1 /*
2 Unix SMB/CIFS mplementation.
3 DSDB replication service periodic handling
4
5 Copyright (C) Stefan Metzmacher 2007
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>.
19
20 */
21
22 #include "includes.h"
23 #include "lib/events/events.h"
24 #include "dsdb/samdb/samdb.h"
25 #include "auth/auth.h"
26 #include "smbd/service.h"
27 #include "dsdb/repl/drepl_service.h"
28 #include <ldb_errors.h>
29 #include "../lib/util/dlinklist.h"
30 #include "librpc/gen_ndr/ndr_misc.h"
31 #include "librpc/gen_ndr/ndr_drsuapi.h"
32 #include "librpc/gen_ndr/ndr_drsblobs.h"
33
34 #undef DBGC_CLASS
35 #define DBGC_CLASS DBGC_DRS_REPL
36
37 static void dreplsrv_periodic_run(struct dreplsrv_service *service);
38
dreplsrv_periodic_handler_te(struct tevent_context * ev,struct tevent_timer * te,struct timeval t,void * ptr)39 static void dreplsrv_periodic_handler_te(struct tevent_context *ev, struct tevent_timer *te,
40 struct timeval t, void *ptr)
41 {
42 struct dreplsrv_service *service = talloc_get_type(ptr, struct dreplsrv_service);
43 WERROR status;
44
45 service->periodic.te = NULL;
46
47 dreplsrv_periodic_run(service);
48
49 status = dreplsrv_periodic_schedule(service, service->periodic.interval);
50 if (!W_ERROR_IS_OK(status)) {
51 task_server_terminate(service->task, win_errstr(status), false);
52 return;
53 }
54 }
55
dreplsrv_periodic_schedule(struct dreplsrv_service * service,uint32_t next_interval)56 WERROR dreplsrv_periodic_schedule(struct dreplsrv_service *service, uint32_t next_interval)
57 {
58 TALLOC_CTX *tmp_mem;
59 struct tevent_timer *new_te;
60 struct timeval next_time;
61
62 /* prevent looping */
63 if (next_interval == 0) next_interval = 1;
64
65 next_time = timeval_current_ofs(next_interval, 50);
66
67 if (service->periodic.te) {
68 /*
69 * if the timestamp of the new event is higher,
70 * as current next we don't need to reschedule
71 */
72 if (timeval_compare(&next_time, &service->periodic.next_event) > 0) {
73 return WERR_OK;
74 }
75 }
76
77 /* reset the next scheduled timestamp */
78 service->periodic.next_event = next_time;
79
80 new_te = tevent_add_timer(service->task->event_ctx, service,
81 service->periodic.next_event,
82 dreplsrv_periodic_handler_te, service);
83 W_ERROR_HAVE_NO_MEMORY(new_te);
84
85 tmp_mem = talloc_new(service);
86 DEBUG(4,("dreplsrv_periodic_schedule(%u) %sscheduled for: %s\n",
87 next_interval,
88 (service->periodic.te?"re":""),
89 nt_time_string(tmp_mem, timeval_to_nttime(&next_time))));
90 talloc_free(tmp_mem);
91
92 talloc_free(service->periodic.te);
93 service->periodic.te = new_te;
94
95 return WERR_OK;
96 }
97
dreplsrv_periodic_run(struct dreplsrv_service * service)98 static void dreplsrv_periodic_run(struct dreplsrv_service *service)
99 {
100 TALLOC_CTX *mem_ctx;
101
102 DEBUG(4,("dreplsrv_periodic_run(): schedule pull replication\n"));
103
104 /*
105 * KCC or some administrative tool
106 * might have changed Topology graph
107 * i.e. repsFrom/repsTo
108 */
109 dreplsrv_refresh_partitions(service);
110
111 mem_ctx = talloc_new(service);
112 dreplsrv_schedule_pull_replication(service, mem_ctx);
113 talloc_free(mem_ctx);
114
115 DEBUG(4,("dreplsrv_periodic_run(): run pending_ops memory=%u\n",
116 (unsigned)talloc_total_blocks(service)));
117
118 dreplsrv_ridalloc_check_rid_pool(service);
119
120 dreplsrv_run_pending_ops(service);
121 }
122
123 /*
124 run the next pending op, either a notify or a pull
125 */
dreplsrv_run_pending_ops(struct dreplsrv_service * s)126 void dreplsrv_run_pending_ops(struct dreplsrv_service *s)
127 {
128 if (!s->ops.notifies && !s->ops.pending) {
129 return;
130 }
131 if (!s->ops.notifies ||
132 (s->ops.pending &&
133 s->ops.notifies->schedule_time > s->ops.pending->schedule_time)) {
134 dreplsrv_run_pull_ops(s);
135 } else {
136 dreplsrv_notify_run_ops(s);
137 }
138 }
139
dreplsrv_pending_pull_handler_im(struct tevent_context * ev,struct tevent_immediate * im,void * ptr)140 static void dreplsrv_pending_pull_handler_im(struct tevent_context *ev,
141 struct tevent_immediate *im,
142 void *ptr)
143 {
144 struct dreplsrv_service *service = talloc_get_type(ptr, struct dreplsrv_service);
145
146 dreplsrv_run_pull_ops(service);
147 }
148
dreplsrv_pendingops_schedule_pull_now(struct dreplsrv_service * service)149 void dreplsrv_pendingops_schedule_pull_now(struct dreplsrv_service *service)
150 {
151 tevent_schedule_immediate(service->pending.im, service->task->event_ctx,
152 dreplsrv_pending_pull_handler_im,
153 service);
154
155 return;
156 }
157
158