source: trunk/server/source4/dsdb/repl/drepl_service.c

Last change on this file was 745, checked in by Silvan Scherrer, 13 years ago

Samba Server: updated trunk to 3.6.0
File size: 17.2 KB
Line 
1/*
2 Unix SMB/CIFS mplementation.
3 DSDB replication service
4
5 Copyright (C) Stefan Metzmacher 2007
6 Copyright (C) Kamen Mazdrashki <kamenim@samba.org> 2010
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
20
21*/
22
23#include "includes.h"
24#include "dsdb/samdb/samdb.h"
25#include "auth/auth.h"
26#include "smbd/service.h"
27#include "lib/events/events.h"
28#include "dsdb/repl/drepl_service.h"
29#include <ldb_errors.h>
30#include "../lib/util/dlinklist.h"
31#include "librpc/gen_ndr/ndr_misc.h"
32#include "librpc/gen_ndr/ndr_drsuapi.h"
33#include "librpc/gen_ndr/ndr_drsblobs.h"
34#include "librpc/gen_ndr/ndr_irpc.h"
35#include "param/param.h"
36
37/**
38 * Call-back data for _drepl_replica_sync_done_cb()
39 */
40struct drepl_replica_sync_cb_data {
41 struct irpc_message *msg;
42 struct drsuapi_DsReplicaSync *r;
43
44 /* number of ops left to be completed */
45 int ops_count;
46
47 /* last failure error code */
48 WERROR werr_last_failure;
49};
50
51
52static WERROR dreplsrv_init_creds(struct dreplsrv_service *service)
53{
54 service->system_session_info = system_session(service->task->lp_ctx);
55 if (service->system_session_info == NULL) {
56 return WERR_NOMEM;
57 }
58
59 return WERR_OK;
60}
61
62static WERROR dreplsrv_connect_samdb(struct dreplsrv_service *service, struct loadparm_context *lp_ctx)
63{
64 const struct GUID *ntds_guid;
65 struct drsuapi_DsBindInfo28 *bind_info28;
66
67 service->samdb = samdb_connect(service, service->task->event_ctx, lp_ctx, service->system_session_info, 0);
68 if (!service->samdb) {
69 return WERR_DS_UNAVAILABLE;
70 }
71
72 ntds_guid = samdb_ntds_objectGUID(service->samdb);
73 if (!ntds_guid) {
74 return WERR_DS_UNAVAILABLE;
75 }
76 service->ntds_guid = *ntds_guid;
77
78 if (samdb_rodc(service->samdb, &service->am_rodc) != LDB_SUCCESS) {
79 DEBUG(0,(__location__ ": Failed to determine RODC status\n"));
80 return WERR_DS_UNAVAILABLE;
81 }
82
83 bind_info28 = &service->bind_info28;
84 bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_BASE;
85 bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_ASYNC_REPLICATION;
86 bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_REMOVEAPI;
87 bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_MOVEREQ_V2;
88 bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_GETCHG_COMPRESS;
89 bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_DCINFO_V1;
90 bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_RESTORE_USN_OPTIMIZATION;
91 bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_KCC_EXECUTE;
92 bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_ADDENTRY_V2;
93 bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_LINKED_VALUE_REPLICATION;
94 bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_DCINFO_V2;
95 bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_INSTANCE_TYPE_NOT_REQ_ON_MOD;
96 bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_CRYPTO_BIND;
97 bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_GET_REPL_INFO;
98 bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_STRONG_ENCRYPTION;
99 bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_DCINFO_V01;
100 bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_TRANSITIVE_MEMBERSHIP;
101 bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_ADD_SID_HISTORY;
102 bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_POST_BETA3;
103 bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_GETCHGREQ_V5;
104 bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_GET_MEMBERSHIPS2;
105 bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_GETCHGREQ_V6;
106 bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_NONDOMAIN_NCS;
107 bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_GETCHGREQ_V8;
108 bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_GETCHGREPLY_V5;
109 bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_GETCHGREPLY_V6;
110 bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_ADDENTRYREPLY_V3;
111 bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_GETCHGREPLY_V7;
112 bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_VERIFY_OBJECT;
113#if 0 /* we don't support XPRESS compression yet */
114 bind_info28->supported_extensions |= DRSUAPI_SUPPORTED_EXTENSION_XPRESS_COMPRESS;
115#endif
116 /* TODO: fill in site_guid */
117 bind_info28->site_guid = GUID_zero();
118 /* TODO: find out how this is really triggered! */
119 bind_info28->pid = 0;
120 bind_info28->repl_epoch = 0;
121
122 return WERR_OK;
123}
124
125
126/**
127 * Callback for dreplsrv_out_operation operation completion.
