s3:smbd: s/struct timed_event/struct tevent_timer
[Samba/gebeck_regimport.git] / source3 / smbd / server.c
blob2b8e3f72f2cc5ffbbb9b9caff1f420b27c23a8a4
1 /*
2 Unix SMB/CIFS implementation.
3 Main SMB server routines
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Martin Pool 2002
6 Copyright (C) Jelmer Vernooij 2002-2003
7 Copyright (C) Volker Lendecke 1993-2007
8 Copyright (C) Jeremy Allison 1993-2007
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>.
24 #include "includes.h"
25 #include "system/filesys.h"
26 #include "popt_common.h"
27 #include "smbd/smbd.h"
28 #include "smbd/globals.h"
29 #include "registry/reg_init_full.h"
30 #include "libcli/auth/schannel.h"
31 #include "secrets.h"
32 #include "memcache.h"
33 #include "ctdbd_conn.h"
34 #include "printing/queue_process.h"
35 #include "rpc_server/rpc_service_setup.h"
36 #include "rpc_server/rpc_config.h"
37 #include "serverid.h"
38 #include "passdb.h"
39 #include "auth.h"
40 #include "messages.h"
41 #include "smbprofile.h"
42 #include "lib/id_cache.h"
43 #include "lib/param/param.h"
44 #include "lib/background.h"
45 #include "lib/conn_tdb.h"
46 #include "../lib/util/pidfile.h"
47 #include "lib/smbd_shim.h"
49 struct smbd_open_socket;
50 struct smbd_child_pid;
52 struct smbd_parent_context {
53 bool interactive;
55 struct tevent_context *ev_ctx;
56 struct messaging_context *msg_ctx;
58 /* the list of listening sockets */
59 struct smbd_open_socket *sockets;
61 /* the list of current child processes */
62 struct smbd_child_pid *children;
63 size_t num_children;
65 struct tevent_timer *cleanup_te;
68 struct smbd_open_socket {
69 struct smbd_open_socket *prev, *next;
70 struct smbd_parent_context *parent;
71 int fd;
72 struct tevent_fd *fde;
75 struct smbd_child_pid {
76 struct smbd_child_pid *prev, *next;
77 pid_t pid;
80 extern void start_epmd(struct tevent_context *ev_ctx,
81 struct messaging_context *msg_ctx);
83 extern void start_lsasd(struct tevent_context *ev_ctx,
84 struct messaging_context *msg_ctx);
86 #ifdef WITH_DFS
87 extern int dcelogin_atmost_once;
88 #endif /* WITH_DFS */
90 /*******************************************************************
91 What to do when smb.conf is updated.
92 ********************************************************************/
94 static void smbd_parent_conf_updated(struct messaging_context *msg,
95 void *private_data,
96 uint32_t msg_type,
97 struct server_id server_id,
98 DATA_BLOB *data)
100 struct tevent_context *ev_ctx =
101 talloc_get_type_abort(private_data, struct tevent_context);
103 DEBUG(10,("smbd_parent_conf_updated: Got message saying smb.conf was "
104 "updated. Reloading.\n"));
105 change_to_root_user();
106 reload_services(NULL, NULL, false);
107 printing_subsystem_update(ev_ctx, msg, false);
110 /*******************************************************************
111 What to do when printcap is updated.
112 ********************************************************************/
114 static void smb_pcap_updated(struct messaging_context *msg,
115 void *private_data,
116 uint32_t msg_type,
117 struct server_id server_id,
118 DATA_BLOB *data)
120 struct tevent_context *ev_ctx =
121 talloc_get_type_abort(private_data, struct tevent_context);
123 DEBUG(10,("Got message saying pcap was updated. Reloading.\n"));
124 change_to_root_user();
125 delete_and_reload_printers(ev_ctx, msg);
128 /*******************************************************************
129 Delete a statcache entry.
130 ********************************************************************/
132 static void smb_stat_cache_delete(struct messaging_context *msg,
133 void *private_data,
134 uint32_t msg_tnype,
135 struct server_id server_id,
136 DATA_BLOB *data)
138 const char *name = (const char *)data->data;
139 DEBUG(10,("smb_stat_cache_delete: delete name %s\n", name));
140 stat_cache_delete(name);
143 /****************************************************************************
144 Send a SIGTERM to our process group.
145 *****************************************************************************/
147 static void killkids(void)
149 if(am_parent) kill(0,SIGTERM);
152 static void msg_exit_server(struct messaging_context *msg,
153 void *private_data,
154 uint32_t msg_type,
155 struct server_id server_id,
156 DATA_BLOB *data)
158 DEBUG(3, ("got a SHUTDOWN message\n"));
159 exit_server_cleanly(NULL);
162 #ifdef DEVELOPER
163 static void msg_inject_fault(struct messaging_context *msg,
164 void *private_data,
165 uint32_t msg_type,
166 struct server_id src,
167 DATA_BLOB *data)
169 int sig;
171 if (data->length != sizeof(sig)) {
172 DEBUG(0, ("Process %s sent bogus signal injection request\n",
173 procid_str_static(&src)));
174 return;
177 sig = *(int *)data->data;
178 if (sig == -1) {
179 exit_server("internal error injected");
180 return;
183 #if HAVE_STRSIGNAL
184 DEBUG(0, ("Process %s requested injection of signal %d (%s)\n",
185 procid_str_static(&src), sig, strsignal(sig)));
186 #else
187 DEBUG(0, ("Process %s requested injection of signal %d\n",
188 procid_str_static(&src), sig));
189 #endif
191 kill(getpid(), sig);
193 #endif /* DEVELOPER */
195 NTSTATUS messaging_send_to_children(struct messaging_context *msg_ctx,
196 uint32_t msg_type, DATA_BLOB* data)
198 NTSTATUS status;
199 struct smbd_parent_context *parent = am_parent;
200 struct smbd_child_pid *child;
202 if (parent == NULL) {
203 return NT_STATUS_INTERNAL_ERROR;
206 for (child = parent->children; child != NULL; child = child->next) {
207 status = messaging_send(parent->msg_ctx,
208 pid_to_procid(child->pid),
209 msg_type, data);
210 if (!NT_STATUS_IS_OK(status)) {
211 return status;
214 return NT_STATUS_OK;
218 * Parent smbd process sets its own debug level first and then
219 * sends a message to all the smbd children to adjust their debug
220 * level to that of the parent.
