source4/dsdb/repl/drepl_service.c

   1 /*
   2    Unix SMB/CIFS mplementation.
   3    DSDB replication service
   4
   5    Copyright (C) Stefan Metzmacher 2007
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19
  20 */
  21
  22 #include "includes.h"
  23 #include "dsdb/samdb/samdb.h"
  24 #include "auth/auth.h"
  25 #include "smbd/service.h"
  26 #include "lib/events/events.h"
  27 #include "lib/messaging/irpc.h"
  28 #include "dsdb/repl/drepl_service.h"
  29 #include "lib/ldb/include/ldb_errors.h"
  30 #include "../lib/util/dlinklist.h"
  31 #include "librpc/gen_ndr/ndr_misc.h"
  32 #include "librpc/gen_ndr/ndr_drsuapi.h"
  33 #include "librpc/gen_ndr/ndr_drsblobs.h"
  34 #include "librpc/gen_ndr/ndr_irpc.h"
  35 #include "param/param.h"
  36
  37 static WERROR dreplsrv_init_creds(struct dreplsrv_service *service)
  38 {
  39         service->system_session_info = system_session(service->task->lp_ctx);
  40         if (service->system_session_info == NULL) {
  41                 return WERR_NOMEM;
  42         }
  43
  44         return WERR_OK;
  45 }
  46
  47 static WERROR dreplsrv_connect_samdb(struct dreplsrv_service *service, struct loadparm_context *lp_ctx)
  48 {
  49         const struct GUID *ntds_guid;
  50         struct drsuapi_DsBindInfo28 *bind_info28;
  51
  52         service->samdb = samdb_connect(service, service->task->event_ctx, lp_ctx, service->system_session_info);
  53         if (!service->samdb) {
  54                 return WERR_DS_UNAVAILABLE;
  55         }
  56
  57         ntds_guid = samdb_ntds_objectGUID(service->samdb);
  58         if (!ntds_guid) {
  59                 return WERR_DS_UNAVAILABLE;
  60         }
  61
  62         service->ntds_guid = *ntds_guid;
  63
  64         bind_info28                             = &service->bind_info28;
  65         bind_info28->supported_extensions       |= DRSUAPI_SUPPORTED_EXTENSION_BASE;
  66         bind_info28->supported_extensions       |= DRSUAPI_SUPPORTED_EXTENSION_ASYNC_REPLICATION;
  67         bind_info28->supported_extensions       |= DRSUAPI_SUPPORTED_EXTENSION_REMOVEAPI;
  68         bind_info28->supported_extensions       |= DRSUAPI_SUPPORTED_EXTENSION_MOVEREQ_V2;
  69         bind_info28->supported_extensions       |= DRSUAPI_SUPPORTED_EXTENSION_GETCHG_COMPRESS;
  70         bind_info28->supported_extensions       |= DRSUAPI_SUPPORTED_EXTENSION_DCINFO_V1;
  71         bind_info28->supported_extensions       |= DRSUAPI_SUPPORTED_EXTENSION_RESTORE_USN_OPTIMIZATION;
  72         bind_info28->supported_extensions       |= DRSUAPI_SUPPORTED_EXTENSION_KCC_EXECUTE;
  73         bind_info28->supported_extensions       |= DRSUAPI_SUPPORTED_EXTENSION_ADDENTRY_V2;
  74         bind_info28->supported_extensions       |= DRSUAPI_SUPPORTED_EXTENSION_LINKED_VALUE_REPLICATION;
  75         bind_info28->supported_extensions       |= DRSUAPI_SUPPORTED_EXTENSION_DCINFO_V2;
  76         bind_info28->supported_extensions       |= DRSUAPI_SUPPORTED_EXTENSION_INSTANCE_TYPE_NOT_REQ_ON_MOD;
  77         bind_info28->supported_extensions       |= DRSUAPI_SUPPORTED_EXTENSION_CRYPTO_BIND;
  78         bind_info28->supported_extensions       |= DRSUAPI_SUPPORTED_EXTENSION_GET_REPL_INFO;
  79         bind_info28->supported_extensions       |= DRSUAPI_SUPPORTED_EXTENSION_STRONG_ENCRYPTION;
  80         bind_info28->supported_extensions       |= DRSUAPI_SUPPORTED_EXTENSION_DCINFO_V01;
  81         bind_info28->supported_extensions       |= DRSUAPI_SUPPORTED_EXTENSION_TRANSITIVE_MEMBERSHIP;
  82         bind_info28->supported_extensions       |= DRSUAPI_SUPPORTED_EXTENSION_ADD_SID_HISTORY;
  83         bind_info28->supported_extensions       |= DRSUAPI_SUPPORTED_EXTENSION_POST_BETA3;
  84         bind_info28->supported_extensions       |= DRSUAPI_SUPPORTED_EXTENSION_GETCHGREQ_V5;
  85         bind_info28->supported_extensions       |= DRSUAPI_SUPPORTED_EXTENSION_GET_MEMBERSHIPS2;
  86         bind_info28->supported_extensions       |= DRSUAPI_SUPPORTED_EXTENSION_GETCHGREQ_V6;
