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/*
Unix SMB/CIFS Implementation.
DSDB replication service periodic handling
Copyright (C) Stefan Metzmacher 2007
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "lib/events/events.h"
#include "dsdb/samdb/samdb.h"
#include "auth/auth.h"
#include "samba/service.h"
#include "dsdb/repl/drepl_service.h"
#include <ldb_errors.h>
#include "../lib/util/dlinklist.h"
#include "librpc/gen_ndr/ndr_misc.h"
#include "librpc/gen_ndr/ndr_drsuapi.h"
#include "librpc/gen_ndr/ndr_drsblobs.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_DRS_REPL
static void dreplsrv_periodic_run(struct dreplsrv_service *service);
static void dreplsrv_periodic_handler_te(struct tevent_context *ev, struct tevent_timer *te,
struct timeval t, void *ptr)
{
struct dreplsrv_service *service = talloc_get_type(ptr, struct dreplsrv_service);
WERROR status;
service->periodic.te = NULL;
dreplsrv_periodic_run(service);
status = dreplsrv_periodic_schedule(service, service->periodic.interval);
if (!W_ERROR_IS_OK(status)) {
task_server_terminate(service->task, win_errstr(status), false);
return;
}
}
WERROR dreplsrv_periodic_schedule(struct dreplsrv_service *service, uint32_t next_interval)
{
TALLOC_CTX *tmp_mem;
struct tevent_timer *new_te;
struct timeval next_time;
/* prevent looping */
if (next_interval == 0) next_interval = 1;
next_time = timeval_current_ofs(next_interval, 50);
if (service->periodic.te) {
/*
* if the timestamp of the new event is higher,
* as current next we don't need to reschedule
*/
if (timeval_compare(&next_time, &service->periodic.next_event) > 0) {
return WERR_OK;
}
}
/* reset the next scheduled timestamp */
service->periodic.next_event = next_time;
new_te = tevent_add_timer(service->task->event_ctx, service,
service->periodic.next_event,
dreplsrv_periodic_handler_te, service);
W_ERROR_HAVE_NO_MEMORY(new_te);
tmp_mem = talloc_new(service);
DEBUG(4,("dreplsrv_periodic_schedule(%u) %sscheduled for: %s\n",
next_interval,
(service->periodic.te?"re":""),
nt_time_string(tmp_mem, timeval_to_nttime(&next_time))));
talloc_free(tmp_mem);
talloc_free(service->periodic.te);
service->periodic.te = new_te;
return WERR_OK;
}
static void dreplsrv_periodic_run(struct dreplsrv_service *service)
{
TALLOC_CTX *mem_ctx;
DEBUG(4,("dreplsrv_periodic_run(): schedule pull replication\n"));
/*
* KCC or some administrative tool
* might have changed Topology graph
* i.e. repsFrom/repsTo
*/
dreplsrv_refresh_partitions(service);
mem_ctx = talloc_new(service);
dreplsrv_schedule_pull_replication(service, mem_ctx);
talloc_free(mem_ctx);
DEBUG(4,("dreplsrv_periodic_run(): run pending_ops memory=%u\n",
(unsigned)talloc_total_blocks(service)));
dreplsrv_ridalloc_check_rid_pool(service);
dreplsrv_run_pending_ops(service);
}
/*
run the next pending op, either a notify or a pull
*/
void dreplsrv_run_pending_ops(struct dreplsrv_service *s)
{
if (!s->ops.notifies && !s->ops.pending) {
return;
}
if (!s->ops.notifies ||
(s->ops.pending &&
s->ops.notifies->schedule_time > s->ops.pending->schedule_time)) {
dreplsrv_run_pull_ops(s);
} else {
dreplsrv_notify_run_ops(s);
}
}
static void dreplsrv_pending_pull_handler_im(struct tevent_context *ev,
struct tevent_immediate *im,
void *ptr)
{
struct dreplsrv_service *service = talloc_get_type(ptr, struct dreplsrv_service);
dreplsrv_run_pull_ops(service);
}
void dreplsrv_pendingops_schedule_pull_now(struct dreplsrv_service *service)
{
tevent_schedule_immediate(service->pending.im, service->task->event_ctx,
dreplsrv_pending_pull_handler_im,
service);
return;
}
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