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/*
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;
char *error_string = NULL;
int ret;
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;
}
ret = dsdb_schema_from_schema_dn(mem_ctx, module->ldb,
lp_iconv_convenience(ldb_get_opaque(module->ldb, "loadparm")),
schema_dn, &schema, &error_string);
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);
}
if (ret != LDB_SUCCESS) {
ldb_asprintf_errstring(module->ldb,
"schema_fsmo_init: dsdb_schema load failed: %s",
error_string);
talloc_free(mem_ctx);
}
/* 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);
}
static int schema_fsmo_extended(struct ldb_module *module, struct ldb_request *req)
{
struct ldb_dn *schema_dn;
struct dsdb_schema *schema;
char *error_string = NULL;
int ret;
TALLOC_CTX *mem_ctx;
if (strcmp(req->op.extended.oid, DSDB_EXTENDED_SCHEMA_UPDATE_NOW_OID) != 0) {
return ldb_next_request(module, req);
}
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_extended: no schema dn present: (skip schema loading)\n");
return ldb_next_request(module, req);
}
mem_ctx = talloc_new(module);
if (!mem_ctx) {
ldb_oom(module->ldb);
return LDB_ERR_OPERATIONS_ERROR;
}
ret = dsdb_schema_from_schema_dn(mem_ctx, module->ldb,
lp_iconv_convenience(ldb_get_opaque(module->ldb, "loadparm")),
schema_dn, &schema, &error_string);
if (ret == LDB_ERR_NO_SUCH_OBJECT) {
ldb_reset_err_string(module->ldb);
ldb_debug(module->ldb, LDB_DEBUG_WARNING,
"schema_fsmo_extended: no schema head present: (skip schema loading)\n");
talloc_free(mem_ctx);
return ldb_next_request(module, req);
}
if (ret != LDB_SUCCESS) {
ldb_asprintf_errstring(module->ldb,
"schema_fsmo_extended: dsdb_schema load failed: %s",
error_string);
talloc_free(mem_ctx);
return ldb_next_request(module, req);
}
/* Replace the old schema*/
ret = dsdb_set_schema(module->ldb, schema);
if (ret != LDB_SUCCESS) {
ldb_debug_set(module->ldb, LDB_DEBUG_FATAL,
"schema_fsmo_extended: dsdb_set_schema() failed: %d:%s",
ret, ldb_strerror(ret));
talloc_free(mem_ctx);
return ret;
}
talloc_free(mem_ctx);
return LDB_SUCCESS;
}
_PUBLIC_ const struct ldb_module_ops ldb_schema_fsmo_module_ops = {
.name = "schema_fsmo",
.init_context = schema_fsmo_init,
.add = schema_fsmo_add,
.extended = schema_fsmo_extended
};
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