  87         bind_info28->supported_extensions       |= DRSUAPI_SUPPORTED_EXTENSION_NONDOMAIN_NCS;
  88         bind_info28->supported_extensions       |= DRSUAPI_SUPPORTED_EXTENSION_GETCHGREQ_V8;
  89         bind_info28->supported_extensions       |= DRSUAPI_SUPPORTED_EXTENSION_GETCHGREPLY_V5;
  90         bind_info28->supported_extensions       |= DRSUAPI_SUPPORTED_EXTENSION_GETCHGREPLY_V6;
  91         bind_info28->supported_extensions       |= DRSUAPI_SUPPORTED_EXTENSION_ADDENTRYREPLY_V3;
  92         bind_info28->supported_extensions       |= DRSUAPI_SUPPORTED_EXTENSION_GETCHGREPLY_V7;
  93         bind_info28->supported_extensions       |= DRSUAPI_SUPPORTED_EXTENSION_VERIFY_OBJECT;
  94 #if 0 /* we don't support XPRESS compression yet */
  95         bind_info28->supported_extensions       |= DRSUAPI_SUPPORTED_EXTENSION_XPRESS_COMPRESS;
  96 #endif
  97         /* TODO: fill in site_guid */
  98         bind_info28->site_guid                  = GUID_zero();
  99         /* TODO: find out how this is really triggered! */
 100         bind_info28->pid                        = 0;
 101         bind_info28->repl_epoch                 = 0;
 102
 103         return WERR_OK;
 104 }
 105
 106
 107 /*
 108   DsReplicaSync messages from the DRSUAPI server are forwarded here
 109  */
 110 static NTSTATUS drepl_replica_sync(struct irpc_message *msg,
 111                                    struct drsuapi_DsReplicaSync *r)
 112 {
 113         WERROR werr;
 114         struct dreplsrv_partition *p;
 115         struct dreplsrv_partition_source_dsa *dsa;
 116         struct drsuapi_DsReplicaSyncRequest1 *req1;
 117         struct drsuapi_DsReplicaObjectIdentifier *nc;
 118         struct dreplsrv_service *service = talloc_get_type(msg->private_data,
 119                                                            struct dreplsrv_service);
 120
 121 #define REPLICA_SYNC_FAIL(_werr) do {r->out.result = _werr; goto done;} while(0)
 122
 123         if (r->in.level != 1) {
 124                 DEBUG(0,("%s: Level %d is not supported yet.\n",
 125                          __FUNCTION__, r->in.level));
 126                 REPLICA_SYNC_FAIL(WERR_DS_DRA_INVALID_PARAMETER);
 127         }
 128
 129         req1 = &r->in.req->req1;
 130         nc   = req1->naming_context;
 131
 132         /* Check input parameters */
 133         if (!nc) {
 134                 REPLICA_SYNC_FAIL(WERR_DS_DRA_INVALID_PARAMETER);
 135         }
 136
 137         /* Find Naming context to be synchronized */
 138         werr = dreplsrv_partition_find_for_nc(service,
 139                                               &nc->guid, &nc->sid, nc->dn,
 140                                               &p);
 141         if (!W_ERROR_IS_OK(werr)) {
 142                 DEBUG(0,("%s: failed to find NC for (%s, %s) - %s\n",
 143                          __FUNCTION__,
 144                          GUID_string(msg, &nc->guid),
 145                          nc->dn,
 146                          win_errstr(werr)));
 147                 REPLICA_SYNC_FAIL(werr);
 148         }
 149
 150         /* collect source DSAs to sync with */
 151         if (req1->options & DRSUAPI_DRS_SYNC_ALL) {
 152                 for (dsa = p->sources; dsa; dsa = dsa->next) {
 153                         /* schedule replication item */
 154                         werr = dreplsrv_schedule_partition_pull_source(service, dsa,
 155                                                                        DRSUAPI_EXOP_NONE, 0,
 156                                                                        NULL, NULL);
 157                         if (!W_ERROR_IS_OK(werr)) {
 158                                 DEBUG(0,("%s: failed setup of sync of partition (%s, %s, %s) - %s\n",
 159                                          __FUNCTION__,
 160                                          GUID_string(msg, &nc->guid),
 161                                          nc->dn,
