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"
32 #include "../lib/util/memcache.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"
50 #include "locking/leases_db.h"
51 #include "../../ctdb/include/ctdb_protocol.h"
52 #include "smbd/notifyd/notifyd.h"
54 struct smbd_open_socket
;
55 struct smbd_child_pid
;
57 struct smbd_parent_context
{
60 struct tevent_context
*ev_ctx
;
61 struct messaging_context
*msg_ctx
;
63 /* the list of listening sockets */
64 struct smbd_open_socket
*sockets
;
66 /* the list of current child processes */
67 struct smbd_child_pid
*children
;
70 struct tevent_timer
*cleanup_te
;
73 struct smbd_open_socket
{
74 struct smbd_open_socket
*prev
, *next
;
75 struct smbd_parent_context
*parent
;
77 struct tevent_fd
*fde
;
80 struct smbd_child_pid
{
81 struct smbd_child_pid
*prev
, *next
;
85 extern void start_epmd(struct tevent_context
*ev_ctx
,
86 struct messaging_context
*msg_ctx
);
88 extern void start_lsasd(struct tevent_context
*ev_ctx
,
89 struct messaging_context
*msg_ctx
);
91 extern void start_fssd(struct tevent_context
*ev_ctx
,
92 struct messaging_context
*msg_ctx
);
94 extern void start_mdssd(struct tevent_context
*ev_ctx
,
95 struct messaging_context
*msg_ctx
);
98 extern int dcelogin_atmost_once
;
101 /*******************************************************************
102 What to do when smb.conf is updated.
103 ********************************************************************/
105 static void smbd_parent_conf_updated(struct messaging_context
*msg
,
108 struct server_id server_id
,
111 struct tevent_context
*ev_ctx
=
112 talloc_get_type_abort(private_data
, struct tevent_context
);
114 DEBUG(10,("smbd_parent_conf_updated: Got message saying smb.conf was "
115 "updated. Reloading.\n"));
116 change_to_root_user();
117 reload_services(NULL
, NULL
, false);
118 printing_subsystem_update(ev_ctx
, msg
, false);
121 /*******************************************************************
122 Delete a statcache entry.
123 ********************************************************************/
125 static void smb_stat_cache_delete(struct messaging_context
*msg
,
128 struct server_id server_id
,
131 const char *name
= (const char *)data
->data
;
132 DEBUG(10,("smb_stat_cache_delete: delete name %s\n", name
));
133 stat_cache_delete(name
);
136 /****************************************************************************
137 Send a SIGTERM to our process group.
138 *****************************************************************************/
140 static void killkids(void)
142 if(am_parent
) kill(0,SIGTERM
);
145 static void msg_exit_server(struct messaging_context
*msg
,
148 struct server_id server_id
,
151 DEBUG(3, ("got a SHUTDOWN message\n"));
152 exit_server_cleanly(NULL
);
156 static void msg_inject_fault(struct messaging_context
*msg
,
159 struct server_id src
,
163 struct server_id_buf tmp
;
165 if (data
->length
!= sizeof(sig
)) {
166 DEBUG(0, ("Process %s sent bogus signal injection request\n",
167 server_id_str_buf(src
, &tmp
)));
171 sig
= *(int *)data
->data
;
173 exit_server("internal error injected");
178 DEBUG(0, ("Process %s requested injection of signal %d (%s)\n",
179 server_id_str_buf(src
, &tmp
), sig
, strsignal(sig
)));
181 DEBUG(0, ("Process %s requested injection of signal %d\n",
182 server_id_str_buf(src
, &tmp
), sig
));
187 #endif /* DEVELOPER */
189 static NTSTATUS
messaging_send_to_children(struct messaging_context
*msg_ctx
,
190 uint32_t msg_type
, DATA_BLOB
* data
)
193 struct smbd_parent_context
*parent
= am_parent
;
194 struct smbd_child_pid
*child
;
196 if (parent
== NULL
) {
197 return NT_STATUS_INTERNAL_ERROR
;
200 for (child
= parent
->children
; child
!= NULL
; child
= child
->next
) {
201 status
= messaging_send(parent
->msg_ctx
,
202 pid_to_procid(child
->pid
),
204 if (!NT_STATUS_IS_OK(status
)) {
211 static void smb_parent_send_to_children(struct messaging_context
*ctx
,
214 struct server_id srv_id
,
217 messaging_send_to_children(ctx
, msg_type
, msg_data
);
221 * Parent smbd process sets its own debug level first and then
222 * sends a message to all the smbd children to adjust their debug
223 * level to that of the parent.
