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/>.
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"
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"
41 #include "smbprofile.h"
42 #include "lib/id_cache.h"
43 #include "lib/param/param.h"
44 #include "lib/background.h"
46 struct smbd_open_socket
;
47 struct smbd_child_pid
;
49 struct smbd_parent_context
{
52 struct tevent_context
*ev_ctx
;
53 struct messaging_context
*msg_ctx
;
55 /* the list of listening sockets */
56 struct smbd_open_socket
*sockets
;
58 /* the list of current child processes */
59 struct smbd_child_pid
*children
;
62 struct timed_event
*cleanup_te
;
65 struct smbd_open_socket
{
66 struct smbd_open_socket
*prev
, *next
;
67 struct smbd_parent_context
*parent
;
69 struct tevent_fd
*fde
;
72 struct smbd_child_pid
{
73 struct smbd_child_pid
*prev
, *next
;
77 extern void start_epmd(struct tevent_context
*ev_ctx
,
78 struct messaging_context
*msg_ctx
);
80 extern void start_lsasd(struct event_context
*ev_ctx
,
81 struct messaging_context
*msg_ctx
);
84 extern int dcelogin_atmost_once
;
87 /*******************************************************************
88 What to do when smb.conf is updated.
89 ********************************************************************/
91 static void smbd_parent_conf_updated(struct messaging_context
*msg
,
94 struct server_id server_id
,
97 struct tevent_context
*ev_ctx
=
98 talloc_get_type_abort(private_data
, struct tevent_context
);
100 DEBUG(10,("smbd_parent_conf_updated: Got message saying smb.conf was "
101 "updated. Reloading.\n"));
102 change_to_root_user();
103 reload_services(NULL
, NULL
, false);
104 printing_subsystem_update(ev_ctx
, msg
, false);
107 /*******************************************************************
108 What to do when printcap is updated.
109 ********************************************************************/
111 static void smb_pcap_updated(struct messaging_context
*msg
,
114 struct server_id server_id
,
117 struct tevent_context
*ev_ctx
=
118 talloc_get_type_abort(private_data
, struct tevent_context
);
120 DEBUG(10,("Got message saying pcap was updated. Reloading.\n"));
121 change_to_root_user();
122 delete_and_reload_printers(ev_ctx
, msg
);
125 /*******************************************************************
126 Delete a statcache entry.
127 ********************************************************************/
129 static void smb_stat_cache_delete(struct messaging_context
*msg
,
132 struct server_id server_id
,
135 const char *name
= (const char *)data
->data
;
136 DEBUG(10,("smb_stat_cache_delete: delete name %s\n", name
));
137 stat_cache_delete(name
);
140 /****************************************************************************
141 Send a SIGTERM to our process group.
142 *****************************************************************************/
144 static void killkids(void)
146 if(am_parent
) kill(0,SIGTERM
);
149 static void msg_exit_server(struct messaging_context
*msg
,
152 struct server_id server_id
,
155 DEBUG(3, ("got a SHUTDOWN message\n"));
156 exit_server_cleanly(NULL
);
160 static void msg_inject_fault(struct messaging_context
*msg
,
163 struct server_id src
,
168 if (data
->length
!= sizeof(sig
)) {
169 DEBUG(0, ("Process %s sent bogus signal injection request\n",
170 procid_str_static(&src
)));
174 sig
= *(int *)data
->data
;
176 exit_server("internal error injected");
181 DEBUG(0, ("Process %s requested injection of signal %d (%s)\n",
182 procid_str_static(&src
), sig
, strsignal(sig
)));
184 DEBUG(0, ("Process %s requested injection of signal %d\n",
185 procid_str_static(&src
), sig
));
190 #endif /* DEVELOPER */
192 NTSTATUS
messaging_send_to_children(struct messaging_context
*msg_ctx
,
193 uint32_t msg_type
, DATA_BLOB
* data
)
196 struct smbd_parent_context
*parent
= am_parent
;
197 struct smbd_child_pid
*child
;
199 if (parent
== NULL
) {
200 return NT_STATUS_INTERNAL_ERROR
;
203 for (child
= parent
->children
; child
!= NULL
; child
= child
->next
) {
204 status
= messaging_send(parent
->msg_ctx
,
205 pid_to_procid(child
->pid
),
207 if (!NT_STATUS_IS_OK(status
)) {
215 * Parent smbd process sets its own debug level first and then
216 * sends a message to all the smbd children to adjust their debug
217 * level to that of the parent.
