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"
55 #include "lib/iov_buf.h"
56 #include "lib/util/server_id_db.h"
58 struct messaging_callback {
59 struct messaging_callback *prev, *next;
61 void (*fn)(struct messaging_context *msg, void *private_data,
63 struct server_id server_id, DATA_BLOB *data);
67 struct messaging_context {
69 struct tevent_context *event_ctx;
70 struct messaging_callback *callbacks;
72 struct tevent_req **new_waiters;
73 unsigned num_new_waiters;
75 struct tevent_req **waiters;
78 struct messaging_backend *remote;
80 struct server_id_db *names_db;
83 struct messaging_hdr {
89 /****************************************************************************
90 A useful function for testing the message system.
91 ****************************************************************************/
93 static void ping_message(struct messaging_context *msg_ctx,
99 struct server_id_buf idbuf;
101 DEBUG(1, ("INFO: Received PING message from PID %s [%.*s]\n",
102 server_id_str_buf(src, &idbuf), (int)data->length,
103 data->data ? (char *)data->data : ""));
105 messaging_send(msg_ctx, src, MSG_PONG, data);
108 /****************************************************************************
109 Register/replace a dispatch function for a particular message type.
110 JRA changed Dec 13 2006. Only one message handler now permitted per type.
111 *NOTE*: Dispatch functions must be able to cope with incoming
112 messages on an *odd* byte boundary.
113 ****************************************************************************/
116 struct messaging_context *msg_ctx;
124 /****************************************************************************
125 Send one of the messages for the broadcast.
126 ****************************************************************************/
128 static int traverse_fn(struct db_record *rec, const struct server_id *id,
129 uint32_t msg_flags, void *state)
131 struct msg_all *msg_all = (struct msg_all *)state;
134 /* Don't send if the receiver hasn't registered an interest. */
136 if((msg_flags & msg_all->msg_flag) == 0) {
140 /* If the msg send fails because the pid was not found (i.e. smbd died),
141 * the msg has already been deleted from the messages.tdb.*/
143 status = messaging_send_buf(msg_all->msg_ctx, *id, msg_all->msg_type,
144 (const uint8_t *)msg_all->buf, msg_all->len);
146 if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_HANDLE)) {
147 struct server_id_buf idbuf;
150 * If the pid was not found delete the entry from
154 DEBUG(2, ("pid %s doesn't exist\n",
155 server_id_str_buf(*id, &idbuf)));
157 dbwrap_record_delete(rec);
164 * Send a message to all smbd processes.
166 * It isn't very efficient, but should be OK for the sorts of
167 * applications that use it. When we need efficient broadcast we can add
170 * @param n_sent Set to the number of messages sent. This should be
171 * equal to the number of processes, but be careful for races.
173 * @retval True for success.
175 bool message_send_all(struct messaging_context *msg_ctx,
177 const void *buf, size_t len,
180 struct msg_all msg_all;
182 msg_all.msg_type = msg_type;
183 if (msg_type < 0x100) {
184 msg_all.msg_flag = FLAG_MSG_GENERAL;
185 } else if (msg_type > 0x100 && msg_type < 0x200) {
186 msg_all.msg_flag = FLAG_MSG_NMBD;
187 } else if (msg_type > 0x200 && msg_type < 0x300) {
188 msg_all.msg_flag = FLAG_MSG_PRINT_GENERAL;
189 } else if (msg_type > 0x300 && msg_type < 0x400) {
190 msg_all.msg_flag = FLAG_MSG_SMBD;
191 } else if (msg_type > 0x400 && msg_type < 0x600) {
192 msg_all.msg_flag = FLAG_MSG_WINBIND;
193 } else if (msg_type > 4000 && msg_type < 5000) {
194 msg_all.msg_flag = FLAG_MSG_DBWRAP;
202 msg_all.msg_ctx = msg_ctx;
204 serverid_traverse(traverse_fn, &msg_all);
206 *n_sent = msg_all.n_sent;
210 static void messaging_recv_cb(const uint8_t *msg, size_t msg_len,
211 int *fds, size_t num_fds,
214 struct messaging_context *msg_ctx = talloc_get_type_abort(
215 private_data, struct messaging_context);
216 const struct messaging_hdr *hdr;
217 struct server_id_buf idbuf;
218 struct messaging_rec rec;
219 int64_t fds64[MIN(num_fds, INT8_MAX)];
222 if (msg_len < sizeof(*hdr)) {
223 for (i=0; i < num_fds; i++) {
226 DEBUG(1, ("message too short: %u\n", (unsigned)msg_len));
