2 * Unix SMB/CIFS implementation.
4 * Copyright (C) Volker Lendecke 2014
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 3 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
21 #include "librpc/gen_ndr/notify.h"
22 #include "librpc/gen_ndr/messaging.h"
23 #include "librpc/gen_ndr/server_id.h"
24 #include "lib/dbwrap/dbwrap.h"
25 #include "lib/dbwrap/dbwrap_rbt.h"
31 #include "lib/util/server_id_db.h"
32 #include "lib/util/tevent_unix.h"
33 #include "ctdbd_conn.h"
34 #include "ctdb_srvids.h"
35 #include "source3/smbd/proto.h"
36 #include "server_id_db_util.h"
37 #include "lib/util/iov_buf.h"
38 #include "messages_util.h"
40 #ifdef CLUSTER_SUPPORT
41 #include "ctdb_protocol.h"
47 * All of notifyd's state
50 struct notifyd_state {
51 struct tevent_context *ev;
52 struct messaging_context *msg_ctx;
53 struct ctdbd_connection *ctdbd_conn;
56 * Database of everything clients show interest in. Indexed by
57 * absolute path. The database keys are not 0-terminated
58 * because the criticial operation, notifyd_trigger, can walk
59 * the structure from the top without adding intermediate 0s.
60 * The database records contain an array of
62 * struct notifyd_instance
64 * to be maintained by parsed by notifyd_entry_parse()
66 struct db_context *entries;
69 * In the cluster case, this is the place where we store a log
70 * of all MSG_SMB_NOTIFY_REC_CHANGE messages. We just 1:1
71 * forward them to our peer notifyd's in the cluster once a
72 * second or when the log grows too large.
75 struct messaging_reclog *log;
78 * Array of companion notifyd's in a cluster. Every notifyd
79 * broadcasts its messaging_reclog to every other notifyd in
80 * the cluster. This is done by making ctdb send a message to
81 * srvid CTDB_SRVID_SAMBA_NOTIFY_PROXY with destination node
82 * number CTDB_BROADCAST_VNNMAP. Everybody in the cluster who
83 * had called register_with_ctdbd this srvid will receive the
86 * Database replication happens via these broadcasts. Also,
87 * they serve as liveness indication. If a notifyd receives a
88 * broadcast from an unknown peer, it will create one for this
89 * srvid. Also when we don't hear anything from a peer for a
90 * while, we will discard it.
93 struct notifyd_peer **peers;
96 sys_notify_watch_fn sys_notify_watch;
97 struct sys_notify_context *sys_notify_ctx;
101 * notifyd's representation of a notify instance
103 struct notifyd_instance {
104 struct server_id client;
105 struct notify_instance instance;
107 void *sys_watch; /* inotify/fam/etc handle */
110 * Filters after sys_watch took responsibility of some bits
112 uint32_t internal_filter;
113 uint32_t internal_subdir_filter;
116 struct notifyd_peer {
117 struct notifyd_state *state;
118 struct server_id pid;
120 struct db_context *db;
121 time_t last_broadcast;
124 static bool notifyd_rec_change(struct messaging_context *msg_ctx,
125 struct messaging_rec **prec,
127 static bool notifyd_trigger(struct messaging_context *msg_ctx,
128 struct messaging_rec **prec,
130 static bool notifyd_get_db(struct messaging_context *msg_ctx,
131 struct messaging_rec **prec,
133 static bool notifyd_got_db(struct messaging_context *msg_ctx,
134 struct messaging_rec **prec,
137 #ifdef CLUSTER_SUPPORT
138 static void notifyd_broadcast_reclog(struct ctdbd_connection *ctdbd_conn,
139 struct server_id src,
140 struct messaging_reclog *log);
142 static void notifyd_sys_callback(struct sys_notify_context *ctx,
143 void *private_data, struct notify_event *ev,
146 #ifdef CLUSTER_SUPPORT
147 static struct tevent_req *notifyd_broadcast_reclog_send(
148 TALLOC_CTX *mem_ctx, struct tevent_context *ev,
149 struct ctdbd_connection *ctdbd_conn, struct server_id src,
150 struct messaging_reclog *log);
151 static int notifyd_broadcast_reclog_recv(struct tevent_req *req);
153 static struct tevent_req *notifyd_clean_peers_send(
154 TALLOC_CTX *mem_ctx, struct tevent_context *ev,
155 struct notifyd_state *notifyd);
156 static int notifyd_clean_peers_recv(struct tevent_req *req);
159 static int sys_notify_watch_dummy(
161 struct sys_notify_context *ctx,
164 uint32_t *subdir_filter,
165 void (*callback)(struct sys_notify_context *ctx,
167 struct notify_event *ev,
172 void **handle = handle_p;
177 static void notifyd_handler_done(struct tevent_req *subreq);
179 #ifdef CLUSTER_SUPPORT
180 static void notifyd_broadcast_reclog_finished(struct tevent_req *subreq);
181 static void notifyd_clean_peers_finished(struct tevent_req *subreq);
182 static int notifyd_snoop_broadcast(uint32_t src_vnn, uint32_t dst_vnn,
184 const uint8_t *msg, size_t msglen,
188 struct tevent_req *notifyd_send(TALLOC_CTX *mem_ctx, struct tevent_context *ev,