220 static void smbd_msg_debug(struct messaging_context
*msg_ctx
,
223 struct server_id server_id
,
226 debug_message(msg_ctx
, private_data
, MSG_DEBUG
, server_id
, data
);
228 messaging_send_to_children(msg_ctx
, MSG_DEBUG
, data
);
231 static void smbd_parent_id_cache_kill(struct messaging_context
*msg_ctx
,
234 struct server_id server_id
,
237 const char *msg
= (data
&& data
->data
)
238 ? (const char *)data
->data
: "<NULL>";
239 struct id_cache_ref id
;
241 if (!id_cache_ref_parse(msg
, &id
)) {
242 DEBUG(0, ("Invalid ?ID: %s\n", msg
));
246 id_cache_delete_from_cache(&id
);
248 messaging_send_to_children(msg_ctx
, msg_type
, data
);
251 static void smbd_parent_id_cache_delete(struct messaging_context
*ctx
,
254 struct server_id srv_id
,
257 id_cache_delete_message(ctx
, data
, msg_type
, srv_id
, msg_data
);
259 messaging_send_to_children(ctx
, msg_type
, msg_data
);
262 struct smbd_parent_notify_state
{
263 struct tevent_context
*ev
;
264 struct messaging_context
*msg
;
266 struct notify_context
*notify
;
269 static int smbd_parent_notify_cleanup(void *private_data
);
270 static void smbd_parent_notify_cleanup_done(struct tevent_req
*req
);
271 static void smbd_parent_notify_proxy_done(struct tevent_req
*req
);
273 static bool smbd_parent_notify_init(TALLOC_CTX
*mem_ctx
,
274 struct messaging_context
*msg
,
275 struct tevent_context
*ev
)
277 struct smbd_parent_notify_state
*state
;
278 struct tevent_req
*req
;
280 state
= talloc(mem_ctx
, struct smbd_parent_notify_state
);
286 state
->msgtype
= MSG_SMB_NOTIFY_CLEANUP
;
288 state
->notify
= notify_init(state
, msg
, ev
);
289 if (state
->notify
== NULL
) {
292 req
= background_job_send(
293 state
, state
->ev
, state
->msg
, &state
->msgtype
, 1,
294 lp_parm_int(-1, "smbd", "notify cleanup interval", 60),
295 smbd_parent_notify_cleanup
, state
->notify
);
299 tevent_req_set_callback(req
, smbd_parent_notify_cleanup_done
, state
);
301 if (!lp_clustering()) {
305 req
= notify_cluster_proxy_send(state
, ev
, state
->notify
);
309 tevent_req_set_callback(req
, smbd_parent_notify_proxy_done
, state
);
317 static int smbd_parent_notify_cleanup(void *private_data
)
319 struct notify_context
*notify
= talloc_get_type_abort(
320 private_data
, struct notify_context
);
321 notify_cleanup(notify
);
322 return lp_parm_int(-1, "smbd", "notify cleanup interval", 60);
325 static void smbd_parent_notify_cleanup_done(struct tevent_req
*req
)
327 struct smbd_parent_notify_state
*state
= tevent_req_callback_data(
328 req
, struct smbd_parent_notify_state
);
331 status
= background_job_recv(req
);
333 DEBUG(1, ("notify cleanup job ended with %s\n", nt_errstr(status
)));
336 * Provide self-healing: Whatever the error condition was, it
337 * will have printed it into log.smbd. Just retrying and
338 * spamming log.smbd once a minute should be fine.
340 req
= background_job_send(
341 state
, state
->ev
, state
->msg
, &state
->msgtype
, 1, 60,
342 smbd_parent_notify_cleanup
, state
->notify
);
344 DEBUG(1, ("background_job_send failed\n"));
347 tevent_req_set_callback(req
, smbd_parent_notify_cleanup_done
, state
);
350 static void smbd_parent_notify_proxy_done(struct tevent_req
*req
)
354 ret
= notify_cluster_proxy_recv(req
);
356 DEBUG(1, ("notify proxy job ended with %s\n", strerror(ret
)));
359 static void smb_parent_force_tdis(struct messaging_context
*ctx
,
362 struct server_id srv_id
,
365 messaging_send_to_children(ctx
, msg_type
, msg_data
);
368 static void add_child_pid(struct smbd_parent_context
*parent
,
371 struct smbd_child_pid
*child
;
373 child
= talloc_zero(parent
, struct smbd_child_pid
);
375 DEBUG(0, ("Could not add child struct -- malloc failed\n"));
379 DLIST_ADD(parent
->children
, child
);
380 parent
->num_children
+= 1;
384 at most every smbd:cleanuptime seconds (default 20), we scan the BRL
385 and locking database for entries to cleanup. As a side effect this
386 also cleans up dead entries in the connections database (due to the
387 traversal in message_send_all()
389 Using a timer for this prevents a flood of traversals when a large
390 number of clients disconnect at the same time (perhaps due to a
394 static void cleanup_timeout_fn(struct event_context
*event_ctx
,
395 struct timed_event
*te
,
399 struct smbd_parent_context
*parent
=
400 talloc_get_type_abort(private_data
,
401 struct smbd_parent_context
);
403 parent
->cleanup_te
= NULL
;
405 DEBUG(1,("Cleaning up brl and lock database after unclean shutdown\n"));
406 message_send_all(parent
->msg_ctx
, MSG_SMB_UNLOCK
, NULL
, 0, NULL
);
407 messaging_send_buf(parent
->msg_ctx
,
408 messaging_server_id(parent
->msg_ctx
),
409 MSG_SMB_BRL_VALIDATE
, NULL
, 0);
412 static void remove_child_pid(struct smbd_parent_context
*parent
,
414 bool unclean_shutdown
)
416 struct smbd_child_pid
*child
;
417 struct server_id child_id
;
419 if (unclean_shutdown
) {
420 /* a child terminated uncleanly so tickle all
421 processes to see if they can grab any of the
424 DEBUG(3,(__location__
" Unclean shutdown of pid %u\n",
426 if (parent
->cleanup_te
== NULL
) {
427 /* call the cleanup timer, but not too often */
428 int cleanup_time
= lp_parm_int(-1, "smbd", "cleanuptime", 20);
429 parent
->cleanup_te
= tevent_add_timer(parent
->ev_ctx
,
431 timeval_current_ofs(cleanup_time
, 0),
434 DEBUG(1,("Scheduled cleanup of brl and lock database after unclean shutdown\n"));
438 child_id
= pid_to_procid(pid
);
440 if (!serverid_deregister(child_id
)) {
441 DEBUG(1, ("Could not remove pid %d from serverid.tdb\n",
445 for (child
= parent
->children
; child
!= NULL
; child
= child
->next
) {
446 if (child
->pid
== pid
) {
447 struct smbd_child_pid
*tmp
= child
;
448 DLIST_REMOVE(parent
->children
, child
);
450 parent
->num_children
-= 1;
455 /* not all forked child processes are added to the children list */
456 DEBUG(2, ("Could not find child %d -- ignoring\n", (int)pid
));
459 /****************************************************************************