230 if (num_fds > INT8_MAX) {
231 for (i=0; i < num_fds; i++) {
234 DEBUG(1, ("too many fds: %u\n", (unsigned)num_fds));
239 * "consume" the fds by copying them and setting
240 * the original variable to -1
242 for (i=0; i < num_fds; i++) {
248 * messages_dgm guarantees alignment, so we can cast here
250 hdr = (const struct messaging_hdr *)msg;
252 DEBUG(10, ("%s: Received message 0x%x len %u (num_fds:%u) from %s\n",
253 __func__, (unsigned)hdr->msg_type,
254 (unsigned)(msg_len - sizeof(*hdr)),
256 server_id_str_buf(hdr->src, &idbuf)));
258 rec = (struct messaging_rec) {
259 .msg_version = MESSAGE_VERSION,
260 .msg_type = hdr->msg_type,
263 .buf.data = discard_const_p(uint8, msg) + sizeof(*hdr),
264 .buf.length = msg_len - sizeof(*hdr),
269 messaging_dispatch_rec(msg_ctx, &rec);
272 static int messaging_context_destructor(struct messaging_context *ctx)
276 messaging_dgm_destroy();
278 for (i=0; i<ctx->num_new_waiters; i++) {
279 if (ctx->new_waiters[i] != NULL) {
280 tevent_req_set_cleanup_fn(ctx->new_waiters[i], NULL);
281 ctx->new_waiters[i] = NULL;
284 for (i=0; i<ctx->num_waiters; i++) {
285 if (ctx->waiters[i] != NULL) {
286 tevent_req_set_cleanup_fn(ctx->waiters[i], NULL);
287 ctx->waiters[i] = NULL;
294 struct messaging_context *messaging_init(TALLOC_CTX *mem_ctx,
295 struct tevent_context *ev)
297 struct messaging_context *ctx;
301 if (!(ctx = talloc_zero(mem_ctx, struct messaging_context))) {
305 ctx->id = procid_self();
310 ret = messaging_dgm_init(ctx->event_ctx, ctx->id,
311 lp_cache_directory(), sec_initial_uid(),
312 messaging_recv_cb, ctx);
315 DEBUG(2, ("messaging_dgm_init failed: %s\n", strerror(ret)));
320 ctx->names_db = server_id_db_init(
321 ctx, ctx->id, lp_cache_directory(), 0,
322 TDB_INCOMPATIBLE_HASH|TDB_CLEAR_IF_FIRST);
323 if (ctx->names_db == NULL) {
324 DEBUG(10, ("%s: server_id_db_init failed\n", __func__));
329 talloc_set_destructor(ctx, messaging_context_destructor);
331 if (lp_clustering()) {
332 status = messaging_ctdbd_init(ctx, ctx, &ctx->remote);
334 if (!NT_STATUS_IS_OK(status)) {
335 DEBUG(2, ("messaging_ctdbd_init failed: %s\n",
341 ctx->id.vnn = get_my_vnn();
343 messaging_register(ctx, NULL, MSG_PING, ping_message);
345 /* Register some debugging related messages */
347 register_msg_pool_usage(ctx);
348 register_dmalloc_msgs(ctx);
349 debug_register_msgs(ctx);
354 struct server_id messaging_server_id(const struct messaging_context *msg_ctx)
360 * re-init after a fork
362 NTSTATUS messaging_reinit(struct messaging_context *msg_ctx)
367 messaging_dgm_destroy();
369 msg_ctx->id = procid_self();
371 ret = messaging_dgm_init(msg_ctx->event_ctx, msg_ctx->id,
372 lp_cache_directory(), sec_initial_uid(),
373 messaging_recv_cb, msg_ctx);
375 DEBUG(0, ("messaging_dgm_init failed: %s\n", strerror(errno)));
376 return map_nt_error_from_unix(ret);
379 TALLOC_FREE(msg_ctx->remote);
381 if (lp_clustering()) {
382 status = messaging_ctdbd_init(msg_ctx, msg_ctx,
385 if (!NT_STATUS_IS_OK(status)) {
386 DEBUG(1, ("messaging_ctdbd_init failed: %s\n",
392 server_id_db_reinit(msg_ctx->names_db, msg_ctx->id);
399 * Register a dispatch function for a particular message type. Allow multiple
402 NTSTATUS messaging_register(struct messaging_context *msg_ctx,
405 void (*fn)(struct messaging_context *msg,
408 struct server_id server_id,
411 struct messaging_callback *cb;
413 DEBUG(5, ("Registering messaging pointer for type %u - "
415 (unsigned)msg_type, private_data));
418 * Only one callback per type
421 for (cb = msg_ctx->callbacks; cb != NULL; cb = cb->next) {
422 /* we allow a second registration of the same message
423 type if it has a different private pointer. This is
424 needed in, for example, the internal notify code,
425 which creates a new notify context for each tree
426 connect, and expects to receive messages to each of
428 if (cb->msg_type == msg_type && private_data == cb->private_data) {
429 DEBUG(5,("Overriding messaging pointer for type %u - private_data=%p\n",
430 (unsigned)msg_type, private_data));
432 cb->private_data = private_data;
437 if (!(cb = talloc(msg_ctx, struct messaging_callback))) {
438 return NT_STATUS_NO_MEMORY;
441 cb->msg_type = msg_type;
443 cb->private_data = private_data;