189 struct messaging_context *msg_ctx,
190 struct ctdbd_connection *ctdbd_conn,
191 sys_notify_watch_fn sys_notify_watch,
192 struct sys_notify_context *sys_notify_ctx)
194 struct tevent_req *req, *subreq;
195 struct notifyd_state *state;
196 struct server_id_db *names_db;
199 req = tevent_req_create(mem_ctx, &state, struct notifyd_state);
204 state->msg_ctx = msg_ctx;
205 state->ctdbd_conn = ctdbd_conn;
207 if (sys_notify_watch == NULL) {
208 sys_notify_watch = sys_notify_watch_dummy;
211 state->sys_notify_watch = sys_notify_watch;
212 state->sys_notify_ctx = sys_notify_ctx;
214 state->entries = db_open_rbt(state);
215 if (tevent_req_nomem(state->entries, req)) {
216 return tevent_req_post(req, ev);
219 subreq = messaging_handler_send(state, ev, msg_ctx,
220 MSG_SMB_NOTIFY_REC_CHANGE,
221 notifyd_rec_change, state);
222 if (tevent_req_nomem(subreq, req)) {
223 return tevent_req_post(req, ev);
225 tevent_req_set_callback(subreq, notifyd_handler_done, req);
227 subreq = messaging_handler_send(state, ev, msg_ctx,
228 MSG_SMB_NOTIFY_TRIGGER,
229 notifyd_trigger, state);
230 if (tevent_req_nomem(subreq, req)) {
231 return tevent_req_post(req, ev);
233 tevent_req_set_callback(subreq, notifyd_handler_done, req);
235 subreq = messaging_handler_send(state, ev, msg_ctx,
236 MSG_SMB_NOTIFY_GET_DB,
237 notifyd_get_db, state);
238 if (tevent_req_nomem(subreq, req)) {
239 return tevent_req_post(req, ev);
241 tevent_req_set_callback(subreq, notifyd_handler_done, req);
243 subreq = messaging_handler_send(state, ev, msg_ctx,
245 notifyd_got_db, state);
246 if (tevent_req_nomem(subreq, req)) {
247 return tevent_req_post(req, ev);
249 tevent_req_set_callback(subreq, notifyd_handler_done, req);
251 names_db = messaging_names_db(msg_ctx);
253 ret = server_id_db_set_exclusive(names_db, "notify-daemon");
255 DEBUG(10, ("%s: server_id_db_add failed: %s\n",
256 __func__, strerror(ret)));
257 tevent_req_error(req, ret);
258 return tevent_req_post(req, ev);
261 if (ctdbd_conn == NULL) {
263 * No cluster around, skip the database replication
269 #ifdef CLUSTER_SUPPORT
270 state->log = talloc_zero(state, struct messaging_reclog);
271 if (tevent_req_nomem(state->log, req)) {
272 return tevent_req_post(req, ev);
275 subreq = notifyd_broadcast_reclog_send(
276 state->log, ev, ctdbd_conn, messaging_server_id(msg_ctx),
278 if (tevent_req_nomem(subreq, req)) {
279 return tevent_req_post(req, ev);
281 tevent_req_set_callback(subreq, notifyd_broadcast_reclog_finished,
284 subreq = notifyd_clean_peers_send(state, ev, state);
285 if (tevent_req_nomem(subreq, req)) {
286 return tevent_req_post(req, ev);
288 tevent_req_set_callback(subreq, notifyd_clean_peers_finished,
291 ret = register_with_ctdbd(ctdbd_conn, CTDB_SRVID_SAMBA_NOTIFY_PROXY,
292 notifyd_snoop_broadcast, state);
294 tevent_req_error(req, ret);
295 return tevent_req_post(req, ev);
302 static void notifyd_handler_done(struct tevent_req *subreq)
304 struct tevent_req *req = tevent_req_callback_data(
305 subreq, struct tevent_req);
308 ret = messaging_handler_recv(subreq);
310 tevent_req_error(req, ret);
313 #ifdef CLUSTER_SUPPORT
315 static void notifyd_broadcast_reclog_finished(struct tevent_req *subreq)
317 struct tevent_req *req = tevent_req_callback_data(
318 subreq, struct tevent_req);
321 ret = notifyd_broadcast_reclog_recv(subreq);
323 tevent_req_error(req, ret);
326 static void notifyd_clean_peers_finished(struct tevent_req *subreq)
328 struct tevent_req *req = tevent_req_callback_data(
329 subreq, struct tevent_req);
332 ret = notifyd_clean_peers_recv(subreq);
334 tevent_req_error(req, ret);
339 int notifyd_recv(struct tevent_req *req)
341 return tevent_req_simple_recv_unix(req);
345 * Parse an entry in the notifyd_context->entries database
348 static bool notifyd_parse_entry(uint8_t *buf, size_t buflen,
349 struct notifyd_instance **instances,
350 size_t *num_instances)
352 if ((buflen % sizeof(struct notifyd_instance)) != 0) {
353 DEBUG(1, ("%s: invalid buffer size: %u\n",
354 __func__, (unsigned)buflen));
358 if (instances != NULL) {
359 *instances = (struct notifyd_instance *)buf;
361 if (num_instances != NULL) {
362 *num_instances = buflen / sizeof(struct notifyd_instance);
367 static bool notifyd_apply_rec_change(
368 const struct server_id *client,
369 const char *path, size_t pathlen,
370 const struct notify_instance *chg,
371 struct db_context *entries,
372 sys_notify_watch_fn sys_notify_watch,
373 struct sys_notify_context *sys_notify_ctx,
374 struct messaging_context *msg_ctx)
376 struct db_record *rec;
377 struct notifyd_instance *instances;
378 size_t num_instances;
