2 Unix SMB/CIFS implementation.
3 Samba internal messaging functions
4 Copyright (C) Andrew Tridgell 2000
5 Copyright (C) 2001 by Martin Pool
6 Copyright (C) 2002 by Jeremy Allison
7 Copyright (C) 2007 by Volker Lendecke
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>.
24 @defgroup messages Internal messaging framework
28 @brief Module for internal messaging between Samba daemons.
30 The idea is that if a part of Samba wants to do communication with
31 another Samba process then it will do a message_register() of a
32 dispatch function, and use message_send_pid() to send messages to
35 The dispatch function is given the pid of the sender, and it can
36 use that to reply by message_send_pid(). See ping_message() for a
39 @caution Dispatch functions must be able to cope with incoming
40 messages on an *odd* byte boundary.
42 This system doesn't have any inherent size limitations but is not
43 very efficient for large messages or when messages are sent in very
49 #include "dbwrap/dbwrap.h"
52 #include "lib/util/tevent_unix.h"
53 #include "lib/background.h"
54 #include "lib/messages_dgm.h"
56 struct messaging_callback {
57 struct messaging_callback *prev, *next;
59 void (*fn)(struct messaging_context *msg, void *private_data,
61 struct server_id server_id, DATA_BLOB *data);
65 struct messaging_context {
67 struct tevent_context *event_ctx;
68 struct messaging_callback *callbacks;
70 struct tevent_req **new_waiters;
71 unsigned num_new_waiters;
73 struct tevent_req **waiters;
76 struct messaging_backend *remote;
79 struct messaging_hdr {
85 /****************************************************************************
86 A useful function for testing the message system.
87 ****************************************************************************/
89 static void ping_message(struct messaging_context *msg_ctx,
95 struct server_id_buf idbuf;
97 DEBUG(1, ("INFO: Received PING message from PID %s [%.*s]\n",
98 server_id_str_buf(src, &idbuf), (int)data->length,
99 data->data ? (char *)data->data : ""));
101 messaging_send(msg_ctx, src, MSG_PONG, data);
104 /****************************************************************************
105 Register/replace a dispatch function for a particular message type.
106 JRA changed Dec 13 2006. Only one message handler now permitted per type.
107 *NOTE*: Dispatch functions must be able to cope with incoming
108 messages on an *odd* byte boundary.
109 ****************************************************************************/
112 struct messaging_context *msg_ctx;
120 /****************************************************************************
121 Send one of the messages for the broadcast.
122 ****************************************************************************/
124 static int traverse_fn(struct db_record *rec, const struct server_id *id,
125 uint32_t msg_flags, void *state)
127 struct msg_all *msg_all = (struct msg_all *)state;
130 /* Don't send if the receiver hasn't registered an interest. */
132 if((msg_flags & msg_all->msg_flag) == 0) {
136 /* If the msg send fails because the pid was not found (i.e. smbd died),
137 * the msg has already been deleted from the messages.tdb.*/
139 status = messaging_send_buf(msg_all->msg_ctx, *id, msg_all->msg_type,
140 (const uint8_t *)msg_all->buf, msg_all->len);
142 if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_HANDLE)) {
143 struct server_id_buf idbuf;
146 * If the pid was not found delete the entry from
150 DEBUG(2, ("pid %s doesn't exist\n",
151 server_id_str_buf(*id, &idbuf)));
153 dbwrap_record_delete(rec);
160 * Send a message to all smbd processes.
162 * It isn't very efficient, but should be OK for the sorts of
163 * applications that use it. When we need efficient broadcast we can add
166 * @param n_sent Set to the number of messages sent. This should be
167 * equal to the number of processes, but be careful for races.
169 * @retval True for success.