128 *
129 * We just need to complete a waiting IRPC message here.
130 * In case pull operation has failed,
131 * caller of this callback will dump
132 * failure information.
133 *
134 * NOTE: cb_data is allocated in IRPC msg's context
135 * and will be freed during irpc_send_reply() call.
136 */
137static void _drepl_replica_sync_done_cb(struct dreplsrv_service *service,
138 WERROR werr,
139 enum drsuapi_DsExtendedError ext_err,
140 void *cb_data)
141{
142 struct drepl_replica_sync_cb_data *data = talloc_get_type(cb_data,
143 struct drepl_replica_sync_cb_data);
144 struct irpc_message *msg = data->msg;
145 struct drsuapi_DsReplicaSync *r = data->r;
146
147 /* store last bad result */
148 if (!W_ERROR_IS_OK(werr)) {
149 data->werr_last_failure = werr;
150 }
151
152 /* decrement pending ops count */
153 data->ops_count--;
154
155 if (data->ops_count == 0) {
156 /* Return result to client */
157 r->out.result = data->werr_last_failure;
158
159 /* complete IRPC message */
160 irpc_send_reply(msg, NT_STATUS_OK);
161 }
162}
163
164/**
165 * Helper to schedule a replication operation with a source DSA.
166 * If 'data' is valid pointer, then a callback
167 * for the operation is passed and 'data->msg' is
168 * marked as 'deferred' - defer_reply = true
169 */
170static WERROR _drepl_schedule_replication(struct dreplsrv_service *service,
171 struct dreplsrv_partition_source_dsa *dsa,
172 struct drsuapi_DsReplicaObjectIdentifier *nc,
173 uint32_t rep_options,
174 struct drepl_replica_sync_cb_data *data,
175 TALLOC_CTX *mem_ctx)
176{
177 WERROR werr;
178 dreplsrv_extended_callback_t fn_callback = NULL;
179
180 if (data) {
181 fn_callback = _drepl_replica_sync_done_cb;
182 }
183
184 /* schedule replication item */
185 werr = dreplsrv_schedule_partition_pull_source(service, dsa, rep_options,
186 DRSUAPI_EXOP_NONE, 0,
187 fn_callback, data);
188 if (!W_ERROR_IS_OK(werr)) {
189 DEBUG(0,("%s: failed setup of sync of partition (%s, %s, %s) - %s\n",
190 __FUNCTION__,
191 GUID_string(mem_ctx, &nc->guid),
192 nc->dn,
193 dsa->repsFrom1->other_info->dns_name,
194 win_errstr(werr)));
195 return werr;
196 }
197 /* log we've scheduled a replication item */
198 DEBUG(3,("%s: forcing sync of partition (%s, %s, %s)\n",
199 __FUNCTION__,
200 GUID_string(mem_ctx, &nc->guid),
201 nc->dn,
202 dsa->repsFrom1->other_info->dns_name));
203
204 /* mark IRPC message as deferred if necessary */
205 if (data) {
206 data->ops_count++;
207 data->msg->defer_reply = true;
208 }
209
210 return WERR_OK;
211}
212
213/*
214 DsReplicaSync messages from the DRSUAPI server are forwarded here
215 */
216static NTSTATUS drepl_replica_sync(struct irpc_message *msg,
217 struct drsuapi_DsReplicaSync *r)
218{
219 WERROR werr;
220 struct dreplsrv_partition *p;
221 struct drepl_replica_sync_cb_data *cb_data;
222 struct dreplsrv_partition_source_dsa *dsa;
223 struct drsuapi_DsReplicaSyncRequest1 *req1;
224 struct drsuapi_DsReplicaObjectIdentifier *nc;
225 struct dreplsrv_service *service = talloc_get_type(msg->private_data,
