/* Unix SMB/CIFS mplementation. DSDB replication service Copyright (C) Stefan Metzmacher 2007 Copyright (C) Kamen Mazdrashki 2010 This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . */ #include "includes.h" #include "dsdb/samdb/samdb.h" #include "auth/auth.h" #include "smbd/service.h" #include "lib/events/events.h" #include "dsdb/repl/drepl_service.h" #include #include "../lib/util/dlinklist.h" #include "librpc/gen_ndr/ndr_misc.h" #include "librpc/gen_ndr/ndr_drsuapi.h" #include "librpc/gen_ndr/ndr_drsblobs.h" #include "librpc/gen_ndr/ndr_irpc.h" #include "param/param.h" #include "libds/common/roles.h" #undef DBGC_CLASS #define DBGC_CLASS DBGC_DRS_REPL /** * Call-back data for _drepl_replica_sync_done_cb() */ struct drepl_replica_sync_cb_data { struct irpc_message *msg; struct drsuapi_DsReplicaSync *r; /* number of ops left to be completed */ int ops_count; /* last failure error code */ WERROR werr_last_failure; }; static WERROR dreplsrv_init_creds(struct dreplsrv_service *service) { service->system_session_info = system_session(service->task->lp_ctx); if (service->system_session_info == NULL) { return WERR_NOT_ENOUGH_MEMORY; } return WERR_OK; } static WERROR dreplsrv_connect_samdb(struct dreplsrv_service *service, struct loadparm_context *lp_ctx) { const struct GUID *ntds_guid; struct drsuapi_DsBindInfo28 *bind_info28; service->samdb = samdb_connect(service, service->task->event_ctx, lp_ctx, service->system_session_info, NULL, 0); if (!service->samdb) { return WERR_DS_UNAVAILABLE; } ntds_guid = samdb_ntds_objectGUID(service->samdb); if (!ntds_guid) { return WERR_DS_UNAVAILABLE; } service->ntds_guid = *ntds_guid; if (samdb_rodc(service->samdb, &service->am_rodc) != LDB_SUCCESS) { DEBUG(0,(__location__ ": Failed to determine RODC status\n")); return WERR_DS_UNAVAILABLE; } bind_info28 = &service->bind_info28; bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_BASE; bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_ASYNC_REPLICATION; bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_REMOVEAPI; bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_MOVEREQ_V2; bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_GETCHG_COMPRESS; bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_DCINFO_V1; bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_RESTORE_USN_OPTIMIZATION; bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_KCC_EXECUTE; bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_ADDENTRY_V2; bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_LINKED_VALUE_REPLICATION; bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_DCINFO_V2; bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_INSTANCE_TYPE_NOT_REQ_ON_MOD; bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_CRYPTO_BIND; bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_GET_REPL_INFO; bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_STRONG_ENCRYPTION; bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_DCINFO_V01; bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_TRANSITIVE_MEMBERSHIP; bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_ADD_SID_HISTORY; bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_POST_BETA3; bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_GETCHGREQ_V5; bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_GET_MEMBERSHIPS2; bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_GETCHGREQ_V6; bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_NONDOMAIN_NCS; bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_GETCHGREQ_V8; bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_GETCHGREPLY_V5; bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_GETCHGREPLY_V6; bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_ADDENTRYREPLY_V3; bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_GETCHGREPLY_V7; bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_VERIFY_OBJECT; #if 