source4/dsdb/repl/drepl_extended.c

   1 /*
   2    Unix SMB/CIFS Implementation.
   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 "samba/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
  38 /*
  39   create the role owner source dsa structure
  40
  41   nc_dn: the DN of the subtree being replicated
  42   source_dsa_dn: the DN of the server that we are replicating from
  43  */
  44 static WERROR drepl_create_extended_source_dsa(struct dreplsrv_service *service,
  45                                                TALLOC_CTX *mem_ctx,
  46                                                struct ldb_dn *nc_dn,
  47                                                struct ldb_dn *source_dsa_dn,
  48                                                uint64_t min_usn,
  49                                                struct dreplsrv_partition_source_dsa **_sdsa)
  50 {
  51         struct dreplsrv_partition_source_dsa *sdsa;
  52         struct ldb_context *ldb = service->samdb;
  53         int ret;
  54         WERROR werr;
  55         struct ldb_dn *nc_root;
  56         struct dreplsrv_partition *p;
  57
  58         sdsa = talloc_zero(service, struct dreplsrv_partition_source_dsa);
  59         W_ERROR_HAVE_NO_MEMORY(sdsa);
  60
  61         sdsa->partition = talloc_zero(sdsa, struct dreplsrv_partition);
  62         if (!sdsa->partition) {
  63                 talloc_free(sdsa);
  64                 return WERR_NOT_ENOUGH_MEMORY;
  65         }
  66
  67         sdsa->partition->dn = ldb_dn_copy(sdsa->partition, nc_dn);
  68         if (!sdsa->partition->dn) {
  69                 talloc_free(sdsa);
  70                 return WERR_NOT_ENOUGH_MEMORY;
  71         }
  72         sdsa->partition->nc.dn = ldb_dn_alloc_linearized(sdsa->partition, nc_dn);
  73         if (!sdsa->partition->nc.dn) {
  74                 talloc_free(sdsa);
  75                 return WERR_NOT_ENOUGH_MEMORY;
  76         }
  77         ret = dsdb_find_guid_by_dn(ldb, nc_dn, &sdsa->partition->nc.guid);
  78         if (ret != LDB_SUCCESS) {
  79                 DEBUG(0,(__location__ ": Failed to find GUID for %s\n",
  80                          ldb_dn_get_linearized(nc_dn)));
  81                 talloc_free(sdsa);
  82                 return WERR_DS_DRA_INTERNAL_ERROR;
  83         }
  84
  85         sdsa->repsFrom1 = &sdsa->_repsFromBlob.ctr.ctr1;
  86         ret = dsdb_find_guid_by_dn(ldb, source_dsa_dn, &sdsa->repsFrom1->source_dsa_obj_guid);
  87         if (ret != LDB_SUCCESS) {
  88                 DEBUG(0,(__location__ ": Failed to find objectGUID for %s\n",
  89                          ldb_dn_get_linearized(source_dsa_dn)));
  90                 talloc_free(sdsa);
  91                 return WERR_DS_DRA_INTERNAL_ERROR;
  92         }
  93
  94         sdsa->repsFrom1->other_info = talloc_zero(sdsa, struct repsFromTo1OtherInfo);
  95         if (!sdsa->repsFrom1->other_info) {
  96                 talloc_free(sdsa);
  97                 return WERR_NOT_ENOUGH_MEMORY;
  98         }
  99
 100         sdsa->repsFrom1->other_info->dns_name = samdb_ntds_msdcs_dns_name(ldb,
 101                                                                           sdsa->repsFrom1->other_info,
 102                                                                           &sdsa->repsFrom1->source_dsa_obj_guid);
 103         if (!sdsa->repsFrom1->other_info->dns_name) {
 104                 talloc_free(sdsa);
 105                 return WERR_NOT_ENOUGH_MEMORY;
 106         }
 107
 108         werr = dreplsrv_out_connection_attach(service, sdsa->repsFrom1, &sdsa->conn);
 109         if (!W_ERROR_IS_OK(werr)) {
 110                 DEBUG(0,(__location__ ": Failed to attach connection to %s\n",
 111                          ldb_dn_get_linearized(nc_dn)));
 112                 talloc_free(sdsa);
 113                 return werr;
 114         }
 115
 116         ret = dsdb_find_nc_root(service->samdb, sdsa, nc_dn, &nc_root);
 117         if (ret != LDB_SUCCESS) {
 118                 DEBUG(0,(__location__ ": Failed to find nc_root for %s\n",