380 struct notifyd_instance *instance;
386 DEBUG(1, ("%s: pathlen==0\n", __func__));
389 if (path[pathlen-1] != '\0') {
390 DEBUG(1, ("%s: path not 0-terminated\n", __func__));
394 DEBUG(10, ("%s: path=%s, filter=%u, subdir_filter=%u, "
395 "private_data=%p\n", __func__, path,
396 (unsigned)chg->filter, (unsigned)chg->subdir_filter,
399 rec = dbwrap_fetch_locked(
401 make_tdb_data((const uint8_t *)path, pathlen-1));
404 DEBUG(1, ("%s: dbwrap_fetch_locked failed\n", __func__));
409 value = dbwrap_record_get_value(rec);
411 if (value.dsize != 0) {
412 if (!notifyd_parse_entry(value.dptr, value.dsize, NULL,
419 * Overallocate by one instance to avoid a realloc when adding
421 instances = talloc_array(rec, struct notifyd_instance,
423 if (instances == NULL) {
424 DEBUG(1, ("%s: talloc failed\n", __func__));
428 if (value.dsize != 0) {
429 memcpy(instances, value.dptr, value.dsize);
432 for (i=0; i<num_instances; i++) {
433 instance = &instances[i];
435 if (server_id_equal(&instance->client, client) &&
436 (instance->instance.private_data == chg->private_data)) {
441 if (i < num_instances) {
442 instance->instance = *chg;
445 * We've overallocated for one instance
447 instance = &instances[num_instances];
449 *instance = (struct notifyd_instance) {
452 .internal_filter = chg->filter,
453 .internal_subdir_filter = chg->subdir_filter
459 if ((instance->instance.filter != 0) ||
460 (instance->instance.subdir_filter != 0)) {
463 TALLOC_FREE(instance->sys_watch);
465 ret = sys_notify_watch(entries, sys_notify_ctx, path,
466 &instance->internal_filter,
467 &instance->internal_subdir_filter,
468 notifyd_sys_callback, msg_ctx,
469 &instance->sys_watch);
471 DEBUG(1, ("%s: inotify_watch returned %s\n",
472 __func__, strerror(errno)));
476 if ((instance->instance.filter == 0) &&
477 (instance->instance.subdir_filter == 0)) {
478 /* This is a delete request */
479 TALLOC_FREE(instance->sys_watch);
480 *instance = instances[num_instances-1];
484 DEBUG(10, ("%s: %s has %u instances\n", __func__,
485 path, (unsigned)num_instances));
487 if (num_instances == 0) {
488 status = dbwrap_record_delete(rec);
489 if (!NT_STATUS_IS_OK(status)) {
490 DEBUG(1, ("%s: dbwrap_record_delete returned %s\n",
491 __func__, nt_errstr(status)));
495 value = make_tdb_data(
496 (uint8_t *)instances,
497 sizeof(struct notifyd_instance) * num_instances);
499 status = dbwrap_record_store(rec, value, 0);
500 if (!NT_STATUS_IS_OK(status)) {
501 DEBUG(1, ("%s: dbwrap_record_store returned %s\n",
502 __func__, nt_errstr(status)));
513 static void notifyd_sys_callback(struct sys_notify_context *ctx,
514 void *private_data, struct notify_event *ev,
517 struct messaging_context *msg_ctx = talloc_get_type_abort(
518 private_data, struct messaging_context);
519 struct notify_trigger_msg msg;
523 msg = (struct notify_trigger_msg) {
524 .when = timespec_current(),
525 .action = ev->action,
529 iov[0].iov_base = &msg;
530 iov[0].iov_len = offsetof(struct notify_trigger_msg, path);
531 iov[1].iov_base = discard_const_p(char, ev->dir);
532 iov[1].iov_len = strlen(ev->dir);
533 iov[2].iov_base = &slash;
535 iov[3].iov_base = discard_const_p(char, ev->path);
536 iov[3].iov_len = strlen(ev->path)+1;
539 msg_ctx, messaging_server_id(msg_ctx),
540 MSG_SMB_NOTIFY_TRIGGER, iov, ARRAY_SIZE(iov), NULL, 0);
543 static bool notifyd_parse_rec_change(uint8_t *buf, size_t bufsize,
544 struct notify_rec_change_msg **pmsg,
547 struct notify_rec_change_msg *msg;
549 if (bufsize < offsetof(struct notify_rec_change_msg, path) + 1) {
550 DEBUG(1, ("%s: message too short, ignoring: %u\n", __func__,
555 *pmsg = msg = (struct notify_rec_change_msg *)buf;
556 *pathlen = bufsize - offsetof(struct notify_rec_change_msg, path);
558 DEBUG(10, ("%s: Got rec_change_msg filter=%u, subdir_filter=%u, "
559 "private_data=%p, path=%.*s\n",
560 __func__, (unsigned)msg->instance.filter,
561 (unsigned)msg->instance.subdir_filter,
562 msg->instance.private_data, (int)(*pathlen), msg->path));
567 static bool notifyd_rec_change(struct messaging_context *msg_ctx,
568 struct messaging_rec **prec,
571 struct notifyd_state *state = talloc_get_type_abort(
572 private_data, struct notifyd_state);
573 struct server_id_buf idbuf;
574 struct messaging_rec *rec = *prec;
575 struct notify_rec_change_msg *msg;
579 DEBUG(10, ("%s: Got %d bytes from %s\n", __func__,
580 (unsigned)rec->buf.length,
581 server_id_str_buf(rec->src, &idbuf)));
583 ok = notifyd_parse_rec_change(rec->buf.data, rec->buf.length,
589 ok = notifyd_apply_rec_change(
590 &rec->src, msg->path, pathlen, &msg->instance,
591 state->entries, state->sys_notify_watch, state->sys_notify_ctx,