460 Have we reached the process limit ?
461 ****************************************************************************/
463 static bool allowable_number_of_smbd_processes(struct smbd_parent_context
*parent
)
465 int max_processes
= lp_max_smbd_processes();
470 return parent
->num_children
< max_processes
;
473 static void smbd_sig_chld_handler(struct tevent_context
*ev
,
474 struct tevent_signal
*se
,
482 struct smbd_parent_context
*parent
=
483 talloc_get_type_abort(private_data
,
484 struct smbd_parent_context
);
486 while ((pid
= sys_waitpid(-1, &status
, WNOHANG
)) > 0) {
487 bool unclean_shutdown
= False
;
489 /* If the child terminated normally, assume
490 it was an unclean shutdown unless the
493 if (WIFEXITED(status
)) {
494 unclean_shutdown
= WEXITSTATUS(status
);
496 /* If the child terminated due to a signal
497 we always assume it was unclean.
499 if (WIFSIGNALED(status
)) {
500 unclean_shutdown
= True
;
502 remove_child_pid(parent
, pid
, unclean_shutdown
);
506 static void smbd_setup_sig_chld_handler(struct smbd_parent_context
*parent
)
508 struct tevent_signal
*se
;
510 se
= tevent_add_signal(parent
->ev_ctx
,
511 parent
, /* mem_ctx */
513 smbd_sig_chld_handler
,
516 exit_server("failed to setup SIGCHLD handler");
520 static void smbd_open_socket_close_fn(struct tevent_context
*ev
,
521 struct tevent_fd
*fde
,
525 /* this might be the socket_wrapper swrap_close() */
529 static void smbd_accept_connection(struct tevent_context
*ev
,
530 struct tevent_fd
*fde
,
534 struct smbd_open_socket
*s
= talloc_get_type_abort(private_data
,
535 struct smbd_open_socket
);
536 struct messaging_context
*msg_ctx
= s
->parent
->msg_ctx
;
537 struct smbd_server_connection
*sconn
= smbd_server_conn
;
538 struct sockaddr_storage addr
;
539 socklen_t in_addrlen
= sizeof(addr
);
544 fd
= accept(s
->fd
, (struct sockaddr
*)(void *)&addr
,&in_addrlen
);
546 if (fd
== -1 && errno
== EINTR
)
550 DEBUG(0,("open_sockets_smbd: accept: %s\n",
555 if (s
->parent
->interactive
) {
556 reinit_after_fork(msg_ctx
, sconn
->ev_ctx
, true);
557 smbd_process(ev
, sconn
);
558 exit_server_cleanly("end of interactive mode");
562 if (!allowable_number_of_smbd_processes(s
->parent
)) {
569 * Generate a unique id in the parent process so that we use
570 * the global random state in the parent.
572 unique_id
= serverid_get_random_unique_id();
576 NTSTATUS status
= NT_STATUS_OK
;
582 * Can't use TALLOC_FREE here. Nulling out the argument to it
583 * would overwrite memory we've just freed.