226 static void smbd_msg_debug(struct messaging_context
*msg_ctx
,
229 struct server_id server_id
,
232 debug_message(msg_ctx
, private_data
, MSG_DEBUG
, server_id
, data
);
234 messaging_send_to_children(msg_ctx
, MSG_DEBUG
, data
);
237 static void smbd_parent_id_cache_kill(struct messaging_context
*msg_ctx
,
240 struct server_id server_id
,
243 const char *msg
= (data
&& data
->data
)
244 ? (const char *)data
->data
: "<NULL>";
245 struct id_cache_ref id
;
247 if (!id_cache_ref_parse(msg
, &id
)) {
248 DEBUG(0, ("Invalid ?ID: %s\n", msg
));
252 id_cache_delete_from_cache(&id
);
254 messaging_send_to_children(msg_ctx
, msg_type
, data
);
257 static void smbd_parent_id_cache_delete(struct messaging_context
*ctx
,
260 struct server_id srv_id
,
263 id_cache_delete_message(ctx
, data
, msg_type
, srv_id
, msg_data
);
265 messaging_send_to_children(ctx
, msg_type
, msg_data
);
268 static int smbd_parent_ctdb_reconfigured(
269 uint32_t src_vnn
, uint32_t dst_vnn
, uint64_t dst_srvid
,
270 const uint8_t *msg
, size_t msglen
, void *private_data
)
272 struct messaging_context
*msg_ctx
= talloc_get_type_abort(
273 private_data
, struct messaging_context
);
275 DEBUG(10, ("Got %s message\n", (dst_srvid
== CTDB_SRVID_RECONFIGURE
)
276 ? "cluster reconfigure" : "SAMBA_NOTIFY"));
279 * Someone from the family died, validate our locks
282 messaging_send_buf(msg_ctx
, messaging_server_id(msg_ctx
),
283 MSG_SMB_BRL_VALIDATE
, NULL
, 0);
288 static void add_child_pid(struct smbd_parent_context
*parent
,
291 struct smbd_child_pid
*child
;
293 child
= talloc_zero(parent
, struct smbd_child_pid
);
295 DEBUG(0, ("Could not add child struct -- malloc failed\n"));
299 DLIST_ADD(parent
->children
, child
);
300 parent
->num_children
+= 1;
303 static void smb_tell_num_children(struct messaging_context
*ctx
, void *data
,
304 uint32_t msg_type
, struct server_id srv_id
,
307 uint8_t buf
[sizeof(uint32_t)];
310 SIVAL(buf
, 0, am_parent
->num_children
);
311 messaging_send_buf(ctx
, srv_id
, MSG_SMB_NUM_CHILDREN
,
316 static void notifyd_stopped(struct tevent_req
*req
);
318 static struct tevent_req
*notifyd_req(struct messaging_context
*msg_ctx
,
319 struct tevent_context
*ev
)
321 struct tevent_req
*req
;
322 sys_notify_watch_fn sys_notify_watch
= NULL
;
323 struct sys_notify_context
*sys_notify_ctx
= NULL
;
325 if (lp_kernel_change_notify()) {
328 if (lp_parm_bool(-1, "notify", "inotify", true)) {
329 sys_notify_watch
= inotify_watch
;
334 if (lp_parm_bool(-1, "notify", "fam",
335 (sys_notify_watch
== NULL
))) {
336 sys_notify_watch
= fam_watch
;
341 if (sys_notify_watch
!= NULL
) {
342 sys_notify_ctx
= sys_notify_context_create(msg_ctx
, ev
);
343 if (sys_notify_ctx
== NULL
) {
348 req
= notifyd_send(msg_ctx
, ev
, msg_ctx
,
349 messaging_ctdbd_connection(),
350 sys_notify_watch
, sys_notify_ctx
);
352 TALLOC_FREE(sys_notify_ctx
);
355 tevent_req_set_callback(req
, notifyd_stopped
, msg_ctx
);
360 static void notifyd_stopped(struct tevent_req
*req
)
364 ret
= notifyd_recv(req
);
366 DEBUG(1, ("notifyd stopped: %s\n", strerror(ret
)));
369 static bool smbd_notifyd_init(struct messaging_context
*msg
, bool interactive
)
371 struct tevent_context
*ev
= messaging_tevent_context(msg
);
372 struct tevent_req
*req
;
377 req
= notifyd_req(msg
, ev
);
378 return (req
!= NULL
);
383 DEBUG(1, ("%s: fork failed: %s\n", __func__
,
392 status
= reinit_after_fork(msg
, ev
, true);
393 if (!NT_STATUS_IS_OK(status
)) {
394 DEBUG(1, ("%s: reinit_after_fork failed: %s\n",