594 DEBUG(1, ("%s: notifyd_apply_rec_change failed, ignoring\n",
599 if ((state->log == NULL) || (state->ctdbd_conn == NULL)) {
603 #ifdef CLUSTER_SUPPORT
606 struct messaging_rec **tmp;
607 struct messaging_reclog *log;
611 tmp = talloc_realloc(log, log->recs, struct messaging_rec *,
614 DEBUG(1, ("%s: talloc_realloc failed, ignoring\n", __func__));
619 log->recs[log->num_recs] = talloc_move(log->recs, prec);
622 if (log->num_recs >= 100) {
624 * Don't let the log grow too large
626 notifyd_broadcast_reclog(state->ctdbd_conn,
627 messaging_server_id(msg_ctx), log);
636 struct notifyd_trigger_state {
637 struct messaging_context *msg_ctx;
638 struct notify_trigger_msg *msg;
640 bool covered_by_sys_notify;
643 static void notifyd_trigger_parser(TDB_DATA key, TDB_DATA data,
646 static bool notifyd_trigger(struct messaging_context *msg_ctx,
647 struct messaging_rec **prec,
650 struct notifyd_state *state = talloc_get_type_abort(
651 private_data, struct notifyd_state);
652 struct server_id my_id = messaging_server_id(msg_ctx);
653 struct messaging_rec *rec = *prec;
654 struct notifyd_trigger_state tstate;
656 const char *p, *next_p;
658 if (rec->buf.length < offsetof(struct notify_trigger_msg, path) + 1) {
659 DEBUG(1, ("message too short, ignoring: %u\n",
660 (unsigned)rec->buf.length));
663 if (rec->buf.data[rec->buf.length-1] != 0) {
664 DEBUG(1, ("%s: path not 0-terminated, ignoring\n", __func__));
668 tstate.msg_ctx = msg_ctx;
670 tstate.covered_by_sys_notify = (rec->src.vnn == my_id.vnn);
671 tstate.covered_by_sys_notify &= !server_id_equal(&rec->src, &my_id);
673 tstate.msg = (struct notify_trigger_msg *)rec->buf.data;
674 path = tstate.msg->path;
676 DEBUG(10, ("%s: Got trigger_msg action=%u, filter=%u, path=%s\n",
677 __func__, (unsigned)tstate.msg->action,
678 (unsigned)tstate.msg->filter, path));
680 if (path[0] != '/') {
681 DEBUG(1, ("%s: path %s does not start with /, ignoring\n",
686 for (p = strchr(path+1, '/'); p != NULL; p = next_p) {
687 ptrdiff_t path_len = p - path;
691 next_p = strchr(p+1, '/');
692 tstate.recursive = (next_p != NULL);
694 DEBUG(10, ("%s: Trying path %.*s\n", __func__,
695 (int)path_len, path));
697 key = (TDB_DATA) { .dptr = discard_const_p(uint8_t, path),
700 dbwrap_parse_record(state->entries, key,
701 notifyd_trigger_parser, &tstate);
703 if (state->peers == NULL) {
707 if (rec->src.vnn != my_id.vnn) {
711 for (i=0; i<state->num_peers; i++) {
712 if (state->peers[i]->db == NULL) {
714 * Inactive peer, did not get a db yet
718 dbwrap_parse_record(state->peers[i]->db, key,
719 notifyd_trigger_parser, &tstate);
726 static void notifyd_send_delete(struct messaging_context *msg_ctx,
728 struct notifyd_instance *instance);
730 static void notifyd_trigger_parser(TDB_DATA key, TDB_DATA data,
734 struct notifyd_trigger_state *tstate = private_data;
735 struct notify_event_msg msg = { .action = tstate->msg->action };
737 size_t path_len = key.dsize;
738 struct notifyd_instance *instances = NULL;
739 size_t num_instances = 0;
742 if (!notifyd_parse_entry(data.dptr, data.dsize, &instances,
744 DEBUG(1, ("%s: Could not parse notifyd_entry\n", __func__));
748 DEBUG(10, ("%s: Found %u instances for %.*s\n", __func__,
749 (unsigned)num_instances, (int)key.dsize,
752 iov[0].iov_base = &msg;
753 iov[0].iov_len = offsetof(struct notify_event_msg, path);
754 iov[1].iov_base = tstate->msg->path + path_len + 1;
755 iov[1].iov_len = strlen((char *)(iov[1].iov_base)) + 1;
757 for (i=0; i<num_instances; i++) {
758 struct notifyd_instance *instance = &instances[i];
759 struct server_id_buf idbuf;
763 if (tstate->covered_by_sys_notify) {
764 if (tstate->recursive) {
765 i_filter = instance->internal_subdir_filter;
767 i_filter = instance->internal_filter;
770 if (tstate->recursive) {
771 i_filter = instance->instance.subdir_filter;
773 i_filter = instance->instance.filter;
777 if ((i_filter & tstate->msg->filter) == 0) {
781 msg.private_data = instance->instance.private_data;
783 status = messaging_send_iov(
784 tstate->msg_ctx, instance->client,
785 MSG_PVFS_NOTIFY, iov, ARRAY_SIZE(iov), NULL, 0);
787 DEBUG(10, ("%s: messaging_send_iov to %s returned %s\n",
789 server_id_str_buf(instance->client, &idbuf),
792 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
793 procid_is_local(&instance->client)) {
795 * That process has died
797 notifyd_send_delete(tstate->msg_ctx, key, instance);
801 if (!NT_STATUS_IS_OK(status)) {
802 DEBUG(1, ("%s: messaging_send_iov returned %s\n",
803 __func__, nt_errstr(status)));
809 * Send a delete request to ourselves to properly discard a notify
810 * record for an smbd that has died.
