevent subtree deletes afterwards. */
  73                 ldb_asprintf_errstring(ldb_module_get_ctx(module),
  74                                        "subtree_delete: Unable to "
  75                                        "delete a non-leaf node "
  76                                        "(it has %u children)!",
  77                                        res->count);
  78                 talloc_free(res);
  79                 return LDB_ERR_NOT_ALLOWED_ON_NON_LEAF;
  80         }
  81
  82         /*
  83          * we need to start from the top since other LDB modules could
  84          * enforce constraints (eg "objectclass" and "samldb" do so).
  85          *
  86          * We pass DSDB_FLAG_AS_SYSTEM as the acl module above us
  87          * has already checked for SEC_ADS_DELETE_TREE.
  88          */
  89         flags = DSDB_FLAG_TOP_MODULE |
  90                 DSDB_FLAG_AS_SYSTEM |
  91                 DSDB_FLAG_TRUSTED |
  92                 DSDB_TREE_DELETE;
  93         if (ldb_request_get_control(req, LDB_CONTROL_RELAX_OID) != NULL) {
  94                 flags |= DSDB_MODIFY_RELAX;
  95         }
  96
  97         for (i = 0; i < res->count; i++) {
  98                 ret = dsdb_module_del(module, res->msgs[i]->dn, flags, req);
  99                 if (ret != LDB_SUCCESS) {
 100                         return ret;
 101                 }
 102         }
 103
 104         talloc_free(res);
 105
 106         return ldb_next_request(module, req);
 107 }
 108
 109 static int subtree_delete_init(struct ldb_module *module)
 110 {
 111         struct ldb_context *ldb;
 112         int ret;
 113
 114         ldb = ldb_module_get_ctx(module);
 115
 116         ret = ldb_mod_register_control(module, LDB_CONTROL_TREE_DELETE_OID);
 117         if (ret != LDB_SUCCESS) {
 118                 ldb_debug(ldb, LDB_DEBUG_ERROR,
 119                         "subtree_delete: Unable to register control with rootdse!\n");
 120                 return ldb_operr(ldb);
 121         }
 122
 123         return ldb_next_init(module);
 124 }
 125
 126 static const struct ldb_module_ops ldb_subtree_delete_module_ops = {
 127         .name              = "subtree_delete",
 128         .init_context      = subtree_delete_init,
 129         .del               = subtree_delete
 130 };
 131
 132 int ldb_subtree_delete_module_init(const char *version)
 133 {
 134         LDB_MODULE_CHECK_VERSION(version);
 135         return ldb_register_module(&ldb_subtree_delete_module_ops);
 136 }