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/util/iov_buf.h"
56 #include "lib/util/server_id_db.h"
57 #include "lib/messages_dgm_ref.h"
58 #include "lib/messages_util.h"
60 struct messaging_callback {
61 struct messaging_callback *prev, *next;
63 void (*fn)(struct messaging_context *msg, void *private_data,
65 struct server_id server_id, DATA_BLOB *data);
69 struct messaging_context {
71 struct tevent_context *event_ctx;
72 struct messaging_callback *callbacks;
74 struct tevent_req **new_waiters;
75 unsigned num_new_waiters;
77 struct tevent_req **waiters;
81 struct messaging_backend *remote;
83 struct server_id_db *names_db;
86 static void messaging_dispatch_rec(struct messaging_context *msg_ctx,
87 struct messaging_rec *rec);
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 struct server_id_buf idbuf;
217 struct messaging_rec rec;
218 int64_t fds64[MIN(num_fds, INT8_MAX)];
221 if (msg_len < MESSAGE_HDR_LENGTH) {
222 DEBUG(1, ("message too short: %u\n", (unsigned)msg_len));
226 if (num_fds > INT8_MAX) {
227 DEBUG(1, ("too many fds: %u\n", (unsigned)num_fds));
232 * "consume" the fds by copying them and setting
233 * the original variable to -1
235 for (i=0; i < num_fds; i++) {
240 rec = (struct messaging_rec) {
241 .msg_version = MESSAGE_VERSION,
242 .buf.data = discard_const_p(uint8_t, msg) + MESSAGE_HDR_LENGTH,
243 .buf.length = msg_len - MESSAGE_HDR_LENGTH,
248 message_hdr_get(&rec.msg_type, &rec.src, &rec.dest, msg);
250 DEBUG(10, ("%s: Received message 0x%x len %u (num_fds:%u) from %s\n",
251 __func__, (unsigned)rec.msg_type,
252 (unsigned)rec.buf.length,
254 server_id_str_buf(rec.src, &idbuf)));
256 messaging_dispatch_rec(msg_ctx, &rec);
260 for (i=0; i < num_fds; i++) {
265 static int messaging_context_destructor(struct messaging_context *ctx)
269 for (i=0; i<ctx->num_new_waiters; i++) {
270 if (ctx->new_waiters[i] != NULL) {
271 tevent_req_set_cleanup_fn(ctx->new_waiters[i], NULL);
272 ctx->new_waiters[i] = NULL;
275 for (i=0; i<ctx->num_waiters; i++) {
276 if (ctx->waiters[i] != NULL) {
277 tevent_req_set_cleanup_fn(ctx->waiters[i], NULL);
278 ctx->waiters[i] = NULL;
285 static const char *private_path(const char *name)
287 return talloc_asprintf(talloc_tos(), "%s/%s", lp_private_dir(), name);
290 struct messaging_context *messaging_init(TALLOC_CTX *mem_ctx,
291 struct tevent_context *ev)
293 struct messaging_context *ctx;
295 const char *lck_path;
296 const char *priv_path;
299 if (!(ctx = talloc_zero(mem_ctx, struct messaging_context))) {
303 ctx->id = procid_self();
308 lck_path = lock_path("msg.lock");
309 if (lck_path == NULL) {
314 ok = directory_create_or_exist_strict(lck_path, sec_initial_uid(),
317 DEBUG(10, ("%s: Could not create lock directory: %s\n",
318 __func__, strerror(errno)));
323 priv_path = private_path("msg.sock");
324 if (priv_path == NULL) {
329 ok = directory_create_or_exist_strict(priv_path, sec_initial_uid(),