813 static void notifyd_send_delete(struct messaging_context *msg_ctx,
815 struct notifyd_instance *instance)
817 struct notify_rec_change_msg msg = {
818 .instance.private_data = instance->instance.private_data
825 * Send a rec_change to ourselves to delete a dead entry
828 iov[0] = (struct iovec) {
830 .iov_len = offsetof(struct notify_rec_change_msg, path) };
831 iov[1] = (struct iovec) { .iov_base = key.dptr, .iov_len = key.dsize };
832 iov[2] = (struct iovec) { .iov_base = &nul, .iov_len = sizeof(nul) };
834 ret = messaging_send_iov_from(
835 msg_ctx, instance->client, messaging_server_id(msg_ctx),
836 MSG_SMB_NOTIFY_REC_CHANGE, iov, ARRAY_SIZE(iov), NULL, 0);
839 DEBUG(10, ("%s: messaging_send_iov_from returned %s\n",
840 __func__, strerror(ret)));
844 static bool notifyd_get_db(struct messaging_context *msg_ctx,
845 struct messaging_rec **prec,
848 struct notifyd_state *state = talloc_get_type_abort(
849 private_data, struct notifyd_state);
850 struct messaging_rec *rec = *prec;
851 struct server_id_buf id1, id2;
853 uint64_t rec_index = UINT64_MAX;
854 uint8_t index_buf[sizeof(uint64_t)];
859 dbsize = dbwrap_marshall(state->entries, NULL, 0);
861 buf = talloc_array(rec, uint8_t, dbsize);
863 DEBUG(1, ("%s: talloc_array(%ju) failed\n",
864 __func__, (uintmax_t)dbsize));
868 dbsize = dbwrap_marshall(state->entries, buf, dbsize);
870 if (dbsize != talloc_get_size(buf)) {
871 DEBUG(1, ("%s: dbsize changed: %ju->%ju\n", __func__,
872 (uintmax_t)talloc_get_size(buf),
878 if (state->log != NULL) {
879 rec_index = state->log->rec_index;
881 SBVAL(index_buf, 0, rec_index);
883 iov[0] = (struct iovec) { .iov_base = index_buf,
884 .iov_len = sizeof(index_buf) };
885 iov[1] = (struct iovec) { .iov_base = buf,
888 DEBUG(10, ("%s: Sending %ju bytes to %s->%s\n", __func__,
889 (uintmax_t)iov_buflen(iov, ARRAY_SIZE(iov)),
890 server_id_str_buf(messaging_server_id(msg_ctx), &id1),
891 server_id_str_buf(rec->src, &id2)));
893 status = messaging_send_iov(msg_ctx, rec->src, MSG_SMB_NOTIFY_DB,
894 iov, ARRAY_SIZE(iov), NULL, 0);
896 if (!NT_STATUS_IS_OK(status)) {
897 DEBUG(1, ("%s: messaging_send_iov failed: %s\n",
898 __func__, nt_errstr(status)));
904 static int notifyd_add_proxy_syswatches(struct db_record *rec,
907 static bool notifyd_got_db(struct messaging_context *msg_ctx,
908 struct messaging_rec **prec,
911 struct notifyd_state *state = talloc_get_type_abort(
912 private_data, struct notifyd_state);
913 struct messaging_rec *rec = *prec;
914 struct notifyd_peer *p = NULL;
915 struct server_id_buf idbuf;
920 for (i=0; i<state->num_peers; i++) {
921 if (server_id_equal(&rec->src, &state->peers[i]->pid)) {
928 DEBUG(10, ("%s: Did not find peer for db from %s\n",
929 __func__, server_id_str_buf(rec->src, &idbuf)));
933 if (rec->buf.length < 8) {
934 DEBUG(10, ("%s: Got short db length %u from %s\n", __func__,
935 (unsigned)rec->buf.length,
936 server_id_str_buf(rec->src, &idbuf)));
941 p->rec_index = BVAL(rec->buf.data, 0);
943 p->db = db_open_rbt(p);
945 DEBUG(10, ("%s: db_open_rbt failed\n", __func__));
950 status = dbwrap_unmarshall(p->db, rec->buf.data + 8,
951 rec->buf.length - 8);
952 if (!NT_STATUS_IS_OK(status)) {
953 DEBUG(10, ("%s: dbwrap_unmarshall returned %s for db %s\n",
954 __func__, nt_errstr(status),
955 server_id_str_buf(rec->src, &idbuf)));
960 dbwrap_traverse_read(p->db, notifyd_add_proxy_syswatches, state,
963 DEBUG(10, ("%s: Database from %s contained %d records\n", __func__,
964 server_id_str_buf(rec->src, &idbuf), count));
969 #ifdef CLUSTER_SUPPORT
971 static void notifyd_broadcast_reclog(struct ctdbd_connection *ctdbd_conn,
972 struct server_id src,
973 struct messaging_reclog *log)
975 enum ndr_err_code ndr_err;
976 uint8_t msghdr[MESSAGE_HDR_LENGTH];
985 DEBUG(10, ("%s: rec_index=%ju, num_recs=%u\n", __func__,
986 (uintmax_t)log->rec_index, (unsigned)log->num_recs));
988 message_hdr_put(msghdr, MSG_SMB_NOTIFY_REC_CHANGES, src,
989 (struct server_id) {0 });
990 iov[0] = (struct iovec) { .iov_base = msghdr,