445 DLIST_ADD(msg_ctx->callbacks, cb);
450 De-register the function for a particular message type.
452 void messaging_deregister(struct messaging_context *ctx, uint32_t msg_type,
455 struct messaging_callback *cb, *next;
457 for (cb = ctx->callbacks; cb; cb = next) {
459 if ((cb->msg_type == msg_type)
460 && (cb->private_data == private_data)) {
461 DEBUG(5,("Deregistering messaging pointer for type %u - private_data=%p\n",
462 (unsigned)msg_type, private_data));
463 DLIST_REMOVE(ctx->callbacks, cb);
470 Send a message to a particular server
472 NTSTATUS messaging_send(struct messaging_context *msg_ctx,
473 struct server_id server, uint32_t msg_type,
474 const DATA_BLOB *data)
478 iov.iov_base = data->data;
479 iov.iov_len = data->length;
481 return messaging_send_iov(msg_ctx, server, msg_type, &iov, 1, NULL, 0);
484 NTSTATUS messaging_send_buf(struct messaging_context *msg_ctx,
485 struct server_id server, uint32_t msg_type,
486 const uint8_t *buf, size_t len)
488 DATA_BLOB blob = data_blob_const(buf, len);
489 return messaging_send(msg_ctx, server, msg_type, &blob);
492 NTSTATUS messaging_send_iov_from(struct messaging_context *msg_ctx,
493 struct server_id src, struct server_id dst,
495 const struct iovec *iov, int iovlen,
496 const int *fds, size_t num_fds)
499 struct messaging_hdr hdr;
500 struct iovec iov2[iovlen+1];
502 if (server_id_is_disconnected(&dst)) {
503 return NT_STATUS_INVALID_PARAMETER_MIX;
506 if (num_fds > INT8_MAX) {
507 return NT_STATUS_INVALID_PARAMETER_MIX;
510 if (!procid_is_local(&dst)) {
512 return NT_STATUS_NOT_SUPPORTED;
515 ret = msg_ctx->remote->send_fn(src, dst,
516 msg_type, iov, iovlen,
520 return map_nt_error_from_unix(ret);
526 hdr = (struct messaging_hdr) {
527 .msg_type = msg_type,
531 iov2[0] = (struct iovec){ .iov_base = &hdr, .iov_len = sizeof(hdr) };
532 memcpy(&iov2[1], iov, iovlen * sizeof(*iov));
535 ret = messaging_dgm_send(dst.pid, iov2, iovlen+1, fds, num_fds);
539 return map_nt_error_from_unix(ret);
544 NTSTATUS messaging_send_iov(struct messaging_context *msg_ctx,
545 struct server_id dst, uint32_t msg_type,
546 const struct iovec *iov, int iovlen,
547 const int *fds, size_t num_fds)
549 return messaging_send_iov_from(msg_ctx, msg_ctx->id, dst, msg_type,
550 iov, iovlen, fds, num_fds);
553 static struct messaging_rec *messaging_rec_dup(TALLOC_CTX *mem_ctx,
554 struct messaging_rec *rec)
556 struct messaging_rec *result;
557 size_t fds_size = sizeof(int64_t) * rec->num_fds;
559 result = talloc_pooled_object(mem_ctx, struct messaging_rec, 2,
560 rec->buf.length + fds_size);
561 if (result == NULL) {
566 /* Doesn't fail, see talloc_pooled_object */
568 result->buf.data = talloc_memdup(result, rec->buf.data,
572 if (result->num_fds > 0) {
573 result->fds = talloc_memdup(result, rec->fds, fds_size);
579 struct messaging_filtered_read_state {
580 struct tevent_context *ev;
581 struct messaging_context *msg_ctx;
584 bool (*filter)(struct messaging_rec *rec, void *private_data);
587 struct messaging_rec *rec;
590 static void messaging_filtered_read_cleanup(struct tevent_req *req,
591 enum tevent_req_state req_state);
593 struct tevent_req *messaging_filtered_read_send(
594 TALLOC_CTX *mem_ctx, struct tevent_context *ev,
595 struct messaging_context *msg_ctx,
596 bool (*filter)(struct messaging_rec *rec, void *private_data),
599 struct tevent_req *req;
600 struct messaging_filtered_read_state *state;
601 size_t new_waiters_len;
603 req = tevent_req_create(mem_ctx, &state,