585 talloc_free(s
->parent
);
588 set_my_unique_id(unique_id
);
590 /* Stop zombies, the parent explicitly handles
591 * them, counting worker smbds. */
594 status
= reinit_after_fork(msg_ctx
,
597 if (!NT_STATUS_IS_OK(status
)) {
598 if (NT_STATUS_EQUAL(status
,
599 NT_STATUS_TOO_MANY_OPENED_FILES
)) {
600 DEBUG(0,("child process cannot initialize "
601 "because too many files are open\n"));
604 if (lp_clustering() &&
605 NT_STATUS_EQUAL(status
,
606 NT_STATUS_INTERNAL_DB_ERROR
)) {
607 DEBUG(1,("child process cannot initialize "
608 "because connection to CTDB "
613 DEBUG(0,("reinit_after_fork() failed\n"));
614 smb_panic("reinit_after_fork() failed");
617 smbd_setup_sig_term_handler(sconn
);
618 smbd_setup_sig_hup_handler(sconn
);
620 if (!serverid_register(messaging_server_id(msg_ctx
),
621 FLAG_MSG_GENERAL
|FLAG_MSG_SMBD
623 |FLAG_MSG_PRINT_GENERAL
)) {
624 exit_server_cleanly("Could not register myself in "
628 smbd_process(ev
, sconn
);
630 exit_server_cleanly("end of child");
635 DEBUG(0,("smbd_accept_connection: fork() failed: %s\n",
639 /* The parent doesn't need this socket */
642 /* Sun May 6 18:56:14 2001 ackley@cs.unm.edu:
643 Clear the closed fd info out of server_fd --
644 and more importantly, out of client_fd in
645 util_sock.c, to avoid a possible
646 getpeername failure if we reopen the logs
647 and use %I in the filename.
652 add_child_pid(s
->parent
, pid
);
655 /* Force parent to check log size after
656 * spawning child. Fix from
657 * klausr@ITAP.Physik.Uni-Stuttgart.De. The
658 * parent smbd will log to logserver.smb. It
659 * writes only two messages for each child
660 * started/finished. But each child writes,
661 * say, 50 messages also in logserver.smb,
662 * begining with the debug_count of the
663 * parent, before the child opens its own log
664 * file logserver.client. In a worst case
665 * scenario the size of logserver.smb would be
666 * checked after about 50*50=2500 messages
669 force_check_log_size();
672 static bool smbd_open_one_socket(struct smbd_parent_context
*parent
,
673 struct tevent_context
*ev_ctx
,
674 struct messaging_context
*msg_ctx
,
675 const struct sockaddr_storage
*ifss
,
678 struct smbd_open_socket
*s
;
680 s
= talloc(parent
, struct smbd_open_socket
);
686 s
->fd
= open_socket_in(SOCK_STREAM
,
688 parent
->sockets
== NULL
? 0 : 2,
692 DEBUG(0,("smbd_open_once_socket: open_socket_in: "
693 "%s\n", strerror(errno
)));
696 * We ignore an error here, as we've done before
701 /* ready to listen */
702 set_socket_options(s
->fd
, "SO_KEEPALIVE");
703 set_socket_options(s
->fd
, lp_socket_options());
705 /* Set server socket to
706 * non-blocking for the accept. */
707 set_blocking(s
->fd
, False
);
709 if (listen(s
->fd
, SMBD_LISTEN_BACKLOG
) == -1) {
710 DEBUG(0,("open_sockets_smbd: listen: "
711 "%s\n", strerror(errno
)));
717 s
->fde
= tevent_add_fd(ev_ctx
,
719 s
->fd
, TEVENT_FD_READ
,
720 smbd_accept_connection
,
723 DEBUG(0,("open_sockets_smbd: "
724 "tevent_add_fd: %s\n",
730 tevent_fd_set_close_fn(s
->fde
, smbd_open_socket_close_fn
);
732 DLIST_ADD_END(parent
->sockets
, s
, struct smbd_open_socket
*);
737 /****************************************************************************
738 Open the socket communication.
739 ****************************************************************************/
741 static bool open_sockets_smbd(struct smbd_parent_context
*parent
,
742 struct tevent_context
*ev_ctx
,
743 struct messaging_context
*msg_ctx
,
744 const char *smb_ports
)
746 int num_interfaces
= iface_count();
749 unsigned dns_port
= 0;
756 smbd_setup_sig_chld_handler(parent
);
758 /* use a reasonable default set of ports - listing on 445 and 139 */
760 ports
= lp_smb_ports();
761 if (!ports
|| !*ports
) {
762 ports
= talloc_strdup(talloc_tos(), SMB_PORTS
);
764 ports
= talloc_strdup(talloc_tos(), ports
);
767 ports
= talloc_strdup(talloc_tos(), smb_ports
);
770 if (lp_interfaces() && lp_bind_interfaces_only()) {
771 /* We have been given an interfaces line, and been
772 told to only bind to those interfaces. Create a
773 socket per interface and bind to only these.