991 .iov_len = sizeof(msghdr) };
993 ndr_err = ndr_push_struct_blob(
995 (ndr_push_flags_fn_t)ndr_push_messaging_reclog);
996 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
997 DEBUG(1, ("%s: ndr_push_messaging_recs failed: %s\n",
998 __func__, ndr_errstr(ndr_err)));
1001 iov[1] = (struct iovec) { .iov_base = blob.data,
1002 .iov_len = blob.length };
1004 ret = ctdbd_messaging_send_iov(
1005 ctdbd_conn, CTDB_BROADCAST_VNNMAP,
1006 CTDB_SRVID_SAMBA_NOTIFY_PROXY, iov, ARRAY_SIZE(iov));
1007 TALLOC_FREE(blob.data);
1009 DEBUG(1, ("%s: ctdbd_messaging_send failed: %s\n",
1010 __func__, strerror(ret)));
1014 log->rec_index += 1;
1018 TALLOC_FREE(log->recs);
1021 struct notifyd_broadcast_reclog_state {
1022 struct tevent_context *ev;
1023 struct ctdbd_connection *ctdbd_conn;
1024 struct server_id src;
1025 struct messaging_reclog *log;
1028 static void notifyd_broadcast_reclog_next(struct tevent_req *subreq);
1030 static struct tevent_req *notifyd_broadcast_reclog_send(
1031 TALLOC_CTX *mem_ctx, struct tevent_context *ev,
1032 struct ctdbd_connection *ctdbd_conn, struct server_id src,
1033 struct messaging_reclog *log)
1035 struct tevent_req *req, *subreq;
1036 struct notifyd_broadcast_reclog_state *state;
1038 req = tevent_req_create(mem_ctx, &state,
1039 struct notifyd_broadcast_reclog_state);
1044 state->ctdbd_conn = ctdbd_conn;
1048 subreq = tevent_wakeup_send(state, state->ev,
1049 timeval_current_ofs_msec(1000));
1050 if (tevent_req_nomem(subreq, req)) {
1051 return tevent_req_post(req, ev);
1053 tevent_req_set_callback(subreq, notifyd_broadcast_reclog_next, req);
1057 static void notifyd_broadcast_reclog_next(struct tevent_req *subreq)
1059 struct tevent_req *req = tevent_req_callback_data(
1060 subreq, struct tevent_req);
1061 struct notifyd_broadcast_reclog_state *state = tevent_req_data(
1062 req, struct notifyd_broadcast_reclog_state);
1065 ok = tevent_wakeup_recv(subreq);
1066 TALLOC_FREE(subreq);
1068 tevent_req_oom(req);
1072 notifyd_broadcast_reclog(state->ctdbd_conn, state->src, state->log);
1074 subreq = tevent_wakeup_send(state, state->ev,
1075 timeval_current_ofs_msec(1000));
1076 if (tevent_req_nomem(subreq, req)) {
1079 tevent_req_set_callback(subreq, notifyd_broadcast_reclog_next, req);
1082 static int notifyd_broadcast_reclog_recv(struct tevent_req *req)
1084 return tevent_req_simple_recv_unix(req);
1087 struct notifyd_clean_peers_state {
1088 struct tevent_context *ev;
1089 struct notifyd_state *notifyd;
1092 static void notifyd_clean_peers_next(struct tevent_req *subreq);
1094 static struct tevent_req *notifyd_clean_peers_send(
1095 TALLOC_CTX *mem_ctx, struct tevent_context *ev,
1096 struct notifyd_state *notifyd)
1098 struct tevent_req *req, *subreq;
1099 struct notifyd_clean_peers_state *state;
1101 req = tevent_req_create(mem_ctx, &state,
1102 struct notifyd_clean_peers_state);
1107 state->notifyd = notifyd;
1109 subreq = tevent_wakeup_send(state, state->ev,
1110 timeval_current_ofs_msec(30000));
1111 if (tevent_req_nomem(subreq, req)) {
1112 return tevent_req_post(req, ev);
1114 tevent_req_set_callback(subreq, notifyd_clean_peers_next, req);
1118 static void notifyd_clean_peers_next(struct tevent_req *subreq)
1120 struct tevent_req *req = tevent_req_callback_data(
1121 subreq, struct tevent_req);
1122 struct notifyd_clean_peers_state *state = tevent_req_data(
1123 req, struct notifyd_clean_peers_state);
1124 struct notifyd_state *notifyd = state->notifyd;
1127 time_t now = time(NULL);
1129 ok = tevent_wakeup_recv(subreq);
1130 TALLOC_FREE(subreq);
1132 tevent_req_oom(req);
1137 while (i < notifyd->num_peers) {
1138 struct notifyd_peer *p = notifyd->peers[i];
1140 if ((now - p->last_broadcast) > 60) {
1141 struct server_id_buf idbuf;
1144 * Haven't heard for more than 60 seconds. Call this
1148 DEBUG(10, ("%s: peer %s died\n", __func__,
1149 server_id_str_buf(p->pid, &idbuf)));
1151 * This implicitly decrements notifyd->num_peers
1159 subreq = tevent_wakeup_send(state, state->ev,
