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 2 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, write to the Free Software
  19    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  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 "lib/messaging/irpc.h"
  29 #include "dsdb/repl/drepl_service.h"
  30 #include "lib/ldb/include/ldb_errors.h"
  31 #include "lib/util/dlinklist.h"
  32 #include "librpc/gen_ndr/ndr_misc.h"
  33 #include "librpc/gen_ndr/ndr_drsuapi.h"
  34 #include "librpc/gen_ndr/ndr_drsblobs.h"
  35
  36 static void dreplsrv_periodic_run(struct dreplsrv_service *service);
  37
  38 static void dreplsrv_periodic_handler_te(struct event_context *ev, struct timed_event *te,
  39                                          struct timeval t, void *ptr)
  40 {
  41         struct dreplsrv_service *service = talloc_get_type(ptr, struct dreplsrv_service);
  42         WERROR status;
  43
  44         service->periodic.te = NULL;
  45
  46         dreplsrv_periodic_run(service);
  47
  48         status = dreplsrv_periodic_schedule(service, service->periodic.interval);
  49         if (!W_ERROR_IS_OK(status)) {
  50                 task_server_terminate(service->task, win_errstr(status));
  51                 return;
  52         }
  53 }
  54
  55 WERROR dreplsrv_periodic_schedule(struct dreplsrv_service *service, uint32_t next_interval)
  56 {
  57         TALLOC_CTX *tmp_mem;
  58         struct timed_event *new_te;
  59         struct timeval next_time;
  60
  61         /* prevent looping */
  62         if (next_interval == 0) next_interval = 1;
  63
  64         next_time = timeval_current_ofs(next_interval, 50);
  65
  66         if (service->periodic.te) {
  67                 /*
  68                  * if the timestamp of the new event is higher,
  69                  * as current next we don't need to reschedule
  70                  */
  71                 if (timeval_compare(&next_time, &service->periodic.next_event) > 0) {
  72                         return WERR_OK;
  73                 }
  74         }
  75
  76         /* reset the next scheduled timestamp */
  77         service->periodic.next_event = next_time;
  78
  79         new_te = event_add_timed(service->task->event_ctx, service,
  80                                  service->periodic.next_event,
  81                                  dreplsrv_periodic_handler_te, service);
  82         W_ERROR_HAVE_NO_MEMORY(new_te);
  83
  84         tmp_mem = talloc_new(service);
  85         DEBUG(2,("dreplsrv_periodic_schedule(%u) %sscheduled for: %s\n",
  86                 next_interval,
  87                 (service->periodic.te?"re":""),
  88                 nt_time_string(tmp_mem, timeval_to_nttime(&next_time))));
  89         talloc_free(tmp_mem);
  90
  91         talloc_free(service->periodic.te);
  92         service->periodic.te = new_te;
  93
  94         return WERR_OK;
  95 }
  96
  97 static void dreplsrv_periodic_run(struct dreplsrv_service *service)
  98 {
  99         TALLOC_CTX *mem_ctx;
 100
 101         DEBUG(2,("dreplsrv_periodic_run(): schedule pull replication\n"));
 102
 103         mem_ctx = talloc_new(service);
 104         dreplsrv_schedule_pull_replication(service, mem_ctx);
 105         talloc_free(mem_ctx);
 106
 107         DEBUG(2,("dreplsrv_periodic_run(): run pending_ops\n"));
 108
 109         dreplsrv_run_pending_ops(service);
 110 }