source4/dsdb/repl/drepl_fsmo.c

   1 /*
   2    Unix SMB/CIFS mplementation.
   3
   4    DSDB replication service - FSMO role change
   5
   6    Copyright (C) Nadezhda Ivanova 2010
   7    Copyright (C) Andrew Tridgell 2010
   8    Copyright (C) Andrew Bartlett 2010
   9
  10    based on drepl_ridalloc.c
  11
  12    This program is free software; you can redistribute it and/or modify
  13    it under the terms of the GNU General Public License as published by
  14    the Free Software Foundation; either version 3 of the License, or
  15    (at your option) any later version.
  16
  17    This program is distributed in the hope that it will be useful,
  18    but WITHOUT ANY WARRANTY; without even the implied warranty of
  19    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20    GNU General Public License for more details.
  21
  22    You should have received a copy of the GNU General Public License
  23    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  24
  25 */
  26
  27 #include "includes.h"
  28 #include "dsdb/samdb/samdb.h"
  29 #include "smbd/service.h"
  30 #include "dsdb/repl/drepl_service.h"
  31 #include "param/param.h"
  32 #include "lib/messaging/irpc.h"
  33 #include "librpc/gen_ndr/ndr_irpc.h"
  34
  35 static void drepl_role_callback(struct dreplsrv_service *service,
  36                                 WERROR werr,
  37                                 enum drsuapi_DsExtendedError ext_err,
  38                                 void *cb_data)
  39 {
  40         if (!W_ERROR_IS_OK(werr)) {
  41                 DEBUG(0,(__location__ ": Failed role transfer - %s - extended_ret[0x%X]\n",
  42                          win_errstr(werr), ext_err));
  43         } else {
  44                 DEBUG(0,(__location__ ": Successful role transfer\n"));
  45         }
  46 }
  47
  48 static bool fsmo_master_cmp(struct ldb_dn *ntds_dn, struct ldb_dn *role_owner_dn)
  49 {
  50         if (ldb_dn_compare(ntds_dn, role_owner_dn) == 0) {
  51                 DEBUG(0,("\nWe are the FSMO master.\n"));
  52                 return true;
  53         }
  54         return false;
  55 }
  56
  57 /*
  58   see which role is we are asked to assume, initialize data and send request
  59  */
  60 WERROR dreplsrv_fsmo_role_check(struct dreplsrv_service *service,
  61                                 uint32_t role)
  62 {
  63         struct ldb_dn *role_owner_dn, *fsmo_role_dn, *ntds_dn;
  64         TALLOC_CTX *tmp_ctx = talloc_new(service);
  65         struct ldb_context *ldb = service->samdb;
  66         int ret;
  67         uint64_t fsmo_info = 0;
  68         enum drsuapi_DsExtendedOperation extended_op = DRSUAPI_EXOP_NONE;
  69         WERROR werr;
  70
  71         ntds_dn = samdb_ntds_settings_dn(ldb);
  72         if (!ntds_dn) {
  73                 return WERR_DS_DRA_INTERNAL_ERROR;
  74         }
  75
  76         switch (role) {
  77         case DREPL_NAMING_MASTER:
  78                 fsmo_role_dn = samdb_partitions_dn(ldb, tmp_ctx),
  79                 ret = samdb_reference_dn(ldb, tmp_ctx, fsmo_role_dn, "fSMORoleOwner", &role_owner_dn);
  80                 if (ret != LDB_SUCCESS) {
  81                         DEBUG(0,(__location__ ": Failed to find fSMORoleOwner in Naming Master object - %s",
  82                                  ldb_errstring(ldb)));
  83                         talloc_free(tmp_ctx);
  84                         return WERR_DS_DRA_INTERNAL_ERROR;
  85                 }
  86                 break;
  87         case DREPL_INFRASTRUCTURE_MASTER:
  88                 fsmo_role_dn = samdb_infrastructure_dn(ldb, tmp_ctx);
  89                 ret = samdb_reference_dn(ldb, tmp_ctx, fsmo_role_dn, "fSMORoleOwner", &role_owner_dn);
  90                 if (ret != LDB_SUCCESS) {
  91                         DEBUG(0,(__location__ ": Failed to find fSMORoleOwner in Schema Master object - %s",