332 DEBUG(10, ("%s: Could not create msg directory: %s\n",
333 __func__, strerror(errno)));
338 ctx->msg_dgm_ref = messaging_dgm_ref(
339 ctx, ctx->event_ctx, ctx->id.unique_id,
340 priv_path, lck_path, messaging_recv_cb, ctx, &ret);
342 if (ctx->msg_dgm_ref == NULL) {
343 DEBUG(2, ("messaging_dgm_ref failed: %s\n", strerror(ret)));
348 talloc_set_destructor(ctx, messaging_context_destructor);
350 if (lp_clustering()) {
351 ret = messaging_ctdbd_init(ctx, ctx, &ctx->remote);
354 DEBUG(2, ("messaging_ctdbd_init failed: %s\n",
360 ctx->id.vnn = get_my_vnn();
362 ctx->names_db = server_id_db_init(
363 ctx, ctx->id, lp_lock_directory(), 0,
364 TDB_INCOMPATIBLE_HASH|TDB_CLEAR_IF_FIRST);
365 if (ctx->names_db == NULL) {
366 DEBUG(10, ("%s: server_id_db_init failed\n", __func__));
371 messaging_register(ctx, NULL, MSG_PING, ping_message);
373 /* Register some debugging related messages */
375 register_msg_pool_usage(ctx);
376 register_dmalloc_msgs(ctx);
377 debug_register_msgs(ctx);
382 struct server_id messaging_server_id(const struct messaging_context *msg_ctx)
388 * re-init after a fork
390 NTSTATUS messaging_reinit(struct messaging_context *msg_ctx)
394 TALLOC_FREE(msg_ctx->msg_dgm_ref);
396 msg_ctx->id = procid_self();
398 msg_ctx->msg_dgm_ref = messaging_dgm_ref(
399 msg_ctx, msg_ctx->event_ctx, msg_ctx->id.unique_id,
400 private_path("msg.sock"), lock_path("msg.lock"),
401 messaging_recv_cb, msg_ctx, &ret);
403 if (msg_ctx->msg_dgm_ref == NULL) {
404 DEBUG(2, ("messaging_dgm_ref failed: %s\n", strerror(ret)));
405 return map_nt_error_from_unix(ret);
408 TALLOC_FREE(msg_ctx->remote);
410 if (lp_clustering()) {
411 ret = messaging_ctdbd_init(msg_ctx, msg_ctx,
415 DEBUG(1, ("messaging_ctdbd_init failed: %s\n",
417 return map_nt_error_from_unix(ret);
421 server_id_db_reinit(msg_ctx->names_db, msg_ctx->id);
428 * Register a dispatch function for a particular message type. Allow multiple
431 NTSTATUS messaging_register(struct messaging_context *msg_ctx,
434 void (*fn)(struct messaging_context *msg,
437 struct server_id server_id,
440 struct messaging_callback *cb;
442 DEBUG(5, ("Registering messaging pointer for type %u - "
444 (unsigned)msg_type, private_data));
447 * Only one callback per type
450 for (cb = msg_ctx->callbacks; cb != NULL; cb = cb->next) {
451 /* we allow a second registration of the same message
452 type if it has a different private pointer. This is
453 needed in, for example, the internal notify code,
454 which creates a new notify context for each tree
455 connect, and expects to receive messages to each of
457 if (cb->msg_type == msg_type && private_data == cb->private_data) {
458 DEBUG(5,("Overriding messaging pointer for type %u - private_data=%p\n",
459 (unsigned)msg_type, private_data));
461 cb->private_data = private_data;
466 if (!(cb = talloc(msg_ctx, struct messaging_callback))) {
467 return NT_STATUS_NO_MEMORY;
470 cb->msg_type = msg_type;
472 cb->private_data = private_data;