171 bool message_send_all(struct messaging_context *msg_ctx,
173 const void *buf, size_t len,
176 struct msg_all msg_all;
178 msg_all.msg_type = msg_type;
179 if (msg_type < 0x100) {
180 msg_all.msg_flag = FLAG_MSG_GENERAL;
181 } else if (msg_type > 0x100 && msg_type < 0x200) {
182 msg_all.msg_flag = FLAG_MSG_NMBD;
183 } else if (msg_type > 0x200 && msg_type < 0x300) {
184 msg_all.msg_flag = FLAG_MSG_PRINT_GENERAL;
185 } else if (msg_type > 0x300 && msg_type < 0x400) {
186 msg_all.msg_flag = FLAG_MSG_SMBD;
187 } else if (msg_type > 0x400 && msg_type < 0x600) {
188 msg_all.msg_flag = FLAG_MSG_WINBIND;
189 } else if (msg_type > 4000 && msg_type < 5000) {
190 msg_all.msg_flag = FLAG_MSG_DBWRAP;
198 msg_all.msg_ctx = msg_ctx;
200 serverid_traverse(traverse_fn, &msg_all);
202 *n_sent = msg_all.n_sent;
206 static void messaging_recv_cb(const uint8_t *msg, size_t msg_len,
207 const int *fds, size_t num_fds,
210 struct messaging_context *msg_ctx = talloc_get_type_abort(
211 private_data, struct messaging_context);
212 const struct messaging_hdr *hdr;
213 struct server_id_buf idbuf;
214 struct messaging_rec rec;
215 int64_t fds64[MIN(num_fds, INT8_MAX)];
218 if (msg_len < sizeof(*hdr)) {
219 for (i=0; i < num_fds; i++) {
222 DEBUG(1, ("message too short: %u\n", (unsigned)msg_len));
226 if (num_fds > INT8_MAX) {
227 for (i=0; i < num_fds; i++) {
230 DEBUG(1, ("too many fds: %u\n", (unsigned)num_fds));
234 for (i=0; i < num_fds; i++) {
239 * messages_dgm guarantees alignment, so we can cast here
241 hdr = (const struct messaging_hdr *)msg;
243 DEBUG(10, ("%s: Received message 0x%x len %u (num_fds:%u) from %s\n",
244 __func__, (unsigned)hdr->msg_type,
245 (unsigned)(msg_len - sizeof(*hdr)),
247 server_id_str_buf(hdr->src, &idbuf)));
249 rec = (struct messaging_rec) {
250 .msg_version = MESSAGE_VERSION,
251 .msg_type = hdr->msg_type,
254 .buf.data = discard_const_p(uint8, msg) + sizeof(*hdr),
255 .buf.length = msg_len - sizeof(*hdr),
260 messaging_dispatch_rec(msg_ctx, &rec);
263 static int messaging_context_destructor(struct messaging_context *ctx)
265 messaging_dgm_destroy();
269 struct messaging_context *messaging_init(TALLOC_CTX *mem_ctx,
270 struct tevent_context *ev)
272 struct messaging_context *ctx;
276 if (!(ctx = talloc_zero(mem_ctx, struct messaging_context))) {
280 ctx->id = procid_self();
285 ret = messaging_dgm_init(ctx->event_ctx, ctx->id,
286 lp_cache_directory(), sec_initial_uid(),
287 messaging_recv_cb, ctx);
290 DEBUG(2, ("messaging_dgm_init failed: %s\n", strerror(ret)));
295 talloc_set_destructor(ctx, messaging_context_destructor);
297 if (lp_clustering()) {
298 status = messaging_ctdbd_init(ctx, ctx, &ctx->remote);
300 if (!NT_STATUS_IS_OK(status)) {
301 DEBUG(2, ("messaging_ctdbd_init failed: %s\n",
307 ctx->id.vnn = get_my_vnn();
309 messaging_register(ctx, NULL, MSG_PING, ping_message);
311 /* Register some debugging related messages */
313 register_msg_pool_usage(ctx);
314 register_dmalloc_msgs(ctx);
315 debug_register_msgs(ctx);
320 struct server_id messaging_server_id(const struct messaging_context *msg_ctx)
326 * re-init after a fork
328 NTSTATUS messaging_reinit(struct messaging_context *msg_ctx)
333 messaging_dgm_destroy();
335 msg_ctx->id = procid_self();
337 ret = messaging_dgm_init(msg_ctx->event_ctx, msg_ctx->id,
338 lp_cache_directory(), sec_initial_uid(),
339 messaging_recv_cb, msg_ctx);
341 DEBUG(0, ("messaging_dgm_init failed: %s\n", strerror(errno)));
342 return map_nt_error_from_unix(ret);
345 TALLOC_FREE(msg_ctx->remote);
347 if (lp_clustering()) {
348 status = messaging_ctdbd_init(msg_ctx, msg_ctx,
351 if (!NT_STATUS_IS_OK(status)) {
352 DEBUG(1, ("messaging_ctdbd_init failed: %s\n",
363 * Register a dispatch function for a particular message type. Allow multiple
366 NTSTATUS messaging_register(struct messaging_context *msg_ctx,
369 void (*fn)(struct messaging_context *msg,
372 struct server_id server_id,
375 struct messaging_callback *cb;
377 DEBUG(5, ("Registering messaging pointer for type %u - "
379 (unsigned)msg_type, private_data));
382 * Only one callback per type
385 for (cb = msg_ctx->callbacks; cb != NULL; cb = cb->next) {
386 /* we allow a second registration of the same message
387 type if it has a different private pointer. This is
388 needed in, for example, the internal notify code,
389 which creates a new notify context for each tree
390 connect, and expects to receive messages to each of
392 if (cb->msg_type == msg_type && private_data == cb->private_data) {
393 DEBUG(5,("Overriding messaging pointer for type %u - private_data=%p\n",
394 (unsigned)msg_type, private_data));
396 cb->private_data = private_data;
401 if (!(cb = talloc(msg_ctx, struct messaging_callback))) {
402 return NT_STATUS_NO_MEMORY;
405 cb->msg_type = msg_type;
407 cb->private_data = private_data;