  92                                  ldb_errstring(ldb)));
  93                         talloc_free(tmp_ctx);
  94                         return WERR_DS_DRA_INTERNAL_ERROR;
  95                 }
  96                 extended_op = DRSUAPI_EXOP_FSMO_REQ_ROLE;
  97                 break;
  98         case DREPL_RID_MASTER:
  99                 ret = samdb_rid_manager_dn(ldb, tmp_ctx, &fsmo_role_dn);
 100                 if (ret != LDB_SUCCESS) {
 101                         DEBUG(0, (__location__ ": Failed to find RID Manager object - %s", ldb_errstring(ldb)));
 102                         talloc_free(tmp_ctx);
 103                         return WERR_DS_DRA_INTERNAL_ERROR;
 104                 }
 105
 106                 ret = samdb_reference_dn(ldb, tmp_ctx, fsmo_role_dn, "fSMORoleOwner", &role_owner_dn);
 107                 if (ret != LDB_SUCCESS) {
 108                         DEBUG(0,(__location__ ": Failed to find fSMORoleOwner in RID Manager object - %s",
 109                                  ldb_errstring(ldb)));
 110                         talloc_free(tmp_ctx);
 111                         return WERR_DS_DRA_INTERNAL_ERROR;
 112                 }
 113                 extended_op = DRSUAPI_EXOP_FSMO_RID_REQ_ROLE;
 114                 break;
 115         case DREPL_SCHEMA_MASTER:
 116                 fsmo_role_dn = ldb_get_schema_basedn(ldb);
 117                 ret = samdb_reference_dn(ldb, tmp_ctx, fsmo_role_dn, "fSMORoleOwner", &role_owner_dn);
 118                 if (ret != LDB_SUCCESS) {
 119                         DEBUG(0,(__location__ ": Failed to find fSMORoleOwner in Schema Master object - %s",
 120                                  ldb_errstring(ldb)));
 121                         talloc_free(tmp_ctx);
 122                         return WERR_DS_DRA_INTERNAL_ERROR;
 123                 }
 124                 extended_op = DRSUAPI_EXOP_FSMO_REQ_ROLE;
 125                 break;
 126         case DREPL_PDC_MASTER:
 127                 fsmo_role_dn = ldb_get_default_basedn(ldb);
 128                 ret = samdb_reference_dn(ldb, tmp_ctx, fsmo_role_dn, "fSMORoleOwner", &role_owner_dn);
 129                 if (ret != LDB_SUCCESS) {
 130                         DEBUG(0,(__location__ ": Failed to find fSMORoleOwner in Pd Master object - %s",
 131                                  ldb_errstring(ldb)));
 132                         talloc_free(tmp_ctx);
 133                         return WERR_DS_DRA_INTERNAL_ERROR;
 134                 }
 135                 extended_op = DRSUAPI_EXOP_FSMO_REQ_PDC;
 136                 break;
 137         default:
 138                 return WERR_DS_DRA_INTERNAL_ERROR;
 139         }
 140
 141         if (fsmo_master_cmp(ntds_dn, role_owner_dn) ||
 142             (extended_op == DRSUAPI_EXOP_NONE)) {
 143                 DEBUG(0,("FSMO role check failed for DN %s and owner %s ",
 144                          ldb_dn_get_linearized(fsmo_role_dn),
 145                          ldb_dn_get_linearized(role_owner_dn)));
 146                 return WERR_OK;
 147         }
 148
 149         werr = drepl_request_extended_op(service,
 150                                          fsmo_role_dn,
 151                                          role_owner_dn,
 152                                          extended_op,
 153                                          fsmo_info,
 154                                          0,
 155                                          drepl_role_callback,
 156                                          NULL);
 157         if (W_ERROR_IS_OK(werr)) {
 158                 dreplsrv_run_pending_ops(service);
 159         } else {
 160                 DEBUG(0,("%s: drepl_request_extended_op() failed with %s",
 161                          __FUNCTION__, win_errstr(werr)));
 162         }
 163         return werr;
 164 }