223 static void smbd_msg_debug(struct messaging_context *msg_ctx,
224 void *private_data,
225 uint32_t msg_type,
226 struct server_id server_id,
227 DATA_BLOB *data)
229 debug_message(msg_ctx, private_data, MSG_DEBUG, server_id, data);
231 messaging_send_to_children(msg_ctx, MSG_DEBUG, data);
234 static void smbd_parent_id_cache_kill(struct messaging_context *msg_ctx,
235 void *private_data,
236 uint32_t msg_type,
237 struct server_id server_id,
238 DATA_BLOB* data)
240 const char *msg = (data && data->data)
241 ? (const char *)data->data : "<NULL>";
242 struct id_cache_ref id;
244 if (!id_cache_ref_parse(msg, &id)) {
245 DEBUG(0, ("Invalid ?ID: %s\n", msg));
246 return;
249 id_cache_delete_from_cache(&id);
251 messaging_send_to_children(msg_ctx, msg_type, data);
254 static void smbd_parent_id_cache_delete(struct messaging_context *ctx,
255 void* data,
256 uint32_t msg_type,
257 struct server_id srv_id,
258 DATA_BLOB* msg_data)
260 id_cache_delete_message(ctx, data, msg_type, srv_id, msg_data);
262 messaging_send_to_children(ctx, msg_type, msg_data);
265 struct smbd_parent_notify_state {
266 struct tevent_context *ev;
267 struct messaging_context *msg;
268 uint32_t msgtype;
269 struct notify_context *notify;
272 static int smbd_parent_notify_cleanup(void *private_data);
273 static void smbd_parent_notify_cleanup_done(struct tevent_req *req);
274 static void smbd_parent_notify_proxy_done(struct tevent_req *req);
276 static bool smbd_parent_notify_init(TALLOC_CTX *mem_ctx,
277 struct messaging_context *msg,
278 struct tevent_context *ev)
280 struct smbd_parent_notify_state *state;
281 struct tevent_req *req;
283 state = talloc(mem_ctx, struct smbd_parent_notify_state);
284 if (state == NULL) {
285 return false;
287 state->msg = msg;
288 state->ev = ev;
289 state->msgtype = MSG_SMB_NOTIFY_CLEANUP;
291 state->notify = notify_init(state, msg, ev);
292 if (state->notify == NULL) {
293 goto fail;
295 req = background_job_send(
296 state, state->ev, state->msg, &state->msgtype, 1,
297 lp_parm_int(-1, "smbd", "notify cleanup interval", 60),
298 smbd_parent_notify_cleanup, state->notify);
299 if (req == NULL) {
300 goto fail;
302 tevent_req_set_callback(req, smbd_parent_notify_cleanup_done, state);
304 if (!lp_clustering()) {
305 return true;
308 req = notify_cluster_proxy_send(state, ev, state->notify);
309 if (req == NULL) {
310 goto fail;
312 tevent_req_set_callback(req, smbd_parent_notify_proxy_done, state);
314 return true;
315 fail:
316 TALLOC_FREE(state);
317 return false;
320 static int smbd_parent_notify_cleanup(void *private_data)
322 struct notify_context *notify = talloc_get_type_abort(
323 private_data, struct notify_context);
324 notify_cleanup(notify);
325 return lp_parm_int(-1, "smbd", "notify cleanup interval", 60);
328 static void smbd_parent_notify_cleanup_done(struct tevent_req *req)
330 struct smbd_parent_notify_state *state = tevent_req_callback_data(
331 req, struct smbd_parent_notify_state);
332 NTSTATUS status;
334 status = background_job_recv(req);
335 TALLOC_FREE(req);
336 DEBUG(1, ("notify cleanup job ended with %s\n", nt_errstr(status)));
339 * Provide self-healing: Whatever the error condition was, it
340 * will have printed it into log.smbd. Just retrying and
341 * spamming log.smbd once a minute should be fine.
343 req = background_job_send(
344 state, state->ev, state->msg, &state->msgtype, 1, 60,
345 smbd_parent_notify_cleanup, state->notify);
346 if (req == NULL) {
347 DEBUG(1, ("background_job_send failed\n"));
348 return;
350 tevent_req_set_callback(req, smbd_parent_notify_cleanup_done, state);
353 static void smbd_parent_notify_proxy_done(struct tevent_req *req)
355 int ret;
357 ret = notify_cluster_proxy_recv(req);
358 TALLOC_FREE(req);
359 DEBUG(1, ("notify proxy job ended with %s\n", strerror(ret)));
362 static void smb_parent_force_tdis(struct messaging_context *ctx,
363 void* data,
364 uint32_t msg_type,
365 struct server_id srv_id,
366 DATA_BLOB* msg_data)
368 messaging_send_to_children(ctx, msg_type, msg_data);
371 static void add_child_pid(struct smbd_parent_context *parent,
372 pid_t pid)
374 struct smbd_child_pid *child;
376 child = talloc_zero(parent, struct smbd_child_pid);
377 if (child == NULL) {
378 DEBUG(0, ("Could not add child struct -- malloc failed\n"));
379 return;
381 child->pid = pid;
382 DLIST_ADD(parent->children, child);
383 parent->num_children += 1;
387 at most every smbd:cleanuptime seconds (default 20), we scan the BRL
388 and locking database for entries to cleanup. As a side effect this
389 also cleans up dead entries in the connections database (due to the
390 traversal in message_send_all()
392 Using a timer for this prevents a flood of traversals when a large
393 number of clients disconnect at the same time (perhaps due to a
394 network outage).
