2 Unix SMB/CIFS mplementation.
4 DSDB replication service - RID allocation code
6 Copyright (C) Andrew Tridgell 2010
7 Copyright (C) Andrew Bartlett 2010
9 based on drepl_notify.c
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program. If not, see <http://www.gnu.org/licenses/>.
27 #include "ldb_module.h"
28 #include "dsdb/samdb/samdb.h"
29 #include "smbd/service.h"
30 #include "dsdb/repl/drepl_service.h"
31 #include "param/param.h"
35 create the RID manager source dsa structure
37 static WERROR drepl_create_rid_manager_source_dsa(struct dreplsrv_service *service,
38 struct ldb_dn *rid_manager_dn, struct ldb_dn *fsmo_role_dn)
40 struct dreplsrv_partition_source_dsa *sdsa;
41 struct ldb_context *ldb = service->samdb;
45 sdsa = talloc_zero(service, struct dreplsrv_partition_source_dsa);
46 W_ERROR_HAVE_NO_MEMORY(sdsa);
48 sdsa->partition = talloc_zero(sdsa, struct dreplsrv_partition);
49 if (!sdsa->partition) {
54 sdsa->partition->dn = ldb_get_default_basedn(ldb);
55 sdsa->partition->nc.dn = ldb_dn_alloc_linearized(sdsa->partition, rid_manager_dn);
56 ret = dsdb_find_guid_by_dn(ldb, rid_manager_dn, &sdsa->partition->nc.guid);
57 if (ret != LDB_SUCCESS) {
58 DEBUG(0,(__location__ ": Failed to find GUID for %s\n",
59 ldb_dn_get_linearized(rid_manager_dn)));
61 return WERR_DS_DRA_INTERNAL_ERROR;
64 sdsa->repsFrom1 = &sdsa->_repsFromBlob.ctr.ctr1;
65 ret = dsdb_find_guid_attr_by_dn(ldb, fsmo_role_dn, "objectGUID", &sdsa->repsFrom1->source_dsa_obj_guid);
66 if (ret != LDB_SUCCESS) {
67 DEBUG(0,(__location__ ": Failed to find objectGUID for %s\n",
68 ldb_dn_get_linearized(fsmo_role_dn)));
70 return WERR_DS_DRA_INTERNAL_ERROR;
73 sdsa->repsFrom1->other_info = talloc_zero(sdsa, struct repsFromTo1OtherInfo);
74 if (!sdsa->repsFrom1->other_info) {
79 sdsa->repsFrom1->other_info->dns_name =
80 talloc_asprintf(sdsa->repsFrom1->other_info, "%s._msdcs.%s",
81 GUID_string(sdsa->repsFrom1->other_info, &sdsa->repsFrom1->source_dsa_obj_guid),
82 lpcfg_dnsdomain(service->task->lp_ctx));
83 if (!sdsa->repsFrom1->other_info->dns_name) {
89 werr = dreplsrv_out_connection_attach(service, sdsa->repsFrom1, &sdsa->conn);
90 if (!W_ERROR_IS_OK(werr)) {
91 DEBUG(0,(__location__ ": Failed to attach to RID manager connection\n"));
96 service->ridalloc.rid_manager_source_dsa = sdsa;
101 called when a rid allocation request has completed
103 static void drepl_new_rid_pool_callback(struct dreplsrv_service *service,
105 enum drsuapi_DsExtendedError ext_err)
107 if (!W_ERROR_IS_OK(werr)) {
108 DEBUG(0,(__location__ ": RID Manager failed RID allocation - %s - extended_ret[0x%X]\n",
109 win_errstr(werr), ext_err));
111 DEBUG(3,(__location__ ": RID Manager completed RID allocation OK\n"));
114 /* don't keep the connection open to the RID Manager */
115 talloc_free(service->ridalloc.rid_manager_source_dsa);
116 service->ridalloc.rid_manager_source_dsa = NULL;
118 service->ridalloc.in_progress = false;
122 schedule a getncchanges request to the RID Manager to ask for a new
123 set of RIDs using DRSUAPI_EXOP_FSMO_RID_ALLOC
125 static WERROR drepl_request_new_rid_pool(struct dreplsrv_service *service,
126 struct ldb_dn *rid_manager_dn, struct ldb_dn *fsmo_role_dn,
131 if (service->ridalloc.rid_manager_source_dsa == NULL) {
132 /* we need to establish a connection to the RID
134 werr = drepl_create_rid_manager_source_dsa(service, rid_manager_dn, fsmo_role_dn);
135 W_ERROR_NOT_OK_RETURN(werr);
138 service->ridalloc.in_progress = true;
140 werr = dreplsrv_schedule_partition_pull_source(service, service->ridalloc.rid_manager_source_dsa,
141 DRSUAPI_EXOP_FSMO_RID_ALLOC, alloc_pool,
142 drepl_new_rid_pool_callback);
148 see if we are on the last pool we have
150 static int drepl_ridalloc_pool_exhausted(struct ldb_context *ldb,
152 uint64_t *_alloc_pool)
154 struct ldb_dn *server_dn, *machine_dn, *rid_set_dn;
155 TALLOC_CTX *tmp_ctx = talloc_new(ldb);
158 uint32_t prev_pool_lo, prev_pool_hi;
160 static const char * const attrs[] = {
