| 1 | /*
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| 2 | Unix SMB/CIFS mplementation.
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| 3 |
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| 4 | DSDB replication service - FSMO role change
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| 5 |
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| 6 | Copyright (C) Nadezhda Ivanova 2010
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| 7 | Copyright (C) Andrew Tridgell 2010
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| 8 | Copyright (C) Andrew Bartlett 2010
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| 9 | Copyright (C) Anatoliy Atanasov 2010
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| 10 |
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| 11 | based on drepl_ridalloc.c
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| 12 |
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| 13 | This program is free software; you can redistribute it and/or modify
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| 14 | it under the terms of the GNU General Public License as published by
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| 15 | the Free Software Foundation; either version 3 of the License, or
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| 16 | (at your option) any later version.
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| 17 |
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| 18 | This program is distributed in the hope that it will be useful,
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| 19 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 20 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 21 | GNU General Public License for more details.
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| 22 |
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| 23 | You should have received a copy of the GNU General Public License
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| 24 | along with this program. If not, see <http://www.gnu.org/licenses/>.
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| 25 |
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| 26 | */
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| 27 |
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| 28 | #include "includes.h"
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| 29 | #include "dsdb/samdb/samdb.h"
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| 30 | #include "smbd/service.h"
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| 31 | #include "dsdb/repl/drepl_service.h"
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| 32 | #include "param/param.h"
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| 33 |
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| 34 | static void drepl_role_callback(struct dreplsrv_service *service,
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| 35 | WERROR werr,
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| 36 | enum drsuapi_DsExtendedError ext_err,
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| 37 | void *cb_data)
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| 38 | {
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| 39 | if (!W_ERROR_IS_OK(werr)) {
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| 40 | DEBUG(0,(__location__ ": Failed role transfer - %s - extended_ret[0x%X]\n",
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| 41 | win_errstr(werr), ext_err));
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| 42 | } else {
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| 43 | DEBUG(0,(__location__ ": Successful role transfer\n"));
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| 44 | }
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| 45 | }
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| 46 |
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| 47 | static bool fsmo_master_cmp(struct ldb_dn *ntds_dn, struct ldb_dn *role_owner_dn)
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| 48 | {
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| 49 | if (ldb_dn_compare(ntds_dn, role_owner_dn) == 0) {
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| 50 | DEBUG(0,("\nWe are the FSMO master.\n"));
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| 51 | return true;
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| 52 | }
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| 53 | return false;
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| 54 | }
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| 55 |
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| 56 | /*
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| 57 | see which role is we are asked to assume, initialize data and send request
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| 58 | */
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| 59 | WERROR dreplsrv_fsmo_role_check(struct dreplsrv_service *service,
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| 60 | enum drepl_role_master role)
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| 61 | {
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| 62 | struct ldb_dn *role_owner_dn, *fsmo_role_dn, *ntds_dn;
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| 63 | TALLOC_CTX *tmp_ctx = talloc_new(service);
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| 64 | uint64_t fsmo_info = 0;
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| 65 | enum drsuapi_DsExtendedOperation extended_op = DRSUAPI_EXOP_NONE;
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| 66 | WERROR werr;
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| 67 |
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| 68 | ntds_dn = samdb_ntds_settings_dn(service->samdb);
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| 69 | if (!ntds_dn) {
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| 70 | return WERR_DS_DRA_INTERNAL_ERROR;
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| 71 | }
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| 72 |
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| 73 | werr = dsdb_get_fsmo_role_info(tmp_ctx, service->samdb, role,
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| 74 | &fsmo_role_dn, &role_owner_dn);
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| 75 | if (!W_ERROR_IS_OK(werr)) {
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| 76 | return werr;
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| 77 | }
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| 78 |
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| 79 | switch (role) {
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| 80 | case DREPL_NAMING_MASTER:
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| 81 | case DREPL_INFRASTRUCTURE_MASTER:
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| 82 | case DREPL_SCHEMA_MASTER:
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| 83 | extended_op = DRSUAPI_EXOP_FSMO_REQ_ROLE;
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| 84 | break;
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| 85 | case DREPL_RID_MASTER:
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| 86 | extended_op = DRSUAPI_EXOP_FSMO_RID_REQ_ROLE;
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| 87 | break;
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| 88 | case DREPL_PDC_MASTER:
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| 89 | extended_op = DRSUAPI_EXOP_FSMO_REQ_PDC;
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| 90 | break;
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| 91 | default:
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| 92 | return WERR_DS_DRA_INTERNAL_ERROR;
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| 93 | }
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| 94 |
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| 95 | if (fsmo_master_cmp(ntds_dn, role_owner_dn) ||
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| 96 | (extended_op == DRSUAPI_EXOP_NONE)) {
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| 97 | DEBUG(0,("FSMO role check failed for DN %s and owner %s ",
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| 98 | ldb_dn_get_linearized(fsmo_role_dn),
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| 99 | ldb_dn_get_linearized(role_owner_dn)));
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| 100 | return WERR_OK;
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| 101 | }
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| 102 |
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| 103 | werr = drepl_request_extended_op(service,
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| 104 | fsmo_role_dn,
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| 105 | role_owner_dn,
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| 106 | extended_op,
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| 107 | fsmo_info,
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| 108 | 0,
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| 109 | drepl_role_callback,
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| 110 | NULL);
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| 111 | if (W_ERROR_IS_OK(werr)) {
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| 112 | dreplsrv_run_pending_ops(service);
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| 113 | } else {
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| 114 | DEBUG(0,("%s: drepl_request_extended_op() failed with %s",
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| 115 | __FUNCTION__, win_errstr(werr)));
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| 116 | }
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| 117 | return werr;
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| 118 | }
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