604 struct messaging_filtered_read_state);
609 state->msg_ctx = msg_ctx;
610 state->filter = filter;
611 state->private_data = private_data;
614 * We have to defer the callback here, as we might be called from
615 * within a different tevent_context than state->ev
617 tevent_req_defer_callback(req, state->ev);
619 state->tevent_handle = messaging_dgm_register_tevent_context(
621 if (tevent_req_nomem(state, req)) {
622 return tevent_req_post(req, ev);
626 * We add ourselves to the "new_waiters" array, not the "waiters"
627 * array. If we are called from within messaging_read_done,
628 * messaging_dispatch_rec will be in an active for-loop on
629 * "waiters". We must be careful not to mess with this array, because
630 * it could mean that a single event is being delivered twice.
633 new_waiters_len = talloc_array_length(msg_ctx->new_waiters);
635 if (new_waiters_len == msg_ctx->num_new_waiters) {
636 struct tevent_req **tmp;
638 tmp = talloc_realloc(msg_ctx, msg_ctx->new_waiters,
639 struct tevent_req *, new_waiters_len+1);
640 if (tevent_req_nomem(tmp, req)) {
641 return tevent_req_post(req, ev);
643 msg_ctx->new_waiters = tmp;
646 msg_ctx->new_waiters[msg_ctx->num_new_waiters] = req;
647 msg_ctx->num_new_waiters += 1;
648 tevent_req_set_cleanup_fn(req, messaging_filtered_read_cleanup);
653 static void messaging_filtered_read_cleanup(struct tevent_req *req,
654 enum tevent_req_state req_state)
656 struct messaging_filtered_read_state *state = tevent_req_data(
657 req, struct messaging_filtered_read_state);
658 struct messaging_context *msg_ctx = state->msg_ctx;
661 tevent_req_set_cleanup_fn(req, NULL);
663 TALLOC_FREE(state->tevent_handle);
666 * Just set the [new_]waiters entry to NULL, be careful not to mess
667 * with the other "waiters" array contents. We are often called from
668 * within "messaging_dispatch_rec", which loops over
669 * "waiters". Messing with the "waiters" array will mess up that
673 for (i=0; i<msg_ctx->num_waiters; i++) {
674 if (msg_ctx->waiters[i] == req) {
675 msg_ctx->waiters[i] = NULL;
680 for (i=0; i<msg_ctx->num_new_waiters; i++) {
681 if (msg_ctx->new_waiters[i] == req) {
682 msg_ctx->new_waiters[i] = NULL;
688 static void messaging_filtered_read_done(struct tevent_req *req,
689 struct messaging_rec *rec)
691 struct messaging_filtered_read_state *state = tevent_req_data(
692 req, struct messaging_filtered_read_state);
694 state->rec = messaging_rec_dup(state, rec);
695 if (tevent_req_nomem(state->rec, req)) {
698 tevent_req_done(req);
701 int messaging_filtered_read_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
702 struct messaging_rec **presult)
704 struct messaging_filtered_read_state *state = tevent_req_data(
705 req, struct messaging_filtered_read_state);
708 if (tevent_req_is_unix_error(req, &err)) {
709 tevent_req_received(req);
712 *presult = talloc_move(mem_ctx, &state->rec);
716 struct messaging_read_state {
718 struct messaging_rec *rec;
721 static bool messaging_read_filter(struct messaging_rec *rec,
723 static void messaging_read_done(struct tevent_req *subreq);
725 struct tevent_req *messaging_read_send(TALLOC_CTX *mem_ctx,
726 struct tevent_context *ev,
727 struct messaging_context *msg,
730 struct tevent_req *req, *subreq;
731 struct messaging_read_state *state;
733 req = tevent_req_create(mem_ctx, &state,
734 struct messaging_read_state);
738 state->msg_type = msg_type;
740 subreq = messaging_filtered_read_send(state, ev, msg,