1160 timeval_current_ofs_msec(30000));
1161 if (tevent_req_nomem(subreq, req)) {
1164 tevent_req_set_callback(subreq, notifyd_clean_peers_next, req);
1167 static int notifyd_clean_peers_recv(struct tevent_req *req)
1169 return tevent_req_simple_recv_unix(req);
1174 static int notifyd_add_proxy_syswatches(struct db_record *rec,
1177 struct notifyd_state *state = talloc_get_type_abort(
1178 private_data, struct notifyd_state);
1179 struct db_context *db = dbwrap_record_get_db(rec);
1180 TDB_DATA key = dbwrap_record_get_key(rec);
1181 TDB_DATA value = dbwrap_record_get_value(rec);
1182 struct notifyd_instance *instances = NULL;
1183 size_t num_instances = 0;
1185 char path[key.dsize+1];
1188 memcpy(path, key.dptr, key.dsize);
1189 path[key.dsize] = '\0';
1191 ok = notifyd_parse_entry(value.dptr, value.dsize, &instances,
1194 DEBUG(1, ("%s: Could not parse notifyd entry for %s\n",
1199 for (i=0; i<num_instances; i++) {
1200 struct notifyd_instance *instance = &instances[i];
1201 uint32_t filter = instance->instance.filter;
1202 uint32_t subdir_filter = instance->instance.subdir_filter;
1205 ret = state->sys_notify_watch(
1206 db, state->sys_notify_ctx, path,
1207 &filter, &subdir_filter,
1208 notifyd_sys_callback, state->msg_ctx,
1209 &instance->sys_watch);
1211 DEBUG(1, ("%s: inotify_watch returned %s\n",
1212 __func__, strerror(errno)));
1219 #ifdef CLUSTER_SUPPORT
1221 static int notifyd_db_del_syswatches(struct db_record *rec, void *private_data)
1223 TDB_DATA key = dbwrap_record_get_key(rec);
1224 TDB_DATA value = dbwrap_record_get_value(rec);
1225 struct notifyd_instance *instances = NULL;
1226 size_t num_instances = 0;
1230 ok = notifyd_parse_entry(value.dptr, value.dsize, &instances,
1233 DEBUG(1, ("%s: Could not parse notifyd entry for %.*s\n",
1234 __func__, (int)key.dsize, (char *)key.dptr));
1237 for (i=0; i<num_instances; i++) {
1238 TALLOC_FREE(instances[i].sys_watch);
1243 static int notifyd_peer_destructor(struct notifyd_peer *p)
1245 struct notifyd_state *state = p->state;
1248 if (p->db != NULL) {
1249 dbwrap_traverse_read(p->db, notifyd_db_del_syswatches,
1253 for (i = 0; i<state->num_peers; i++) {
1254 if (p == state->peers[i]) {
1255 state->peers[i] = state->peers[state->num_peers-1];
1256 state->num_peers -= 1;
1263 static struct notifyd_peer *notifyd_peer_new(
1264 struct notifyd_state *state, struct server_id pid)
1266 struct notifyd_peer *p, **tmp;
1268 tmp = talloc_realloc(state, state->peers, struct notifyd_peer *,
1269 state->num_peers+1);
1275 p = talloc_zero(state->peers, struct notifyd_peer);
1282 state->peers[state->num_peers] = p;
1283 state->num_peers += 1;
1285 talloc_set_destructor(p, notifyd_peer_destructor);
1290 static void notifyd_apply_reclog(struct notifyd_peer *peer,
1291 const uint8_t *msg, size_t msglen)
1293 struct notifyd_state *state = peer->state;
1294 DATA_BLOB blob = { .data = discard_const_p(uint8_t, msg),
1296 struct server_id_buf idbuf;
1297 struct messaging_reclog *log;
1298 enum ndr_err_code ndr_err;
1301 if (peer->db == NULL) {
1308 log = talloc(peer, struct messaging_reclog);
1310 DEBUG(10, ("%s: talloc failed\n", __func__));
1314 ndr_err = ndr_pull_struct_blob_all(
1316 (ndr_pull_flags_fn_t)ndr_pull_messaging_reclog);
1317 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1318 DEBUG(10, ("%s: ndr_pull_messaging_reclog failed: %s\n",
1319 __func__, ndr_errstr(ndr_err)));
1323 DEBUG(10, ("%s: Got %u recs index %ju from %s\n", __func__,
1324 (unsigned)log->num_recs, (uintmax_t)log->rec_index,
1325 server_id_str_buf(peer->pid, &idbuf)));
1327 if (log->rec_index != peer->rec_index) {
1328 DEBUG(3, ("%s: Got rec index %ju from %s, expected %ju\n",
1329 __func__, (uintmax_t)log->rec_index,
1330 server_id_str_buf(peer->pid, &idbuf),
1331 (uintmax_t)peer->rec_index));
1335 for (i=0; i<log->num_recs; i++) {
1336 struct messaging_rec *r = log->recs[i];
1337 struct notify_rec_change_msg *chg;
1341 ok = notifyd_parse_rec_change(r->buf.data, r->buf.length,
