source4/dsdb/repl/drepl_extended.c

   1 /*
   2    Unix SMB/CIFS mplementation.
   3
   4    DSDB replication service - extended operation code
   5
   6    Copyright (C) Andrew Tridgell 2010
   7    Copyright (C) Andrew Bartlett 2010
   8    Copyright (C) Nadezhda Ivanova 2010
   9
  10    based on drepl_notify.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 "ldb_module.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
  35 /*
  36   create the role owner source dsa structure
  37
  38   nc_dn: the DN of the subtree being replicated
  39   source_dsa_dn: the DN of the server that we are replicating from
  40  */
  41 static WERROR drepl_create_extended_source_dsa(struct dreplsrv_service *service,
  42                                                TALLOC_CTX *mem_ctx,
  43                                                struct ldb_dn *nc_dn,
  44                                                struct ldb_dn *source_dsa_dn,
  45                                                uint64_t min_usn,
  46                                                struct dreplsrv_partition_source_dsa **_sdsa)
  47 {
  48         struct dreplsrv_partition_source_dsa *sdsa;
  49         struct ldb_context *ldb = service->samdb;
  50         int ret;
  51         WERROR werr;
  52         struct ldb_dn *nc_root;
  53         struct dreplsrv_partition *p;
  54
  55         sdsa = talloc_zero(service, struct dreplsrv_partition_source_dsa);
  56         W_ERROR_HAVE_NO_MEMORY(sdsa);
  57
  58         sdsa->partition = talloc_zero(sdsa, struct dreplsrv_partition);
  59         if (!sdsa->partition) {
  60                 talloc_free(sdsa);
  61                 return WERR_NOMEM;
  62         }
  63
  64         sdsa->partition->dn = ldb_dn_copy(sdsa->partition, nc_dn);
  65         if (!sdsa->partition->dn) {
  66                 talloc_free(sdsa);
  67                 return WERR_NOMEM;
  68         }
  69         sdsa->partition->nc.dn = ldb_dn_alloc_linearized(sdsa->partition, nc_dn);
  70         if (!sdsa->partition->nc.dn) {
  71                 talloc_free(sdsa);
  72                 return WERR_NOMEM;
  73         }
  74         ret = dsdb_find_guid_by_dn(ldb, nc_dn, &sdsa->partition->nc.guid);
  75         if (ret != LDB_SUCCESS) {
  76                 DEBUG(0,(__location__ ": Failed to find GUID for %s\n",
  77                          ldb_dn_get_linearized(nc_dn)));
  78                 talloc_free(sdsa);
  79                 return WERR_DS_DRA_INTERNAL_ERROR;
  80         }
  81
  82         sdsa->repsFrom1 = &sdsa->_repsFromBlob.ctr.ctr1;
  83         ret = dsdb_find_guid_by_dn(ldb, source_dsa_dn, &sdsa->repsFrom1->source_dsa_obj_guid);
  84         if (ret != LDB_SUCCESS) {
  85                 DEBUG(0,(__location__ ": Failed to find objectGUID for %s\n",
  86                          ldb_dn_get_linearized(source_dsa_dn)));
  87                 talloc_free(sdsa);
  88                 return WERR_DS_DRA_INTERNAL_ERROR;
  89         }
  90
  91         sdsa->repsFrom1->other_info = talloc_zero(sdsa, struct repsFromTo1OtherInfo);
  92         if (!sdsa->repsFrom1->other_info) {
  93                 talloc_free(sdsa);
  94                 return WERR_NOMEM;
  95         }
  96
  97         sdsa->repsFrom1->other_info->dns_name = samdb_ntds_msdcs_dns_name(ldb,
  98                                                                           sdsa->repsFrom1->other_info,
  99                                                                           &sdsa->repsFrom1->source_dsa_obj_guid);
 100         if (!sdsa->repsFrom1->other_info->dns_name) {
 101                 talloc_free(sdsa);
 102                 return WERR_NOMEM;
 103         }
 104
 105         werr = dreplsrv_out_connection_attach(service, sdsa->repsFrom1, &sdsa->conn);
 106         if (!W_ERROR_IS_OK(werr)) {
 107                 DEBUG(0,(__location__ ": Failed to attach connection to %s\n",
 108                          ldb_dn_get_linearized(nc_dn)));
 109                 talloc_free(sdsa);
 110                 return werr;
 111         }
 112
 113         ret = dsdb_find_nc_root(service->samdb, sdsa, nc_dn, &nc_root);
 114         if (ret != LDB_SUCCESS) {