 119                          ldb_dn_get_linearized(nc_dn)));
 120                 talloc_free(sdsa);
 121                 return WERR_DS_DRA_INTERNAL_ERROR;
 122         }
 123
 124         /* use the partition uptodateness vector */
 125         ret = dsdb_load_udv_v2(service->samdb, nc_root, sdsa->partition,
 126                                &sdsa->partition->uptodatevector.cursors,
 127                                &sdsa->partition->uptodatevector.count);
 128         if (ret != LDB_SUCCESS) {
 129                 DEBUG(0,(__location__ ": Failed to load UDV for %s\n",
 130                          ldb_dn_get_linearized(nc_root)));
 131                 talloc_free(sdsa);
 132                 return WERR_DS_DRA_INTERNAL_ERROR;
 133         }
 134
 135         /* find the highwatermark from the partitions list */
 136         for (p=service->partitions; p; p=p->next) {
 137                 if (ldb_dn_compare(p->dn, nc_root) == 0) {
 138                         struct dreplsrv_partition_source_dsa *s;
 139                         werr = dreplsrv_partition_source_dsa_by_guid(p,
 140                                                                      &sdsa->repsFrom1->source_dsa_obj_guid,
 141                                                                      &s);
 142                         if (W_ERROR_IS_OK(werr)) {
 143                                 sdsa->repsFrom1->highwatermark = s->repsFrom1->highwatermark;
 144                                 sdsa->repsFrom1->replica_flags = s->repsFrom1->replica_flags;
 145                         }
 146                 }
 147         }
 148
 149         if (!service->am_rodc) {
 150                 sdsa->repsFrom1->replica_flags |= DRSUAPI_DRS_WRIT_REP;
 151         }
 152
 153         *_sdsa = sdsa;
 154         return WERR_OK;
 155 }
 156
 157 struct extended_op_data {
 158         dreplsrv_extended_callback_t callback;
 159         void *callback_data;
 160         struct dreplsrv_partition_source_dsa *sdsa;
 161 };
 162
 163 /*
 164   called when an extended op finishes
 165  */
 166 static void extended_op_callback(struct dreplsrv_service *service,
 167                                  WERROR err,
 168                                  enum drsuapi_DsExtendedError exop_error,
 169                                  void *cb_data)
 170 {
 171         struct extended_op_data *data = talloc_get_type_abort(cb_data, struct extended_op_data);
 172         talloc_unlink(data, data->sdsa);
 173         data->callback(service, err, exop_error, data->callback_data);
 174         talloc_free(data);
 175 }
 176
 177 /*
 178   schedule a getncchanges request to the role owner for an extended operation
 179  */
 180 WERROR drepl_request_extended_op(struct dreplsrv_service *service,
 181                                  struct ldb_dn *nc_dn,
 182                                  struct ldb_dn *source_dsa_dn,
 183                                  enum drsuapi_DsExtendedOperation extended_op,
 184                                  uint64_t fsmo_info,
 185                                  uint64_t min_usn,
 186                                  dreplsrv_extended_callback_t callback,
 187                                  void *callback_data)
 188 {
 189         WERROR werr;
 190         struct extended_op_data *data;
 191
 192         data = talloc(service, struct extended_op_data);
 193         W_ERROR_HAVE_NO_MEMORY(data);
 194
 195         werr = drepl_create_extended_source_dsa(service, data, nc_dn, source_dsa_dn, min_usn, &data->sdsa);
 196         W_ERROR_NOT_OK_RETURN(werr);
 197
 198         data->callback = callback;
 199         data->callback_data = callback_data;
 200
 201         werr = dreplsrv_schedule_partition_pull_source(service, data->sdsa,
 202                                                        0, extended_op, fsmo_info,
 203                                                        extended_op_callback, data);
 204         if (!W_ERROR_IS_OK(werr)) {
 205                 talloc_free(data);
 206         }
 207
 208         dreplsrv_run_pending_ops(service);
 209
 210         return werr;
 211 }