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 "util_cluster.h"
35 #include "printing/queue_process.h"
36 #include "rpc_server/rpc_service_setup.h"
37 #include "rpc_server/rpc_config.h"
42 #include "smbprofile.h"
43 #include "lib/id_cache.h"
44 #include "lib/param/param.h"
45 #include "lib/background.h"
46 #include "lib/conn_tdb.h"
47 #include "../lib/util/pidfile.h"
48 #include "lib/smbd_shim.h"
49 #include "scavenger.h"
51 struct smbd_open_socket
;
52 struct smbd_child_pid
;
54 struct smbd_parent_context
{
57 struct tevent_context
*ev_ctx
;
58 struct messaging_context
*msg_ctx
;
60 /* the list of listening sockets */
61 struct smbd_open_socket
*sockets
;
63 /* the list of current child processes */
64 struct smbd_child_pid
*children
;
67 struct tevent_timer
*cleanup_te
;
70 struct smbd_open_socket
{
71 struct smbd_open_socket
*prev
, *next
;
72 struct smbd_parent_context
*parent
;
74 struct tevent_fd
*fde
;
77 struct smbd_child_pid
{
78 struct smbd_child_pid
*prev
, *next
;
82 extern void start_epmd(struct tevent_context
*ev_ctx
,
83 struct messaging_context
*msg_ctx
);
85 extern void start_lsasd(struct tevent_context
*ev_ctx
,
86 struct messaging_context
*msg_ctx
);
89 extern int dcelogin_atmost_once
;
92 /*******************************************************************
93 What to do when smb.conf is updated.
94 ********************************************************************/
96 static void smbd_parent_conf_updated(struct messaging_context
*msg
,
99 struct server_id server_id
,
102 struct tevent_context
*ev_ctx
=
103 talloc_get_type_abort(private_data
, struct tevent_context
);
105 DEBUG(10,("smbd_parent_conf_updated: Got message saying smb.conf was "
106 "updated. Reloading.\n"));
107 change_to_root_user();
108 reload_services(NULL
, NULL
, false);
109 printing_subsystem_update(ev_ctx
, msg
, false);
112 /*******************************************************************
113 What to do when printcap is updated.
114 ********************************************************************/
116 static void smb_pcap_updated(struct messaging_context
*msg
,
119 struct server_id server_id
,
122 struct tevent_context
*ev_ctx
=
123 talloc_get_type_abort(private_data
, struct tevent_context
);
125 DEBUG(10,("Got message saying pcap was updated. Reloading.\n"));
126 change_to_root_user();
127 delete_and_reload_printers(ev_ctx
, msg
);
130 /*******************************************************************
131 Delete a statcache entry.
132 ********************************************************************/
134 static void smb_stat_cache_delete(struct messaging_context
*msg
,
137 struct server_id server_id
,
140 const char *name
= (const char *)data
->data
;
141 DEBUG(10,("smb_stat_cache_delete: delete name %s\n", name
));
142 stat_cache_delete(name
);
145 /****************************************************************************
146 Send a SIGTERM to our process group.
147 *****************************************************************************/
149 static void killkids(void)
151 if(am_parent
) kill(0,SIGTERM
);
154 static void msg_exit_server(struct messaging_context
*msg
,
157 struct server_id server_id
,
160 DEBUG(3, ("got a SHUTDOWN message\n"));
161 exit_server_cleanly(NULL
);
165 static void msg_inject_fault(struct messaging_context
*msg
,
168 struct server_id src
,
173 if (data
->length
!= sizeof(sig
)) {
174 DEBUG(0, ("Process %s sent bogus signal injection request\n",
175 procid_str_static(&src
)));
179 sig
= *(int *)data
->data
;
181 exit_server("internal error injected");
186 DEBUG(0, ("Process %s requested injection of signal %d (%s)\n",
187 procid_str_static(&src
), sig
, strsignal(sig
)));
189 DEBUG(0, ("Process %s requested injection of signal %d\n",
190 procid_str_static(&src
), sig
));
195 #endif /* DEVELOPER */
197 NTSTATUS
messaging_send_to_children(struct messaging_context
*msg_ctx
,
198 uint32_t msg_type
, DATA_BLOB
* data
)
201 struct smbd_parent_context
*parent
= am_parent
;
202 struct smbd_child_pid
*child
;
204 if (parent
== NULL
) {
205 return NT_STATUS_INTERNAL_ERROR
;
208 for (child
= parent
->children
; child
!= NULL
; child
= child
->next
) {
209 status
= messaging_send(parent
->msg_ctx
,
210 pid_to_procid(child
->pid
),
212 if (!NT_STATUS_IS_OK(status
)) {
220 * Parent smbd process sets its own debug level first and then
221 * sends a message to all the smbd children to adjust their debug
222 * level to that of the parent.