0 /* we don't support XPRESS compression yet */ bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_XPRESS_COMPRESS; #endif /* TODO: fill in site_guid */ bind_info28->site_guid = GUID_zero(); /* TODO: find out how this is really triggered! */ bind_info28->pid = 0; bind_info28->repl_epoch = 0; return WERR_OK; } /** * Callback for dreplsrv_out_operation operation completion. * * We just need to complete a waiting IRPC message here. * In case pull operation has failed, * caller of this callback will dump * failure information. * * NOTE: cb_data is allocated in IRPC msg's context * and will be freed during irpc_send_reply() call. */ static void _drepl_replica_sync_done_cb(struct dreplsrv_service *service, WERROR werr, enum drsuapi_DsExtendedError ext_err, void *cb_data) { struct drepl_replica_sync_cb_data *data = talloc_get_type(cb_data, struct drepl_replica_sync_cb_data); struct irpc_message *msg = data->msg; struct drsuapi_DsReplicaSync *r = data->r; /* store last bad result */ if (!W_ERROR_IS_OK(werr)) { data->werr_last_failure = werr; } /* decrement pending ops count */ data->ops_count--; if (data->ops_count == 0) { /* Return result to client */ r->out.result = data->werr_last_failure; /* complete IRPC message */ irpc_send_reply(msg, NT_STATUS_OK); } } /** * Helper to schedule a replication operation with a source DSA. * If 'data' is valid pointer, then a callback * for the operation is passed and 'data->msg' is * marked as 'deferred' - defer_reply = true */ static WERROR _drepl_schedule_replication(struct dreplsrv_service *service, struct dreplsrv_partition_source_dsa *dsa, struct drsuapi_DsReplicaObjectIdentifier *nc, uint32_t rep_options, struct drepl_replica_sync_cb_data *data, TALLOC_CTX *mem_ctx) { WERROR werr; dreplsrv_extended_callback_t fn_callback = NULL; if (data) { fn_callback = _drepl_replica_sync_done_cb; } /* schedule replication item */ werr = dreplsrv_schedule_partition_pull_source(service, dsa, rep_options, DRSUAPI_EXOP_NONE, 0, fn_callback, data); if (!W_ERROR_IS_OK(werr)) { DEBUG(0,("%s: failed setup of sync of partition (%s, %s, %s) - %s\n", __FUNCTION__, GUID_string(mem_ctx, &nc->guid), nc->dn, dsa->repsFrom1->other_info->dns_name, win_errstr(werr))); return werr; } /* log we've scheduled a replication item */ DEBUG(3,("%s: forcing sync of partition (%s, %s, %s)\n", __FUNCTION__, GUID_string(mem_ctx, &nc->guid), nc->dn, dsa->repsFrom1->other_info->dns_name)); /* mark IRPC message as deferred if necessary */ if (data) { data->ops_count++; data->msg->defer_reply = true; } return WERR_OK; } /* DsReplicaSync messages from the DRSUAPI server are forwarded here */ static NTSTATUS drepl_replica_sync(struct irpc_message *msg, struct drsuapi_DsReplicaSync *r) { WERROR werr; struct dreplsrv_partition *p; struct drepl_replica_sync_cb_data *cb_data; struct dreplsrv_partition_source_dsa *dsa; struct drsuapi_DsReplicaSyncRequest1 *req1; struct drsuapi_DsReplicaObjectIdentifier *nc; struct dreplsrv_service *service = talloc_get_type(msg->private_data, struct dreplsrv_service); #define REPLICA_SYNC_FAIL(_msg, _werr) do {\ if (!W_ERROR_IS_OK(_werr)) { \ DEBUG(0,(__location__ ": Failure - %s. werr = %s\n", \ _msg, win_errstr(_werr))); \ NDR_PRINT_IN_DEBUG(drsuapi_DsReplicaSync, r); \ } \ r->out.result = _werr; \ goto done;\ } while(0) if (r->in.level != 1) { REPLICA_SYNC_FAIL("Unsupported level", WERR_DS_DRA_INVALID_PARAMETER); } req1 = &r->in.req->req1; nc = req1->naming_context; /* Check input parameters */ if (!nc) { REPLICA_SYNC_FAIL("Invalid Naming Context", WERR_DS_DRA_INVALID_PARAMETER); } /* Find Naming context to be synchronized */ werr = dreplsrv_partition_find_for_nc(service, &nc->guid, &nc->sid, nc->dn, &p); if (!W_ERROR_IS_OK(werr)) { REPLICA_SYNC_FAIL("Failed to find requested Naming Context", werr); } /* should we process it asynchronously? */ if (req1->options & DRSUAPI_DRS_ASYNC_OP) { cb_data = NULL; } else { cb_data = talloc_zero(msg, struct drepl_replica_sync_cb_data); if (!cb_data) { REPLICA_SYNC_FAIL("Not enough memory", WERR_DS_DRA_INTERNAL_ERROR); } cb_data->msg = msg; cb_data->r = r; cb_data->werr_last_failure = WERR_OK; } /* collect source DSAs to sync with */ if (req1->options & DRSUAPI_DRS_SYNC_ALL) { for (dsa = p->sources; dsa; dsa = dsa->next) { /* schedule replication item */ werr = _drepl_schedule_replication(service, dsa, nc, req1->options, cb_data, msg); if (!W_ERROR_IS_OK(werr)) { REPLICA_SYNC_FAIL("_drepl_schedule_replication() failed", werr); } } } else { if (req1->options & DRSUAPI_DRS_SYNC_BYNAME) { /* client should pass at least valid string */ if (!req1->source_dsa_dns) { REPLICA_SYNC_FAIL("'source_dsa_dns' is not valid", WERR_DS_DRA_INVALID_PARAMETER); } werr = dreplsrv_partition_source_dsa_by_dns(p, req1->source_dsa_dns, &dsa); } else { /* client should pass at least some GUID */ if (GUID_all_zero(&req1->source_dsa_guid)) { REPLICA_SYNC_FAIL("'source_dsa_guid' is not valid", WERR_DS_DRA_INVALID_PARAMETER); } werr = dreplsrv_partition_source_dsa_by_guid(p, &req1->source_dsa_guid, &dsa); if (W_ERROR_EQUAL(werr, WERR_DS_DRA_NO_REPLICA)) { /* we don't have this source setup as a replication partner. Create a temporary dsa structure for this replication */ werr = dreplsrv_partition_source_dsa_temporary(p, msg, &req1->source_dsa_guid, &dsa); } } if (!W_ERROR_IS_OK(werr)) { REPLICA_SYNC_FAIL("Failed to locate source DSA for given NC", werr); } /* schedule replication item */ werr = _drepl_schedule_replication(service, dsa, nc, req1->options, cb_data, msg); if (!W_ERROR_IS_OK(werr)) { REPLICA_SYNC_FAIL("_drepl_schedule_replication() failed", werr); } } /* if we got here, everything is OK */ r->out.result = WERR_OK; /* * schedule replication event to force * replication as soon as possible */ dreplsrv_pendingops_schedule_pull_now(service); done: return NT_STATUS_OK; } /** * Called when drplsrv should refresh its state. * For example, when KCC change topology, dreplsrv * should update its cache * * @param partition_dn If not empty/NULL, partition to update */ static NTSTATUS dreplsrv_refresh(struct irpc_message *msg, struct dreplsrv_refresh *r) { struct dreplsrv_service *s = talloc_get_type(msg->private_data, struct dreplsrv_service); r->out.result = dreplsrv_refresh_partitions(s); return NT_STATUS_OK; } /** * Called when the auth code wants us to try and replicate * a users secrets */ static NTSTATUS drepl_trigger_repl_secret(struct irpc_message *msg, struct drepl_trigger_repl_secret *r) { struct dreplsrv_service *service = talloc_get_type(msg->private_data, struct dreplsrv_service); drepl_repl_secret(service, r->in.user_dn); /* we are not going to be sending a reply to this request */ msg->no_reply = true; return NT_STATUS_OK; } /* DsReplicaAdd messages from the DRSUAPI server are forwarded here */ static NTSTATUS dreplsrv_replica_add(struct irpc_message *msg, struct drsuapi_DsReplicaAdd *r) { struct dreplsrv_service *service = talloc_get_type(msg->private_data, struct dreplsrv_service); return drepl_replica_add(service, r); } /* DsReplicaDel messages from the DRSUAPI server are forwarded here */ static NTSTATUS dreplsrv_replica_del(struct irpc_message *msg, struct drsuapi_DsReplicaDel *r) { struct dreplsrv_service *service = talloc_get_type(msg->private_data, struct dreplsrv_service); return drepl_replica_del(service, r); } /* DsReplicaMod messages from the DRSUAPI server are forwarded here */ static NTSTATUS dreplsrv_replica_mod(struct irpc_message *msg, struct drsuapi_DsReplicaMod *r) { struct dreplsrv_service *service = talloc_get_type(msg->private_data, struct dreplsrv_service); return drepl_replica_mod(service, r); } /* startup the dsdb replicator service task */ static NTSTATUS dreplsrv_task_init(struct task_server *task) { WERROR status; struct