397 static void cleanup_timeout_fn(struct tevent_context *event_ctx,
398 struct tevent_timer *te,
399 struct timeval now,
400 void *private_data)
402 struct smbd_parent_context *parent =
403 talloc_get_type_abort(private_data,
404 struct smbd_parent_context);
406 parent->cleanup_te = NULL;
408 DEBUG(1,("Cleaning up brl and lock database after unclean shutdown\n"));
409 message_send_all(parent->msg_ctx, MSG_SMB_UNLOCK, NULL, 0, NULL);
410 messaging_send_buf(parent->msg_ctx,
411 messaging_server_id(parent->msg_ctx),
412 MSG_SMB_BRL_VALIDATE, NULL, 0);
415 static void remove_child_pid(struct smbd_parent_context *parent,
416 pid_t pid,
417 bool unclean_shutdown)
419 struct smbd_child_pid *child;
420 struct server_id child_id;
422 child_id = pid_to_procid(pid);
424 for (child = parent->children; child != NULL; child = child->next) {
425 if (child->pid == pid) {
426 struct smbd_child_pid *tmp = child;
427 DLIST_REMOVE(parent->children, child);
428 TALLOC_FREE(tmp);
429 parent->num_children -= 1;
430 break;
434 if (child == NULL) {
435 /* not all forked child processes are added to the children list */
436 DEBUG(2, ("Could not find child %d -- ignoring\n", (int)pid));
437 return;
440 if (unclean_shutdown) {
441 /* a child terminated uncleanly so tickle all
442 processes to see if they can grab any of the
443 pending locks
445 DEBUG(3,(__location__ " Unclean shutdown of pid %u\n",
446 (unsigned int)pid));
447 if (parent->cleanup_te == NULL) {
448 /* call the cleanup timer, but not too often */
449 int cleanup_time = lp_parm_int(-1, "smbd", "cleanuptime", 20);
450 parent->cleanup_te = tevent_add_timer(parent->ev_ctx,
451 parent,
452 timeval_current_ofs(cleanup_time, 0),
453 cleanup_timeout_fn,
454 parent);
455 DEBUG(1,("Scheduled cleanup of brl and lock database after unclean shutdown\n"));
459 if (!serverid_deregister(child_id)) {
460 DEBUG(1, ("Could not remove pid %d from serverid.tdb\n",
461 (int)pid));
465 /****************************************************************************
466 Have we reached the process limit ?
467 ****************************************************************************/
469 static bool allowable_number_of_smbd_processes(struct smbd_parent_context *parent)
471 int max_processes = lp_max_smbd_processes();
473 if (!max_processes)
474 return True;
476 return parent->num_children < max_processes;
479 static void smbd_sig_chld_handler(struct tevent_context *ev,
480 struct tevent_signal *se,
481 int signum,
482 int count,
483 void *siginfo,
484 void *private_data)
486 pid_t pid;
487 int status;
488 struct smbd_parent_context *parent =
489 talloc_get_type_abort(private_data,
490 struct smbd_parent_context);
492 while ((pid = sys_waitpid(-1, &status, WNOHANG)) > 0) {
493 bool unclean_shutdown = False;
495 /* If the child terminated normally, assume
496 it was an unclean shutdown unless the
497 status is 0
499 if (WIFEXITED(status)) {
500 unclean_shutdown = WEXITSTATUS(status);
502 /* If the child terminated due to a signal
503 we always assume it was unclean.
505 if (WIFSIGNALED(status)) {
506 unclean_shutdown = True;
508 remove_child_pid(parent, pid, unclean_shutdown);
512 static void smbd_setup_sig_chld_handler(struct smbd_parent_context *parent)
514 struct tevent_signal *se;
516 se = tevent_add_signal(parent->ev_ctx,
517 parent, /* mem_ctx */
518 SIGCHLD, 0,
519 smbd_sig_chld_handler,
520 parent);
521 if (!se) {
522 exit_server("failed to setup SIGCHLD handler");
526 static void smbd_open_socket_close_fn(struct tevent_context *ev,
527 struct tevent_fd *fde,
528 int fd,
529 void *private_data)
531 /* this might be the socket_wrapper swrap_close() */
532 close(fd);
535 static void smbd_accept_connection(struct tevent_context *ev,
536 struct tevent_fd *fde,
537 uint16_t flags,
538 void *private_data)
540 struct smbd_open_socket *s = talloc_get_type_abort(private_data,
541 struct smbd_open_socket);
542 struct messaging_context *msg_ctx = s->parent->msg_ctx;
543 struct sockaddr_storage addr;
544 socklen_t in_addrlen = sizeof(addr);
545 int fd;
546 pid_t pid = 0;
547 uint64_t unique_id;
549 fd = accept(s->fd, (struct sockaddr *)(void *)&addr,&in_addrlen);
550 if (fd == -1 && errno == EINTR)
551 return;
553 if (fd == -1) {
554 DEBUG(0,("accept: %s\n",
555 strerror(errno)));
556 return;
559 if (s->parent->interactive) {
560 reinit_after_fork(msg_ctx, ev, true);
561 smbd_process(ev, msg_ctx, fd, true);
562 exit_server_cleanly("end of interactive mode");
563 return;
566 if (!allowable_number_of_smbd_processes(s->parent)) {
567 close(fd);
568 return;
572 * Generate a unique id in the parent process so that we use
573 * the global random state in the parent.
575 unique_id = serverid_get_random_unique_id();
577 pid = fork();
578 if (pid == 0) {
579 NTSTATUS status = NT_STATUS_OK;
581 /* Child code ... */
582 am_parent = NULL;
585 * Can't use TALLOC_FREE here. Nulling out the argument to it
586 * would overwrite memory we've just freed.
588 talloc_free(s->parent);
589 s = NULL;
591 set_my_unique_id(unique_id);
593 /* Stop zombies, the parent explicitly handles
594 * them, counting worker smbds. */
595 CatchChild();
597 status = reinit_after_fork(msg_ctx,
599 true);
600 if (!NT_STATUS_IS_OK(status)) {
601 if (NT_STATUS_EQUAL(status,
602 NT_STATUS_TOO_MANY_OPENED_FILES)) {
603 DEBUG(0,("child process cannot initialize "
604 "because too many files are open\n"));
605 goto exit;
607 if (lp_clustering() &&
608 NT_STATUS_EQUAL(status,
609 NT_STATUS_INTERNAL_DB_ERROR)) {
610 DEBUG(1,("child process cannot initialize "
611 "because connection to CTDB "
612 "has failed\n"));
613 goto exit;
616 DEBUG(0,("reinit_after_fork() failed\n"));
617 smb_panic("reinit_after_fork() failed");
620 smbd_process(ev, msg_ctx, fd, false);
621 exit:
622 exit_server_cleanly("end of child");
623 return;
626 if (pid < 0) {
627 DEBUG(0,("smbd_accept_connection: fork() failed: %s\n",
628 strerror(errno)));
631 /* The parent doesn't need this socket */
632 close(fd);
634 /* Sun May 6 18:56:14 2001 ackley@cs.unm.edu:
635 Clear the closed fd info out of server_fd --
636 and more importantly, out of client_fd in
637 util_sock.c, to avoid a possible
638 getpeername failure if we reopen the logs
639 and use %I in the filename.