225 static void smbd_msg_debug(struct messaging_context
*msg_ctx
,
228 struct server_id server_id
,
231 debug_message(msg_ctx
, private_data
, MSG_DEBUG
, server_id
, data
);
233 messaging_send_to_children(msg_ctx
, MSG_DEBUG
, data
);
236 static void smbd_parent_id_cache_kill(struct messaging_context
*msg_ctx
,
239 struct server_id server_id
,
242 const char *msg
= (data
&& data
->data
)
243 ? (const char *)data
->data
: "<NULL>";
244 struct id_cache_ref id
;
246 if (!id_cache_ref_parse(msg
, &id
)) {
247 DEBUG(0, ("Invalid ?ID: %s\n", msg
));
251 id_cache_delete_from_cache(&id
);
253 messaging_send_to_children(msg_ctx
, msg_type
, data
);
256 static void smbd_parent_id_cache_delete(struct messaging_context
*ctx
,
259 struct server_id srv_id
,
262 id_cache_delete_message(ctx
, data
, msg_type
, srv_id
, msg_data
);
264 messaging_send_to_children(ctx
, msg_type
, msg_data
);
267 struct smbd_parent_notify_state
{
268 struct tevent_context
*ev
;
269 struct messaging_context
*msg
;
271 struct notify_context
*notify
;
274 static int smbd_parent_notify_cleanup(void *private_data
);
275 static void smbd_parent_notify_cleanup_done(struct tevent_req
*req
);
276 static void smbd_parent_notify_proxy_done(struct tevent_req
*req
);
278 static bool smbd_parent_notify_init(TALLOC_CTX
*mem_ctx
,
279 struct messaging_context
*msg
,
280 struct tevent_context
*ev
)
282 struct smbd_parent_notify_state
*state
;
283 struct tevent_req
*req
;
285 state
= talloc(mem_ctx
, struct smbd_parent_notify_state
);
291 state
->msgtype
= MSG_SMB_NOTIFY_CLEANUP
;
293 state
->notify
= notify_init(state
, msg
, ev
);
294 if (state
->notify
== NULL
) {
297 req
= background_job_send(
298 state
, state
->ev
, state
->msg
, &state
->msgtype
, 1,
299 lp_parm_int(-1, "smbd", "notify cleanup interval", 60),
300 smbd_parent_notify_cleanup
, state
->notify
);
304 tevent_req_set_callback(req
, smbd_parent_notify_cleanup_done
, state
);
306 if (!lp_clustering()) {
310 req
= notify_cluster_proxy_send(state
, ev
, state
->notify
);
314 tevent_req_set_callback(req
, smbd_parent_notify_proxy_done
, state
);
322 static int smbd_parent_notify_cleanup(void *private_data
)
324 struct notify_context
*notify
= talloc_get_type_abort(
325 private_data
, struct notify_context
);
326 notify_cleanup(notify
);
327 return lp_parm_int(-1, "smbd", "notify cleanup interval", 60);
330 static void smbd_parent_notify_cleanup_done(struct tevent_req
*req
)
332 struct smbd_parent_notify_state
*state
= tevent_req_callback_data(
333 req
, struct smbd_parent_notify_state
);
336 status
= background_job_recv(req
);
338 DEBUG(1, ("notify cleanup job ended with %s\n", nt_errstr(status
)));
341 * Provide self-healing: Whatever the error condition was, it
342 * will have printed it into log.smbd. Just retrying and
343 * spamming log.smbd once a minute should be fine.
345 req
= background_job_send(
346 state
, state
->ev
, state
->msg
, &state
->msgtype
, 1, 60,
347 smbd_parent_notify_cleanup
, state
->notify
);
349 DEBUG(1, ("background_job_send failed\n"));
352 tevent_req_set_callback(req
, smbd_parent_notify_cleanup_done
, state
);
355 static void smbd_parent_notify_proxy_done(struct tevent_req
*req
)
359 ret
= notify_cluster_proxy_recv(req
);
361 DEBUG(1, ("notify proxy job ended with %s\n", strerror(ret
)));
364 static void smb_parent_force_tdis(struct messaging_context
*ctx
,
367 struct server_id srv_id
,
370 messaging_send_to_children(ctx
, msg_type
, msg_data
);
373 static void smb_parent_kill_client_by_ip(struct messaging_context
*ctx
,
376 struct server_id srv_id
,
380 messaging_send_to_children(ctx
, msg_type
, msg_data
);
384 static void add_child_pid(struct smbd_parent_context
*parent
,
387 struct smbd_child_pid
*child
;
389 child
= talloc_zero(parent
, struct smbd_child_pid
);
391 DEBUG(0, ("Could not add child struct -- malloc failed\n"));
395 DLIST_ADD(parent
->children
, child
);
396 parent
->num_children
+= 1;
399 static void smb_tell_num_children(struct messaging_context
*ctx
, void *data
,
400 uint32_t msg_type
, struct server_id srv_id
,
403 uint8_t buf
[sizeof(uint32_t)];
406 SIVAL(buf
, 0, am_parent
->num_children
);
407 messaging_send_buf(ctx
, srv_id
, MSG_SMB_NUM_CHILDREN
,
414 at most every smbd:cleanuptime seconds (default 20), we scan the BRL
415 and locking database for entries to cleanup. As a side effect this
416 also cleans up dead entries in the connections database (due to the
417 traversal in message_send_all()
419 Using a timer for this prevents a flood of traversals when a large
420 number of clients disconnect at the same time (perhaps due to a
424 static void cleanup_timeout_fn(struct tevent_context
*event_ctx
,
425 struct tevent_timer
*te
,
429 struct smbd_parent_context
*parent
=
430 talloc_get_type_abort(private_data
,
431 struct smbd_parent_context
);
433 parent
->cleanup_te
= NULL
;
435 DEBUG(1,("Cleaning up brl and lock database after unclean shutdown\n"));
436 message_send_all(parent
->msg_ctx
, MSG_SMB_UNLOCK
, NULL
, 0, NULL
);
437 messaging_send_buf(parent
->msg_ctx
,
438 messaging_server_id(parent
->msg_ctx
),
439 MSG_SMB_BRL_VALIDATE
, NULL
, 0);
442 static void remove_child_pid(struct smbd_parent_context
*parent
,
444 bool unclean_shutdown
)
446 struct smbd_child_pid
*child
;
447 struct server_id child_id
;
449 child_id
= pid_to_procid(pid
);
451 for (child
= parent
->children
; child
!= NULL
; child
= child
->next
) {
452 if (child
->pid
== pid
) {
453 struct smbd_child_pid
*tmp
= child
;
454 DLIST_REMOVE(parent
->children
, child
);
456 parent
->num_children
-= 1;
462 /* not all forked child processes are added to the children list */
463 DEBUG(2, ("Could not find child %d -- ignoring\n", (int)pid
));
467 if (unclean_shutdown
) {
468 /* a child terminated uncleanly so tickle all
469 processes to see if they can grab any of the
472 DEBUG(3,(__location__
" Unclean shutdown of pid %u\n",
474 if (parent
->cleanup_te
== NULL
) {
475 /* call the cleanup timer, but not too often */
476 int cleanup_time
= lp_parm_int(-1, "smbd", "cleanuptime", 20);
477 parent
->cleanup_te
= tevent_add_timer(parent
->ev_ctx
,
479 timeval_current_ofs(cleanup_time
, 0),
482 DEBUG(1,("Scheduled cleanup of brl and lock database after unclean shutdown\n"));
486 * Ensure we flush any stored messages
487 * queued for the child process that
488 * terminated uncleanly.