474 DLIST_ADD(msg_ctx->callbacks, cb);
479 De-register the function for a particular message type.
481 void messaging_deregister(struct messaging_context *ctx, uint32_t msg_type,
484 struct messaging_callback *cb, *next;
486 for (cb = ctx->callbacks; cb; cb = next) {
488 if ((cb->msg_type == msg_type)
489 && (cb->private_data == private_data)) {
490 DEBUG(5,("Deregistering messaging pointer for type %u - private_data=%p\n",
491 (unsigned)msg_type, private_data));
492 DLIST_REMOVE(ctx->callbacks, cb);
499 Send a message to a particular server
501 NTSTATUS messaging_send(struct messaging_context *msg_ctx,
502 struct server_id server, uint32_t msg_type,
503 const DATA_BLOB *data)
507 iov.iov_base = data->data;
508 iov.iov_len = data->length;
510 return messaging_send_iov(msg_ctx, server, msg_type, &iov, 1, NULL, 0);
513 NTSTATUS messaging_send_buf(struct messaging_context *msg_ctx,
514 struct server_id server, uint32_t msg_type,
515 const uint8_t *buf, size_t len)
517 DATA_BLOB blob = data_blob_const(buf, len);
518 return messaging_send(msg_ctx, server, msg_type, &blob);
521 int messaging_send_iov_from(struct messaging_context *msg_ctx,
522 struct server_id src, struct server_id dst,
524 const struct iovec *iov, int iovlen,
525 const int *fds, size_t num_fds)
528 uint8_t hdr[MESSAGE_HDR_LENGTH];
529 struct iovec iov2[iovlen+1];
531 if (server_id_is_disconnected(&dst)) {
535 if (num_fds > INT8_MAX) {
539 if (!procid_is_local(&dst)) {
544 ret = msg_ctx->remote->send_fn(src, dst,
545 msg_type, iov, iovlen,
551 message_hdr_put(hdr, msg_type, src, dst);
552 iov2[0] = (struct iovec){ .iov_base = hdr, .iov_len = sizeof(hdr) };
553 memcpy(&iov2[1], iov, iovlen * sizeof(*iov));
556 ret = messaging_dgm_send(dst.pid, iov2, iovlen+1, fds, num_fds);
562 NTSTATUS messaging_send_iov(struct messaging_context *msg_ctx,
563 struct server_id dst, uint32_t msg_type,
564 const struct iovec *iov, int iovlen,
565 const int *fds, size_t num_fds)
569 ret = messaging_send_iov_from(msg_ctx, msg_ctx->id, dst, msg_type,
570 iov, iovlen, fds, num_fds);
572 return map_nt_error_from_unix(ret);
577 static struct messaging_rec *messaging_rec_dup(TALLOC_CTX *mem_ctx,
578 struct messaging_rec *rec)
580 struct messaging_rec *result;
581 size_t fds_size = sizeof(int64_t) * rec->num_fds;
583 result = talloc_pooled_object(mem_ctx, struct messaging_rec, 2,
584 rec->buf.length + fds_size);
585 if (result == NULL) {
590 /* Doesn't fail, see talloc_pooled_object */
592 result->buf.data = talloc_memdup(result, rec->buf.data,
596 if (result->num_fds > 0) {
597 result->fds = talloc_memdup(result, rec->fds, fds_size);
603 struct messaging_filtered_read_state {
604 struct tevent_context *ev;
605 struct messaging_context *msg_ctx;
608 bool (*filter)(struct messaging_rec *rec, void *private_data);
611 struct messaging_rec *rec;
614 static void messaging_filtered_read_cleanup(struct tevent_req *req,
615 enum tevent_req_state req_state);
617 struct tevent_req *messaging_filtered_read_send(
618 TALLOC_CTX *mem_ctx, struct tevent_context *ev,
619 struct messaging_context *msg_ctx,
620 bool (*filter)(struct messaging_rec *rec, void *private_data),
623 struct tevent_req *req;
624 struct messaging_filtered_read_state *state;
625 size_t new_waiters_len;
627 req = tevent_req_create(mem_ctx, &state,
628 struct messaging_filtered_read_state);
633 state->msg_ctx = msg_ctx;
634 state->filter = filter;
635 state->private_data = private_data;
638 * We have to defer the callback here, as we might be called from
639 * within a different tevent_context than state->ev
641 tevent_req_defer_callback(req, state->ev);
643 state->tevent_handle = messaging_dgm_register_tevent_context(
645 if (tevent_req_nomem(state->tevent_handle, req)) {
646 return tevent_req_post(req, ev);
650 * We add ourselves to the "new_waiters" array, not the "waiters"
651 * array. If we are called from within messaging_read_done,
652 * messaging_dispatch_rec will be in an active for-loop on
653 * "waiters". We must be careful not to mess with this array, because
654 * it could mean that a single event is being delivered twice.