642 if (pid != 0) {
643 add_child_pid(s->parent, pid);
646 /* Force parent to check log size after
647 * spawning child. Fix from
648 * klausr@ITAP.Physik.Uni-Stuttgart.De. The
649 * parent smbd will log to logserver.smb. It
650 * writes only two messages for each child
651 * started/finished. But each child writes,
652 * say, 50 messages also in logserver.smb,
653 * begining with the debug_count of the
654 * parent, before the child opens its own log
655 * file logserver.client. In a worst case
656 * scenario the size of logserver.smb would be
657 * checked after about 50*50=2500 messages
658 * (ca. 100kb).
659 * */
660 force_check_log_size();
663 static bool smbd_open_one_socket(struct smbd_parent_context *parent,
664 struct tevent_context *ev_ctx,
665 const struct sockaddr_storage *ifss,
666 uint16_t port)
668 struct smbd_open_socket *s;
670 s = talloc(parent, struct smbd_open_socket);
671 if (!s) {
672 return false;
675 s->parent = parent;
676 s->fd = open_socket_in(SOCK_STREAM,
677 port,
678 parent->sockets == NULL ? 0 : 2,
679 ifss,
680 true);
681 if (s->fd == -1) {
682 DEBUG(0,("smbd_open_once_socket: open_socket_in: "
683 "%s\n", strerror(errno)));
684 TALLOC_FREE(s);
686 * We ignore an error here, as we've done before
688 return true;
691 /* ready to listen */
692 set_socket_options(s->fd, "SO_KEEPALIVE");
693 set_socket_options(s->fd, lp_socket_options());
695 /* Set server socket to
696 * non-blocking for the accept. */
697 set_blocking(s->fd, False);
699 if (listen(s->fd, SMBD_LISTEN_BACKLOG) == -1) {
700 DEBUG(0,("open_sockets_smbd: listen: "
701 "%s\n", strerror(errno)));
702 close(s->fd);
703 TALLOC_FREE(s);
704 return false;
707 s->fde = tevent_add_fd(ev_ctx,
709 s->fd, TEVENT_FD_READ,
710 smbd_accept_connection,
712 if (!s->fde) {
713 DEBUG(0,("open_sockets_smbd: "
714 "tevent_add_fd: %s\n",
715 strerror(errno)));
716 close(s->fd);
717 TALLOC_FREE(s);
718 return false;
720 tevent_fd_set_close_fn(s->fde, smbd_open_socket_close_fn);
722 DLIST_ADD_END(parent->sockets, s, struct smbd_open_socket *);
724 return true;
727 /****************************************************************************
728 Open the socket communication.
729 ****************************************************************************/
731 static bool open_sockets_smbd(struct smbd_parent_context *parent,
732 struct tevent_context *ev_ctx,
733 struct messaging_context *msg_ctx,
734 const char *smb_ports)
736 int num_interfaces = iface_count();
737 int i,j;
738 const char **ports;
739 unsigned dns_port = 0;
741 #ifdef HAVE_ATEXIT
742 atexit(killkids);
743 #endif
745 /* Stop zombies */
746 smbd_setup_sig_chld_handler(parent);
748 ports = lp_smb_ports();
750 /* use a reasonable default set of ports - listing on 445 and 139 */
751 if (smb_ports) {
752 ports = (const char **)str_list_make_v3(talloc_tos(), smb_ports, NULL);
755 for (j = 0; ports && ports[j]; j++) {
756 unsigned port = atoi(ports[j]);
758 if (port == 0 || port > 0xffff) {
759 exit_server_cleanly("Invalid port in the config or on "
760 "the commandline specified!");
764 if (lp_interfaces() && lp_bind_interfaces_only()) {
765 /* We have been given an interfaces line, and been
766 told to only bind to those interfaces. Create a
767 socket per interface and bind to only these.
770 /* Now open a listen socket for each of the
771 interfaces. */
772 for(i = 0; i < num_interfaces; i++) {
773 const struct sockaddr_storage *ifss =
774 iface_n_sockaddr_storage(i);
775 if (ifss == NULL) {
776 DEBUG(0,("open_sockets_smbd: "
777 "interface %d has NULL IP address !\n",
778 i));
779 continue;
782 for (j = 0; ports && ports[j]; j++) {
783 unsigned port = atoi(ports[j]);
785 /* Keep the first port for mDNS service
786 * registration.
788 if (dns_port == 0) {
789 dns_port = port;
792 if (!smbd_open_one_socket(parent,
793 ev_ctx,
794 ifss,
795 port)) {
796 return false;
800 } else {
801 /* Just bind to 0.0.0.0 - accept connections
802 from anywhere. */
804 const char *sock_addr;
805 char *sock_tok;
806 const char *sock_ptr;
808 #if HAVE_IPV6
809 sock_addr = "::,0.0.0.0";
810 #else
811 sock_addr = "0.0.0.0";
812 #endif
814 for (sock_ptr=sock_addr;
815 next_token_talloc(talloc_tos(), &sock_ptr, &sock_tok, " \t,"); ) {
816 for (j = 0; ports && ports[j]; j++) {
817 struct sockaddr_storage ss;
818 unsigned port = atoi(ports[j]);
820 /* Keep the first port for mDNS service
821 * registration.