226 struct dreplsrv_service);
227
228#define REPLICA_SYNC_FAIL(_msg, _werr) do {\
229 if (!W_ERROR_IS_OK(_werr)) { \
230 DEBUG(0,(__location__ ": Failure - %s. werr = %s\n", \
231 _msg, win_errstr(_werr))); \
232 NDR_PRINT_IN_DEBUG(drsuapi_DsReplicaSync, r); \
233 } \
234 r->out.result = _werr; \
235 goto done;\
236 } while(0)
237
238
239 if (r->in.level != 1) {
240 REPLICA_SYNC_FAIL("Unsupported level",
241 WERR_DS_DRA_INVALID_PARAMETER);
242 }
243
244 req1 = &r->in.req->req1;
245 nc = req1->naming_context;
246
247 /* Check input parameters */
248 if (!nc) {
249 REPLICA_SYNC_FAIL("Invalid Naming Context",
250 WERR_DS_DRA_INVALID_PARAMETER);
251 }
252
253 /* Find Naming context to be synchronized */
254 werr = dreplsrv_partition_find_for_nc(service,
255 &nc->guid, &nc->sid, nc->dn,
256 &p);
257 if (!W_ERROR_IS_OK(werr)) {
258 REPLICA_SYNC_FAIL("Failed to find requested Naming Context",
259 werr);
260 }
261
262 /* should we process it asynchronously? */
263 if (req1->options & DRSUAPI_DRS_ASYNC_OP) {
264 cb_data = NULL;
265 } else {
266 cb_data = talloc_zero(msg, struct drepl_replica_sync_cb_data);
267 if (!cb_data) {
268 REPLICA_SYNC_FAIL("Not enought memory",
269 WERR_DS_DRA_INTERNAL_ERROR);
270 }
271
272 cb_data->msg = msg;
273 cb_data->r = r;
274 cb_data->werr_last_failure = WERR_OK;
275 }
276
277 /* collect source DSAs to sync with */
278 if (req1->options & DRSUAPI_DRS_SYNC_ALL) {
279 for (dsa = p->sources; dsa; dsa = dsa->next) {
280 /* schedule replication item */
281 werr = _drepl_schedule_replication(service, dsa, nc,
282 req1->options, cb_data, msg);
283 if (!W_ERROR_IS_OK(werr)) {
284 REPLICA_SYNC_FAIL("_drepl_schedule_replication() failed",
285 werr);
286 }
287 }
288 } else {
289 if (req1->options & DRSUAPI_DRS_SYNC_BYNAME) {
290 /* client should pass at least valid string */
291 if (!req1->source_dsa_dns) {
292 REPLICA_SYNC_FAIL("'source_dsa_dns' is not valid",
293 WERR_DS_DRA_INVALID_PARAMETER);
294 }
295
296 werr = dreplsrv_partition_source_dsa_by_dns(p,
297 req1->source_dsa_dns,
298 &dsa);
299 } else {
300 /* client should pass at least some GUID */
301 if (GUID_all_zero(&req1->source_dsa_guid)) {
302 REPLICA_SYNC_FAIL("'source_dsa_guid' is not valid",
303 WERR_DS_DRA_INVALID_PARAMETER);
304 }
305
306 werr = dreplsrv_partition_source_dsa_by_guid(p,
307 &req1->source_dsa_guid,
308 &dsa);
309 }
310 if (!W_ERROR_IS_OK(werr)) {
311 REPLICA_SYNC_FAIL("Failed to locate source DSA for given NC",
312 werr);
313 }
314
315 /* schedule replication item */
316 werr = _drepl_schedule_replication(service, dsa, nc,
317 req1->options, cb_data, msg);
318 if (!W_ERROR_IS_OK(werr)) {
319 REPLICA_SYNC_FAIL("_drepl_schedule_replication() failed",
320 werr);
321 }
322 }
323
324 /* if we got here, everything is OK */
325 r->out.result = WERR_OK;
326
327 /*
328 * schedule replication event to force
329 * replication as soon as possible
330 */
331 dreplsrv_periodic_schedule(service, 0);
332
333done:
334 return NT_STATUS_OK;
335}
336
337/**
338 * Called when drplsrv should refresh its state.