409 DLIST_ADD(msg_ctx->callbacks, cb);
414 De-register the function for a particular message type.
416 void messaging_deregister(struct messaging_context *ctx, uint32_t msg_type,
419 struct messaging_callback *cb, *next;
421 for (cb = ctx->callbacks; cb; cb = next) {
423 if ((cb->msg_type == msg_type)
424 && (cb->private_data == private_data)) {
425 DEBUG(5,("Deregistering messaging pointer for type %u - private_data=%p\n",
426 (unsigned)msg_type, private_data));
427 DLIST_REMOVE(ctx->callbacks, cb);
434 Send a message to a particular server
436 NTSTATUS messaging_send(struct messaging_context *msg_ctx,
437 struct server_id server, uint32_t msg_type,
438 const DATA_BLOB *data)
442 iov.iov_base = data->data;
443 iov.iov_len = data->length;
445 return messaging_send_iov(msg_ctx, server, msg_type, &iov, 1, NULL, 0);
448 NTSTATUS messaging_send_buf(struct messaging_context *msg_ctx,
449 struct server_id server, uint32_t msg_type,
450 const uint8_t *buf, size_t len)
452 DATA_BLOB blob = data_blob_const(buf, len);
453 return messaging_send(msg_ctx, server, msg_type, &blob);
456 NTSTATUS messaging_send_iov(struct messaging_context *msg_ctx,
457 struct server_id server, uint32_t msg_type,
458 const struct iovec *iov, int iovlen,
459 const int *fds, size_t num_fds)
462 struct messaging_hdr hdr;
463 struct iovec iov2[iovlen+1];
465 if (server_id_is_disconnected(&server)) {
466 return NT_STATUS_INVALID_PARAMETER_MIX;
469 if (num_fds > INT8_MAX) {
470 return NT_STATUS_INVALID_PARAMETER_MIX;
473 if (!procid_is_local(&server)) {
475 return NT_STATUS_NOT_SUPPORTED;
478 ret = msg_ctx->remote->send_fn(msg_ctx->id, server,
479 msg_type, iov, iovlen,
483 return map_nt_error_from_unix(ret);
488 if (server_id_same_process(&msg_ctx->id, &server)) {
489 struct messaging_rec rec;
493 * Self-send, directly dispatch
497 return NT_STATUS_NOT_SUPPORTED;
500 buf = iov_buf(talloc_tos(), iov, iovlen);
502 return NT_STATUS_NO_MEMORY;
505 rec = (struct messaging_rec) {
506 .msg_version = MESSAGE_VERSION,
507 .msg_type = msg_type & MSG_TYPE_MASK,
510 .buf = data_blob_const(buf, talloc_get_size(buf)),
513 messaging_dispatch_rec(msg_ctx, &rec);
518 hdr = (struct messaging_hdr) {
519 .msg_type = msg_type,
523 iov2[0] = (struct iovec){ .iov_base = &hdr, .iov_len = sizeof(hdr) };
524 memcpy(&iov2[1], iov, iovlen * sizeof(*iov));
527 ret = messaging_dgm_send(server.pid, iov2, iovlen+1, fds, num_fds);
531 return map_nt_error_from_unix(ret);
536 static struct messaging_rec *messaging_rec_dup(TALLOC_CTX *mem_ctx,
537 struct messaging_rec *rec)
539 struct messaging_rec *result;
540 size_t fds_size = sizeof(int64_t) * rec->num_fds;
542 result = talloc_pooled_object(mem_ctx, struct messaging_rec, 2,
543 rec->buf.length + fds_size);
544 if (result == NULL) {
549 /* Doesn't fail, see talloc_pooled_object */
551 result->buf.data = talloc_memdup(result, rec->buf.data,
555 if (result->num_fds > 0) {
556 result->fds = talloc_array(result, int64_t, result->num_fds);
557 memcpy(result->fds, rec->fds, fds_size);
563 struct messaging_filtered_read_state {
564 struct tevent_context *ev;
565 struct messaging_context *msg_ctx;
568 bool (*filter)(struct messaging_rec *rec, void *private_data);
571 struct messaging_rec *rec;
574 static void messaging_filtered_read_cleanup(struct tevent_req *req,
575 enum tevent_req_state req_state);
577 struct tevent_req *messaging_filtered_read_send(
578 TALLOC_CTX *mem_ctx, struct tevent_context *ev,
579 struct messaging_context *msg_ctx,