823 if (dns_port == 0) {
824 dns_port = port;
827 /* open an incoming socket */
828 if (!interpret_string_addr(&ss, sock_tok,
829 AI_NUMERICHOST|AI_PASSIVE)) {
830 continue;
833 if (!smbd_open_one_socket(parent,
834 ev_ctx,
835 &ss,
836 port)) {
837 return false;
843 if (parent->sockets == NULL) {
844 DEBUG(0,("open_sockets_smbd: No "
845 "sockets available to bind to.\n"));
846 return false;
849 /* Setup the main smbd so that we can get messages. Note that
850 do this after starting listening. This is needed as when in
851 clustered mode, ctdb won't allow us to start doing database
852 operations until it has gone thru a full startup, which
853 includes checking to see that smbd is listening. */
855 if (!serverid_register(messaging_server_id(msg_ctx),
856 FLAG_MSG_GENERAL|FLAG_MSG_SMBD
857 |FLAG_MSG_PRINT_GENERAL
858 |FLAG_MSG_DBWRAP)) {
859 DEBUG(0, ("open_sockets_smbd: Failed to register "
860 "myself in serverid.tdb\n"));
861 return false;
864 /* Listen to messages */
866 messaging_register(msg_ctx, NULL, MSG_SHUTDOWN, msg_exit_server);
867 messaging_register(msg_ctx, ev_ctx, MSG_SMB_CONF_UPDATED,
868 smbd_parent_conf_updated);
869 messaging_register(msg_ctx, NULL, MSG_SMB_STAT_CACHE_DELETE,
870 smb_stat_cache_delete);
871 messaging_register(msg_ctx, NULL, MSG_DEBUG, smbd_msg_debug);
872 messaging_register(msg_ctx, ev_ctx, MSG_PRINTER_PCAP,
873 smb_pcap_updated);
874 messaging_register(msg_ctx, NULL, MSG_SMB_BRL_VALIDATE,
875 brl_revalidate);
876 messaging_register(msg_ctx, NULL, MSG_SMB_FORCE_TDIS,
877 smb_parent_force_tdis);
879 messaging_register(msg_ctx, NULL,
880 ID_CACHE_DELETE, smbd_parent_id_cache_delete);
881 messaging_register(msg_ctx, NULL,
882 ID_CACHE_KILL, smbd_parent_id_cache_kill);
884 #ifdef CLUSTER_SUPPORT
885 if (lp_clustering()) {
886 ctdbd_register_reconfigure(messaging_ctdbd_connection());
888 #endif
890 #ifdef DEVELOPER
891 messaging_register(msg_ctx, NULL, MSG_SMB_INJECT_FAULT,
892 msg_inject_fault);
893 #endif
895 if (lp_multicast_dns_register() && (dns_port != 0)) {
896 #ifdef WITH_DNSSD_SUPPORT
897 smbd_setup_mdns_registration(ev_ctx,
898 parent, dns_port);
899 #endif
900 #ifdef WITH_AVAHI_SUPPORT
901 void *avahi_conn;
903 avahi_conn = avahi_start_register(ev_ctx,
904 ev_ctx,
905 dns_port);
906 if (avahi_conn == NULL) {
907 DEBUG(10, ("avahi_start_register failed\n"));
909 #endif
912 return true;
917 handle stdin becoming readable when we are in --foreground mode
919 static void smbd_stdin_handler(struct tevent_context *ev,
920 struct tevent_fd *fde,
921 uint16_t flags,
922 void *private_data)
924 char c;
925 if (read(0, &c, 1) != 1) {
926 /* we have reached EOF on stdin, which means the
927 parent has exited. Shutdown the server */
928 exit_server_cleanly("EOF on stdin");
932 static void smbd_parent_loop(struct tevent_context *ev_ctx,
933 struct smbd_parent_context *parent)
935 /* now accept incoming connections - forking a new process
936 for each incoming connection */
937 DEBUG(2,("waiting for connections\n"));
938 while (1) {
939 int ret;
940 TALLOC_CTX *frame = talloc_stackframe();
942 ret = tevent_loop_once(ev_ctx);
943 if (ret != 0) {
944 exit_server_cleanly("tevent_loop_once() error");
947 TALLOC_FREE(frame);
948 } /* end while 1 */
950 /* NOTREACHED return True; */
954 /****************************************************************************
955 Initialise connect, service and file structs.
956 ****************************************************************************/
958 static bool init_structs(void )
961 * Set the machine NETBIOS name if not already
962 * set from the config file.
965 if (!init_names())
966 return False;
968 if (!secrets_init())
969 return False;
971 return True;
974 static void smbd_parent_sig_term_handler(struct tevent_context *ev,
975 struct tevent_signal *se,
976 int signum,
977 int count,
978 void *siginfo,
979 void *private_data)
981 exit_server_cleanly("termination signal");
984 static void smbd_parent_sig_hup_handler(struct tevent_context *ev,
985 struct tevent_signal *se,
986 int signum,
987 int count,
988 void *siginfo,
989 void *private_data)
991 struct smbd_parent_context *parent =
992 talloc_get_type_abort(private_data,
993 struct smbd_parent_context);
995 change_to_root_user();
996 DEBUG(1,("parent: Reloading services after SIGHUP\n"));
997 reload_services(NULL, NULL, false);
999 printing_subsystem_update(parent->ev_ctx, parent->msg_ctx, true);
1002 /****************************************************************************
1003 main program.