339 * For example, when KCC change topology, dreplsrv
340 * should update its cache
341 *
342 * @param partition_dn If not empty/NULL, partition to update
343 */
344static NTSTATUS dreplsrv_refresh(struct irpc_message *msg,
345 struct dreplsrv_refresh *r)
346{
347 struct dreplsrv_service *s = talloc_get_type(msg->private_data,
348 struct dreplsrv_service);
349
350 r->out.result = dreplsrv_refresh_partitions(s);
351
352 return NT_STATUS_OK;
353}
354
355static NTSTATUS drepl_take_FSMO_role(struct irpc_message *msg,
356 struct drepl_takeFSMORole *r)
357{
358 struct dreplsrv_service *service = talloc_get_type(msg->private_data,
359 struct dreplsrv_service);
360 r->out.result = dreplsrv_fsmo_role_check(service, r->in.role);
361 return NT_STATUS_OK;
362}
363
364/**
365 * Called when the auth code wants us to try and replicate
366 * a users secrets
367 */
368static NTSTATUS drepl_trigger_repl_secret(struct irpc_message *msg,
369 struct drepl_trigger_repl_secret *r)
370{
371 struct dreplsrv_service *service = talloc_get_type(msg->private_data,
372 struct dreplsrv_service);
373
374
375 drepl_repl_secret(service, r->in.user_dn);
376
377 /* we are not going to be sending a reply to this request */
378 msg->no_reply = true;
379
380 return NT_STATUS_OK;
381}
382
383
384/*
385 DsReplicaAdd messages from the DRSUAPI server are forwarded here
386 */
387static NTSTATUS dreplsrv_replica_add(struct irpc_message *msg,
388 struct drsuapi_DsReplicaAdd *r)
389{
390 struct dreplsrv_service *service = talloc_get_type(msg->private_data,
391 struct dreplsrv_service);
392 return drepl_replica_add(service, r);
393}
394
395/*
396 DsReplicaDel messages from the DRSUAPI server are forwarded here
397 */
398static NTSTATUS dreplsrv_replica_del(struct irpc_message *msg,
399 struct drsuapi_DsReplicaDel *r)
400{
401 struct dreplsrv_service *service = talloc_get_type(msg->private_data,
402 struct dreplsrv_service);
403 return drepl_replica_del(service, r);
404}
405
406/*
407 DsReplicaMod messages from the DRSUAPI server are forwarded here
408 */
409static NTSTATUS dreplsrv_replica_mod(struct irpc_message *msg,
410 struct drsuapi_DsReplicaMod *r)
411{
412 struct dreplsrv_service *service = talloc_get_type(msg->private_data,
413 struct dreplsrv_service);
414 return drepl_replica_mod(service, r);
415}
416
417
418/*
419 startup the dsdb replicator service task
420*/
421static void dreplsrv_task_init(struct task_server *task)
422{
423 WERROR status;
424 struct dreplsrv_service *service;
425 uint32_t periodic_startup_interval;
426
427 switch (lpcfg_server_role(task->lp_ctx)) {
428 case ROLE_STANDALONE:
429 task_server_terminate(task, "dreplsrv: no DSDB replication required in standalone configuration",
430 false);
431 return;
432 case ROLE_DOMAIN_MEMBER:
433 task_server_terminate(task, "dreplsrv: no DSDB replication required in domain member configuration",
434 false);
435 return;
436 case ROLE_DOMAIN_CONTROLLER:
437 /* Yes, we want DSDB replication */
438 break;
439 }
440
441 task_server_set_title(task, "task[dreplsrv]");
442