490 messaging_cleanup_server(parent
->msg_ctx
, child_id
);
493 if (!serverid_deregister(child_id
)) {
494 DEBUG(1, ("Could not remove pid %d from serverid.tdb\n",
499 /****************************************************************************
500 Have we reached the process limit ?
501 ****************************************************************************/
503 static bool allowable_number_of_smbd_processes(struct smbd_parent_context
*parent
)
505 int max_processes
= lp_max_smbd_processes();
510 return parent
->num_children
< max_processes
;
513 static void smbd_sig_chld_handler(struct tevent_context
*ev
,
514 struct tevent_signal
*se
,
522 struct smbd_parent_context
*parent
=
523 talloc_get_type_abort(private_data
,
524 struct smbd_parent_context
);
526 while ((pid
= sys_waitpid(-1, &status
, WNOHANG
)) > 0) {
527 bool unclean_shutdown
= False
;
529 /* If the child terminated normally, assume
530 it was an unclean shutdown unless the
533 if (WIFEXITED(status
)) {
534 unclean_shutdown
= WEXITSTATUS(status
);
536 /* If the child terminated due to a signal
537 we always assume it was unclean.
539 if (WIFSIGNALED(status
)) {
540 unclean_shutdown
= True
;
542 remove_child_pid(parent
, pid
, unclean_shutdown
);
546 static void smbd_setup_sig_chld_handler(struct smbd_parent_context
*parent
)
548 struct tevent_signal
*se
;
550 se
= tevent_add_signal(parent
->ev_ctx
,
551 parent
, /* mem_ctx */
553 smbd_sig_chld_handler
,
556 exit_server("failed to setup SIGCHLD handler");
560 static void smbd_open_socket_close_fn(struct tevent_context
*ev
,
561 struct tevent_fd
*fde
,
565 /* this might be the socket_wrapper swrap_close() */
569 static void smbd_accept_connection(struct tevent_context
*ev
,
570 struct tevent_fd
*fde
,
574 struct smbd_open_socket
*s
= talloc_get_type_abort(private_data
,
575 struct smbd_open_socket
);
576 struct messaging_context
*msg_ctx
= s
->parent
->msg_ctx
;
577 struct sockaddr_storage addr
;
578 socklen_t in_addrlen
= sizeof(addr
);
583 fd
= accept(s
->fd
, (struct sockaddr
*)(void *)&addr
,&in_addrlen
);
584 if (fd
== -1 && errno
== EINTR
)
588 DEBUG(0,("accept: %s\n",
593 if (s
->parent
->interactive
) {
594 reinit_after_fork(msg_ctx
, ev
, true);
595 smbd_process(ev
, msg_ctx
, fd
, true);
596 exit_server_cleanly("end of interactive mode");
600 if (!allowable_number_of_smbd_processes(s
->parent
)) {
606 * Generate a unique id in the parent process so that we use
607 * the global random state in the parent.
609 unique_id
= serverid_get_random_unique_id();
613 NTSTATUS status
= NT_STATUS_OK
;
619 * Can't use TALLOC_FREE here. Nulling out the argument to it
620 * would overwrite memory we've just freed.
622 talloc_free(s
->parent
);
625 set_my_unique_id(unique_id
);
627 /* Stop zombies, the parent explicitly handles
628 * them, counting worker smbds. */
631 status
= reinit_after_fork(msg_ctx
,
634 if (!NT_STATUS_IS_OK(status
)) {
635 if (NT_STATUS_EQUAL(status
,
636 NT_STATUS_TOO_MANY_OPENED_FILES
)) {
637 DEBUG(0,("child process cannot initialize "
638 "because too many files are open\n"));
641 if (lp_clustering() &&
642 NT_STATUS_EQUAL(status
,
643 NT_STATUS_INTERNAL_DB_ERROR
)) {
644 DEBUG(1,("child process cannot initialize "
645 "because connection to CTDB "
650 DEBUG(0,("reinit_after_fork() failed\n"));
651 smb_panic("reinit_after_fork() failed");
654 smbd_process(ev
, msg_ctx
, fd
, false);
656 exit_server_cleanly("end of child");
661 DEBUG(0,("smbd_accept_connection: fork() failed: %s\n",
665 /* The parent doesn't need this socket */
668 /* Sun May 6 18:56:14 2001 ackley@cs.unm.edu:
669 Clear the closed fd info out of server_fd --
670 and more importantly, out of client_fd in
671 util_sock.c, to avoid a possible
672 getpeername failure if we reopen the logs
673 and use %I in the filename.