 162                                          dsa->repsFrom1->other_info->dns_name,
 163                                          win_errstr(werr)));
 164                                 REPLICA_SYNC_FAIL(werr);
 165                         }
 166                         /* log we've scheduled replication item */
 167                         DEBUG(3,("%s: forcing sync of partition (%s, %s, %s)\n",
 168                                  __FUNCTION__,
 169                                  GUID_string(msg, &nc->guid),
 170                                  nc->dn,
 171                                  dsa->repsFrom1->other_info->dns_name));
 172                 }
 173         } else {
 174                 if (req1->options & DRSUAPI_DRS_SYNC_BYNAME) {
 175                         /* client should pass at least valid string */
 176                         if (!req1->source_dsa_dns) {
 177                                 REPLICA_SYNC_FAIL(WERR_DS_DRA_INVALID_PARAMETER);
 178                         }
 179
 180                         werr = dreplsrv_partition_source_dsa_by_dns(p,
 181                                                                     req1->source_dsa_dns,
 182                                                                     &dsa);
 183                 } else {
 184                         /* client should pass at least some GUID */
 185                         if (GUID_all_zero(&req1->source_dsa_guid)) {
 186                                 REPLICA_SYNC_FAIL(WERR_DS_DRA_INVALID_PARAMETER);
 187                         }
 188
 189                         werr = dreplsrv_partition_source_dsa_by_guid(p,
 190                                                                      &req1->source_dsa_guid,
 191                                                                      &dsa);
 192                 }
 193                 if (!W_ERROR_IS_OK(werr)) {
 194                         DEBUG(0,("%s: Failed to locate source DSA %s for NC %s.\n",
 195                                  __FUNCTION__,
 196                                  (req1->options & DRSUAPI_DRS_SYNC_BYNAME)
 197                                          ? req1->source_dsa_dns
 198                                          : GUID_string(r, &req1->source_dsa_guid),
 199                                  nc->dn));
 200                         REPLICA_SYNC_FAIL(WERR_DS_DRA_NO_REPLICA);
 201                 }
 202
 203                 /* schedule replication item */
 204                 werr = dreplsrv_schedule_partition_pull_source(service, dsa,
 205                                                                DRSUAPI_EXOP_NONE, 0,
 206                                                                NULL, NULL);
 207                 if (!W_ERROR_IS_OK(werr)) {
 208                         DEBUG(0,("%s: failed setup of sync of partition (%s, %s, %s) - %s\n",
 209                                  __FUNCTION__,
 210                                  GUID_string(msg, &nc->guid),
 211                                  nc->dn,
 212                                  dsa->repsFrom1->other_info->dns_name,
 213                                  win_errstr(werr)));
 214                         REPLICA_SYNC_FAIL(werr);
 215                 }
 216                 /* log we've scheduled replication item */
 217                 DEBUG(3,("%s: forcing sync of partition (%s, %s, %s)\n",
 218                          __FUNCTION__,
 219                          GUID_string(msg, &nc->guid),
 220                          nc->dn,
 221                          dsa->repsFrom1->other_info->dns_name));
 222         }
 223
 224         /* if we got here, everything is OK */
 225         r->out.result = WERR_OK;
 226
 227         /* force execution of scheduled replications */
 228         dreplsrv_run_pending_ops(service);
 229
 230 done:
 231         return NT_STATUS_OK;
 232 }
 233
 234 /**
 235  * Called when drplsrv should refresh its state.