776 /* Now open a listen socket for each of the
778 for(i
= 0; i
< num_interfaces
; i
++) {
779 const struct sockaddr_storage
*ifss
=
780 iface_n_sockaddr_storage(i
);
785 DEBUG(0,("open_sockets_smbd: "
786 "interface %d has NULL IP address !\n",
792 next_token_talloc(talloc_tos(),&ptr
, &tok
, " \t,");) {
793 unsigned port
= atoi(tok
);
794 if (port
== 0 || port
> 0xffff) {
798 /* Keep the first port for mDNS service
805 if (!smbd_open_one_socket(parent
,
815 /* Just bind to 0.0.0.0 - accept connections
820 const char *sock_addr
= lp_socket_address();
822 const char *sock_ptr
;
824 if (strequal(sock_addr
, "0.0.0.0") ||
825 strequal(sock_addr
, "::")) {
827 sock_addr
= "::,0.0.0.0";
829 sock_addr
= "0.0.0.0";
833 for (sock_ptr
=sock_addr
;
834 next_token_talloc(talloc_tos(), &sock_ptr
, &sock_tok
, " \t,"); ) {
835 for (ptr
=ports
; next_token_talloc(talloc_tos(), &ptr
, &tok
, " \t,"); ) {
836 struct sockaddr_storage ss
;
838 unsigned port
= atoi(tok
);
839 if (port
== 0 || port
> 0xffff) {
843 /* Keep the first port for mDNS service
850 /* open an incoming socket */
851 if (!interpret_string_addr(&ss
, sock_tok
,
852 AI_NUMERICHOST
|AI_PASSIVE
)) {
856 if (!smbd_open_one_socket(parent
,
867 if (parent
->sockets
== NULL
) {
868 DEBUG(0,("open_sockets_smbd: No "
869 "sockets available to bind to.\n"));
873 /* Setup the main smbd so that we can get messages. Note that
874 do this after starting listening. This is needed as when in
875 clustered mode, ctdb won't allow us to start doing database
876 operations until it has gone thru a full startup, which
877 includes checking to see that smbd is listening. */
879 if (!serverid_register(messaging_server_id(msg_ctx
),
880 FLAG_MSG_GENERAL
|FLAG_MSG_SMBD
881 |FLAG_MSG_PRINT_GENERAL
883 DEBUG(0, ("open_sockets_smbd: Failed to register "
884 "myself in serverid.tdb\n"));
888 /* Listen to messages */
890 messaging_register(msg_ctx
, NULL
, MSG_SHUTDOWN
, msg_exit_server
);
891 messaging_register(msg_ctx
, ev_ctx
, MSG_SMB_CONF_UPDATED
,
892 smbd_parent_conf_updated
);
893 messaging_register(msg_ctx
, NULL
, MSG_SMB_STAT_CACHE_DELETE
,
894 smb_stat_cache_delete
);
895 messaging_register(msg_ctx
, NULL
, MSG_DEBUG
, smbd_msg_debug
);
896 messaging_register(msg_ctx
, ev_ctx
, MSG_PRINTER_PCAP
,
898 messaging_register(msg_ctx
, NULL
, MSG_SMB_BRL_VALIDATE
,
900 messaging_register(msg_ctx
, NULL
, MSG_SMB_FORCE_TDIS
,
901 smb_parent_force_tdis
);
903 messaging_register(msg_ctx
, NULL
,
904 ID_CACHE_DELETE
, smbd_parent_id_cache_delete
);
905 messaging_register(msg_ctx
, NULL
,
906 ID_CACHE_KILL
, smbd_parent_id_cache_kill
);
908 #ifdef CLUSTER_SUPPORT
909 if (lp_clustering()) {
910 ctdbd_register_reconfigure(messaging_ctdbd_connection());
915 messaging_register(msg_ctx
, NULL
, MSG_SMB_INJECT_FAULT
,
919 if (lp_multicast_dns_register() && (dns_port
!= 0)) {
920 #ifdef WITH_DNSSD_SUPPORT
921 smbd_setup_mdns_registration(ev_ctx
,
924 #ifdef WITH_AVAHI_SUPPORT
927 avahi_conn
= avahi_start_register(ev_ctx
,
930 if (avahi_conn
== NULL
) {
931 DEBUG(10, ("avahi_start_register failed\n"));
941 handle stdin becoming readable when we are in --foreground mode
943 static void smbd_stdin_handler(struct tevent_context
*ev
,
944 struct tevent_fd
*fde
,
949 if (read(0, &c
, 1) != 1) {
950 /* we have reached EOF on stdin, which means the
951 parent has exited. Shutdown the server */
952 exit_server_cleanly("EOF on stdin");
956 static void smbd_parent_loop(struct tevent_context
*ev_ctx
,
957 struct smbd_parent_context
*parent
)
959 /* now accept incoming connections - forking a new process
960 for each incoming connection */
961 DEBUG(2,("waiting for connections\n"));
964 TALLOC_CTX
*frame
= talloc_stackframe();
966 ret
= tevent_loop_once(ev_ctx
);
968 exit_server_cleanly("tevent_loop_once() error");
974 /* NOTREACHED return True; */
978 /****************************************************************************
979 Initialise connect, service and file structs.
980 ****************************************************************************/
982 static bool init_structs(void )
985 * Set the machine NETBIOS name if not already
986 * set from the config file.