395 __func__
, nt_errstr(status
)));
399 req
= notifyd_req(msg
, ev
);
403 tevent_req_set_callback(req
, notifyd_stopped
, msg
);
404 return tevent_req_poll(req
, ev
);
408 at most every smbd:cleanuptime seconds (default 20), we scan the BRL
409 and locking database for entries to cleanup. As a side effect this
410 also cleans up dead entries in the connections database (due to the
411 traversal in message_send_all()
413 Using a timer for this prevents a flood of traversals when a large
414 number of clients disconnect at the same time (perhaps due to a
418 static void cleanup_timeout_fn(struct tevent_context
*event_ctx
,
419 struct tevent_timer
*te
,
423 struct smbd_parent_context
*parent
=
424 talloc_get_type_abort(private_data
,
425 struct smbd_parent_context
);
427 parent
->cleanup_te
= NULL
;
429 DEBUG(1,("Cleaning up brl and lock database after unclean shutdown\n"));
430 message_send_all(parent
->msg_ctx
, MSG_SMB_UNLOCK
, NULL
, 0, NULL
);
431 messaging_send_buf(parent
->msg_ctx
,
432 messaging_server_id(parent
->msg_ctx
),
433 MSG_SMB_BRL_VALIDATE
, NULL
, 0);
436 static void remove_child_pid(struct smbd_parent_context
*parent
,
438 bool unclean_shutdown
)
440 struct smbd_child_pid
*child
;
441 struct server_id child_id
;
444 child_id
= pid_to_procid(pid
);
446 ret
= messaging_cleanup(parent
->msg_ctx
, pid
);
448 if ((ret
!= 0) && (ret
!= ENOENT
)) {
449 DEBUG(10, ("%s: messaging_cleanup returned %s\n",
450 __func__
, strerror(ret
)));
453 smbprofile_cleanup(pid
);
455 for (child
= parent
->children
; child
!= NULL
; child
= child
->next
) {
456 if (child
->pid
== pid
) {
457 struct smbd_child_pid
*tmp
= child
;
458 DLIST_REMOVE(parent
->children
, child
);
460 parent
->num_children
-= 1;
466 /* not all forked child processes are added to the children list */
467 DEBUG(2, ("Could not find child %d -- ignoring\n", (int)pid
));
471 if (unclean_shutdown
) {
472 /* a child terminated uncleanly so tickle all
473 processes to see if they can grab any of the
476 DEBUG(3,(__location__
" Unclean shutdown of pid %u\n",
478 if (parent
->cleanup_te
== NULL
) {
479 /* call the cleanup timer, but not too often */
480 int cleanup_time
= lp_parm_int(-1, "smbd", "cleanuptime", 20);
481 parent
->cleanup_te
= tevent_add_timer(parent
->ev_ctx
,
483 timeval_current_ofs(cleanup_time
, 0),
486 DEBUG(1,("Scheduled cleanup of brl and lock database after unclean shutdown\n"));
490 if (!serverid_deregister(child_id
)) {
491 DEBUG(1, ("Could not remove pid %d from serverid.tdb\n",
496 /****************************************************************************
497 Have we reached the process limit ?
498 ****************************************************************************/
500 static bool allowable_number_of_smbd_processes(struct smbd_parent_context
*parent
)
502 int max_processes
= lp_max_smbd_processes();
507 return parent
->num_children
< max_processes
;
510 static void smbd_sig_chld_handler(struct tevent_context
*ev
,
511 struct tevent_signal
*se
,
519 struct smbd_parent_context
*parent
=
520 talloc_get_type_abort(private_data
,
521 struct smbd_parent_context
);
523 while ((pid
= sys_waitpid(-1, &status
, WNOHANG
)) > 0) {
524 bool unclean_shutdown
= False
;
526 /* If the child terminated normally, assume
527 it was an unclean shutdown unless the
530 if (WIFEXITED(status
)) {
531 unclean_shutdown
= WEXITSTATUS(status
);
533 /* If the child terminated due to a signal
534 we always assume it was unclean.