657 new_waiters_len = talloc_array_length(msg_ctx->new_waiters);
659 if (new_waiters_len == msg_ctx->num_new_waiters) {
660 struct tevent_req **tmp;
662 tmp = talloc_realloc(msg_ctx, msg_ctx->new_waiters,
663 struct tevent_req *, new_waiters_len+1);
664 if (tevent_req_nomem(tmp, req)) {
665 return tevent_req_post(req, ev);
667 msg_ctx->new_waiters = tmp;
670 msg_ctx->new_waiters[msg_ctx->num_new_waiters] = req;
671 msg_ctx->num_new_waiters += 1;
672 tevent_req_set_cleanup_fn(req, messaging_filtered_read_cleanup);
677 static void messaging_filtered_read_cleanup(struct tevent_req *req,
678 enum tevent_req_state req_state)
680 struct messaging_filtered_read_state *state = tevent_req_data(
681 req, struct messaging_filtered_read_state);
682 struct messaging_context *msg_ctx = state->msg_ctx;
685 tevent_req_set_cleanup_fn(req, NULL);
687 TALLOC_FREE(state->tevent_handle);
690 * Just set the [new_]waiters entry to NULL, be careful not to mess
691 * with the other "waiters" array contents. We are often called from
692 * within "messaging_dispatch_rec", which loops over
693 * "waiters". Messing with the "waiters" array will mess up that
697 for (i=0; i<msg_ctx->num_waiters; i++) {
698 if (msg_ctx->waiters[i] == req) {
699 msg_ctx->waiters[i] = NULL;
704 for (i=0; i<msg_ctx->num_new_waiters; i++) {
705 if (msg_ctx->new_waiters[i] == req) {
706 msg_ctx->new_waiters[i] = NULL;
712 static void messaging_filtered_read_done(struct tevent_req *req,
713 struct messaging_rec *rec)
715 struct messaging_filtered_read_state *state = tevent_req_data(
716 req, struct messaging_filtered_read_state);
718 state->rec = messaging_rec_dup(state, rec);
719 if (tevent_req_nomem(state->rec, req)) {
722 tevent_req_done(req);
725 int messaging_filtered_read_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
726 struct messaging_rec **presult)
728 struct messaging_filtered_read_state *state = tevent_req_data(
729 req, struct messaging_filtered_read_state);
732 if (tevent_req_is_unix_error(req, &err)) {
733 tevent_req_received(req);
736 *presult = talloc_move(mem_ctx, &state->rec);
740 struct messaging_read_state {
742 struct messaging_rec *rec;
745 static bool messaging_read_filter(struct messaging_rec *rec,
747 static void messaging_read_done(struct tevent_req *subreq);
749 struct tevent_req *messaging_read_send(TALLOC_CTX *mem_ctx,
750 struct tevent_context *ev,
751 struct messaging_context *msg,
754 struct tevent_req *req, *subreq;
755 struct messaging_read_state *state;
757 req = tevent_req_create(mem_ctx, &state,
758 struct messaging_read_state);
762 state->msg_type = msg_type;
764 subreq = messaging_filtered_read_send(state, ev, msg,
765 messaging_read_filter, state);
766 if (tevent_req_nomem(subreq, req)) {
767 return tevent_req_post(req, ev);
769 tevent_req_set_callback(subreq, messaging_read_done, req);
773 static bool messaging_read_filter(struct messaging_rec *rec,
776 struct messaging_read_state *state = talloc_get_type_abort(
777 private_data, struct messaging_read_state);
779 if (rec->num_fds != 0) {
783 return rec->msg_type == state->msg_type;
786 static void messaging_read_done(struct tevent_req *subreq)
788 struct tevent_req *req = tevent_req_callback_data(
789 subreq, struct tevent_req);
790 struct messaging_read_state *state = tevent_req_data(
791 req, struct messaging_read_state);
794 ret = messaging_filtered_read_recv(subreq, state, &state->rec);
796 if (tevent_req_error(req, ret)) {
799 tevent_req_done(req);
802 int messaging_read_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
803 struct messaging_rec **presult)
805 struct messaging_read_state *state = tevent_req_data(
806 req, struct messaging_read_state);