677 add_child_pid(s
->parent
, pid
);
680 /* Force parent to check log size after
681 * spawning child. Fix from
682 * klausr@ITAP.Physik.Uni-Stuttgart.De. The
683 * parent smbd will log to logserver.smb. It
684 * writes only two messages for each child
685 * started/finished. But each child writes,
686 * say, 50 messages also in logserver.smb,
687 * begining with the debug_count of the
688 * parent, before the child opens its own log
689 * file logserver.client. In a worst case
690 * scenario the size of logserver.smb would be
691 * checked after about 50*50=2500 messages
694 force_check_log_size();
697 static bool smbd_open_one_socket(struct smbd_parent_context
*parent
,
698 struct tevent_context
*ev_ctx
,
699 const struct sockaddr_storage
*ifss
,
702 struct smbd_open_socket
*s
;
704 s
= talloc(parent
, struct smbd_open_socket
);
710 s
->fd
= open_socket_in(SOCK_STREAM
,
712 parent
->sockets
== NULL
? 0 : 2,
716 DEBUG(0,("smbd_open_once_socket: open_socket_in: "
717 "%s\n", strerror(errno
)));
720 * We ignore an error here, as we've done before
725 /* ready to listen */
726 set_socket_options(s
->fd
, "SO_KEEPALIVE");
727 set_socket_options(s
->fd
, lp_socket_options());
729 /* Set server socket to
730 * non-blocking for the accept. */
731 set_blocking(s
->fd
, False
);
733 if (listen(s
->fd
, SMBD_LISTEN_BACKLOG
) == -1) {
734 DEBUG(0,("open_sockets_smbd: listen: "
735 "%s\n", strerror(errno
)));
741 s
->fde
= tevent_add_fd(ev_ctx
,
743 s
->fd
, TEVENT_FD_READ
,
744 smbd_accept_connection
,
747 DEBUG(0,("open_sockets_smbd: "
748 "tevent_add_fd: %s\n",
754 tevent_fd_set_close_fn(s
->fde
, smbd_open_socket_close_fn
);
756 DLIST_ADD_END(parent
->sockets
, s
, struct smbd_open_socket
*);
761 /****************************************************************************
762 Open the socket communication.
763 ****************************************************************************/
765 static bool open_sockets_smbd(struct smbd_parent_context
*parent
,
766 struct tevent_context
*ev_ctx
,
767 struct messaging_context
*msg_ctx
,
768 const char *smb_ports
)
770 int num_interfaces
= iface_count();
773 unsigned dns_port
= 0;
780 smbd_setup_sig_chld_handler(parent
);
782 ports
= lp_smb_ports();
784 /* use a reasonable default set of ports - listing on 445 and 139 */
786 ports
= (const char **)str_list_make_v3(talloc_tos(), smb_ports
, NULL
);
789 for (j
= 0; ports
&& ports
[j
]; j
++) {
790 unsigned port
= atoi(ports
[j
]);
792 if (port
== 0 || port
> 0xffff) {
793 exit_server_cleanly("Invalid port in the config or on "
794 "the commandline specified!");
798 if (lp_interfaces() && lp_bind_interfaces_only()) {
799 /* We have been given an interfaces line, and been
800 told to only bind to those interfaces. Create a
801 socket per interface and bind to only these.