1004 ****************************************************************************/
1006 /* Declare prototype for build_options() to avoid having to run it through
1007 mkproto.h. Mixing $(builddir) and $(srcdir) source files in the current
1008 prototype generation system is too complicated. */
1010 extern void build_options(bool screen);
1012 int main(int argc,const char *argv[])
1014 /* shall I run as a daemon */
1015 bool is_daemon = false;
1016 bool interactive = false;
1017 bool Fork = true;
1018 bool no_process_group = false;
1019 bool log_stdout = false;
1020 char *ports = NULL;
1021 char *profile_level = NULL;
1022 int opt;
1023 poptContext pc;
1024 bool print_build_options = False;
1025 enum {
1026 OPT_DAEMON = 1000,
1027 OPT_INTERACTIVE,
1028 OPT_FORK,
1029 OPT_NO_PROCESS_GROUP,
1030 OPT_LOG_STDOUT
1032 struct poptOption long_options[] = {
1033 POPT_AUTOHELP
1034 {"daemon", 'D', POPT_ARG_NONE, NULL, OPT_DAEMON, "Become a daemon (default)" },
1035 {"interactive", 'i', POPT_ARG_NONE, NULL, OPT_INTERACTIVE, "Run interactive (not a daemon)"},
1036 {"foreground", 'F', POPT_ARG_NONE, NULL, OPT_FORK, "Run daemon in foreground (for daemontools, etc.)" },
1037 {"no-process-group", '\0', POPT_ARG_NONE, NULL, OPT_NO_PROCESS_GROUP, "Don't create a new process group" },
1038 {"log-stdout", 'S', POPT_ARG_NONE, NULL, OPT_LOG_STDOUT, "Log to stdout" },
1039 {"build-options", 'b', POPT_ARG_NONE, NULL, 'b', "Print build options" },
1040 {"port", 'p', POPT_ARG_STRING, &ports, 0, "Listen on the specified ports"},
1041 {"profiling-level", 'P', POPT_ARG_STRING, &profile_level, 0, "Set profiling level","PROFILE_LEVEL"},
1042 POPT_COMMON_SAMBA
1043 POPT_COMMON_DYNCONFIG
1044 POPT_TABLEEND
1046 struct smbd_parent_context *parent = NULL;
1047 TALLOC_CTX *frame;
1048 NTSTATUS status;
1049 struct tevent_context *ev_ctx;
1050 struct messaging_context *msg_ctx;
1051 struct server_id server_id;
1052 struct tevent_signal *se;
1053 char *np_dir = NULL;
1054 static const struct smbd_shim smbd_shim_fns =
1056 .cancel_pending_lock_requests_by_fid = smbd_cancel_pending_lock_requests_by_fid,
1057 .send_stat_cache_delete_message = smbd_send_stat_cache_delete_message,
1058 .change_to_root_user = smbd_change_to_root_user,
1060 .contend_level2_oplocks_begin = smbd_contend_level2_oplocks_begin,
1061 .contend_level2_oplocks_end = smbd_contend_level2_oplocks_end,
1063 .become_root = smbd_become_root,
1064 .unbecome_root = smbd_unbecome_root,
1066 .exit_server = smbd_exit_server,
1067 .exit_server_cleanly = smbd_exit_server_cleanly,
1071 * Do this before any other talloc operation
1073 talloc_enable_null_tracking();
1074 frame = talloc_stackframe();
1076 setup_logging(argv[0], DEBUG_DEFAULT_STDOUT);
1078 load_case_tables();
1080 set_smbd_shim(&smbd_shim_fns);
1082 smbd_init_globals();
1084 TimeInit();
1086 #ifdef HAVE_SET_AUTH_PARAMETERS
1087 set_auth_parameters(argc,argv);
1088 #endif
1090 pc = poptGetContext("smbd", argc, argv, long_options, 0);
1091 while((opt = poptGetNextOpt(pc)) != -1) {
1092 switch (opt) {
1093 case OPT_DAEMON:
1094 is_daemon = true;
1095 break;
1096 case OPT_INTERACTIVE:
1097 interactive = true;
1098 break;
1099 case OPT_FORK:
1100 Fork = false;
1101 break;
1102 case OPT_NO_PROCESS_GROUP:
1103 no_process_group = true;
1104 break;
1105 case OPT_LOG_STDOUT:
1106 log_stdout = true;
1107 break;
1108 case 'b':
1109 print_build_options = True;
1110 break;
1111 default:
1112 d_fprintf(stderr, "\nInvalid option %s: %s\n\n",
1113 poptBadOption(pc, 0), poptStrerror(opt));
1114 poptPrintUsage(pc, stderr, 0);
1115 exit(1);
1118 poptFreeContext(pc);
1120 if (interactive) {
1121 Fork = False;
1122 log_stdout = True;
1125 if (log_stdout) {
1126 setup_logging(argv[0], DEBUG_STDOUT);
1127 } else {
1128 setup_logging(argv[0], DEBUG_FILE);
1131 if (print_build_options) {
1132 build_options(True); /* Display output to screen as well as debug */
1133 exit(0);
1136 #ifdef HAVE_SETLUID
1137 /* needed for SecureWare on SCO */
1138 setluid(0);
1139 #endif
1141 set_remote_machine_name("smbd", False);
1143 if (interactive && (DEBUGLEVEL >= 9)) {
1144 talloc_enable_leak_report();
1147 if (log_stdout && Fork) {
1148 DEBUG(0,("ERROR: Can't log to stdout (-S) unless daemon is in foreground (-F) or interactive (-i)\n"));
1149 exit(1);
1152 /* we want to re-seed early to prevent time delays causing
1153 client problems at a later date. (tridge) */
1154 generate_random_buffer(NULL, 0);
1156 /* get initial effective uid and gid */
1157 sec_init();
1159 /* make absolutely sure we run as root - to handle cases where people
1160 are crazy enough to have it setuid */
1161 gain_root_privilege();
1162 gain_root_group_privilege();
1164 fault_setup();
1165 dump_core_setup("smbd", lp_logfile(talloc_tos()));
1167 /* we are never interested in SIGPIPE */
1168 BlockSignals(True,SIGPIPE);
1170 #if defined(SIGFPE)
1171 /* we are never interested in SIGFPE */
1172 BlockSignals(True,SIGFPE);
1173 #endif
1175 #if defined(SIGUSR2)
1176 /* We are no longer interested in USR2 */
1177 BlockSignals(True,SIGUSR2);
1178 #endif
1180 /* POSIX demands that signals are inherited. If the invoking process has
1181 * these signals masked, we will have problems, as we won't recieve them. */
1182 BlockSignals(False, SIGHUP);
1183 BlockSignals(False, SIGUSR1);
1184 BlockSignals(False, SIGTERM);
1186 /* Ensure we leave no zombies until we
1187 * correctly set up child handling below. */
1189 CatchChild();
1191 /* we want total control over the permissions on created files,
1192 so set our umask to 0 */
1193 umask(0);
1195 reopen_logs();
1197 DEBUG(0,("smbd version %s started.\n", samba_version_string()));
1198 DEBUGADD(0,("%s\n", COPYRIGHT_STARTUP_MESSAGE));
1200 DEBUG(2,("uid=%d gid=%d euid=%d egid=%d\n",
1201 (int)getuid(),(int)getgid(),(int)geteuid(),(int)getegid()));
1203 /* Output the build options to the debug log */
1204 build_options(False);
1206 if (sizeof(uint16) < 2 || sizeof(uint32) < 4) {
1207 DEBUG(0,("ERROR: Samba is not configured correctly for the word size on your machine\n"));
1208 exit(1);
1211 if (!lp_load_initial_only(get_dyn_CONFIGFILE())) {
1212 DEBUG(0, ("error opening config file '%s'\n", get_dyn_CONFIGFILE()));
1213 exit(1);
1216 /* Init the security context and global current_user */
1217 init_sec_ctx();
1220 * Initialize the event context. The event context needs to be
1221 * initialized before the messaging context, cause the messaging
1222 * context holds an event context.