741 messaging_read_filter, state);
742 if (tevent_req_nomem(subreq, req)) {
743 return tevent_req_post(req, ev);
745 tevent_req_set_callback(subreq, messaging_read_done, req);
749 static bool messaging_read_filter(struct messaging_rec *rec,
752 struct messaging_read_state *state = talloc_get_type_abort(
753 private_data, struct messaging_read_state);
755 if (rec->num_fds != 0) {
759 return rec->msg_type == state->msg_type;
762 static void messaging_read_done(struct tevent_req *subreq)
764 struct tevent_req *req = tevent_req_callback_data(
765 subreq, struct tevent_req);
766 struct messaging_read_state *state = tevent_req_data(
767 req, struct messaging_read_state);
770 ret = messaging_filtered_read_recv(subreq, state, &state->rec);
772 if (tevent_req_error(req, ret)) {
775 tevent_req_done(req);
778 int messaging_read_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
779 struct messaging_rec **presult)
781 struct messaging_read_state *state = tevent_req_data(
782 req, struct messaging_read_state);
785 if (tevent_req_is_unix_error(req, &err)) {
788 if (presult != NULL) {
789 *presult = talloc_move(mem_ctx, &state->rec);
794 struct messaging_handler_state {
795 struct tevent_context *ev;
796 struct messaging_context *msg_ctx;
798 bool (*handler)(struct messaging_context *msg_ctx,
799 struct messaging_rec **rec, void *private_data);
803 static void messaging_handler_got_msg(struct tevent_req *subreq);
805 struct tevent_req *messaging_handler_send(
806 TALLOC_CTX *mem_ctx, struct tevent_context *ev,
807 struct messaging_context *msg_ctx, uint32_t msg_type,
808 bool (*handler)(struct messaging_context *msg_ctx,
809 struct messaging_rec **rec, void *private_data),
812 struct tevent_req *req, *subreq;
813 struct messaging_handler_state *state;
815 req = tevent_req_create(mem_ctx, &state,
816 struct messaging_handler_state);
821 state->msg_ctx = msg_ctx;
822 state->msg_type = msg_type;
823 state->handler = handler;
824 state->private_data = private_data;
826 subreq = messaging_read_send(state, state->ev, state->msg_ctx,
828 if (tevent_req_nomem(subreq, req)) {
829 return tevent_req_post(req, ev);
831 tevent_req_set_callback(subreq, messaging_handler_got_msg, req);
835 static void messaging_handler_got_msg(struct tevent_req *subreq)
837 struct tevent_req *req = tevent_req_callback_data(
838 subreq, struct tevent_req);
839 struct messaging_handler_state *state = tevent_req_data(
840 req, struct messaging_handler_state);
841 struct messaging_rec *rec;
845 ret = messaging_read_recv(subreq, state, &rec);
847 if (tevent_req_error(req, ret)) {
851 subreq = messaging_read_send(state, state->ev, state->msg_ctx,
853 if (tevent_req_nomem(subreq, req)) {
856 tevent_req_set_callback(subreq, messaging_handler_got_msg, req);
858 ok = state->handler(state->msg_ctx, &rec, state->private_data);
867 tevent_req_done(req);
870 int messaging_handler_recv(struct tevent_req *req)
872 return tevent_req_simple_recv_unix(req);
875 static bool messaging_append_new_waiters(struct messaging_context *msg_ctx)
877 if (msg_ctx->num_new_waiters == 0) {
881 if (talloc_array_length(msg_ctx->waiters) <
882 (msg_ctx->num_waiters + msg_ctx->num_new_waiters)) {
883 struct tevent_req **tmp;
884 tmp = talloc_realloc(
885 msg_ctx, msg_ctx->waiters, struct tevent_req *,
886 msg_ctx->num_waiters + msg_ctx->num_new_waiters);
888 DEBUG(1, ("%s: talloc failed\n", __func__));
891 msg_ctx->waiters = tmp;
894 memcpy(&msg_ctx->waiters[msg_ctx->num_waiters], msg_ctx->new_waiters,