804 /* Now open a listen socket for each of the
806 for(i
= 0; i
< num_interfaces
; i
++) {
807 const struct sockaddr_storage
*ifss
=
808 iface_n_sockaddr_storage(i
);
810 DEBUG(0,("open_sockets_smbd: "
811 "interface %d has NULL IP address !\n",
816 for (j
= 0; ports
&& ports
[j
]; j
++) {
817 unsigned port
= atoi(ports
[j
]);
819 /* Keep the first port for mDNS service
826 if (!smbd_open_one_socket(parent
,
835 /* Just bind to 0.0.0.0 - accept connections
838 const char *sock_addr
;
840 const char *sock_ptr
;
843 sock_addr
= "::,0.0.0.0";
845 sock_addr
= "0.0.0.0";
848 for (sock_ptr
=sock_addr
;
849 next_token_talloc(talloc_tos(), &sock_ptr
, &sock_tok
, " \t,"); ) {
850 for (j
= 0; ports
&& ports
[j
]; j
++) {
851 struct sockaddr_storage ss
;
852 unsigned port
= atoi(ports
[j
]);
854 /* Keep the first port for mDNS service
861 /* open an incoming socket */
862 if (!interpret_string_addr(&ss
, sock_tok
,
863 AI_NUMERICHOST
|AI_PASSIVE
)) {
867 if (!smbd_open_one_socket(parent
,
877 if (parent
->sockets
== NULL
) {
878 DEBUG(0,("open_sockets_smbd: No "
879 "sockets available to bind to.\n"));
883 /* Setup the main smbd so that we can get messages. Note that
884 do this after starting listening. This is needed as when in
885 clustered mode, ctdb won't allow us to start doing database
886 operations until it has gone thru a full startup, which
887 includes checking to see that smbd is listening. */
889 if (!serverid_register(messaging_server_id(msg_ctx
),
890 FLAG_MSG_GENERAL
|FLAG_MSG_SMBD
891 |FLAG_MSG_PRINT_GENERAL
893 DEBUG(0, ("open_sockets_smbd: Failed to register "
894 "myself in serverid.tdb\n"));
898 /* Listen to messages */
900 messaging_register(msg_ctx
, NULL
, MSG_SHUTDOWN
, msg_exit_server
);
901 messaging_register(msg_ctx
, ev_ctx
, MSG_SMB_CONF_UPDATED
,
902 smbd_parent_conf_updated
);
903 messaging_register(msg_ctx
, NULL
, MSG_SMB_STAT_CACHE_DELETE
,
904 smb_stat_cache_delete
);
905 messaging_register(msg_ctx
, NULL
, MSG_DEBUG
, smbd_msg_debug
);
906 messaging_register(msg_ctx
, ev_ctx
, MSG_PRINTER_PCAP
,
908 messaging_register(msg_ctx
, NULL
, MSG_SMB_BRL_VALIDATE
,
910 messaging_register(msg_ctx
, NULL
, MSG_SMB_FORCE_TDIS
,
911 smb_parent_force_tdis
);
912 messaging_register(msg_ctx
, NULL
, MSG_SMB_KILL_CLIENT_IP
,
913 smb_parent_kill_client_by_ip
);
914 messaging_register(msg_ctx
, NULL
, MSG_SMB_TELL_NUM_CHILDREN
,
915 smb_tell_num_children
);
917 messaging_register(msg_ctx
, NULL
,
918 ID_CACHE_DELETE
, smbd_parent_id_cache_delete
);
919 messaging_register(msg_ctx
, NULL
,
920 ID_CACHE_KILL
, smbd_parent_id_cache_kill
);
922 if (lp_clustering()) {
923 ctdbd_register_reconfigure(messaging_ctdbd_connection());
927 messaging_register(msg_ctx
, NULL
, MSG_SMB_INJECT_FAULT
,
931 if (lp_multicast_dns_register() && (dns_port
!= 0)) {
932 #ifdef WITH_DNSSD_SUPPORT
933 smbd_setup_mdns_registration(ev_ctx
,
936 #ifdef WITH_AVAHI_SUPPORT
939 avahi_conn
= avahi_start_register(ev_ctx
,
942 if (avahi_conn
== NULL
) {
943 DEBUG(10, ("avahi_start_register failed\n"));
953 handle stdin becoming readable when we are in --foreground mode
955 static void smbd_stdin_handler(struct tevent_context
*ev
,
956 struct tevent_fd
*fde
,
961 if (read(0, &c
, 1) != 1) {
962 /* we have reached EOF on stdin, which means the
963 parent has exited. Shutdown the server */
964 exit_server_cleanly("EOF on stdin");
968 static void smbd_parent_loop(struct tevent_context
*ev_ctx
,
969 struct smbd_parent_context
*parent
)
971 /* now accept incoming connections - forking a new process
972 for each incoming connection */
973 DEBUG(2,("waiting for connections\n"));
976 TALLOC_CTX
*frame
= talloc_stackframe();
978 ret
= tevent_loop_once(ev_ctx
);
980 exit_server_cleanly("tevent_loop_once() error");
986 /* NOTREACHED return True; */
990 /****************************************************************************
991 Initialise connect, service and file structs.
992 ****************************************************************************/
994 static bool init_structs(void )
997 * Set the machine NETBIOS name if not already
998 * set from the config file.
1004 if (!secrets_init())
1010 static void smbd_parent_sig_term_handler(struct tevent_context
*ev
,
1011 struct tevent_signal
*se
,
1017 exit_server_cleanly("termination signal");
1020 static void smbd_parent_sig_hup_handler(struct tevent_context
*ev
,
1021 struct tevent_signal
*se
,
1027 struct smbd_parent_context
*parent
=
1028 talloc_get_type_abort(private_data
,
1029 struct smbd_parent_context
);
1031 change_to_root_user();
1032 DEBUG(1,("parent: Reloading services after SIGHUP\n"));
1033 reload_services(NULL
, NULL
, false);
1035 printing_subsystem_update(parent
->ev_ctx
, parent
->msg_ctx
, true);
1038 /****************************************************************************
1040 ****************************************************************************/
1042 /* Declare prototype for build_options() to avoid having to run it through
1043 mkproto.h. Mixing $(builddir) and $(srcdir) source files in the current
1044 prototype generation system is too complicated. */
1046 extern void build_options(bool screen
);
1048 int main(int argc
,const char *argv
[])
1050 /* shall I run as a daemon */
1051 bool is_daemon
= false;