536 if (WIFSIGNALED(status
)) {
537 unclean_shutdown
= True
;
539 remove_child_pid(parent
, pid
, unclean_shutdown
);
543 static void smbd_setup_sig_chld_handler(struct smbd_parent_context
*parent
)
545 struct tevent_signal
*se
;
547 se
= tevent_add_signal(parent
->ev_ctx
,
548 parent
, /* mem_ctx */
550 smbd_sig_chld_handler
,
553 exit_server("failed to setup SIGCHLD handler");
557 static void smbd_open_socket_close_fn(struct tevent_context
*ev
,
558 struct tevent_fd
*fde
,
562 /* this might be the socket_wrapper swrap_close() */
566 static void smbd_accept_connection(struct tevent_context
*ev
,
567 struct tevent_fd
*fde
,
571 struct smbd_open_socket
*s
= talloc_get_type_abort(private_data
,
572 struct smbd_open_socket
);
573 struct messaging_context
*msg_ctx
= s
->parent
->msg_ctx
;
574 struct sockaddr_storage addr
;
575 socklen_t in_addrlen
= sizeof(addr
);
580 fd
= accept(s
->fd
, (struct sockaddr
*)(void *)&addr
,&in_addrlen
);
581 if (fd
== -1 && errno
== EINTR
)
585 DEBUG(0,("accept: %s\n",
590 if (s
->parent
->interactive
) {
591 reinit_after_fork(msg_ctx
, ev
, true);
592 smbd_process(ev
, msg_ctx
, fd
, true);
593 exit_server_cleanly("end of interactive mode");
597 if (!allowable_number_of_smbd_processes(s
->parent
)) {
603 * Generate a unique id in the parent process so that we use
604 * the global random state in the parent.
606 unique_id
= serverid_get_random_unique_id();
610 NTSTATUS status
= NT_STATUS_OK
;
613 * Can't use TALLOC_FREE here. Nulling out the argument to it
614 * would overwrite memory we've just freed.
616 talloc_free(s
->parent
);
619 set_my_unique_id(unique_id
);
621 /* Stop zombies, the parent explicitly handles
622 * them, counting worker smbds. */
625 status
= smbd_reinit_after_fork(msg_ctx
, ev
, true);
626 if (!NT_STATUS_IS_OK(status
)) {
627 if (NT_STATUS_EQUAL(status
,
628 NT_STATUS_TOO_MANY_OPENED_FILES
)) {
629 DEBUG(0,("child process cannot initialize "
630 "because too many files are open\n"));
633 if (lp_clustering() &&
634 NT_STATUS_EQUAL(status
,
635 NT_STATUS_INTERNAL_DB_ERROR
)) {
636 DEBUG(1,("child process cannot initialize "
637 "because connection to CTDB "
642 DEBUG(0,("reinit_after_fork() failed\n"));
643 smb_panic("reinit_after_fork() failed");
646 smbd_process(ev
, msg_ctx
, fd
, false);
648 exit_server_cleanly("end of child");
653 DEBUG(0,("smbd_accept_connection: fork() failed: %s\n",
657 /* The parent doesn't need this socket */
660 /* Sun May 6 18:56:14 2001 ackley@cs.unm.edu:
661 Clear the closed fd info out of server_fd --
662 and more importantly, out of client_fd in
663 util_sock.c, to avoid a possible
664 getpeername failure if we reopen the logs
665 and use %I in the filename.
