1/* 2 Unix SMB/CIFS mplementation. 3 4 The module that handles the Domain Naming FSMO Role Owner 5 checkings 6 7 Copyright (C) Stefan Metzmacher 2007 8 9 This program is free software; you can redistribute it and/or modify 10 it under the terms of the GNU General Public License as published by 11 the Free Software Foundation; either version 3 of the License, or 12 (at your option) any later version. 13 14 This program is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 GNU General Public License for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with this program. If not, see <http://www.gnu.org/licenses/>. 21 22*/ 23 24#include "includes.h" 25#include "ldb_module.h" 26#include "dsdb/samdb/samdb.h" 27#include "librpc/gen_ndr/ndr_misc.h" 28#include "librpc/gen_ndr/ndr_drsuapi.h" 29#include "librpc/gen_ndr/ndr_drsblobs.h" 30#include "../lib/util/dlinklist.h" 31 32static int naming_fsmo_init(struct ldb_module *module) 33{ 34 struct ldb_context *ldb; 35 TALLOC_CTX *mem_ctx; 36 struct ldb_dn *naming_dn; 37 struct dsdb_naming_fsmo *naming_fsmo; 38 struct ldb_result *naming_res; 39 int ret; 40 static const char *naming_attrs[] = { 41 "fSMORoleOwner", 42 NULL 43 }; 44 45 ldb = ldb_module_get_ctx(module); 46 47 mem_ctx = talloc_new(module); 48 if (!mem_ctx) { 49 ldb_oom(ldb); 50 return LDB_ERR_OPERATIONS_ERROR; 51 } 52 53 naming_dn = samdb_partitions_dn(ldb, mem_ctx); 54 if (!naming_dn) { 55 ldb_debug(ldb, LDB_DEBUG_WARNING, 56 "naming_fsmo_init: no partitions dn present: (skip loading of naming contexts details)\n"); 57 talloc_free(mem_ctx); 58 return ldb_next_init(module); 59 } 60 61 naming_fsmo = talloc_zero(mem_ctx, struct dsdb_naming_fsmo); 62 if (!naming_fsmo) { 63 ldb_oom(ldb); 64 return LDB_ERR_OPERATIONS_ERROR; 65 } 66 ldb_module_set_private(module, naming_fsmo); 67 68 ret = ldb_search(ldb, mem_ctx, &naming_res, 69 naming_dn, LDB_SCOPE_BASE, 70 naming_attrs, NULL); 71 if (ret == LDB_ERR_NO_SUCH_OBJECT) { 72 ldb_debug(ldb, LDB_DEBUG_WARNING, 73 "naming_fsmo_init: no partitions dn present: (skip loading of naming contexts details)\n"); 74 talloc_free(mem_ctx); 75 return ldb_next_init(module); 76 } 77 if (ret != LDB_SUCCESS) { 78 ldb_debug_set(ldb, LDB_DEBUG_FATAL, 79 "naming_fsmo_init: failed to search the cross-ref container: %s: %s", 80 ldb_strerror(ret), ldb_errstring(ldb)); 81 talloc_free(mem_ctx); 82 return ret; 83 } 84 if (naming_res->count == 0) { 85 ldb_debug(ldb, LDB_DEBUG_WARNING, 86 "naming_fsmo_init: no cross-ref container present: (skip loading of naming contexts details)\n"); 87 talloc_free(mem_ctx); 88 return ldb_next_init(module); 89 } else if (naming_res->count > 1) { 90 ldb_debug_set(ldb, LDB_DEBUG_FATAL, 91 "naming_fsmo_init: [%u] cross-ref containers found on a base search", 92 naming_res->count); 93 talloc_free(mem_ctx); 94 return LDB_ERR_CONSTRAINT_VIOLATION; 95 } 96 97 naming_fsmo->master_dn = ldb_msg_find_attr_as_dn(ldb, naming_fsmo, naming_res->msgs[0], "fSMORoleOwner"); 98 if (ldb_dn_compare(samdb_ntds_settings_dn(ldb), naming_fsmo->master_dn) == 0) { 99 naming_fsmo->we_are_master = true; 100 } else { 101 naming_fsmo->we_are_master = false; 102 } 103 104 if (ldb_set_opaque(ldb, "dsdb_naming_fsmo", naming_fsmo) != LDB_SUCCESS) { 105 ldb_oom(ldb); 106 return LDB_ERR_OPERATIONS_ERROR; 107 } 108 109 talloc_steal(module, naming_fsmo); 110 111 ldb_debug(ldb, LDB_DEBUG_TRACE, 112 "naming_fsmo_init: we are master: %s\n", 113 (naming_fsmo->we_are_master?"yes":"no")); 114 115 talloc_free(mem_ctx); 116 return ldb_next_init(module); 117} 118 119_PUBLIC_ const struct ldb_module_ops ldb_naming_fsmo_module_ops = { 120 .name = "naming_fsmo", 121 .init_context = naming_fsmo_init 122}; 123