1052 bool interactive
= false;
1054 bool no_process_group
= false;
1055 bool log_stdout
= false;
1057 char *profile_level
= NULL
;
1060 bool print_build_options
= False
;
1065 OPT_NO_PROCESS_GROUP
,
1068 struct poptOption long_options
[] = {
1070 {"daemon", 'D', POPT_ARG_NONE
, NULL
, OPT_DAEMON
, "Become a daemon (default)" },
1071 {"interactive", 'i', POPT_ARG_NONE
, NULL
, OPT_INTERACTIVE
, "Run interactive (not a daemon)"},
1072 {"foreground", 'F', POPT_ARG_NONE
, NULL
, OPT_FORK
, "Run daemon in foreground (for daemontools, etc.)" },
1073 {"no-process-group", '\0', POPT_ARG_NONE
, NULL
, OPT_NO_PROCESS_GROUP
, "Don't create a new process group" },
1074 {"log-stdout", 'S', POPT_ARG_NONE
, NULL
, OPT_LOG_STDOUT
, "Log to stdout" },
1075 {"build-options", 'b', POPT_ARG_NONE
, NULL
, 'b', "Print build options" },
1076 {"port", 'p', POPT_ARG_STRING
, &ports
, 0, "Listen on the specified ports"},
1077 {"profiling-level", 'P', POPT_ARG_STRING
, &profile_level
, 0, "Set profiling level","PROFILE_LEVEL"},
1081 struct smbd_parent_context
*parent
= NULL
;
1084 struct tevent_context
*ev_ctx
;
1085 struct messaging_context
*msg_ctx
;
1086 struct server_id server_id
;
1087 struct tevent_signal
*se
;
1088 char *np_dir
= NULL
;
1089 static const struct smbd_shim smbd_shim_fns
=
1091 .cancel_pending_lock_requests_by_fid
= smbd_cancel_pending_lock_requests_by_fid
,
1092 .send_stat_cache_delete_message
= smbd_send_stat_cache_delete_message
,
1093 .change_to_root_user
= smbd_change_to_root_user
,
1094 .become_authenticated_pipe_user
= smbd_become_authenticated_pipe_user
,
1095 .unbecome_authenticated_pipe_user
= smbd_unbecome_authenticated_pipe_user
,
1097 .contend_level2_oplocks_begin
= smbd_contend_level2_oplocks_begin
,
1098 .contend_level2_oplocks_end
= smbd_contend_level2_oplocks_end
,
1100 .become_root
= smbd_become_root
,
1101 .unbecome_root
= smbd_unbecome_root
,
1103 .exit_server
= smbd_exit_server
,
1104 .exit_server_cleanly
= smbd_exit_server_cleanly
,
1108 * Do this before any other talloc operation
1110 talloc_enable_null_tracking();
1111 frame
= talloc_stackframe();
1113 setup_logging(argv
[0], DEBUG_DEFAULT_STDOUT
);
1117 set_smbd_shim(&smbd_shim_fns
);
1119 smbd_init_globals();
1123 #ifdef HAVE_SET_AUTH_PARAMETERS
1124 set_auth_parameters(argc
,argv
);
1127 pc
= poptGetContext("smbd", argc
, argv
, long_options
, 0);
1128 while((opt
= poptGetNextOpt(pc
)) != -1) {
1133 case OPT_INTERACTIVE
:
1139 case OPT_NO_PROCESS_GROUP
:
1140 no_process_group
= true;
1142 case OPT_LOG_STDOUT
:
1146 print_build_options
= True
;
1149 d_fprintf(stderr
, "\nInvalid option %s: %s\n\n",
1150 poptBadOption(pc
, 0), poptStrerror(opt
));
1151 poptPrintUsage(pc
, stderr
, 0);
1155 poptFreeContext(pc
);
1163 setup_logging(argv
[0], DEBUG_STDOUT
);
1165 setup_logging(argv
[0], DEBUG_FILE
);
1168 if (print_build_options
) {
1169 build_options(True
); /* Display output to screen as well as debug */
1174 /* needed for SecureWare on SCO */
1178 set_remote_machine_name("smbd", False
);
1180 if (interactive
&& (DEBUGLEVEL
>= 9)) {
1181 talloc_enable_leak_report();
1184 if (log_stdout
&& Fork
) {
1185 DEBUG(0,("ERROR: Can't log to stdout (-S) unless daemon is in foreground (-F) or interactive (-i)\n"));
1189 /* we want to re-seed early to prevent time delays causing
1190 client problems at a later date. (tridge) */
1191 generate_random_buffer(NULL
, 0);
1193 /* get initial effective uid and gid */
1196 /* make absolutely sure we run as root - to handle cases where people
1197 are crazy enough to have it setuid */
1198 gain_root_privilege();
1199 gain_root_group_privilege();
1202 dump_core_setup("smbd", lp_logfile(talloc_tos()));
1204 /* we are never interested in SIGPIPE */
1205 BlockSignals(True
,SIGPIPE
);
1208 /* we are never interested in SIGFPE */
1209 BlockSignals(True
,SIGFPE
);
1212 #if defined(SIGUSR2)
1213 /* We are no longer interested in USR2 */
1214 BlockSignals(True
,SIGUSR2
);
1217 /* POSIX demands that signals are inherited. If the invoking process has
1218 * these signals masked, we will have problems, as we won't recieve them. */
1219 BlockSignals(False
, SIGHUP
);
1220 BlockSignals(False
, SIGUSR1
);
1221 BlockSignals(False
, SIGTERM
);
1223 /* Ensure we leave no zombies until we
1224 * correctly set up child handling below. */
1228 /* we want total control over the permissions on created files,
1229 so set our umask to 0 */
1234 DEBUG(0,("smbd version %s started.\n", samba_version_string()));
1235 DEBUGADD(0,("%s\n", COPYRIGHT_STARTUP_MESSAGE
));
1237 DEBUG(2,("uid=%d gid=%d euid=%d egid=%d\n",
1238 (int)getuid(),(int)getgid(),(int)geteuid(),(int)getegid()));
1240 /* Output the build options to the debug log */
1241 build_options(False
);
1243 if (sizeof(uint16
) < 2 || sizeof(uint32
) < 4) {
1244 DEBUG(0,("ERROR: Samba is not configured correctly for the word size on your machine\n"));
1248 if (!lp_load_initial_only(get_dyn_CONFIGFILE())) {
1249 DEBUG(0, ("error opening config file '%s'\n", get_dyn_CONFIGFILE()));
1253 if (!cluster_probe_ok()) {
1257 /* Init the security context and global current_user */
1261 * Initialize the event context. The event context needs to be
1262 * initialized before the messaging context, cause the messaging
1263 * context holds an event context.
