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    Copyright (C) Anatoliy Atanasov 2010
  10
  11    based on drepl_ridalloc.c
  12
  13    This program is free software; you can redistribute it and/or modify
  14    it under the terms of the GNU General Public License as published by
  15    the Free Software Foundation; either version 3 of the License, or
  16    (at your option) any later version.
  17
  18    This program is distributed in the hope that it will be useful,
  19    but WITHOUT ANY WARRANTY; without even the implied warranty of
  20    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21    GNU General Public License for more details.
  22
  23    You should have received a copy of the GNU General Public License
  24    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  25
  26 */
  27
  28 #include "includes.h"
  29 #include "dsdb/samdb/samdb.h"
  30 #include "smbd/service.h"
  31 #include "dsdb/repl/drepl_service.h"
  32 #include "param/param.h"
  33
  34 struct fsmo_role_state {
  35         struct irpc_message *msg;
  36         struct drepl_takeFSMORole *r;
  37 };
  38
  39 static void drepl_role_callback(struct dreplsrv_service *service,
  40                                 WERROR werr,
  41                                 enum drsuapi_DsExtendedError ext_err,
  42                                 void *cb_data)
  43 {
  44         struct fsmo_role_state *fsmo = talloc_get_type_abort(cb_data, struct fsmo_role_state);
  45         if (!W_ERROR_IS_OK(werr)) {
  46                 DEBUG(2,(__location__ ": Failed role transfer - %s - extended_ret[0x%X]\n",
  47                          win_errstr(werr), ext_err));
  48         } else {
  49                 DEBUG(2,(__location__ ": Successful role transfer\n"));
  50         }
  51         fsmo->r->out.result = werr;
  52         irpc_send_reply(fsmo->msg, NT_STATUS_OK);
  53 }
  54
  55 /*
  56   see which role is we are asked to assume, initialize data and send request
  57  */
  58 NTSTATUS drepl_take_FSMO_role(struct irpc_message *msg,
  59                               struct drepl_takeFSMORole *r)
  60 {
  61         struct dreplsrv_service *service = talloc_get_type(msg->private_data,
  62                                                            struct dreplsrv_service);
  63         struct ldb_dn *role_owner_dn, *fsmo_role_dn;
  64         TALLOC_CTX *tmp_ctx = talloc_new(service);
  65         uint64_t fsmo_info = 0;
  66         enum drsuapi_DsExtendedOperation extended_op = DRSUAPI_EXOP_NONE;
  67         WERROR werr;
  68         enum drepl_role_master role = r->in.role;
  69         struct fsmo_role_state *fsmo;
  70         bool is_us;
  71         int ret;
  72
  73         werr = dsdb_get_fsmo_role_info(tmp_ctx, service->samdb, role,
  74                                        &fsmo_role_dn, &role_owner_dn);
  75         if (!W_ERROR_IS_OK(werr)) {
  76                 talloc_free(tmp_ctx);
  77                 r->out.result = werr;
  78                 return NT_STATUS_OK;
  79         }
  80
  81         switch (role) {
  82         case DREPL_NAMING_MASTER:
  83         case DREPL_INFRASTRUCTURE_MASTER:
  84         case DREPL_SCHEMA_MASTER:
  85                 extended_op = DRSUAPI_EXOP_FSMO_REQ_ROLE;
  86                 break;
  87         case DREPL_RID_MASTER:
  88                 extended_op = DRSUAPI_EXOP_FSMO_RID_REQ_ROLE;
  89                 break;
  90         case DREPL_PDC_MASTER:
  91                 extended_op = DRSUAPI_EXOP_FSMO_REQ_PDC;
  92                 break;
  93         default:
  94                 DEBUG(0,("Unknown role %u in role transfer\n",
  95                          (unsigned)role));
  96                 /* IRPC messages are trusted, so this really should not happen */
  97                 smb_panic("Unknown role despite dsdb_get_fsmo_role_info success");
  98         }
  99
 100         ret = samdb_dn_is_our_ntdsa(service->samdb, role_owner_dn, &is_us);
 101         if (ret != LDB_SUCCESS) {
 102                 DEBUG(0,("FSMO role check failed (failed to confirm if our ntdsDsa) for DN %s and owner %s \n",
 103                          ldb_dn_get_linearized(fsmo_role_dn),
 104                          ldb_dn_get_linearized(role_owner_dn)));
 105                 talloc_free(tmp_ctx);
 106                 r->out.result = WERR_DS_DRA_INTERNAL_ERROR;
 107                 return NT_STATUS_OK;
 108         }
 109
 110         if (is_us) {
 111                 DEBUG(5,("FSMO role check failed, we already own DN %s with %s\n",
 112                          ldb_dn_get_linearized(fsmo_role_dn),
 113                          ldb_dn_get_linearized(role_owner_dn)));
 114                 r->out.result = WERR_OK;
 115                 talloc_free(tmp_ctx);
 116                 return NT_STATUS_OK;
 117         }
 118
 119         fsmo = talloc(msg, struct fsmo_role_state);
 120         NT_STATUS_HAVE_NO_MEMORY(fsmo);
 121
 122         fsmo->msg = msg;
 123         fsmo->r   = r;
 124
 125         werr = drepl_request_extended_op(service,
 126                                          fsmo_role_dn,
 127                                          role_owner_dn,
 128                                          extended_op,
 129                                          fsmo_info,
 130                                          0,
 131                                          drepl_role_callback,
 132                                          fsmo);
 133         if (!W_ERROR_IS_OK(werr)) {
 134                 r->out.result = werr;
 135                 talloc_free(tmp_ctx);
 136                 return NT_STATUS_OK;
 137         }
 138
 139         /* mark this message to be answered later */
 140         msg->defer_reply = true;
 141         dreplsrv_run_pending_ops(service);
 142         talloc_free(tmp_ctx);
 143         return NT_STATUS_OK;
 144 }