809 if (tevent_req_is_unix_error(req, &err)) {
812 if (presult != NULL) {
813 *presult = talloc_move(mem_ctx, &state->rec);
818 struct messaging_handler_state {
819 struct tevent_context *ev;
820 struct messaging_context *msg_ctx;
822 bool (*handler)(struct messaging_context *msg_ctx,
823 struct messaging_rec **rec, void *private_data);
827 static void messaging_handler_got_msg(struct tevent_req *subreq);
829 struct tevent_req *messaging_handler_send(
830 TALLOC_CTX *mem_ctx, struct tevent_context *ev,
831 struct messaging_context *msg_ctx, uint32_t msg_type,
832 bool (*handler)(struct messaging_context *msg_ctx,
833 struct messaging_rec **rec, void *private_data),
836 struct tevent_req *req, *subreq;
837 struct messaging_handler_state *state;
839 req = tevent_req_create(mem_ctx, &state,
840 struct messaging_handler_state);
845 state->msg_ctx = msg_ctx;
846 state->msg_type = msg_type;
847 state->handler = handler;
848 state->private_data = private_data;
850 subreq = messaging_read_send(state, state->ev, state->msg_ctx,
852 if (tevent_req_nomem(subreq, req)) {
853 return tevent_req_post(req, ev);
855 tevent_req_set_callback(subreq, messaging_handler_got_msg, req);
859 static void messaging_handler_got_msg(struct tevent_req *subreq)
861 struct tevent_req *req = tevent_req_callback_data(
862 subreq, struct tevent_req);
863 struct messaging_handler_state *state = tevent_req_data(
864 req, struct messaging_handler_state);
865 struct messaging_rec *rec;
869 ret = messaging_read_recv(subreq, state, &rec);
871 if (tevent_req_error(req, ret)) {
875 subreq = messaging_read_send(state, state->ev, state->msg_ctx,
877 if (tevent_req_nomem(subreq, req)) {
880 tevent_req_set_callback(subreq, messaging_handler_got_msg, req);
882 ok = state->handler(state->msg_ctx, &rec, state->private_data);
891 tevent_req_done(req);
894 int messaging_handler_recv(struct tevent_req *req)
896 return tevent_req_simple_recv_unix(req);
899 static bool messaging_append_new_waiters(struct messaging_context *msg_ctx)
901 if (msg_ctx->num_new_waiters == 0) {
905 if (talloc_array_length(msg_ctx->waiters) <
906 (msg_ctx->num_waiters + msg_ctx->num_new_waiters)) {
907 struct tevent_req **tmp;
908 tmp = talloc_realloc(
909 msg_ctx, msg_ctx->waiters, struct tevent_req *,
910 msg_ctx->num_waiters + msg_ctx->num_new_waiters);
912 DEBUG(1, ("%s: talloc failed\n", __func__));
915 msg_ctx->waiters = tmp;
918 memcpy(&msg_ctx->waiters[msg_ctx->num_waiters], msg_ctx->new_waiters,
919 sizeof(struct tevent_req *) * msg_ctx->num_new_waiters);
921 msg_ctx->num_waiters += msg_ctx->num_new_waiters;
922 msg_ctx->num_new_waiters = 0;
928 Dispatch one messaging_rec
930 static void messaging_dispatch_rec(struct messaging_context *msg_ctx,
931 struct messaging_rec *rec)
933 struct messaging_callback *cb, *next;
937 for (cb = msg_ctx->callbacks; cb != NULL; cb = next) {
939 if (cb->msg_type != rec->msg_type) {
944 * the old style callbacks don't support fd passing
946 for (j=0; j < rec->num_fds; j++) {
947 int fd = rec->fds[j];
953 cb->fn(msg_ctx, cb->private_data, rec->msg_type,
954 rec->src, &rec->buf);
957 * we continue looking for matching messages after finding
958 * one. This matters for subsystems like the internal notify
959 * code which register more than one handler for the same
964 if (!messaging_append_new_waiters(msg_ctx)) {
965 for (j=0; j < rec->num_fds; j++) {
966 int fd = rec->fds[j];
975 while (i < msg_ctx->num_waiters) {
976 struct tevent_req *req;
977 struct messaging_filtered_read_state *state;
979 req = msg_ctx->waiters[i];
982 * This got cleaned up. In the meantime,
983 * move everything down one. We need
984 * to keep the order of waiters, as
985 * other code may depend on this.