580 bool (*filter)(struct messaging_rec *rec, void *private_data),
583 struct tevent_req *req;
584 struct messaging_filtered_read_state *state;
585 size_t new_waiters_len;
587 req = tevent_req_create(mem_ctx, &state,
588 struct messaging_filtered_read_state);
593 state->msg_ctx = msg_ctx;
594 state->filter = filter;
595 state->private_data = private_data;
598 * We have to defer the callback here, as we might be called from
599 * within a different tevent_context than state->ev
601 tevent_req_defer_callback(req, state->ev);
603 state->tevent_handle = messaging_dgm_register_tevent_context(
605 if (tevent_req_nomem(state, req)) {
606 return tevent_req_post(req, ev);
610 * We add ourselves to the "new_waiters" array, not the "waiters"
611 * array. If we are called from within messaging_read_done,
612 * messaging_dispatch_rec will be in an active for-loop on
613 * "waiters". We must be careful not to mess with this array, because
614 * it could mean that a single event is being delivered twice.
617 new_waiters_len = talloc_array_length(msg_ctx->new_waiters);
619 if (new_waiters_len == msg_ctx->num_new_waiters) {
620 struct tevent_req **tmp;
622 tmp = talloc_realloc(msg_ctx, msg_ctx->new_waiters,
623 struct tevent_req *, new_waiters_len+1);
624 if (tevent_req_nomem(tmp, req)) {
625 return tevent_req_post(req, ev);
627 msg_ctx->new_waiters = tmp;
630 msg_ctx->new_waiters[msg_ctx->num_new_waiters] = req;
631 msg_ctx->num_new_waiters += 1;
632 tevent_req_set_cleanup_fn(req, messaging_filtered_read_cleanup);
637 static void messaging_filtered_read_cleanup(struct tevent_req *req,
638 enum tevent_req_state req_state)
640 struct messaging_filtered_read_state *state = tevent_req_data(
641 req, struct messaging_filtered_read_state);
642 struct messaging_context *msg_ctx = state->msg_ctx;
645 tevent_req_set_cleanup_fn(req, NULL);
647 TALLOC_FREE(state->tevent_handle);
650 * Just set the [new_]waiters entry to NULL, be careful not to mess
651 * with the other "waiters" array contents. We are often called from
652 * within "messaging_dispatch_rec", which loops over
653 * "waiters". Messing with the "waiters" array will mess up that
657 for (i=0; i<msg_ctx->num_waiters; i++) {
658 if (msg_ctx->waiters[i] == req) {
659 msg_ctx->waiters[i] = NULL;
664 for (i=0; i<msg_ctx->num_new_waiters; i++) {
665 if (msg_ctx->new_waiters[i] == req) {
666 msg_ctx->new_waiters[i] = NULL;
672 static void messaging_filtered_read_done(struct tevent_req *req,
673 struct messaging_rec *rec)
675 struct messaging_filtered_read_state *state = tevent_req_data(
676 req, struct messaging_filtered_read_state);
678 state->rec = messaging_rec_dup(state, rec);
679 if (tevent_req_nomem(state->rec, req)) {
682 tevent_req_done(req);
685 int messaging_filtered_read_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
686 struct messaging_rec **presult)
688 struct messaging_filtered_read_state *state = tevent_req_data(
689 req, struct messaging_filtered_read_state);
692 if (tevent_req_is_unix_error(req, &err)) {
693 tevent_req_received(req);
696 *presult = talloc_move(mem_ctx, &state->rec);
700 struct messaging_read_state {
702 struct messaging_rec *rec;
705 static bool messaging_read_filter(struct messaging_rec *rec,
707 static void messaging_read_done(struct tevent_req *subreq);
709 struct tevent_req *messaging_read_send(TALLOC_CTX *mem_ctx,
710 struct tevent_context *ev,
711 struct messaging_context *msg,
714 struct tevent_req *req, *subreq;
715 struct messaging_read_state *state;
717 req = tevent_req_create(mem_ctx, &state,
