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 #undef DBGC_CLASS
  35 #define DBGC_CLASS            DBGC_DRS_REPL
  36
  37 struct fsmo_role_state {
  38         struct irpc_message *msg;
  39         struct drepl_takeFSMORole *r;
  40 };
  41
  42 static void drepl_role_callback(struct dreplsrv_service *service,
  43                                 WERROR werr,
  44                                 enum drsuapi_DsExtendedError ext_err,
  45                                 void *cb_data)
  46 {
  47         struct fsmo_role_state *fsmo = talloc_get_type_abort(cb_data, struct fsmo_role_state);
  48         if (!W_ERROR_IS_OK(werr)) {
  49                 DEBUG(2,(__location__ ": Failed role transfer - %s - extended_ret[0x%X]\n",
  50                          win_errstr(werr), ext_err));
  51         } else {
  52                 DEBUG(2,(__location__ ": Successful role transfer\n"));
  53         }
  54         fsmo->r->out.result = werr;
  55         irpc_send_reply(fsmo->msg, NT_STATUS_OK);
  56 }
  57
  58 /*
  59   see which role is we are asked to assume, initialize data and send request
  60  */
  61 NTSTATUS drepl_take_FSMO_role(struct irpc_message *msg,
  62                               struct drepl_takeFSMORole *r)
  63 {
  64         struct dreplsrv_service *service = talloc_get_type(msg->private_data,
  65                                                            struct dreplsrv_service);
  66         struct ldb_dn *role_owner_dn, *fsmo_role_dn;
  67         TALLOC_CTX *tmp_ctx = talloc_new(service);
  68         uint64_t fsmo_info = 0;
  69         enum drsuapi_DsExtendedOperation extended_op = DRSUAPI_EXOP_NONE;
  70         WERROR werr;
  71         enum drepl_role_master role = r->in.role;
  72         struct fsmo_role_state *fsmo;
  73         bool is_us;
  74         int ret;
  75
  76         werr = dsdb_get_fsmo_role_info(tmp_ctx, service->samdb, role,
  77                                        &fsmo_role_dn, &role_owner_dn);
  78         if (!W_ERROR_IS_OK(werr)) {
  79                 talloc_free(tmp_ctx);
  80                 r->out.result = werr;
  81                 return NT_STATUS_OK;
  82         }
  83
  84         switch (role) {
  85         case DREPL_NAMING_MASTER:
  86         case DREPL_INFRASTRUCTURE_MASTER:
  87         case DREPL_SCHEMA_MASTER:
  88                 extended_op = DRSUAPI_EXOP_FSMO_REQ_ROLE;
  89                 break;
  90         case DREPL_RID_MASTER:
  91                 extended_op = DRSUAPI_EXOP_FSMO_RID_REQ_ROLE;
  92                 break;
  93         case DREPL_PDC_MASTER:
  94                 extended_op = DRSUAPI_EXOP_FSMO_REQ_PDC;
  95                 break;
  96         default:
  97                 DEBUG(0,("Unknown role %u in role transfer\n",
  98                          (unsigned)role));
  99                 /* IRPC messages are trusted, so this really should not happen */
 100                 smb_panic("Unknown role despite dsdb_get_fsmo_role_info success");
 101         }
 102
 103         ret = samdb_dn_is_our_ntdsa(service->samdb, role_owner_dn, &is_us);
 104         if (ret != LDB_SUCCESS) {
 105                 DEBUG(0,("FSMO role check failed (failed to confirm if our ntdsDsa) for DN %s and owner %s \n",
 106                          ldb_dn_get_linearized(fsmo_role_dn),
 107                          ldb_dn_get_linearized(role_owner_dn)));
 108                 talloc_free(tmp_ctx);
 109                 r->out.result = WERR_DS_DRA_INTERNAL_ERROR;
 110                 return NT_STATUS_OK;
 111         }
 112
 113         if (is_us) {
 114                 DEBUG(5,("FSMO role check failed, we already own DN %s with %s\n",
 115                          ldb_dn_get_linearized(fsmo_role_dn),
 116                          ldb_dn_get_linearized(role_owner_dn)));
 117                 r->out.result = WERR_OK;
 118                 talloc_free(tmp_ctx);
 119                 return NT_STATUS_OK;
 120         }
 121
 122         fsmo = talloc(msg, struct fsmo_role_state);
 123         NT_STATUS_HAVE_NO_MEMORY(fsmo);
 124
 125         fsmo->msg = msg;
 126         fsmo->r   = r;
 127
 128         werr = drepl_request_extended_op(service,
 129                                          fsmo_role_dn,
 130                                          role_owner_dn,
 131                                          extended_op,
 132                                          fsmo_info,
 133                                          0,
 134                                          drepl_role_callback,
 135                                          fsmo);
 136         if (!W_ERROR_IS_OK(werr)) {
 137                 r->out.result = werr;
 138                 talloc_free(tmp_ctx);
 139                 return NT_STATUS_OK;
 140         }
 141
 142         /* mark this message to be answered later */
 143         msg->defer_reply = true;
 144         dreplsrv_run_pending_ops(service);
 145         talloc_free(tmp_ctx);
 146         return NT_STATUS_OK;
 147 }