source4/dsdb/samdb/ldb_modules/naming_fsmo.c

   1 /*
   2    Unix SMB/CIFS mplementation.
   3
   4    The module that handles the Domain Naming FSMO Role Owner
   5    checkings
   6
   7    Copyright (C) Stefan Metzmacher 2007
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21
  22 */
  23
  24 #include "includes.h"
  25 #include "ldb_module.h"
  26 #include "dsdb/samdb/samdb.h"
  27 #include "librpc/gen_ndr/ndr_misc.h"
  28 #include "librpc/gen_ndr/ndr_drsuapi.h"
  29 #include "librpc/gen_ndr/ndr_drsblobs.h"
  30 #include "../lib/util/dlinklist.h"
  31 #include "dsdb/samdb/ldb_modules/util.h"
  32
  33 static int naming_fsmo_init(struct ldb_module *module)
  34 {
  35         struct ldb_context *ldb;
  36         TALLOC_CTX *mem_ctx;
  37         struct ldb_dn *naming_dn;
  38         struct dsdb_naming_fsmo *naming_fsmo;
  39         struct ldb_result *naming_res;
  40         int ret;
  41         static const char *naming_attrs[] = {
  42                 "fSMORoleOwner",
  43                 NULL
  44         };
  45
  46         ldb = ldb_module_get_ctx(module);
  47
  48         mem_ctx = talloc_new(module);
  49         if (!mem_ctx) {
  50                 ldb_oom(ldb);
  51                 return LDB_ERR_OPERATIONS_ERROR;
  52         }
  53
  54         naming_dn = samdb_partitions_dn(ldb, mem_ctx);
  55         if (!naming_dn) {
  56                 ldb_debug(ldb, LDB_DEBUG_WARNING,
  57                           "naming_fsmo_init: no partitions dn present: (skip loading of naming contexts details)\n");
  58                 talloc_free(mem_ctx);
  59                 return ldb_next_init(module);
  60         }
  61
  62         naming_fsmo = talloc_zero(mem_ctx, struct dsdb_naming_fsmo);
  63         if (!naming_fsmo) {
  64                 ldb_oom(ldb);
  65                 return LDB_ERR_OPERATIONS_ERROR;
  66         }
  67         ldb_module_set_private(module, naming_fsmo);
  68
  69         ret = dsdb_module_search_dn(module, mem_ctx, &naming_res,
  70                                     naming_dn,
  71                                     naming_attrs, 0);
  72         if (ret == LDB_ERR_NO_SUCH_OBJECT) {
  73                 ldb_debug(ldb, LDB_DEBUG_WARNING,
  74                           "naming_fsmo_init: no partitions dn present: (skip loading of naming contexts details)\n");
  75                 talloc_free(mem_ctx);
  76                 return ldb_next_init(module);
  77         }
  78
  79         naming_fsmo->master_dn = ldb_msg_find_attr_as_dn(ldb, naming_fsmo, naming_res->msgs[0], "fSMORoleOwner");
  80         if (ldb_dn_compare(samdb_ntds_settings_dn(ldb), naming_fsmo->master_dn) == 0) {
  81                 naming_fsmo->we_are_master = true;
  82         } else {
  83                 naming_fsmo->we_are_master = false;
  84         }
  85
  86         if (ldb_set_opaque(ldb, "dsdb_naming_fsmo", naming_fsmo) != LDB_SUCCESS) {
  87                 ldb_oom(ldb);
  88                 return LDB_ERR_OPERATIONS_ERROR;
  89         }
  90
  91         talloc_steal(module, naming_fsmo);
  92
  93         ldb_debug(ldb, LDB_DEBUG_TRACE,
  94                           "naming_fsmo_init: we are master: %s\n",
  95                           (naming_fsmo->we_are_master?"yes":"no"));
  96
  97         talloc_free(mem_ctx);
  98         return ldb_next_init(module);
  99 }
 100
 101 _PUBLIC_ const struct ldb_module_ops ldb_naming_fsmo_module_ops = {
 102         .name           = "naming_fsmo",
 103         .init_context   = naming_fsmo_init
 104 };