1264 * FIXME: This should be s3_tevent_context_init()
1266 ev_ctx
= server_event_context();
1267 if (ev_ctx
== NULL
) {
1272 * Init the messaging context
1273 * FIXME: This should only call messaging_init()
1275 msg_ctx
= server_messaging_context();
1276 if (msg_ctx
== NULL
) {
1281 * Reloading of the printers will not work here as we don't have a
1282 * server info and rpc services set up. It will be called later.
1284 if (!reload_services(NULL
, NULL
, false)) {
1288 if (lp_server_role() == ROLE_ACTIVE_DIRECTORY_DC
1289 && !lp_parm_bool(-1, "server role check", "inhibit", false)) {
1290 DEBUG(0, ("server role = 'active directory domain controller' not compatible with running smbd standalone. \n"));
1291 DEBUGADD(0, ("You should start 'samba' instead, and it will control starting smbd if required\n"));
1295 /* ...NOTE... Log files are working from this point! */
1297 DEBUG(3,("loaded services\n"));
1302 if (!profile_setup(msg_ctx
, False
)) {
1303 DEBUG(0,("ERROR: failed to setup profiling\n"));
1306 if (profile_level
!= NULL
) {
1307 int pl
= atoi(profile_level
);
1308 struct server_id src
;
1310 DEBUG(1, ("setting profiling level: %s\n",profile_level
));
1312 set_profile_level(pl
, src
);
1316 if (!is_daemon
&& !is_a_socket(0)) {
1318 DEBUG(3, ("Standard input is not a socket, "
1319 "assuming -D option\n"));
1323 * Setting is_daemon here prevents us from eventually calling
1324 * the open_sockets_inetd()
1330 if (is_daemon
&& !interactive
) {
1331 DEBUG(3, ("Becoming a daemon.\n"));
1332 become_daemon(Fork
, no_process_group
, log_stdout
);
1335 set_my_unique_id(serverid_get_random_unique_id());
1339 * If we're interactive we want to set our own process group for
1340 * signal management.
1342 if (interactive
&& !no_process_group
)
1343 setpgid( (pid_t
)0, (pid_t
)0);
1346 if (!directory_exist(lp_lock_directory()))
1347 mkdir(lp_lock_directory(), 0755);
1349 if (!directory_exist(lp_pid_directory()))
1350 mkdir(lp_pid_directory(), 0755);
1353 pidfile_create(lp_pid_directory(), "smbd");
1355 status
= reinit_after_fork(msg_ctx
,
1358 if (!NT_STATUS_IS_OK(status
)) {
1359 DEBUG(0,("reinit_after_fork() failed\n"));
1365 * Do not initialize the parent-child-pipe before becoming a
1366 * daemon: this is used to detect a died parent in the child
1369 status
= init_before_fork();
1370 if (!NT_STATUS_IS_OK(status
)) {
1371 DEBUG(0, ("init_before_fork failed: %s\n", nt_errstr(status
)));
1376 parent
= talloc_zero(ev_ctx
, struct smbd_parent_context
);
1378 exit_server("talloc(struct smbd_parent_context) failed");
1380 parent
->interactive
= interactive
;
1381 parent
->ev_ctx
= ev_ctx
;
1382 parent
->msg_ctx
= msg_ctx
;
1385 se
= tevent_add_signal(parent
->ev_ctx
,
1388 smbd_parent_sig_term_handler
,
1391 exit_server("failed to setup SIGTERM handler");
1393 se
= tevent_add_signal(parent
->ev_ctx
,
1396 smbd_parent_sig_hup_handler
,
1399 exit_server("failed to setup SIGHUP handler");
1402 /* Setup all the TDB's - including CLEAR_IF_FIRST tdb's. */
1404 if (smbd_memcache() == NULL
) {
1408 memcache_set_global(smbd_memcache());
1410 /* Initialise the password backed before the global_sam_sid
1411 to ensure that we fetch from ldap before we make a domain sid up */
1413 if(!initialize_password_db(false, ev_ctx
))
1416 if (!secrets_init()) {
1417 DEBUG(0, ("ERROR: smbd can not open secrets.tdb\n"));
1421 if (lp_server_role() == ROLE_DOMAIN_BDC
|| lp_server_role() == ROLE_DOMAIN_PDC
) {
1422 struct loadparm_context
*lp_ctx
= loadparm_init_s3(NULL
, loadparm_s3_helpers());
1423 if (!open_schannel_session_store(NULL
, lp_ctx
)) {
1424 DEBUG(0,("ERROR: Samba cannot open schannel store for secured NETLOGON operations.\n"));
1427 TALLOC_FREE(lp_ctx
);
1430 if(!get_global_sam_sid()) {
1431 DEBUG(0,("ERROR: Samba cannot create a SAM SID.\n"));
1435 server_id
= messaging_server_id(msg_ctx
);
1436 status
= smbXsrv_version_global_init(&server_id
);
1437 if (!NT_STATUS_IS_OK(status