669 add_child_pid(s
->parent
, pid
);
672 /* Force parent to check log size after
673 * spawning child. Fix from
674 * klausr@ITAP.Physik.Uni-Stuttgart.De. The
675 * parent smbd will log to logserver.smb. It
676 * writes only two messages for each child
677 * started/finished. But each child writes,
678 * say, 50 messages also in logserver.smb,
679 * begining with the debug_count of the
680 * parent, before the child opens its own log
681 * file logserver.client. In a worst case
682 * scenario the size of logserver.smb would be
683 * checked after about 50*50=2500 messages
686 force_check_log_size();
689 static bool smbd_open_one_socket(struct smbd_parent_context
*parent
,
690 struct tevent_context
*ev_ctx
,
691 const struct sockaddr_storage
*ifss
,
694 struct smbd_open_socket
*s
;
696 s
= talloc(parent
, struct smbd_open_socket
);
702 s
->fd
= open_socket_in(SOCK_STREAM
,
704 parent
->sockets
== NULL
? 0 : 2,
708 DEBUG(0,("smbd_open_once_socket: open_socket_in: "
709 "%s\n", strerror(errno
)));
712 * We ignore an error here, as we've done before
717 /* ready to listen */
718 set_socket_options(s
->fd
, "SO_KEEPALIVE");
719 set_socket_options(s
->fd
, lp_socket_options());
721 /* Set server socket to
722 * non-blocking for the accept. */
723 set_blocking(s
->fd
, False
);
725 if (listen(s
->fd
, SMBD_LISTEN_BACKLOG
) == -1) {
726 DEBUG(0,("open_sockets_smbd: listen: "
727 "%s\n", strerror(errno
)));
733 s
->fde
= tevent_add_fd(ev_ctx
,
735 s
->fd
, TEVENT_FD_READ
,
736 smbd_accept_connection
,
739 DEBUG(0,("open_sockets_smbd: "
740 "tevent_add_fd: %s\n",
746 tevent_fd_set_close_fn(s
->fde
, smbd_open_socket_close_fn
);
748 DLIST_ADD_END(parent
->sockets
, s
, struct smbd_open_socket
*);
753 /****************************************************************************
754 Open the socket communication.
755 ****************************************************************************/
757 static bool open_sockets_smbd(struct smbd_parent_context
*parent
,
758 struct tevent_context
*ev_ctx
,
759 struct messaging_context
*msg_ctx
,
760 const char *smb_ports
)
762 int num_interfaces
= iface_count();
765 unsigned dns_port
= 0;
772 smbd_setup_sig_chld_handler(parent
);
774 ports
= lp_smb_ports();
776 /* use a reasonable default set of ports - listing on 445 and 139 */
779 l
= str_list_make_v3(talloc_tos(), smb_ports
, NULL
);
780 ports
= discard_const_p(const char *, l
);
783 for (j
= 0; ports
&& ports
[j
]; j
++) {
784 unsigned port
= atoi(ports
[j
]);
786 if (port
== 0 || port
> 0xffff) {
787 exit_server_cleanly("Invalid port in the config or on "
788 "the commandline specified!");
792 if (lp_interfaces() && lp_bind_interfaces_only()) {
793 /* We have been given an interfaces line, and been
794 told to only bind to those interfaces. Create a
795 socket per interface and bind to only these.
798 /* Now open a listen socket for each of the
800 for(i
= 0; i
< num_interfaces
; i
++) {
801 const struct sockaddr_storage
*ifss
=
802 iface_n_sockaddr_storage(i
);
804 DEBUG(0,("open_sockets_smbd: "
805 "interface %d has NULL IP address !\n",
810 for (j
= 0; ports
&& ports
[j
]; j
++) {
811 unsigned port
= atoi(ports
[j
]);
813 /* Keep the first port for mDNS service
820 if (!smbd_open_one_socket(parent
,
829 /* Just bind to 0.0.0.0 - accept connections
832 const char *sock_addr
;
834 const char *sock_ptr
;
837 sock_addr
= "::,0.0.0.0";
839 sock_addr
= "0.0.0.0";
842 for (sock_ptr
=sock_addr
;
843 next_token_talloc(talloc_tos(), &sock_ptr
, &sock_tok
, " \t,"); ) {
844 for (j
= 0; ports
&& ports
[j
]; j
++) {
845 struct sockaddr_storage ss
;
846 unsigned port
= atoi(ports
[j
]);
848 /* Keep the first port for mDNS service
855 /* open an incoming socket */
856 if (!interpret_string_addr(&ss
, sock_tok
,
857 AI_NUMERICHOST
|AI_PASSIVE
)) {
862 * If we fail to open any sockets
863 * in this loop the parent-sockets == NULL
864 * case below will prevent us from starting.
