1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
|
/*
Unix SMB/CIFS mplementation.
The module that handles the Schema FSMO Role Owner
checkings, it also loads the dsdb_schema.
Copyright (C) Stefan Metzmacher <metze@samba.org> 2007
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 "lib/ldb/include/ldb.h"
#include "lib/ldb/include/ldb_errors.h"
#include "lib/ldb/include/ldb_private.h"
#include "dsdb/samdb/samdb.h"
#include "librpc/gen_ndr/ndr_misc.h"
#include "librpc/gen_ndr/ndr_drsuapi.h"
#include "librpc/gen_ndr/ndr_drsblobs.h"
#include "lib/util/dlinklist.h"
#include "param/param.h"
static int schema_fsmo_init(struct ldb_module *module)
{
TALLOC_CTX *mem_ctx;
struct ldb_dn *schema_dn;
struct dsdb_schema *schema;
struct ldb_result *schema_res;
struct ldb_result *a_res;
struct ldb_result *c_res;
char *error_string = NULL;
int ret;
static const char *schema_attrs[] = {
"prefixMap",
"schemaInfo",
"fSMORoleOwner",
NULL
};
if (dsdb_get_schema(module->ldb)) {
return ldb_next_init(module);
}
schema_dn = samdb_schema_dn(module->ldb);
if (!schema_dn) {
ldb_reset_err_string(module->ldb);
ldb_debug(module->ldb, LDB_DEBUG_WARNING,
"schema_fsmo_init: no schema dn present: (skip schema loading)\n");
return ldb_next_init(module);
}
mem_ctx = talloc_new(module);
if (!mem_ctx) {
ldb_oom(module->ldb);
return LDB_ERR_OPERATIONS_ERROR;
}
/*
* setup the prefix mappings and schema info
*/
ret = ldb_search(module->ldb, schema_dn,
LDB_SCOPE_BASE,
NULL, schema_attrs,
&schema_res);
if (ret == LDB_ERR_NO_SUCH_OBJECT) {
ldb_reset_err_string(module->ldb);
ldb_debug(module->ldb, LDB_DEBUG_WARNING,
"schema_fsmo_init: no schema head present: (skip schema loading)\n");
talloc_free(mem_ctx);
return ldb_next_init(module);
} else if (ret != LDB_SUCCESS) {
ldb_asprintf_errstring(module->ldb,
"schema_fsmo_init: failed to search the schema head: %s",
ldb_errstring(module->ldb));
talloc_free(mem_ctx);
return ret;
}
talloc_steal(mem_ctx, schema_res);
if (schema_res->count == 0) {
ldb_debug(module->ldb, LDB_DEBUG_WARNING,
"schema_fsmo_init: no schema head present: (skip schema loading)\n");
talloc_free(mem_ctx);
return ldb_next_init(module);
} else if (schema_res->count > 1) {
ldb_debug_set(module->ldb, LDB_DEBUG_FATAL,
"schema_fsmo_init: [%u] schema heads found on a base search",
schema_res->count);
talloc_free(mem_ctx);
return LDB_ERR_CONSTRAINT_VIOLATION;
}
/*
* load the attribute definitions
*/
ret = ldb_search(module->ldb, schema_dn,
LDB_SCOPE_ONELEVEL,
"(objectClass=attributeSchema)", NULL,
&a_res);
if (ret != LDB_SUCCESS) {
ldb_asprintf_errstring(module->ldb,
"schema_fsmo_init: failed to search attributeSchema objects: %s",
ldb_errstring(module->ldb));
talloc_free(mem_ctx);
return ret;
}
talloc_steal(mem_ctx, a_res);
/*
* load the objectClass definitions
*/
ret = ldb_search(module->ldb, schema_dn,
LDB_SCOPE_ONELEVEL,
"(objectClass=classSchema)", NULL,
&c_res);
if (ret != LDB_SUCCESS) {
ldb_asprintf_errstring(module->ldb,
"schema_fsmo_init: failed to search classSchema objects: %s",
ldb_errstring(module->ldb));
talloc_free(mem_ctx);
return ret;
}
talloc_steal(mem_ctx, c_res);
ret = dsdb_schema_from_ldb_results(mem_ctx, module->ldb,
lp_iconv_convenience(ldb_get_opaque(module->ldb, "loadparm")),
schema_res, a_res, c_res, &schema, &error_string);
if (ret != LDB_SUCCESS) {
ldb_asprintf_errstring(module->ldb,
"schema_fsmo_init: dsdb_schema load failed: %s",
error_string);
talloc_free(mem_ctx);
return ret;
}
/* dsdb_set_schema() steal schema into the ldb_context */
ret = dsdb_set_schema(module->ldb, schema);
if (ret != LDB_SUCCESS) {
ldb_debug_set(module->ldb, LDB_DEBUG_FATAL,
"schema_fsmo_init: dsdb_set_schema() failed: %d:%s",
ret, ldb_strerror(ret));
talloc_free(mem_ctx);
return ret;
}
talloc_free(mem_ctx);
return ldb_next_init(module);
}
static int schema_fsmo_add(struct ldb_module *module, struct ldb_request *req)
{
struct dsdb_schema *schema;
const char *attributeID = NULL;
const char *governsID = NULL;
const char *oid_attr = NULL;
const char *oid = NULL;
uint32_t id32;
WERROR status;
schema = dsdb_get_schema(module->ldb);
if (!schema) {
return ldb_next_request(module, req);
}
if (!schema->fsmo.we_are_master) {
ldb_debug_set(module->ldb, LDB_DEBUG_ERROR,
"schema_fsmo_add: we are not master: reject request\n");
return LDB_ERR_UNWILLING_TO_PERFORM;
}
attributeID = samdb_result_string(req->op.add.message, "attributeID", NULL);
governsID = samdb_result_string(req->op.add.message, "governsID", NULL);
if (attributeID) {
oid_attr = "attributeID";
oid = attributeID;
} else if (governsID) {
oid_attr = "governsID";
oid = governsID;
}
if (!oid) {
return ldb_next_request(module, req);
}
status = dsdb_map_oid2int(schema, oid, &id32);
if (W_ERROR_IS_OK(status)) {
return ldb_next_request(module, req);
} else if (!W_ERROR_EQUAL(WERR_DS_NO_MSDS_INTID, status)) {
ldb_debug_set(module->ldb, LDB_DEBUG_ERROR,
"schema_fsmo_add: failed to map %s[%s]: %s\n",
oid_attr, oid, win_errstr(status));
return LDB_ERR_UNWILLING_TO_PERFORM;
}
status = dsdb_create_prefix_mapping(module->ldb, schema, oid);
if (!W_ERROR_IS_OK(status)) {
ldb_debug_set(module->ldb, LDB_DEBUG_ERROR,
"schema_fsmo_add: failed to create prefix mapping for %s[%s]: %s\n",
oid_attr, oid, win_errstr(status));
return LDB_ERR_UNWILLING_TO_PERFORM;
}
return ldb_next_request(module, req);
}
_PUBLIC_ const struct ldb_module_ops ldb_schema_fsmo_module_ops = {
.name = "schema_fsmo",
.init_context = schema_fsmo_init,
.add = schema_fsmo_add
};
|