)) {
1441 status
= smbXsrv_session_global_init();
1442 if (!NT_STATUS_IS_OK(status
)) {
1446 status
= smbXsrv_tcon_global_init();
1447 if (!NT_STATUS_IS_OK(status
)) {
1451 if (!locking_init())
1454 if (!messaging_tdb_parent_init(ev_ctx
)) {
1458 if (!smbd_parent_notify_init(NULL
, msg_ctx
, ev_ctx
)) {
1462 if (!smbd_scavenger_init(NULL
, msg_ctx
, ev_ctx
)) {
1466 if (!serverid_parent_init(ev_ctx
)) {
1470 if (!W_ERROR_IS_OK(registry_init_full()))
1473 /* Open the share_info.tdb here, so we don't have to open
1474 after the fork on every single connection. This is a small
1475 performance improvment and reduces the total number of system
1477 if (!share_info_db_init()) {
1478 DEBUG(0,("ERROR: failed to load share info db.\n"));
1482 status
= init_system_session_info();
1483 if (!NT_STATUS_IS_OK(status
)) {
1484 DEBUG(1, ("ERROR: failed to setup system user info: %s.\n",
1485 nt_errstr(status
)));
1489 if (!init_guest_info()) {
1490 DEBUG(0,("ERROR: failed to setup guest info.\n"));
1494 if (!file_init_global()) {
1495 DEBUG(0, ("ERROR: file_init_global() failed\n"));
1498 status
= smbXsrv_open_global_init();
1499 if (!NT_STATUS_IS_OK(status
)) {
1503 /* This MUST be done before start_epmd() because otherwise
1504 * start_epmd() forks and races against dcesrv_ep_setup() to
1505 * call directory_create_or_exist() */
1506 if (!directory_create_or_exist(lp_ncalrpc_dir(), geteuid(), 0755)) {
1507 DEBUG(0, ("Failed to create pipe directory %s - %s\n",
1508 lp_ncalrpc_dir(), strerror(errno
)));
1512 np_dir
= talloc_asprintf(talloc_tos(), "%s/np", lp_ncalrpc_dir());
1514 DEBUG(0, ("%s: Out of memory\n", __location__
));
1518 if (!directory_create_or_exist_strict(np_dir
, geteuid(), 0700)) {
1519 DEBUG(0, ("Failed to create pipe directory %s - %s\n",
1520 np_dir
, strerror(errno
)));
1524 if (is_daemon
&& !interactive
) {
1525 if (rpc_epmapper_daemon() == RPC_DAEMON_FORK
) {
1526 start_epmd(ev_ctx
, msg_ctx
);
1530 if (!dcesrv_ep_setup(ev_ctx
, msg_ctx
)) {
1534 /* only start other daemons if we are running as a daemon
1535 * -- bad things will happen if smbd is launched via inetd
1536 * and we fork a copy of ourselves here */
1537 if (is_daemon
&& !interactive
) {
1539 if (rpc_lsasd_daemon() == RPC_DAEMON_FORK
) {
1540 start_lsasd(ev_ctx
, msg_ctx
);
1543 if (!lp__disable_spoolss() &&
1544 (rpc_spoolss_daemon() != RPC_DAEMON_DISABLED
)) {
1545 bool bgq
= lp_parm_bool(-1, "smbd", "backgroundqueue", true);
1547 if (!printing_subsystem_init(ev_ctx
, msg_ctx
, true, bgq
)) {
1551 } else if (!lp__disable_spoolss() &&
1552 (rpc_spoolss_daemon() != RPC_DAEMON_DISABLED
)) {
1553 if (!printing_subsystem_init(ev_ctx
, msg_ctx
, false, false)) {
1564 /* Started from inetd. fd 0 is the socket. */
1565 /* We will abort gracefully when the client or remote system
1569 /* close stdin, stdout (if not logging to it), but not stderr */
1570 close_low_fds(true, !debug_get_output_is_stdout(), false);
1577 smbd_setup_sig_chld_handler(parent
);
1579 smbd_process(ev_ctx
, msg_ctx
, sock
, true);
1581 exit_server_cleanly(NULL
);
1585 if (!open_sockets_smbd(parent
, ev_ctx
, msg_ctx
, ports
))
1586 exit_server("open_sockets_smbd() failed");
1588 /* do a printer update now that all messaging has been set up,
1589 * before we allow clients to start connecting */
1590 if (!lp__disable_spoolss() &&
1591 (rpc_spoolss_daemon() != RPC_DAEMON_DISABLED
)) {
1592 printing_subsystem_update(ev_ctx
, msg_ctx
, false);
1596 /* make sure we always have a valid stackframe */
1597 frame
= talloc_stackframe();
1600 /* if we are running in the foreground then look for
1601 EOF on stdin, and exit if it happens. This allows
1602 us to die if the parent process dies
1603 Only do this on a pipe or socket, no other device.
1606 if (fstat(0, &st
) != 0) {
1609 if (S_ISFIFO(st
.st_mode
) || S_ISSOCK(st
.st_mode
)) {
1610 tevent_add_fd(ev_ctx
,
1619 smbd_parent_loop(ev_ctx
, parent
);
1621 exit_server_cleanly(NULL
);