162 "rIDPreviousAllocationPool",
167 struct ldb_result *res;
170 *_alloc_pool = UINT64_MAX;
172 server_dn = ldb_dn_get_parent(tmp_ctx, samdb_ntds_settings_dn(ldb));
174 talloc_free(tmp_ctx);
175 return ldb_operr(ldb);
178 ret = samdb_reference_dn(ldb, tmp_ctx, server_dn, "serverReference", &machine_dn);
179 if (ret != LDB_SUCCESS) {
180 DEBUG(0,(__location__ ": Failed to find serverReference in %s - %s",
181 ldb_dn_get_linearized(server_dn), ldb_errstring(ldb)));
182 talloc_free(tmp_ctx);
186 ret = samdb_reference_dn(ldb, tmp_ctx, machine_dn, "rIDSetReferences", &rid_set_dn);
187 if (ret == LDB_ERR_NO_SUCH_ATTRIBUTE) {
190 talloc_free(tmp_ctx);
193 if (ret != LDB_SUCCESS) {
194 DEBUG(0,(__location__ ": Failed to find rIDSetReferences in %s - %s",
195 ldb_dn_get_linearized(machine_dn), ldb_errstring(ldb)));
196 talloc_free(tmp_ctx);
200 ret = ldb_search(ldb, tmp_ctx, &res, rid_set_dn, LDB_SCOPE_BASE, attrs, NULL);
201 if (ret != LDB_SUCCESS) {
202 DEBUG(0,(__location__ ": Failed to load RID Set attrs from %s - %s",
203 ldb_dn_get_linearized(rid_set_dn), ldb_errstring(ldb)));
204 talloc_free(tmp_ctx);
208 alloc_pool = ldb_msg_find_attr_as_uint64(res->msgs[0], "rIDAllocationPool", 0);
209 prev_pool = ldb_msg_find_attr_as_uint64(res->msgs[0], "rIDPreviousAllocationPool", 0);
210 prev_pool_lo = prev_pool & 0xFFFFFFFF;
211 prev_pool_hi = prev_pool >> 32;
212 next_rid = ldb_msg_find_attr_as_uint(res->msgs[0], "rIDNextRid", 0);
214 if (alloc_pool != prev_pool) {
215 talloc_free(tmp_ctx);
219 if (next_rid < (prev_pool_hi + prev_pool_lo)/2) {
220 talloc_free(tmp_ctx);
225 *_alloc_pool = alloc_pool;
226 talloc_free(tmp_ctx);
232 see if we are low on RIDs in the RID Set rIDAllocationPool. If we
233 are, then schedule a replication call with DRSUAPI_EXOP_FSMO_RID_ALLOC
236 WERROR dreplsrv_ridalloc_check_rid_pool(struct dreplsrv_service *service)
238 struct ldb_dn *rid_manager_dn, *fsmo_role_dn;
239 TALLOC_CTX *tmp_ctx = talloc_new(service);
240 struct ldb_context *ldb = service->samdb;
246 if (service->ridalloc.in_progress) {
247 talloc_free(tmp_ctx);
253 - find who the RID Manager is
254 - if we are the RID Manager then nothing to do
255 - find our RID Set object
256 - load rIDAllocationPool and rIDPreviousAllocationPool
257 - if rIDAllocationPool != rIDPreviousAllocationPool then
259 - schedule a getncchanges with DRSUAPI_EXOP_FSMO_RID_ALLOC
263 /* work out who is the RID Manager */
264 ret = samdb_rid_manager_dn(ldb, tmp_ctx, &rid_manager_dn);
265 if (ret != LDB_SUCCESS) {
266 DEBUG(0, (__location__ ": Failed to find RID Manager object - %s", ldb_errstring(ldb)));
267 talloc_free(tmp_ctx);
268 return WERR_DS_DRA_INTERNAL_ERROR;
271 /* find the DN of the RID Manager */
272 ret = samdb_reference_dn(ldb, tmp_ctx, rid_manager_dn, "fSMORoleOwner", &fsmo_role_dn);
273 if (ret != LDB_SUCCESS) {
274 DEBUG(0,(__location__ ": Failed to find fSMORoleOwner in RID Manager object - %s",
275 ldb_errstring(ldb)));
276 talloc_free(tmp_ctx);
277 return WERR_DS_DRA_INTERNAL_ERROR;
280 if (ldb_dn_compare(samdb_ntds_settings_dn(ldb), fsmo_role_dn) == 0) {
281 /* we are the RID Manager - no need to do a
282 DRSUAPI_EXOP_FSMO_RID_ALLOC */
283 talloc_free(tmp_ctx);
287 ret = drepl_ridalloc_pool_exhausted(ldb, &exhausted, &alloc_pool);
288 if (ret != LDB_SUCCESS) {
289 talloc_free(tmp_ctx);
290 return WERR_DS_DRA_INTERNAL_ERROR;
294 /* don't need a new pool */
295 talloc_free(tmp_ctx);
299 DEBUG(2,(__location__ ": Requesting more RIDs from RID Manager\n"));
301 werr = drepl_request_new_rid_pool(service, rid_manager_dn, fsmo_role_dn, alloc_pool);
302 talloc_free(tmp_ctx);
306 /* called by the samldb ldb module to tell us to ask for a new RID
308 void dreplsrv_allocate_rid(struct messaging_context *msg, void *private_data,
310 struct server_id server_id, DATA_BLOB *data)
312 struct dreplsrv_service *service = talloc_get_type(private_data, struct dreplsrv_service);
313 dreplsrv_ridalloc_check_rid_pool(service);