867 (void)smbd_open_one_socket(parent
,
875 if (parent
->sockets
== NULL
) {
876 DEBUG(0,("open_sockets_smbd: No "
877 "sockets available to bind to.\n"));
881 /* Setup the main smbd so that we can get messages. Note that
882 do this after starting listening. This is needed as when in
883 clustered mode, ctdb won't allow us to start doing database
884 operations until it has gone thru a full startup, which
885 includes checking to see that smbd is listening. */
887 if (!serverid_register(messaging_server_id(msg_ctx
),
888 FLAG_MSG_GENERAL
|FLAG_MSG_SMBD
889 |FLAG_MSG_PRINT_GENERAL
891 DEBUG(0, ("open_sockets_smbd: Failed to register "
892 "myself in serverid.tdb\n"));
896 /* Listen to messages */
898 messaging_register(msg_ctx
, NULL
, MSG_SHUTDOWN
, msg_exit_server
);
899 messaging_register(msg_ctx
, ev_ctx
, MSG_SMB_CONF_UPDATED
,
900 smbd_parent_conf_updated
);
901 messaging_register(msg_ctx
, NULL
, MSG_SMB_STAT_CACHE_DELETE
,
902 smb_stat_cache_delete
);
903 messaging_register(msg_ctx
, NULL
, MSG_DEBUG
, smbd_msg_debug
);
904 messaging_register(msg_ctx
, NULL
, MSG_SMB_BRL_VALIDATE
,
906 messaging_register(msg_ctx
, NULL
, MSG_SMB_FORCE_TDIS
,
907 smb_parent_send_to_children
);
908 messaging_register(msg_ctx
, NULL
, MSG_SMB_KILL_CLIENT_IP
,
909 smb_parent_send_to_children
);
910 messaging_register(msg_ctx
, NULL
, MSG_SMB_TELL_NUM_CHILDREN
,
911 smb_tell_num_children
);
913 messaging_register(msg_ctx
, NULL
,
914 ID_CACHE_DELETE
, smbd_parent_id_cache_delete
);
915 messaging_register(msg_ctx
, NULL
,
916 ID_CACHE_KILL
, smbd_parent_id_cache_kill
);
918 if (lp_clustering()) {
919 struct ctdbd_connection
*conn
= messaging_ctdbd_connection();
921 register_with_ctdbd(conn
, CTDB_SRVID_RECONFIGURE
,
922 smbd_parent_ctdb_reconfigured
, msg_ctx
);
923 register_with_ctdbd(conn
, CTDB_SRVID_SAMBA_NOTIFY
,
924 smbd_parent_ctdb_reconfigured
, msg_ctx
);
928 messaging_register(msg_ctx
, NULL
, MSG_SMB_INJECT_FAULT
,
932 if (lp_multicast_dns_register() && (dns_port
!= 0)) {
933 #ifdef WITH_DNSSD_SUPPORT
934 smbd_setup_mdns_registration(ev_ctx
,
937 #ifdef WITH_AVAHI_SUPPORT
940 avahi_conn
= avahi_start_register(ev_ctx
,
943 if (avahi_conn
== NULL
) {
944 DEBUG(10, ("avahi_start_register failed\n"));
954 handle stdin becoming readable when we are in --foreground mode
956 static void smbd_stdin_handler(struct tevent_context
*ev
,
957 struct tevent_fd
*fde
,
962 if (read(0, &c
, 1) != 1) {
963 /* we have reached EOF on stdin, which means the
964 parent has exited. Shutdown the server */
965 exit_server_cleanly("EOF on stdin");
969 struct smbd_parent_tevent_trace_state
{
973 static void smbd_parent_tevent_trace_callback(enum tevent_trace_point point
,
976 struct smbd_parent_tevent_trace_state
*state
=
977 (struct smbd_parent_tevent_trace_state
*)private_data
;
980 case TEVENT_TRACE_BEFORE_WAIT
:
982 case TEVENT_TRACE_AFTER_WAIT
:
984 case TEVENT_TRACE_BEFORE_LOOP_ONCE
:
985 TALLOC_FREE(state
->frame
);
986 state
->frame
= talloc_stackframe();
988 case TEVENT_TRACE_AFTER_LOOP_ONCE
:
989 TALLOC_FREE(state
->frame
);
996 static void smbd_parent_loop(struct tevent_context
*ev_ctx
,
997 struct smbd_parent_context
*parent
)
999 struct smbd_parent_tevent_trace_state trace_state
= {
1004 tevent_set_trace_callback(ev_ctx
, smbd_parent_tevent_trace_callback
,
1007 /* now accept incoming connections - forking a new process
1008 for each incoming connection */
1009 DEBUG(2,("waiting for connections\n"));
1011 ret
= tevent_loop_wait(ev_ctx
);
1013 DEBUG(0, ("tevent_loop_wait failed: %d, %s, exiting\n",
1014 ret
, strerror(errno
)));
1017 TALLOC_FREE(trace_state
.frame
);
1019 /* NOTREACHED return True; */
1023 /****************************************************************************
1024 Initialise connect, service and file structs.
1025 ****************************************************************************/
1027 static bool init_structs(void )
1030 * Set the machine NETBIOS name if not already
1031 * set from the config file.