718 struct messaging_read_state);
722 state->msg_type = msg_type;
724 subreq = messaging_filtered_read_send(state, ev, msg,
725 messaging_read_filter, state);
726 if (tevent_req_nomem(subreq, req)) {
727 return tevent_req_post(req, ev);
729 tevent_req_set_callback(subreq, messaging_read_done, req);
733 static bool messaging_read_filter(struct messaging_rec *rec,
736 struct messaging_read_state *state = talloc_get_type_abort(
737 private_data, struct messaging_read_state);
739 if (rec->num_fds != 0) {
743 return rec->msg_type == state->msg_type;
746 static void messaging_read_done(struct tevent_req *subreq)
748 struct tevent_req *req = tevent_req_callback_data(
749 subreq, struct tevent_req);
750 struct messaging_read_state *state = tevent_req_data(
751 req, struct messaging_read_state);
754 ret = messaging_filtered_read_recv(subreq, state, &state->rec);
756 if (tevent_req_error(req, ret)) {
759 tevent_req_done(req);
762 int messaging_read_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
763 struct messaging_rec **presult)
765 struct messaging_read_state *state = tevent_req_data(
766 req, struct messaging_read_state);
769 if (tevent_req_is_unix_error(req, &err)) {
772 if (presult != NULL) {
773 *presult = talloc_move(mem_ctx, &state->rec);
778 static bool messaging_append_new_waiters(struct messaging_context *msg_ctx)
780 if (msg_ctx->num_new_waiters == 0) {
784 if (talloc_array_length(msg_ctx->waiters) <
785 (msg_ctx->num_waiters + msg_ctx->num_new_waiters)) {
786 struct tevent_req **tmp;
787 tmp = talloc_realloc(
788 msg_ctx, msg_ctx->waiters, struct tevent_req *,
789 msg_ctx->num_waiters + msg_ctx->num_new_waiters);
791 DEBUG(1, ("%s: talloc failed\n", __func__));
794 msg_ctx->waiters = tmp;
797 memcpy(&msg_ctx->waiters[msg_ctx->num_waiters], msg_ctx->new_waiters,
798 sizeof(struct tevent_req *) * msg_ctx->num_new_waiters);
800 msg_ctx->num_waiters += msg_ctx->num_new_waiters;
801 msg_ctx->num_new_waiters = 0;
806 struct messaging_defer_callback_state {
807 struct messaging_context *msg_ctx;
808 struct messaging_rec *rec;
809 void (*fn)(struct messaging_context *msg, void *private_data,
810 uint32_t msg_type, struct server_id server_id,
815 static void messaging_defer_callback_trigger(struct tevent_context *ev,
816 struct tevent_immediate *im,
819 static void messaging_defer_callback(
820 struct messaging_context *msg_ctx, struct messaging_rec *rec,
821 void (*fn)(struct messaging_context *msg, void *private_data,
822 uint32_t msg_type, struct server_id server_id,
826 struct messaging_defer_callback_state *state;
827 struct tevent_immediate *im;
829 state = talloc(msg_ctx, struct messaging_defer_callback_state);
831 DEBUG(1, ("talloc failed\n"));
834 state->msg_ctx = msg_ctx;
836 state->private_data = private_data;
838 state->rec = messaging_rec_dup(state, rec);
839 if (state->rec == NULL) {
840 DEBUG(1, ("talloc failed\n"));
845 im = tevent_create_immediate(state);
847 DEBUG(1, ("tevent_create_immediate failed\n"));
851 tevent_schedule_immediate(im, msg_ctx->event_ctx,
852 messaging_defer_callback_trigger, state);
855 static void messaging_defer_callback_trigger(struct tevent_context *ev,
856 struct tevent_immediate *im,
859 struct messaging_defer_callback_state *state = talloc_get_type_abort(
860 private_data, struct messaging_defer_callback_state);
861 struct messaging_rec *rec = state->rec;
863 state->fn(state->msg_ctx, state->private_data, rec->msg_type, rec->src,
869 Dispatch one messaging_rec