987 if (i < msg_ctx->num_waiters - 1) {
988 memmove(&msg_ctx->waiters[i],
989 &msg_ctx->waiters[i+1],
990 sizeof(struct tevent_req *) *
991 (msg_ctx->num_waiters - i - 1));
993 msg_ctx->num_waiters -= 1;
997 state = tevent_req_data(
998 req, struct messaging_filtered_read_state);
999 if (state->filter(rec, state->private_data)) {
1000 messaging_filtered_read_done(req, rec);
1003 * Only the first one gets the fd-array
1013 * If the fd-array isn't used, just close it.
1015 for (j=0; j < rec->num_fds; j++) {
1016 int fd = rec->fds[j];
1023 static int mess_parent_dgm_cleanup(void *private_data);
1024 static void mess_parent_dgm_cleanup_done(struct tevent_req *req);
1026 bool messaging_parent_dgm_cleanup_init(struct messaging_context *msg)
1028 struct tevent_req *req;
1030 req = background_job_send(
1031 msg, msg->event_ctx, msg, NULL, 0,
1032 lp_parm_int(-1, "messaging", "messaging dgm cleanup interval",
1034 mess_parent_dgm_cleanup, msg);
1038 tevent_req_set_callback(req, mess_parent_dgm_cleanup_done, msg);
1042 static int mess_parent_dgm_cleanup(void *private_data)
1046 ret = messaging_dgm_wipe();
1047 DEBUG(10, ("messaging_dgm_wipe returned %s\n",
1048 ret ? strerror(ret) : "ok"));
1049 return lp_parm_int(-1, "messaging", "messaging dgm cleanup interval",
1053 static void mess_parent_dgm_cleanup_done(struct tevent_req *req)
1055 struct messaging_context *msg = tevent_req_callback_data(
1056 req, struct messaging_context);
1059 status = background_job_recv(req);
1061 DEBUG(1, ("messaging dgm cleanup job ended with %s\n",
1062 nt_errstr(status)));
1064 req = background_job_send(
1065 msg, msg->event_ctx, msg, NULL, 0,
1066 lp_parm_int(-1, "messaging", "messaging dgm cleanup interval",
1068 mess_parent_dgm_cleanup, msg);
1070 DEBUG(1, ("background_job_send failed\n"));
1073 tevent_req_set_callback(req, mess_parent_dgm_cleanup_done, msg);
1076 int messaging_cleanup(struct messaging_context *msg_ctx, pid_t pid)
1081 ret = messaging_dgm_wipe();
1083 ret = messaging_dgm_cleanup(pid);
1089 struct tevent_context *messaging_tevent_context(
1090 struct messaging_context *msg_ctx)
1092 return msg_ctx->event_ctx;
1095 struct server_id_db *messaging_names_db(struct messaging_context *msg_ctx)
1097 return msg_ctx->names_db;