998 static void smbd_parent_sig_term_handler(struct tevent_context
*ev
,
999 struct tevent_signal
*se
,
1005 exit_server_cleanly("termination signal");
1008 static void smbd_parent_sig_hup_handler(struct tevent_context
*ev
,
1009 struct tevent_signal
*se
,
1015 struct smbd_parent_context
*parent
=
1016 talloc_get_type_abort(private_data
,
1017 struct smbd_parent_context
);
1019 change_to_root_user();
1020 DEBUG(1,("parent: Reloading services after SIGHUP\n"));
1021 reload_services(NULL
, NULL
, false);
1023 printing_subsystem_update(parent
->ev_ctx
, parent
->msg_ctx
, true);
1026 /****************************************************************************
1028 ****************************************************************************/
1030 /* Declare prototype for build_options() to avoid having to run it through
1031 mkproto.h. Mixing $(builddir) and $(srcdir) source files in the current
1032 prototype generation system is too complicated. */
1034 extern void build_options(bool screen
);
1036 int main(int argc
,const char *argv
[])
1038 /* shall I run as a daemon */
1039 bool is_daemon
= false;
1040 bool interactive
= false;
1042 bool no_process_group
= false;
1043 bool log_stdout
= false;
1045 char *profile_level
= NULL
;
1048 bool print_build_options
= False
;
1053 OPT_NO_PROCESS_GROUP
,
1056 struct poptOption long_options
[] = {
1058 {"daemon", 'D', POPT_ARG_NONE
, NULL
, OPT_DAEMON
, "Become a daemon (default)" },
1059 {"interactive", 'i', POPT_ARG_NONE
, NULL
, OPT_INTERACTIVE
, "Run interactive (not a daemon)"},
1060 {"foreground", 'F', POPT_ARG_NONE
, NULL
, OPT_FORK
, "Run daemon in foreground (for daemontools, etc.)" },
1061 {"no-process-group", '\0', POPT_ARG_NONE
, NULL
, OPT_NO_PROCESS_GROUP
, "Don't create a new process group" },
1062 {"log-stdout", 'S', POPT_ARG_NONE
, NULL
, OPT_LOG_STDOUT
, "Log to stdout" },
1063 {"build-options", 'b', POPT_ARG_NONE
, NULL
, 'b', "Print build options" },
1064 {"port", 'p', POPT_ARG_STRING
, &ports
, 0, "Listen on the specified ports"},
1065 {"profiling-level", 'P', POPT_ARG_STRING
, &profile_level
, 0, "Set profiling level","PROFILE_LEVEL"},
1067 POPT_COMMON_DYNCONFIG
1070 struct smbd_parent_context
*parent
= NULL
;
1073 struct tevent_context
*ev_ctx
;
1074 struct messaging_context
*msg_ctx
;
1075 struct tevent_signal
*se
;
1076 char *np_dir
= NULL
;
1079 * Do this before any other talloc operation
1081 talloc_enable_null_tracking();
1082 frame
= talloc_stackframe();
1084 setup_logging(argv
[0], DEBUG_DEFAULT_STDOUT
);
1088 smbd_init_globals();
1092 #ifdef HAVE_SET_AUTH_PARAMETERS
1093 set_auth_parameters(argc
,argv
);
1096 pc
= poptGetContext("smbd", argc
, argv
, long_options
, 0);
1097 while((opt
= poptGetNextOpt(pc
)) != -1) {
1102 case OPT_INTERACTIVE
:
1108 case OPT_NO_PROCESS_GROUP
:
1109 no_process_group
= true;
1111 case OPT_LOG_STDOUT
:
1115 print_build_options
= True
;
1118 d_fprintf(stderr
, "\nInvalid option %s: %s\n\n",
1119 poptBadOption(pc
, 0), poptStrerror(opt
));
1120 poptPrintUsage(pc
, stderr
, 0);
1124 poptFreeContext(pc
);
1132 setup_logging(argv
[0], DEBUG_STDOUT
);
1134 setup_logging(argv
[0], DEBUG_FILE
);
1137 if (print_build_options
) {
1138 build_options(True
); /* Display output to screen as well as debug */
1143 /* needed for SecureWare on SCO */
1147 set_remote_machine_name("smbd", False
);
1149 if (interactive
&& (DEBUGLEVEL
>= 9)) {
1150 talloc_enable_leak_report();
1153 if (log_stdout
&& Fork
) {
1154 DEBUG(0,("ERROR: Can't log to stdout (-S) unless daemon is in foreground (-F) or interactive (-i)\n"));
1158 /* we want to re-seed early to prevent time delays causing
1159 client problems at a later date. (tridge) */
1160 generate_random_buffer(NULL
, 0);
1162 /* get initial effective uid and gid */
1165 /* make absolutely sure we run as root - to handle cases where people
1166 are crazy enough to have it setuid */
1167 gain_root_privilege();
1168 gain_root_group_privilege();
1171 dump_core_setup("smbd", lp_logfile());
1173 /* we are never interested in SIGPIPE */
1174 BlockSignals(True
,SIGPIPE
);
1177 /* we are never interested in SIGFPE */
1178 BlockSignals(True
,SIGFPE
);
1181 #if defined(SIGUSR2)
1182 /* We are no longer interested in USR2 */
1183 BlockSignals(True
,SIGUSR2
);
1186 /* POSIX demands that signals are inherited. If the invoking process has
1187 * these signals masked, we will have problems, as we won't recieve them. */
1188 BlockSignals(False
, SIGHUP
);
1189 BlockSignals(False
, SIGUSR1
);
1190 BlockSignals(False
, SIGTERM
);
1192 /* Ensure we leave no zombies until we
1193 * correctly set up child handling below. */
1197 /* we want total control over the permissions on created files,
1198 so set our umask to 0 */
1203 DEBUG(0,("smbd version %s started.\n", samba_version_string()));
1204 DEBUGADD(0,("%s\n", COPYRIGHT_STARTUP_MESSAGE
));
1206 DEBUG(2,("uid=%d gid=%d euid=%d egid=%d\n",
1207 (int)getuid(),(int)getgid(),(int)geteuid(),(int)getegid()));
1209 /* Output the build options to the debug log */
1210 build_options(False
);
1212 if (sizeof(uint16
) < 2 || sizeof(uint32
) < 4) {
1213 DEBUG(0,("ERROR: Samba is not configured correctly for the word size on your machine\n"));
1217 if (!lp_load_initial_only(get_dyn_CONFIGFILE())) {
1218 DEBUG(0, ("error opening config file '%s'\n", get_dyn_CONFIGFILE()));
1222 /* Init the security context and global current_user */
1226 * Initialize the event context. The event context needs to be
1227 * initialized before the messaging context, cause the messaging
1228 * context holds an event context.