895 sizeof(struct tevent_req *) * msg_ctx->num_new_waiters);
897 msg_ctx->num_waiters += msg_ctx->num_new_waiters;
898 msg_ctx->num_new_waiters = 0;
904 Dispatch one messaging_rec
906 void messaging_dispatch_rec(struct messaging_context *msg_ctx,
907 struct messaging_rec *rec)
909 struct messaging_callback *cb, *next;
913 for (cb = msg_ctx->callbacks; cb != NULL; cb = next) {
915 if (cb->msg_type != rec->msg_type) {
920 * the old style callbacks don't support fd passing
922 for (j=0; j < rec->num_fds; j++) {
923 int fd = rec->fds[j];
929 cb->fn(msg_ctx, cb->private_data, rec->msg_type,
930 rec->src, &rec->buf);
933 * we continue looking for matching messages after finding
934 * one. This matters for subsystems like the internal notify
935 * code which register more than one handler for the same
940 if (!messaging_append_new_waiters(msg_ctx)) {
941 for (j=0; j < rec->num_fds; j++) {
942 int fd = rec->fds[j];
951 while (i < msg_ctx->num_waiters) {
952 struct tevent_req *req;
953 struct messaging_filtered_read_state *state;
955 req = msg_ctx->waiters[i];
958 * This got cleaned up. In the meantime,
959 * move everything down one. We need
960 * to keep the order of waiters, as
961 * other code may depend on this.
963 if (i < msg_ctx->num_waiters - 1) {
964 memmove(&msg_ctx->waiters[i],
965 &msg_ctx->waiters[i+1],
966 sizeof(struct tevent_req *) *
967 (msg_ctx->num_waiters - i - 1));
969 msg_ctx->num_waiters -= 1;
973 state = tevent_req_data(
974 req, struct messaging_filtered_read_state);
975 if (state->filter(rec, state->private_data)) {
976 messaging_filtered_read_done(req, rec);
979 * Only the first one gets the fd-array
989 * If the fd-array isn't used, just close it.
991 for (j=0; j < rec->num_fds; j++) {
992 int fd = rec->fds[j];
999 static int mess_parent_dgm_cleanup(void *private_data);
1000 static void mess_parent_dgm_cleanup_done(struct tevent_req *req);
1002 bool messaging_parent_dgm_cleanup_init(struct messaging_context *msg)
1004 struct tevent_req *req;
1006 req = background_job_send(
1007 msg, msg->event_ctx, msg, NULL, 0,
1008 lp_parm_int(-1, "messaging", "messaging dgm cleanup interval",
1010 mess_parent_dgm_cleanup, msg);
1014 tevent_req_set_callback(req, mess_parent_dgm_cleanup_done, msg);
1018 static int mess_parent_dgm_cleanup(void *private_data)
1022 ret = messaging_dgm_wipe();
1023 DEBUG(10, ("messaging_dgm_wipe returned %s\n",
1024 ret ? strerror(ret) : "ok"));
1025 return lp_parm_int(-1, "messaging", "messaging dgm cleanup interval",
1029 static void mess_parent_dgm_cleanup_done(struct tevent_req *req)
1031 struct messaging_context *msg = tevent_req_callback_data(
1032 req, struct messaging_context);
1035 status = background_job_recv(req);
1037 DEBUG(1, ("messaging dgm cleanup job ended with %s\n",
1038 nt_errstr(status)));
1040 req = background_job_send(
1041 msg, msg->event_ctx, msg, NULL, 0,
1042 lp_parm_int(-1, "messaging", "messaging dgm cleanup interval",
1044 mess_parent_dgm_cleanup, msg);
1046 DEBUG(1, ("background_job_send failed\n"));
1048 tevent_req_set_callback(req, mess_parent_dgm_cleanup_done, msg);
1051 int messaging_cleanup(struct messaging_context *msg_ctx, pid_t pid)
1056 ret = messaging_dgm_wipe();
1058 ret = messaging_dgm_cleanup(pid);
1064 struct tevent_context *messaging_tevent_context(
1065 struct messaging_context *msg_ctx)
1067 return msg_ctx->event_ctx;
1070 struct server_id_db *messaging_names_db(struct messaging_context *msg_ctx)
1072 return msg_ctx->names_db;