1037 if (!secrets_init())
1043 static void smbd_parent_sig_term_handler(struct tevent_context
*ev
,
1044 struct tevent_signal
*se
,
1050 exit_server_cleanly("termination signal");
1053 static void smbd_parent_sig_hup_handler(struct tevent_context
*ev
,
1054 struct tevent_signal
*se
,
1060 struct smbd_parent_context
*parent
=
1061 talloc_get_type_abort(private_data
,
1062 struct smbd_parent_context
);
1064 change_to_root_user();
1065 DEBUG(1,("parent: Reloading services after SIGHUP\n"));
1066 reload_services(NULL
, NULL
, false);
1068 printing_subsystem_update(parent
->ev_ctx
, parent
->msg_ctx
, true);
1071 /****************************************************************************
1073 ****************************************************************************/
1075 /* Declare prototype for build_options() to avoid having to run it through
1076 mkproto.h. Mixing $(builddir) and $(srcdir) source files in the current
1077 prototype generation system is too complicated. */
1079 extern void build_options(bool screen
);
1081 int main(int argc
,const char *argv
[])
1083 /* shall I run as a daemon */
1084 bool is_daemon
= false;
1085 bool interactive
= false;
1087 bool no_process_group
= false;
1088 bool log_stdout
= false;
1090 char *profile_level
= NULL
;
1093 bool print_build_options
= False
;
1098 OPT_NO_PROCESS_GROUP
,
1101 struct poptOption long_options
[] = {
1103 {"daemon", 'D', POPT_ARG_NONE
, NULL
, OPT_DAEMON
, "Become a daemon (default)" },
1104 {"interactive", 'i', POPT_ARG_NONE
, NULL
, OPT_INTERACTIVE
, "Run interactive (not a daemon)"},
1105 {"foreground", 'F', POPT_ARG_NONE
, NULL
, OPT_FORK
, "Run daemon in foreground (for daemontools, etc.)" },
1106 {"no-process-group", '\0', POPT_ARG_NONE
, NULL
, OPT_NO_PROCESS_GROUP
, "Don't create a new process group" },
1107 {"log-stdout", 'S', POPT_ARG_NONE
, NULL
, OPT_LOG_STDOUT
, "Log to stdout" },
1108 {"build-options", 'b', POPT_ARG_NONE
, NULL
, 'b', "Print build options" },
1109 {"port", 'p', POPT_ARG_STRING
, &ports
, 0, "Listen on the specified ports"},
1110 {"profiling-level", 'P', POPT_ARG_STRING
, &profile_level
, 0, "Set profiling level","PROFILE_LEVEL"},
1114 struct smbd_parent_context
*parent
= NULL
;
1117 struct tevent_context
*ev_ctx
;
1118 struct messaging_context
*msg_ctx
;
1119 struct server_id server_id
;
1120 struct tevent_signal
*se
;
1121 int profiling_level
;
1122 char *np_dir
= NULL
;
1123 static const struct smbd_shim smbd_shim_fns
=
1125 .cancel_pending_lock_requests_by_fid
= smbd_cancel_pending_lock_requests_by_fid
,
1126 .send_stat_cache_delete_message
= smbd_send_stat_cache_delete_message
,
1127 .change_to_root_user
= smbd_change_to_root_user
,
1128 .become_authenticated_pipe_user
= smbd_become_authenticated_pipe_user
,
1129 .unbecome_authenticated_pipe_user
= smbd_unbecome_authenticated_pipe_user
,
1131 .contend_level2_oplocks_begin
= smbd_contend_level2_oplocks_begin
,
1132 .contend_level2_oplocks_end
= smbd_contend_level2_oplocks_end
,
1134 .become_root
= smbd_become_root
,
1135 .unbecome_root
= smbd_unbecome_root
,
1137 .exit_server
= smbd_exit_server
,
1138 .exit_server_cleanly
= smbd_exit_server_cleanly
,
1142 * Do this before any other talloc operation
1144 talloc_enable_null_tracking();
1145 frame
= talloc_stackframe();
1147 setup_logging(argv
[0], DEBUG_DEFAULT_STDOUT
);
1151 set_smbd_shim(&smbd_shim_fns
);