dreplsrv_service *service; uint32_t periodic_startup_interval; switch (lpcfg_server_role(task->lp_ctx)) { case ROLE_STANDALONE: task_server_terminate(task, "dreplsrv: no DSDB replication required in standalone configuration", false); return NT_STATUS_INVALID_DOMAIN_ROLE; case ROLE_DOMAIN_MEMBER: task_server_terminate(task, "dreplsrv: no DSDB replication required in domain member configuration", false); return NT_STATUS_INVALID_DOMAIN_ROLE; case ROLE_ACTIVE_DIRECTORY_DC: /* Yes, we want DSDB replication */ break; } task_server_set_title(task, "task[dreplsrv]"); service = talloc_zero(task, struct dreplsrv_service); if (!service) { task_server_terminate(task, "dreplsrv_task_init: out of memory", true); return NT_STATUS_NO_MEMORY; } service->task = task; service->startup_time = timeval_current(); task->private_data = service; status = dreplsrv_init_creds(service); if (!W_ERROR_IS_OK(status)) { task_server_terminate(task, talloc_asprintf(task, "dreplsrv: Failed to obtain server credentials: %s\n", win_errstr(status)), true); return werror_to_ntstatus(status); } status = dreplsrv_connect_samdb(service, task->lp_ctx); if (!W_ERROR_IS_OK(status)) { task_server_terminate(task, talloc_asprintf(task, "dreplsrv: Failed to connect to local samdb: %s\n", win_errstr(status)), true); return werror_to_ntstatus(status); } status = dreplsrv_load_partitions(service); if (!W_ERROR_IS_OK(status)) { task_server_terminate(task, talloc_asprintf(task, "dreplsrv: Failed to load partitions: %s\n", win_errstr(status)), true); return werror_to_ntstatus(status); } periodic_startup_interval = lpcfg_parm_int(task->lp_ctx, NULL, "dreplsrv", "periodic_startup_interval", 15); /* in seconds */ service->periodic.interval = lpcfg_parm_int(task->lp_ctx, NULL, "dreplsrv", "periodic_interval", 300); /* in seconds */ status = dreplsrv_periodic_schedule(service, periodic_startup_interval); if (!W_ERROR_IS_OK(status)) { task_server_terminate(task, talloc_asprintf(task, "dreplsrv: Failed to periodic schedule: %s\n", win_errstr(status)), true); return werror_to_ntstatus(status); } service->pending.im = tevent_create_immediate(service); if (service->pending.im == NULL) { task_server_terminate(task, "dreplsrv: Failed to create immediate " "task for future DsReplicaSync\n", true); return NT_STATUS_NO_MEMORY; } /* if we are a RODC then we do not send DSReplicaSync*/ if (!service->am_rodc) { service->notify.interval = lpcfg_parm_int(task->lp_ctx, NULL, "dreplsrv", "notify_interval", 5); /* in seconds */ status = dreplsrv_notify_schedule(service, service->notify.interval); if (!W_ERROR_IS_OK(status)) { task_server_terminate(task, talloc_asprintf(task, "dreplsrv: Failed to setup notify schedule: %s\n", win_errstr(status)), true); return werror_to_ntstatus(status); } } irpc_add_name(task->msg_ctx, "dreplsrv"); IRPC_REGISTER(task->msg_ctx, irpc, DREPLSRV_REFRESH, dreplsrv_refresh, service); IRPC_REGISTER(task->msg_ctx, drsuapi, DRSUAPI_DSREPLICASYNC, drepl_replica_sync, service); IRPC_REGISTER(task->msg_ctx, drsuapi, DRSUAPI_DSREPLICAADD, dreplsrv_replica_add, service); IRPC_REGISTER(task->msg_ctx, drsuapi, DRSUAPI_DSREPLICADEL, dreplsrv_replica_del, service); IRPC_REGISTER(task->msg_ctx, drsuapi, DRSUAPI_DSREPLICAMOD, dreplsrv_replica_mod, service); IRPC_REGISTER(task->msg_ctx, irpc, DREPL_TAKEFSMOROLE, drepl_take_FSMO_role, service); IRPC_REGISTER(task->msg_ctx, irpc, DREPL_TRIGGER_REPL_SECRET, drepl_trigger_repl_secret, service); imessaging_register(task->msg_ctx, service, MSG_DREPL_ALLOCATE_RID, dreplsrv_allocate_rid); return NT_STATUS_OK; } /* register ourselves as a available server */ NTSTATUS server_service_drepl_init(TALLOC_CTX *ctx) { static const struct service_details details = { .inhibit_fork_on_accept = true, .inhibit_pre_fork = true, .task_init = dreplsrv_task_init, .post_fork = NULL, }; return register_server_service(ctx, "drepl", &details); }