1223 * FIXME: This should be s3_tevent_context_init()
1225 ev_ctx = server_event_context();
1226 if (ev_ctx == NULL) {
1227 exit(1);
1231 * Init the messaging context
1232 * FIXME: This should only call messaging_init()
1234 msg_ctx = server_messaging_context();
1235 if (msg_ctx == NULL) {
1236 exit(1);
1240 * Reloading of the printers will not work here as we don't have a
1241 * server info and rpc services set up. It will be called later.
1243 if (!reload_services(NULL, NULL, false)) {
1244 exit(1);
1247 if (lp_server_role() == ROLE_ACTIVE_DIRECTORY_DC
1248 && !lp_parm_bool(-1, "server role check", "inhibit", false)) {
1249 DEBUG(0, ("server role = 'active directory domain controller' not compatible with running smbd standalone. \n"));
1250 DEBUGADD(0, ("You should start 'samba' instead, and it will control starting smbd if required\n"));
1251 exit(1);
1254 /* ...NOTE... Log files are working from this point! */
1256 DEBUG(3,("loaded services\n"));
1258 init_structs();
1260 #ifdef WITH_PROFILE
1261 if (!profile_setup(msg_ctx, False)) {
1262 DEBUG(0,("ERROR: failed to setup profiling\n"));
1263 return -1;
1265 if (profile_level != NULL) {
1266 int pl = atoi(profile_level);
1267 struct server_id src;
1269 DEBUG(1, ("setting profiling level: %s\n",profile_level));
1270 src.pid = getpid();
1271 set_profile_level(pl, src);
1273 #endif
1275 if (!is_daemon && !is_a_socket(0)) {
1276 if (!interactive)
1277 DEBUG(0,("standard input is not a socket, assuming -D option\n"));
1280 * Setting is_daemon here prevents us from eventually calling
1281 * the open_sockets_inetd()
1284 is_daemon = True;
1287 if (is_daemon && !interactive) {
1288 DEBUG( 3, ( "Becoming a daemon.\n" ) );
1289 become_daemon(Fork, no_process_group, log_stdout);
1292 set_my_unique_id(serverid_get_random_unique_id());
1294 #if HAVE_SETPGID
1296 * If we're interactive we want to set our own process group for
1297 * signal management.
1299 if (interactive && !no_process_group)
1300 setpgid( (pid_t)0, (pid_t)0);
1301 #endif
1303 if (!directory_exist(lp_lockdir()))
1304 mkdir(lp_lockdir(), 0755);
1306 if (!directory_exist(lp_piddir()))
1307 mkdir(lp_piddir(), 0755);
1309 if (is_daemon)
1310 pidfile_create(lp_piddir(), "smbd");
1312 status = reinit_after_fork(msg_ctx,
1313 ev_ctx,
1314 false);
1315 if (!NT_STATUS_IS_OK(status)) {
1316 DEBUG(0,("reinit_after_fork() failed\n"));
1317 exit(1);
1320 if (!interactive) {
1322 * Do not initialize the parent-child-pipe before becoming a
1323 * daemon: this is used to detect a died parent in the child
1324 * process.
1326 status = init_before_fork();
1327 if (!NT_STATUS_IS_OK(status)) {
1328 DEBUG(0, ("init_before_fork failed: %s\n", nt_errstr(status)));
1329 exit(1);
1333 parent = talloc_zero(ev_ctx, struct smbd_parent_context);
1334 if (!parent) {
1335 exit_server("talloc(struct smbd_parent_context) failed");
1337 parent->interactive = interactive;
1338 parent->ev_ctx = ev_ctx;
1339 parent->msg_ctx = msg_ctx;
1340 am_parent = parent;
1342 se = tevent_add_signal(parent->ev_ctx,
1343 parent,
1344 SIGTERM, 0,
1345 smbd_parent_sig_term_handler,
1346 parent);
1347 if (!se) {
1348 exit_server("failed to setup SIGTERM handler");
1350 se = tevent_add_signal(parent->ev_ctx,
1351 parent,
1352 SIGHUP, 0,
1353 smbd_parent_sig_hup_handler,
1354 parent);
1355 if (!se) {
1356 exit_server("failed to setup SIGHUP handler");
1359 /* Setup all the TDB's - including CLEAR_IF_FIRST tdb's. */
1361 if (smbd_memcache() == NULL) {
1362 exit(1);
1365 memcache_set_global(smbd_memcache());
1367 /* Initialise the password backed before the global_sam_sid
1368 to ensure that we fetch from ldap before we make a domain sid up */
1370 if(!initialize_password_db(false, ev_ctx))
1371 exit(1);
1373 if (!secrets_init()) {
1374 DEBUG(0, ("ERROR: smbd can not open secrets.tdb\n"));
1375 exit(1);
1378 if (lp_server_role() == ROLE_DOMAIN_BDC || lp_server_role() == ROLE_DOMAIN_PDC) {
1379 struct loadparm_context *lp_ctx = loadparm_init_s3(NULL, loadparm_s3_helpers());
1380 if (!open_schannel_session_store(NULL, lp_ctx)) {
1381 DEBUG(0,("ERROR: Samba cannot open schannel store for secured NETLOGON operations.\n"));
1382 exit(1);
1384 TALLOC_FREE(lp_ctx);
1387 if(!get_global_sam_sid()) {
1388 DEBUG(0,("ERROR: Samba cannot create a SAM SID.\n"));
1389 exit(1);
1392 server_id = messaging_server_id(msg_ctx);
1393 status = smbXsrv_version_global_init(&server_id);