 236  * For example, when KCC change topology, dreplsrv
 237  * should update its cache
 238  *
 239  * @param partition_dn If not empty/NULL, partition to update
 240  */
 241 static NTSTATUS dreplsrv_refresh(struct irpc_message *msg,
 242                                  struct dreplsrv_refresh *r)
 243 {
 244         struct dreplsrv_service *s = talloc_get_type(msg->private_data,
 245                                                      struct dreplsrv_service);
 246
 247         r->out.result = dreplsrv_refresh_partitions(s);
 248
 249         return NT_STATUS_OK;
 250 }
 251
 252 /*
 253   startup the dsdb replicator service task
 254 */
 255 static void dreplsrv_task_init(struct task_server *task)
 256 {
 257         WERROR status;
 258         struct dreplsrv_service *service;
 259         uint32_t periodic_startup_interval;
 260         bool am_rodc;
 261         int ret;
 262
 263         switch (lpcfg_server_role(task->lp_ctx)) {
 264         case ROLE_STANDALONE:
 265                 task_server_terminate(task, "dreplsrv: no DSDB replication required in standalone configuration",
 266                                       false);
 267                 return;
 268         case ROLE_DOMAIN_MEMBER:
 269                 task_server_terminate(task, "dreplsrv: no DSDB replication required in domain member configuration",
 270                                       false);
 271                 return;
 272         case ROLE_DOMAIN_CONTROLLER:
 273                 /* Yes, we want DSDB replication */
 274                 break;
 275         }
 276
 277         task_server_set_title(task, "task[dreplsrv]");
 278
 279         service = talloc_zero(task, struct dreplsrv_service);
 280         if (!service) {
 281                 task_server_terminate(task, "dreplsrv_task_init: out of memory", true);
 282                 return;
 283         }
 284         service->task           = task;
 285         service->startup_time   = timeval_current();
 286         task->private_data      = service;
 287
 288         status = dreplsrv_init_creds(service);
 289         if (!W_ERROR_IS_OK(status)) {
 290                 task_server_terminate(task, talloc_asprintf(task,
 291                                       "dreplsrv: Failed to obtain server credentials: %s\n",
 292                                                             win_errstr(status)), true);
 293                 return;
 294         }
 295
 296         status = dreplsrv_connect_samdb(service, task->lp_ctx);
 297         if (!W_ERROR_IS_OK(status)) {
 298                 task_server_terminate(task, talloc_asprintf(task,
 299                                       "dreplsrv: Failed to connect to local samdb: %s\n",
 300                                                             win_errstr(status)), true);
 301                 return;
 302         }
 303
 304         status = dreplsrv_load_partitions(service);
 305         if (!W_ERROR_IS_OK(status)) {
 306                 task_server_terminate(task, talloc_asprintf(task,
 307                                       "dreplsrv: Failed to load partitions: %s\n",
 308                                                             win_errstr(status)), true);
 309                 return;
 310         }
 311
 312         periodic_startup_interval       = lpcfg_parm_int(task->lp_ctx, NULL, "dreplsrv", "periodic_startup_interval", 15); /* in seconds */
 313         service->periodic.interval      = lpcfg_parm_int(task->lp_ctx, NULL, "dreplsrv", "periodic_interval", 300); /* in seconds */
 314
 315         status = dreplsrv_periodic_schedule(service, periodic_startup_interval);
 316         if (!W_ERROR_IS_OK(status)) {
 317                 task_server_terminate(task, talloc_asprintf(task,
 318                                       "dreplsrv: Failed to periodic schedule: %s\n",
 319                                                             win_errstr(status)), true);
 320                 return;
 321         }
 322
 323         /* if we are a RODC then we do not send DSReplicaSync*/
 324         ret = samdb_rodc(service->samdb, &am_rodc);
 325         if (ret == LDB_SUCCESS && !am_rodc) {
 326                 service->notify.interval = lpcfg_parm_int(task->lp_ctx, NULL, "dreplsrv",
 327                                                            "notify_interval", 5); /* in seconds */
 328                 status = dreplsrv_notify_schedule(service, service->notify.interval);
 329                 if (!W_ERROR_IS_OK(status)) {
 330                         task_server_terminate(task, talloc_asprintf(task,
 331                                                   "dreplsrv: Failed to setup notify schedule: %s\n",
 332                                                                         win_errstr(status)), true);
 333                         return;
 334                 }
 335         }
 336
 337         irpc_add_name(task->msg_ctx, "dreplsrv");
 338
 339         IRPC_REGISTER(task->msg_ctx, irpc, DREPLSRV_REFRESH, dreplsrv_refresh, service);
 340         IRPC_REGISTER(task->msg_ctx, drsuapi, DRSUAPI_DSREPLICASYNC, drepl_replica_sync, service);
 341         messaging_register(task->msg_ctx, service, MSG_DREPL_ALLOCATE_RID, dreplsrv_allocate_rid);
 342 }
 343
 344 /*
 345   register ourselves as a available server
 346 */
 347 NTSTATUS server_service_drepl_init(void)
 348 {
 349         return register_server_service("drepl", dreplsrv_task_init);
 350 }