source4/dsdb/repl/drepl_periodic.c

   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 "lib/messaging/irpc.h"
  28 #include "dsdb/repl/drepl_service.h"
  29 #include "lib/ldb/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
  35 static void dreplsrv_periodic_run(struct dreplsrv_service *service);
  36
  37 static void dreplsrv_periodic_handler_te(struct tevent_context *ev, struct tevent_timer *te,
  38                                          struct timeval t, void *ptr)
  39 {
  40         struct dreplsrv_service *service = talloc_get_type(ptr, struct dreplsrv_service);
  41         WERROR status;
  42
  43         service->periodic.te = NULL;
  44
  45         dreplsrv_periodic_run(service);
  46
  47         status = dreplsrv_periodic_schedule(service, service->periodic.interval);
  48         if (!W_ERROR_IS_OK(status)) {
  49                 task_server_terminate(service->task, win_errstr(status));
  50                 return;
  51         }
  52 }
  53
  54 WERROR dreplsrv_periodic_schedule(struct dreplsrv_service *service, uint32_t next_interval)
  55 {
  56         TALLOC_CTX *tmp_mem;
  57         struct tevent_timer *new_te;
  58         struct timeval next_time;
  59
  60         /* prevent looping */
  61         if (next_interval == 0) next_interval = 1;
  62
  63         next_time = timeval_current_ofs(next_interval, 50);
  64
  65         if (service->periodic.te) {
  66                 /*
  67                  * if the timestamp of the new event is higher,
  68                  * as current next we don't need to reschedule
  69                  */
  70                 if (timeval_compare(&next_time, &service->periodic.next_event) > 0) {
  71                         return WERR_OK;
  72                 }
  73         }
  74
  75         /* reset the next scheduled timestamp */
  76         service->periodic.next_event = next_time;
  77
  78         new_te = event_add_timed(service->task->event_ctx, service,
  79                                  service->periodic.next_event,
  80                                  dreplsrv_periodic_handler_te, service);
  81         W_ERROR_HAVE_NO_MEMORY(new_te);
  82
  83         tmp_mem = talloc_new(service);
  84         DEBUG(2,("dreplsrv_periodic_schedule(%u) %sscheduled for: %s\n",
  85                 next_interval,
  86                 (service->periodic.te?"re":""),
  87                 nt_time_string(tmp_mem, timeval_to_nttime(&next_time))));
  88         talloc_free(tmp_mem);
  89
  90         talloc_free(service->periodic.te);
  91         service->periodic.te = new_te;
  92
  93         return WERR_OK;
  94 }
  95
  96 static void dreplsrv_periodic_run(struct dreplsrv_service *service)
  97 {
  98         TALLOC_CTX *mem_ctx;
  99
 100         DEBUG(2,("dreplsrv_periodic_run(): schedule pull replication\n"));
 101
 102         mem_ctx = talloc_new(service);
 103         dreplsrv_schedule_pull_replication(service, mem_ctx);
 104         talloc_free(mem_ctx);
 105
 106         DEBUG(2,("dreplsrv_periodic_run(): run pending_ops memory=%u\n",
 107                  (unsigned)talloc_total_blocks(service)));
 108
 109         /* the KCC might have changed repsFrom */
 110         dreplsrv_refresh_partitions(service);
 111
 112         dreplsrv_run_pending_ops(service);
 113 }