1229 * FIXME: This should be s3_tevent_context_init()
1231 ev_ctx
= server_event_context();
1232 if (ev_ctx
== NULL
) {
1237 * Init the messaging context
1238 * FIXME: This should only call messaging_init()
1240 msg_ctx
= server_messaging_context();
1241 if (msg_ctx
== NULL
) {
1246 * Reloading of the printers will not work here as we don't have a
1247 * server info and rpc services set up. It will be called later.
1249 if (!reload_services(NULL
, NULL
, false)) {
1253 /* ...NOTE... Log files are working from this point! */
1255 DEBUG(3,("loaded services\n"));
1260 if (!profile_setup(msg_ctx
, False
)) {
1261 DEBUG(0,("ERROR: failed to setup profiling\n"));
1264 if (profile_level
!= NULL
) {
1265 int pl
= atoi(profile_level
);
1266 struct server_id src
;
1268 DEBUG(1, ("setting profiling level: %s\n",profile_level
));
1270 set_profile_level(pl
, src
);
1274 if (!is_daemon
&& !is_a_socket(0)) {
1276 DEBUG(0,("standard input is not a socket, assuming -D option\n"));
1279 * Setting is_daemon here prevents us from eventually calling
1280 * the open_sockets_inetd()
1286 if (is_daemon
&& !interactive
) {
1287 DEBUG( 3, ( "Becoming a daemon.\n" ) );
1288 become_daemon(Fork
, no_process_group
, log_stdout
);
1291 set_my_unique_id(serverid_get_random_unique_id());
1295 * If we're interactive we want to set our own process group for
1296 * signal management.
1298 if (interactive
&& !no_process_group
)
1299 setpgid( (pid_t
)0, (pid_t
)0);
1302 if (!directory_exist(lp_lockdir()))
1303 mkdir(lp_lockdir(), 0755);
1305 if (!directory_exist(lp_piddir()))
1306 mkdir(lp_piddir(), 0755);
1309 pidfile_create("smbd");
1311 status
= reinit_after_fork(msg_ctx
,
1314 if (!NT_STATUS_IS_OK(status
)) {
1315 DEBUG(0,("reinit_after_fork() failed\n"));
1321 * Do not initialize the parent-child-pipe before becoming a
1322 * daemon: this is used to detect a died parent in the child
1325 status
= init_before_fork();
1326 if (!NT_STATUS_IS_OK(status
)) {
1327 DEBUG(0, ("init_before_fork failed: %s\n", nt_errstr(status
)));
1332 smbd_server_conn
->msg_ctx
= msg_ctx
;
1334 parent
= talloc_zero(ev_ctx
, struct smbd_parent_context
);
1336 exit_server("talloc(struct smbd_parent_context) failed");
1338 parent
->interactive
= interactive
;
1339 parent
->ev_ctx
= ev_ctx
;
1340 parent
->msg_ctx
= msg_ctx
;
1343 se
= tevent_add_signal(parent
->ev_ctx
,
1346 smbd_parent_sig_term_handler
,
1349 exit_server("failed to setup SIGTERM handler");
1351 se
= tevent_add_signal(parent
->ev_ctx
,
1354 smbd_parent_sig_hup_handler
,
1357 exit_server("failed to setup SIGHUP handler");
1360 /* Setup all the TDB's - including CLEAR_IF_FIRST tdb's. */
1362 if (smbd_memcache() == NULL
) {
1366 memcache_set_global(smbd_memcache());
1368 /* Initialise the password backed before the global_sam_sid
1369 to ensure that we fetch from ldap before we make a domain sid up */
1371 if(!initialize_password_db(false, ev_ctx
))
1374 if (!secrets_init()) {
1375 DEBUG(0, ("ERROR: smbd can not open secrets.tdb\n"));
1379 if (lp_server_role() == ROLE_DOMAIN_BDC
|| lp_server_role() == ROLE_DOMAIN_PDC
) {
1380 struct loadparm_context
*lp_ctx
= loadparm_init_s3(NULL
, loadparm_s3_context());
1381 if (!open_schannel_session_store(NULL
, lp_ctx
)) {
1382 DEBUG(0,("ERROR: Samba cannot open schannel store for secured NETLOGON operations.\n"));
1385 TALLOC_FREE(lp_ctx
);
1388 if(!get_global_sam_sid()) {
1389 DEBUG(0,("ERROR: Samba cannot create a SAM SID.\n"));
1393 if (!sessionid_init()) {
1397 if (!connections_init(True