871 void messaging_dispatch_rec(struct messaging_context *msg_ctx,
872 struct messaging_rec *rec)
874 struct messaging_callback *cb, *next;
878 for (cb = msg_ctx->callbacks; cb != NULL; cb = next) {
880 if (cb->msg_type != rec->msg_type) {
885 * the old style callbacks don't support fd passing
887 for (j=0; j < rec->num_fds; j++) {
888 int fd = rec->fds[j];
894 if (server_id_same_process(&rec->src, &rec->dest)) {
896 * This is a self-send. We are called here from
897 * messaging_send(), and we don't want to directly
898 * recurse into the callback but go via a
901 messaging_defer_callback(msg_ctx, rec, cb->fn,
905 * This comes from a different process. we are called
906 * from the event loop, so we should call back
909 cb->fn(msg_ctx, cb->private_data, rec->msg_type,
910 rec->src, &rec->buf);
913 * we continue looking for matching messages after finding
914 * one. This matters for subsystems like the internal notify
915 * code which register more than one handler for the same
920 if (!messaging_append_new_waiters(msg_ctx)) {
921 for (j=0; j < rec->num_fds; j++) {
922 int fd = rec->fds[j];
931 while (i < msg_ctx->num_waiters) {
932 struct tevent_req *req;
933 struct messaging_filtered_read_state *state;
935 req = msg_ctx->waiters[i];
938 * This got cleaned up. In the meantime,
939 * move everything down one. We need
940 * to keep the order of waiters, as
941 * other code may depend on this.
943 if (i < msg_ctx->num_waiters - 1) {
944 memmove(&msg_ctx->waiters[i],
945 &msg_ctx->waiters[i+1],
946 sizeof(struct tevent_req *) *
947 (msg_ctx->num_waiters - i - 1));
949 msg_ctx->num_waiters -= 1;
953 state = tevent_req_data(
954 req, struct messaging_filtered_read_state);
955 if (state->filter(rec, state->private_data)) {
956 messaging_filtered_read_done(req, rec);
959 * Only the first one gets the fd-array
969 * If the fd-array isn't used, just close it.
971 for (j=0; j < rec->num_fds; j++) {
972 int fd = rec->fds[j];
979 static int mess_parent_dgm_cleanup(void *private_data);
980 static void mess_parent_dgm_cleanup_done(struct tevent_req *req);
982 bool messaging_parent_dgm_cleanup_init(struct messaging_context *msg)
984 struct tevent_req *req;
986 req = background_job_send(
987 msg, msg->event_ctx, msg, NULL, 0,
988 lp_parm_int(-1, "messaging", "messaging dgm cleanup interval",
990 mess_parent_dgm_cleanup, msg);
994 tevent_req_set_callback(req, mess_parent_dgm_cleanup_done, msg);
998 static int mess_parent_dgm_cleanup(void *private_data)
1002 ret = messaging_dgm_wipe();
1003 DEBUG(10, ("messaging_dgm_wipe returned %s\n",
1004 ret ? strerror(ret) : "ok"));
1005 return lp_parm_int(-1, "messaging", "messaging dgm cleanup interval",
1009 static void mess_parent_dgm_cleanup_done(struct tevent_req *req)
1011 struct messaging_context *msg = tevent_req_callback_data(
1012 req, struct messaging_context);
1015 status = background_job_recv(req);
1017 DEBUG(1, ("messaging dgm cleanup job ended with %s\n",
1018 nt_errstr(status)));
1020 req = background_job_send(
1021 msg, msg->event_ctx, msg, NULL, 0,
1022 lp_parm_int(-1, "messaging", "messaging dgm cleanup interval",
1024 mess_parent_dgm_cleanup, msg);
1026 DEBUG(1, ("background_job_send failed\n"));
1028 tevent_req_set_callback(req, mess_parent_dgm_cleanup_done, msg);
1031 int messaging_cleanup(struct messaging_context *msg_ctx, pid_t pid)
1036 ret = messaging_dgm_wipe();
1038 ret = messaging_dgm_cleanup(pid);
1044 struct tevent_context *messaging_tevent_context(
1045 struct messaging_context *msg_ctx)
1047 return msg_ctx->event_ctx;