443 service = talloc_zero(task, struct dreplsrv_service);
444 if (!service) {
445 task_server_terminate(task, "dreplsrv_task_init: out of memory", true);
446 return;
447 }
448 service->task = task;
449 service->startup_time = timeval_current();
450 task->private_data = service;
451
452 status = dreplsrv_init_creds(service);
453 if (!W_ERROR_IS_OK(status)) {
454 task_server_terminate(task, talloc_asprintf(task,
455 "dreplsrv: Failed to obtain server credentials: %s\n",
456 win_errstr(status)), true);
457 return;
458 }
459
460 status = dreplsrv_connect_samdb(service, task->lp_ctx);
461 if (!W_ERROR_IS_OK(status)) {
462 task_server_terminate(task, talloc_asprintf(task,
463 "dreplsrv: Failed to connect to local samdb: %s\n",
464 win_errstr(status)), true);
465 return;
466 }
467
468 status = dreplsrv_load_partitions(service);
469 if (!W_ERROR_IS_OK(status)) {
470 task_server_terminate(task, talloc_asprintf(task,
471 "dreplsrv: Failed to load partitions: %s\n",
472 win_errstr(status)), true);
473 return;
474 }
475
476 periodic_startup_interval = lpcfg_parm_int(task->lp_ctx, NULL, "dreplsrv", "periodic_startup_interval", 15); /* in seconds */
477 service->periodic.interval = lpcfg_parm_int(task->lp_ctx, NULL, "dreplsrv", "periodic_interval", 300); /* in seconds */
478
479 status = dreplsrv_periodic_schedule(service, periodic_startup_interval);
480 if (!W_ERROR_IS_OK(status)) {
481 task_server_terminate(task, talloc_asprintf(task,
482 "dreplsrv: Failed to periodic schedule: %s\n",
483 win_errstr(status)), true);
484 return;
485 }
486
487 /* if we are a RODC then we do not send DSReplicaSync*/
488 if (!service->am_rodc) {
489 service->notify.interval = lpcfg_parm_int(task->lp_ctx, NULL, "dreplsrv",
490 "notify_interval", 5); /* in seconds */
491 status = dreplsrv_notify_schedule(service, service->notify.interval);
492 if (!W_ERROR_IS_OK(status)) {
493 task_server_terminate(task, talloc_asprintf(task,
494 "dreplsrv: Failed to setup notify schedule: %s\n",
495 win_errstr(status)), true);
496 return;
497 }
498 }
499
500 irpc_add_name(task->msg_ctx, "dreplsrv");
501
502 IRPC_REGISTER(task->msg_ctx, irpc, DREPLSRV_REFRESH, dreplsrv_refresh, service);
503 IRPC_REGISTER(task->msg_ctx, drsuapi, DRSUAPI_DSREPLICASYNC, drepl_replica_sync, service);
504 IRPC_REGISTER(task->msg_ctx, drsuapi, DRSUAPI_DSREPLICAADD, dreplsrv_replica_add, service);
505 IRPC_REGISTER(task->msg_ctx, drsuapi, DRSUAPI_DSREPLICADEL, dreplsrv_replica_del, service);
506 IRPC_REGISTER(task->msg_ctx, drsuapi, DRSUAPI_DSREPLICAMOD, dreplsrv_replica_mod, service);
507 IRPC_REGISTER(task->msg_ctx, irpc, DREPL_TAKEFSMOROLE, drepl_take_FSMO_role, service);
508 IRPC_REGISTER(task->msg_ctx, irpc, DREPL_TRIGGER_REPL_SECRET, drepl_trigger_repl_secret, service);
509 messaging_register(task->msg_ctx, service, MSG_DREPL_ALLOCATE_RID, dreplsrv_allocate_rid);
510}
511
512/*
513 register ourselves as a available server
514*/
515NTSTATUS server_service_drepl_init(void)
516{
517 return register_server_service("drepl", dreplsrv_task_init);
518}
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