))
1400 if (!locking_init())
1403 if (!messaging_tdb_parent_init(ev_ctx
)) {
1407 if (!smbd_parent_notify_init(NULL
, msg_ctx
, ev_ctx
)) {
1411 if (!serverid_parent_init(ev_ctx
)) {
1415 if (!W_ERROR_IS_OK(registry_init_full()))
1418 /* Open the share_info.tdb here, so we don't have to open
1419 after the fork on every single connection. This is a small
1420 performance improvment and reduces the total number of system
1422 if (!share_info_db_init()) {
1423 DEBUG(0,("ERROR: failed to load share info db.\n"));
1427 status
= init_system_info();
1428 if (!NT_STATUS_IS_OK(status
)) {
1429 DEBUG(1, ("ERROR: failed to setup system user info: %s.\n",
1430 nt_errstr(status
)));
1434 if (!init_guest_info()) {
1435 DEBUG(0,("ERROR: failed to setup guest info.\n"));
1439 if (!file_init(smbd_server_conn
)) {
1440 DEBUG(0, ("ERROR: file_init failed\n"));
1444 /* This MUST be done before start_epmd() because otherwise
1445 * start_epmd() forks and races against dcesrv_ep_setup() to
1446 * call directory_create_or_exist() */
1447 if (!directory_create_or_exist(lp_ncalrpc_dir(), geteuid(), 0755)) {
1448 DEBUG(0, ("Failed to create pipe directory %s - %s\n",
1449 lp_ncalrpc_dir(), strerror(errno
)));
1453 np_dir
= talloc_asprintf(talloc_tos(), "%s/np", lp_ncalrpc_dir());
1455 DEBUG(0, ("%s: Out of memory\n", __location__
));
1459 if (!directory_create_or_exist(np_dir
, geteuid(), 0700)) {
1460 DEBUG(0, ("Failed to create pipe directory %s - %s\n",
1461 np_dir
, strerror(errno
)));
1465 if (is_daemon
&& !interactive
) {
1466 if (rpc_epmapper_daemon() == RPC_DAEMON_FORK
) {
1467 start_epmd(ev_ctx
, msg_ctx
);
1471 /* only start other daemons if we are running as a daemon
1472 * -- bad things will happen if smbd is launched via inetd
1473 * and we fork a copy of ourselves here */
1474 if (is_daemon
&& !interactive
) {
1476 if (rpc_lsasd_daemon() == RPC_DAEMON_FORK
) {
1477 start_lsasd(ev_ctx
, msg_ctx
);
1480 if (!lp__disable_spoolss() &&
1481 (rpc_spoolss_daemon() != RPC_DAEMON_DISABLED
)) {
1482 bool bgq
= lp_parm_bool(-1, "smbd", "backgroundqueue", true);
1484 if (!printing_subsystem_init(ev_ctx
, msg_ctx
, true, bgq
)) {
1488 } else if (!lp__disable_spoolss() &&
1489 (rpc_spoolss_daemon() != RPC_DAEMON_DISABLED
)) {
1490 if (!printing_subsystem_init(ev_ctx
, msg_ctx
, false, false)) {
1495 if (!dcesrv_ep_setup(ev_ctx
, msg_ctx
)) {
1503 /* Started from inetd. fd 0 is the socket. */
1504 /* We will abort gracefully when the client or remote system
1506 smbd_server_conn
->sock
= dup(0);
1508 /* close stdin, stdout (if not logging to it), but not stderr */
1509 close_low_fds(true, !debug_get_output_is_stdout(), false);
1516 smbd_setup_sig_chld_handler(parent
);
1518 smbd_process(ev_ctx
, smbd_server_conn
);
1520 exit_server_cleanly(NULL
);
1524 if (!open_sockets_smbd(parent
, ev_ctx
, msg_ctx
, ports
))
1525 exit_server("open_sockets_smbd() failed");
1527 /* do a printer update now that all messaging has been set up,
1528 * before we allow clients to start connecting */
1529 printing_subsystem_update(ev_ctx
, msg_ctx
, false);
1532 /* make sure we always have a valid stackframe */
1533 frame
= talloc_stackframe();
1536 /* if we are running in the foreground then look for
1537 EOF on stdin, and exit if it happens. This allows
1538 us to die if the parent process dies
1540 tevent_add_fd(ev_ctx
, parent
, 0, TEVENT_FD_READ
, smbd_stdin_handler
, NULL
);
1543 smbd_parent_loop(ev_ctx
, parent
);
1545 exit_server_cleanly(NULL
);