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/*
Unix SMB/CIFS mplementation.
DSDB replication service - FSMO role change
Copyright (C) Nadezhda Ivanova 2010
Copyright (C) Andrew Tridgell 2010
Copyright (C) Andrew Bartlett 2010
based on drepl_ridalloc.c
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 <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "dsdb/samdb/samdb.h"
#include "smbd/service.h"
#include "dsdb/repl/drepl_service.h"
#include "param/param.h"
#include "lib/messaging/irpc.h"
#include "librpc/gen_ndr/ndr_irpc.h"
static void drepl_role_callback(struct dreplsrv_service *service,
WERROR werr,
enum drsuapi_DsExtendedError ext_err,
void *cb_data)
{
if (!W_ERROR_IS_OK(werr)) {
DEBUG(0,(__location__ ": Failed role transfer - %s - extended_ret[0x%X]\n",
win_errstr(werr), ext_err));
} else {
DEBUG(0,(__location__ ": Successful role transfer\n"));
}
service->role_transfer_in_progress = false;
}
static bool fsmo_master_cmp(struct ldb_dn *ntds_dn, struct ldb_dn *role_owner_dn)
{
if (ldb_dn_compare(ntds_dn, role_owner_dn) == 0) {
DEBUG(0,("\nWe are the FSMO master.\n"));
return true;
}
return false;
}
/*
see which role is we are asked to assume, initialize data and send request
*/
WERROR dreplsrv_fsmo_role_check(struct dreplsrv_service *service,
uint32_t role)
{
struct ldb_dn *role_owner_dn, *fsmo_role_dn, *ntds_dn;
TALLOC_CTX *tmp_ctx = talloc_new(service);
struct ldb_context *ldb = service->samdb;
int ret;
uint64_t fsmo_info = 0;
enum drsuapi_DsExtendedOperation extended_op = DRSUAPI_EXOP_NONE;
WERROR werr;
if (service->role_transfer_in_progress) {
talloc_free(tmp_ctx);
/* should we allow these in parallel? */
return WERR_DS_DRA_REPL_PENDING;
}
ntds_dn = samdb_ntds_settings_dn(ldb);
if (!ntds_dn) {
return WERR_DS_DRA_INTERNAL_ERROR;
}
switch (role) {
case DREPL_NAMING_MASTER:
fsmo_role_dn = samdb_partitions_dn(ldb, tmp_ctx),
ret = samdb_reference_dn(ldb, tmp_ctx, fsmo_role_dn, "fSMORoleOwner", &role_owner_dn);
if (ret != LDB_SUCCESS) {
DEBUG(0,(__location__ ": Failed to find fSMORoleOwner in Naming Master object - %s",
ldb_errstring(ldb)));
talloc_free(tmp_ctx);
return WERR_DS_DRA_INTERNAL_ERROR;
}
break;
case DREPL_INFRASTRUCTURE_MASTER:
fsmo_role_dn = samdb_infrastructure_dn(ldb, tmp_ctx);
ret = samdb_reference_dn(ldb, tmp_ctx, fsmo_role_dn, "fSMORoleOwner", &role_owner_dn);
if (ret != LDB_SUCCESS) {
DEBUG(0,(__location__ ": Failed to find fSMORoleOwner in Schema Master object - %s",
ldb_errstring(ldb)));
talloc_free(tmp_ctx);
return WERR_DS_DRA_INTERNAL_ERROR;
}
extended_op = DRSUAPI_EXOP_FSMO_REQ_ROLE;
break;
case DREPL_RID_MASTER:
ret = samdb_rid_manager_dn(ldb, tmp_ctx, &fsmo_role_dn);
if (ret != LDB_SUCCESS) {
DEBUG(0, (__location__ ": Failed to find RID Manager object - %s", ldb_errstring(ldb)));
talloc_free(tmp_ctx);
return WERR_DS_DRA_INTERNAL_ERROR;
}
ret = samdb_reference_dn(ldb, tmp_ctx, fsmo_role_dn, "fSMORoleOwner", &role_owner_dn);
if (ret != LDB_SUCCESS) {
DEBUG(0,(__location__ ": Failed to find fSMORoleOwner in RID Manager object - %s",
ldb_errstring(ldb)));
talloc_free(tmp_ctx);
return WERR_DS_DRA_INTERNAL_ERROR;
}
extended_op = DRSUAPI_EXOP_FSMO_RID_REQ_ROLE;
break;
case DREPL_SCHEMA_MASTER:
fsmo_role_dn = ldb_get_schema_basedn(ldb);
ret = samdb_reference_dn(ldb, tmp_ctx, fsmo_role_dn, "fSMORoleOwner", &role_owner_dn);
if (ret != LDB_SUCCESS) {
DEBUG(0,(__location__ ": Failed to find fSMORoleOwner in Schema Master object - %s",
ldb_errstring(ldb)));
talloc_free(tmp_ctx);
return WERR_DS_DRA_INTERNAL_ERROR;
}
extended_op = DRSUAPI_EXOP_FSMO_REQ_ROLE;
break;
case DREPL_PDC_MASTER:
fsmo_role_dn = ldb_get_default_basedn(ldb);
ret = samdb_reference_dn(ldb, tmp_ctx, fsmo_role_dn, "fSMORoleOwner", &role_owner_dn);
if (ret != LDB_SUCCESS) {
DEBUG(0,(__location__ ": Failed to find fSMORoleOwner in Pd Master object - %s",
ldb_errstring(ldb)));
talloc_free(tmp_ctx);
return WERR_DS_DRA_INTERNAL_ERROR;
}
extended_op = DRSUAPI_EXOP_FSMO_REQ_PDC;
break;
default:
return WERR_DS_DRA_INTERNAL_ERROR;
}
if (fsmo_master_cmp(ntds_dn, role_owner_dn) ||
(extended_op == DRSUAPI_EXOP_NONE)) {
DEBUG(0,("FSMO role check failed for DN %s and owner %s ",
ldb_dn_get_linearized(fsmo_role_dn),
ldb_dn_get_linearized(role_owner_dn)));
return WERR_OK;
}
werr = drepl_request_extended_op(service,
fsmo_role_dn,
role_owner_dn,
extended_op,
fsmo_info,
drepl_role_callback);
if (W_ERROR_IS_OK(werr)) {
dreplsrv_run_pending_ops(service);
} else {
DEBUG(0,("%s: drepl_request_extended_op() failed with %s",
__FUNCTION__, win_errstr(werr)));
}
return werr;
}
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