 115                 DEBUG(0,(__location__ ": Failed to find nc_root for %s\n",
 116                          ldb_dn_get_linearized(nc_dn)));
 117                 talloc_free(sdsa);
 118                 return WERR_DS_DRA_INTERNAL_ERROR;
 119         }
 120
 121         /* use the partition uptodateness vector */
 122         ret = dsdb_load_udv_v2(service->samdb, nc_root, sdsa->partition,
 123                                &sdsa->partition->uptodatevector.cursors,
 124                                &sdsa->partition->uptodatevector.count);
 125         if (ret != LDB_SUCCESS) {
 126                 DEBUG(0,(__location__ ": Failed to load UDV for %s\n",
 127                          ldb_dn_get_linearized(nc_root)));
 128                 talloc_free(sdsa);
 129                 return WERR_DS_DRA_INTERNAL_ERROR;
 130         }
 131
 132         /* find the highwatermark from the partitions list */
 133         for (p=service->partitions; p; p=p->next) {
 134                 if (ldb_dn_compare(p->dn, nc_root) == 0) {
 135                         struct dreplsrv_partition_source_dsa *s;
 136                         werr = dreplsrv_partition_source_dsa_by_guid(p,
 137                                                                      &sdsa->repsFrom1->source_dsa_obj_guid,
 138                                                                      &s);
 139                         if (W_ERROR_IS_OK(werr)) {
 140                                 sdsa->repsFrom1->highwatermark = s->repsFrom1->highwatermark;
 141                                 sdsa->repsFrom1->replica_flags = s->repsFrom1->replica_flags;
 142                         }
 143                 }
 144         }
 145
 146         if (!service->am_rodc) {
 147                 sdsa->repsFrom1->replica_flags |= DRSUAPI_DRS_WRIT_REP;
 148         }
 149
 150         *_sdsa = sdsa;
 151         return WERR_OK;
 152 }
 153
 154 struct extended_op_data {
 155         dreplsrv_extended_callback_t callback;
 156         void *callback_data;
 157         struct dreplsrv_partition_source_dsa *sdsa;
 158 };
 159
 160 /*
 161   called when an extended op finishes
 162  */
 163 static void extended_op_callback(struct dreplsrv_service *service,
 164                                  WERROR err,
 165                                  enum drsuapi_DsExtendedError exop_error,
 166                                  void *cb_data)
 167 {
 168         struct extended_op_data *data = talloc_get_type_abort(cb_data, struct extended_op_data);
 169         talloc_unlink(data, data->sdsa);
 170         data->callback(service, err, exop_error, data->callback_data);
 171         talloc_free(data);
 172 }
 173
 174 /*
 175   schedule a getncchanges request to the role owner for an extended operation
 176  */
 177 WERROR drepl_request_extended_op(struct dreplsrv_service *service,
 178                                  struct ldb_dn *nc_dn,
 179                                  struct ldb_dn *source_dsa_dn,
 180                                  enum drsuapi_DsExtendedOperation extended_op,
 181                                  uint64_t fsmo_info,
 182                                  uint64_t min_usn,
 183                                  dreplsrv_extended_callback_t callback,
 184                                  void *callback_data)
 185 {
 186         WERROR werr;
 187         struct extended_op_data *data;
 188
 189         data = talloc(service, struct extended_op_data);
 190         W_ERROR_HAVE_NO_MEMORY(data);
 191
 192         werr = drepl_create_extended_source_dsa(service, data, nc_dn, source_dsa_dn, min_usn, &data->sdsa);
 193         W_ERROR_NOT_OK_RETURN(werr);
 194
 195         data->callback = callback;
 196         data->callback_data = callback_data;
 197
 198         werr = dreplsrv_schedule_partition_pull_source(service, data->sdsa,
 199                                                        0, extended_op, fsmo_info,
 200                                                        extended_op_callback, data);
 201         if (!W_ERROR_IS_OK(werr)) {
 202                 talloc_free(data);
 203         }
 204
 205         dreplsrv_run_pending_ops(service);
 206
 207         return werr;
 208 }