1344 DEBUG(3, ("%s: notifyd_parse_rec_change failed\n",
1349 ok = notifyd_apply_rec_change(&r->src, chg->path, pathlen,
1350 &chg->instance, peer->db,
1351 state->sys_notify_watch,
1352 state->sys_notify_ctx,
1355 DEBUG(3, ("%s: notifyd_apply_rec_change failed\n",
1361 peer->rec_index += 1;
1362 peer->last_broadcast = time(NULL);
1368 DEBUG(10, ("%s: Dropping peer %s\n", __func__,
1369 server_id_str_buf(peer->pid, &idbuf)));
1374 * Receive messaging_reclog (log of MSG_SMB_NOTIFY_REC_CHANGE
1375 * messages) broadcasts by other notifyds. Several cases:
1377 * We don't know the source. This creates a new peer. Creating a peer
1378 * involves asking the peer for its full database. We assume ordered
1379 * messages, so the new database will arrive before the next broadcast
1382 * We know the source and the log index matches. We will apply the log
1383 * locally to our peer's db as if we had received it from a local
1386 * We know the source but the log index does not match. This means we
1387 * lost a message. We just drop the whole peer and wait for the next
1388 * broadcast, which will then trigger a fresh database pull.
1391 static int notifyd_snoop_broadcast(uint32_t src_vnn, uint32_t dst_vnn,
1393 const uint8_t *msg, size_t msglen,
1396 struct notifyd_state *state = talloc_get_type_abort(
1397 private_data, struct notifyd_state);
1398 struct server_id my_id = messaging_server_id(state->msg_ctx);
1399 struct notifyd_peer *p;
1402 struct server_id src, dst;
1403 struct server_id_buf idbuf;
1406 if (msglen < MESSAGE_HDR_LENGTH) {
1407 DEBUG(10, ("%s: Got short broadcast\n", __func__));
1410 message_hdr_get(&msg_type, &src, &dst, msg);
1412 if (msg_type != MSG_SMB_NOTIFY_REC_CHANGES) {
1413 DEBUG(10, ("%s Got message %u, ignoring\n", __func__,
1414 (unsigned)msg_type));
1417 if (server_id_equal(&src, &my_id)) {
1418 DEBUG(10, ("%s: Ignoring my own broadcast\n", __func__));
1422 DEBUG(10, ("%s: Got MSG_SMB_NOTIFY_REC_CHANGES from %s\n",
1423 __func__, server_id_str_buf(src, &idbuf)));
1425 for (i=0; i<state->num_peers; i++) {
1426 if (server_id_equal(&state->peers[i]->pid, &src)) {
1428 DEBUG(10, ("%s: Applying changes to peer %u\n",
1429 __func__, (unsigned)i));
1431 notifyd_apply_reclog(state->peers[i],
1432 msg + MESSAGE_HDR_LENGTH,
1433 msglen - MESSAGE_HDR_LENGTH);
1438 DEBUG(10, ("%s: Creating new peer for %s\n", __func__,
1439 server_id_str_buf(src, &idbuf)));
1441 p = notifyd_peer_new(state, src);
1443 DEBUG(10, ("%s: notifyd_peer_new failed\n", __func__));
1447 status = messaging_send_buf(state->msg_ctx, src, MSG_SMB_NOTIFY_GET_DB,
1449 if (!NT_STATUS_IS_OK(status)) {
1450 DEBUG(10, ("%s: messaging_send_buf failed: %s\n",
1451 __func__, nt_errstr(status)));
1460 struct notifyd_parse_db_state {
1461 bool (*fn)(const char *path,
1462 struct server_id server,
1463 const struct notify_instance *instance,
1464 void *private_data);
1468 static bool notifyd_parse_db_parser(TDB_DATA key, TDB_DATA value,
1471 struct notifyd_parse_db_state *state = private_data;
1472 char path[key.dsize+1];
1473 struct notifyd_instance *instances = NULL;
1474 size_t num_instances = 0;
1478 memcpy(path, key.dptr, key.dsize);
1479 path[key.dsize] = 0;
1481 ok = notifyd_parse_entry(value.dptr, value.dsize, &instances,
1484 DEBUG(10, ("%s: Could not parse entry for path %s\n",
1489 for (i=0; i<num_instances; i++) {
1490 ok = state->fn(path, instances[i].client,
1491 &instances[i].instance,
1492 state->private_data);
1501 int notifyd_parse_db(const uint8_t *buf, size_t buflen,
1502 uint64_t *log_index,
1503 bool (*fn)(const char *path,
1504 struct server_id server,
1505 const struct notify_instance *instance,
1506 void *private_data),
1509 struct notifyd_parse_db_state state = {
1510 .fn = fn, .private_data = private_data
1517 *log_index = BVAL(buf, 0);
1522 status = dbwrap_parse_marshall_buf(
1523 buf, buflen, notifyd_parse_db_parser, &state);
1524 if (!NT_STATUS_IS_OK(status)) {
1525 return map_errno_from_nt_status(status);