1394 if (!NT_STATUS_IS_OK(status)) {
1395 exit(1);
1398 status = smbXsrv_session_global_init();
1399 if (!NT_STATUS_IS_OK(status)) {
1400 exit(1);
1403 status = smbXsrv_tcon_global_init();
1404 if (!NT_STATUS_IS_OK(status)) {
1405 exit(1);
1408 if (!locking_init())
1409 exit(1);
1411 if (!messaging_tdb_parent_init(ev_ctx)) {
1412 exit(1);
1415 if (!smbd_parent_notify_init(NULL, msg_ctx, ev_ctx)) {
1416 exit(1);
1419 if (!serverid_parent_init(ev_ctx)) {
1420 exit(1);
1423 if (!W_ERROR_IS_OK(registry_init_full()))
1424 exit(1);
1426 /* Open the share_info.tdb here, so we don't have to open
1427 after the fork on every single connection. This is a small
1428 performance improvment and reduces the total number of system
1429 fds used. */
1430 if (!share_info_db_init()) {
1431 DEBUG(0,("ERROR: failed to load share info db.\n"));
1432 exit(1);
1435 status = init_system_session_info();
1436 if (!NT_STATUS_IS_OK(status)) {
1437 DEBUG(1, ("ERROR: failed to setup system user info: %s.\n",
1438 nt_errstr(status)));
1439 return -1;
1442 if (!init_guest_info()) {
1443 DEBUG(0,("ERROR: failed to setup guest info.\n"));
1444 return -1;
1447 if (!file_init_global()) {
1448 DEBUG(0, ("ERROR: file_init_global() failed\n"));
1449 return -1;
1451 status = smbXsrv_open_global_init();
1452 if (!NT_STATUS_IS_OK(status)) {
1453 exit(1);
1456 /* This MUST be done before start_epmd() because otherwise
1457 * start_epmd() forks and races against dcesrv_ep_setup() to
1458 * call directory_create_or_exist() */
1459 if (!directory_create_or_exist(lp_ncalrpc_dir(), geteuid(), 0755)) {
1460 DEBUG(0, ("Failed to create pipe directory %s - %s\n",
1461 lp_ncalrpc_dir(), strerror(errno)));
1462 return -1;
1465 np_dir = talloc_asprintf(talloc_tos(), "%s/np", lp_ncalrpc_dir());
1466 if (!np_dir) {
1467 DEBUG(0, ("%s: Out of memory\n", __location__));
1468 return -1;
1471 if (!directory_create_or_exist_strict(np_dir, geteuid(), 0700)) {
1472 DEBUG(0, ("Failed to create pipe directory %s - %s\n",
1473 np_dir, strerror(errno)));
1474 return -1;
1477 if (is_daemon && !interactive) {
1478 if (rpc_epmapper_daemon() == RPC_DAEMON_FORK) {
1479 start_epmd(ev_ctx, msg_ctx);
1483 if (!dcesrv_ep_setup(ev_ctx, msg_ctx)) {
1484 exit(1);
1487 /* only start other daemons if we are running as a daemon
1488 * -- bad things will happen if smbd is launched via inetd
1489 * and we fork a copy of ourselves here */
1490 if (is_daemon && !interactive) {
1492 if (rpc_lsasd_daemon() == RPC_DAEMON_FORK) {
1493 start_lsasd(ev_ctx, msg_ctx);
1496 if (!lp__disable_spoolss() &&
1497 (rpc_spoolss_daemon() != RPC_DAEMON_DISABLED)) {
1498 bool bgq = lp_parm_bool(-1, "smbd", "backgroundqueue", true);
1500 if (!printing_subsystem_init(ev_ctx, msg_ctx, true, bgq)) {
1501 exit(1);
1504 } else if (!lp__disable_spoolss() &&
1505 (rpc_spoolss_daemon() != RPC_DAEMON_DISABLED)) {
1506 if (!printing_subsystem_init(ev_ctx, msg_ctx, false, false)) {
1507 exit(1);
1511 if (!is_daemon) {
1512 int sock;
1514 /* inetd mode */
1515 TALLOC_FREE(frame);
1517 /* Started from inetd. fd 0 is the socket. */
1518 /* We will abort gracefully when the client or remote system
1519 goes away */
1520 sock = dup(0);
1522 /* close stdin, stdout (if not logging to it), but not stderr */
1523 close_low_fds(true, !debug_get_output_is_stdout(), false);
1525 #ifdef HAVE_ATEXIT
1526 atexit(killkids);
1527 #endif
1529 /* Stop zombies */
1530 smbd_setup_sig_chld_handler(parent);
1532 smbd_process(ev_ctx, msg_ctx, sock, true);
1534 exit_server_cleanly(NULL);
1535 return(0);
1538 if (!open_sockets_smbd(parent, ev_ctx, msg_ctx, ports))
1539 exit_server("open_sockets_smbd() failed");
1541 /* do a printer update now that all messaging has been set up,
1542 * before we allow clients to start connecting */
1543 if (!lp__disable_spoolss() &&
1544 (rpc_spoolss_daemon() != RPC_DAEMON_DISABLED)) {
1545 printing_subsystem_update(ev_ctx, msg_ctx, false);
1548 TALLOC_FREE(frame);
1549 /* make sure we always have a valid stackframe */
1550 frame = talloc_stackframe();
1552 if (!Fork) {
1553 /* if we are running in the foreground then look for
1554 EOF on stdin, and exit if it happens. This allows
1555 us to die if the parent process dies
1557 tevent_add_fd(ev_ctx, parent, 0, TEVENT_FD_READ, smbd_stdin_handler, NULL);
1560 smbd_parent_loop(ev_ctx, parent);
1562 exit_server_cleanly(NULL);
1563 TALLOC_FREE(frame);
1564 return(0);