source4/dsdb/samdb/ldb_modules/show_deleted.c

   1 /*
   2    ldb database library
   3
   4    Copyright (C) Simo Sorce  2005
   5    Copyright (C) Stefan Metzmacher <metze@samba.org> 2007
   6    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2009
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 /*
  23  *  Name: ldb
  24  *
  25  *  Component: ldb deleted objects control module
  26  *
  27  *  Description: this module hides deleted objects, and returns them if the right control is there
  28  *
  29  *  Author: Stefan Metzmacher
  30  */
  31
  32 #include "includes.h"
  33 #include "ldb/include/ldb_module.h"
  34 #include "dsdb/samdb/samdb.h"
  35
  36
  37 static int show_deleted_search(struct ldb_module *module, struct ldb_request *req)
  38 {
  39         struct ldb_context *ldb;
  40         struct ldb_control *control;
  41         struct ldb_control **saved_controls;
  42         struct ldb_request *down_req;
  43         struct ldb_parse_tree *new_tree = req->op.search.tree;
  44         int ret;
  45
  46         ldb = ldb_module_get_ctx(module);
  47
  48         /* check if there's a show deleted control */
  49         control = ldb_request_get_control(req, LDB_CONTROL_SHOW_DELETED_OID);
  50
  51         if (! control) {
  52                 /* FIXME: we could use a constant tree here once we
  53                    are sure that no ldb modules modify trees
  54                    in-situ */
  55                 new_tree = talloc(req, struct ldb_parse_tree);
  56                 if (!new_tree) {
  57                         ldb_oom(ldb);
  58                         return LDB_ERR_OPERATIONS_ERROR;
  59                 }
  60                 new_tree->operation = LDB_OP_AND;
  61                 new_tree->u.list.num_elements = 2;
  62                 new_tree->u.list.elements = talloc_array(new_tree, struct ldb_parse_tree *, 2);
  63                 if (!new_tree->u.list.elements) {
  64                         ldb_oom(ldb);
  65                         return LDB_ERR_OPERATIONS_ERROR;
  66                 }
  67                 new_tree->u.list.elements[0] = talloc(new_tree->u.list.elements, struct ldb_parse_tree);
  68                 new_tree->u.list.elements[0]->operation = LDB_OP_NOT;
  69                 new_tree->u.list.elements[0]->u.isnot.child =
  70                         talloc(new_tree->u.list.elements, struct ldb_parse_tree);
  71                 if (!new_tree->u.list.elements[0]->u.isnot.child) {
  72                         ldb_oom(ldb);
  73                         return LDB_ERR_OPERATIONS_ERROR;
  74                 }
  75                 new_tree->u.list.elements[0]->u.isnot.child->operation = LDB_OP_EQUALITY;
  76                 new_tree->u.list.elements[0]->u.isnot.child->u.equality.attr = "isDeleted";
  77                 new_tree->u.list.elements[0]->u.isnot.child->u.equality.value = data_blob_string_const("TRUE");
  78                 new_tree->u.list.elements[1] = req->op.search.tree;
  79         }
  80
  81         ret = ldb_build_search_req_ex(&down_req, ldb, req,
  82                                       req->op.search.base,
  83                                       req->op.search.scope,
  84                                       new_tree,
  85                                       req->op.search.attrs,
  86                                       req->controls,
  87                                       req->context, req->callback,
  88                                       req);
  89         if (ret != LDB_SUCCESS) {
  90                 return ret;
  91         }
  92
  93         /* if a control is there remove if from the modified request */
  94         if (control && !save_controls(control, down_req, &saved_controls)) {
  95                 return LDB_ERR_OPERATIONS_ERROR;
  96         }
  97
  98         /* perform the search */
  99         return ldb_next_request(module, down_req);
 100 }
 101
 102 static int show_deleted_init(struct ldb_module *module)
 103 {
 104         struct ldb_context *ldb;
 105         int ret;
 106
 107         ldb = ldb_module_get_ctx(module);
 108
 109         ret = ldb_mod_register_control(module, LDB_CONTROL_SHOW_DELETED_OID);
 110         if (ret != LDB_SUCCESS) {
 111                 ldb_debug(ldb, LDB_DEBUG_ERROR,
 112                         "show_deleted: Unable to register control with rootdse!\n");
 113                 return LDB_ERR_OPERATIONS_ERROR;
 114         }
 115
 116         return ldb_next_init(module);
 117 }
 118
 119 _PUBLIC_ const struct ldb_module_ops ldb_show_deleted_module_ops = {
 120         .name              = "show_deleted",
 121         .search            = show_deleted_search,
 122         .init_context      = show_deleted_init
 123 };