1153 smbd_init_globals();
1157 #ifdef HAVE_SET_AUTH_PARAMETERS
1158 set_auth_parameters(argc
,argv
);
1161 pc
= poptGetContext("smbd", argc
, argv
, long_options
, 0);
1162 while((opt
= poptGetNextOpt(pc
)) != -1) {
1167 case OPT_INTERACTIVE
:
1173 case OPT_NO_PROCESS_GROUP
:
1174 no_process_group
= true;
1176 case OPT_LOG_STDOUT
:
1180 print_build_options
= True
;
1183 d_fprintf(stderr
, "\nInvalid option %s: %s\n\n",
1184 poptBadOption(pc
, 0), poptStrerror(opt
));
1185 poptPrintUsage(pc
, stderr
, 0);
1189 poptFreeContext(pc
);
1197 setup_logging(argv
[0], DEBUG_STDOUT
);
1199 setup_logging(argv
[0], DEBUG_FILE
);
1202 if (print_build_options
) {
1203 build_options(True
); /* Display output to screen as well as debug */
1208 /* needed for SecureWare on SCO */
1212 set_remote_machine_name("smbd", False
);
1214 if (interactive
&& (DEBUGLEVEL
>= 9)) {
1215 talloc_enable_leak_report();
1218 if (log_stdout
&& Fork
) {
1219 DEBUG(0,("ERROR: Can't log to stdout (-S) unless daemon is in foreground (-F) or interactive (-i)\n"));
1223 /* we want to re-seed early to prevent time delays causing
1224 client problems at a later date. (tridge) */
1225 generate_random_buffer(NULL
, 0);
1227 /* get initial effective uid and gid */
1230 /* make absolutely sure we run as root - to handle cases where people
1231 are crazy enough to have it setuid */
1232 gain_root_privilege();
1233 gain_root_group_privilege();
1236 dump_core_setup("smbd", lp_logfile(talloc_tos()));
1238 /* we are never interested in SIGPIPE */
1239 BlockSignals(True
,SIGPIPE
);
1242 /* we are never interested in SIGFPE */
1243 BlockSignals(True
,SIGFPE
);
1246 #if defined(SIGUSR2)
1247 /* We are no longer interested in USR2 */
1248 BlockSignals(True
,SIGUSR2
);
1251 /* POSIX demands that signals are inherited. If the invoking process has
1252 * these signals masked, we will have problems, as we won't recieve them. */
1253 BlockSignals(False
, SIGHUP
);
1254 BlockSignals(False
, SIGUSR1
);
1255 BlockSignals(False
, SIGTERM
);
1257 /* Ensure we leave no zombies until we
1258 * correctly set up child handling below. */
1262 /* we want total control over the permissions on created files,
1263 so set our umask to 0 */
1268 DEBUG(0,("smbd version %s started.\n", samba_version_string()));
1269 DEBUGADD(0,("%s\n", COPYRIGHT_STARTUP_MESSAGE
));
1271 DEBUG(2,("uid=%d gid=%d euid=%d egid=%d\n",
1272 (int)getuid(),(int)getgid(),(int)geteuid(),(int)getegid()));
1274 /* Output the build options to the debug log */
1275 build_options(False
);
1277 if (sizeof(uint16_t) < 2 || sizeof(uint32_t) < 4) {
1278 DEBUG(0,("ERROR: Samba is not configured correctly for the word size on your machine\n"));
1282 if (!lp_load_initial_only(get_dyn_CONFIGFILE())) {
1283 DEBUG(0, ("error opening config file '%s'\n", get_dyn_CONFIGFILE()));
1287 if (!cluster_probe_ok()) {
1291 /* Init the security context and global current_user */
1295 * Initialize the event context. The event context needs to be
1296 * initialized before the messaging context, cause the messaging
1297 * context holds an event context.
1298 * FIXME: This should be s3_tevent_context_init()
1300 ev_ctx
= server_event_context();
1301 if (ev_ctx
== NULL
) {
1306 * Init the messaging context
1307 * FIXME: This should only call messaging_init()
1309 msg_ctx
= server_messaging_context();
1310 if (msg_ctx
== NULL
) {
1315 * Reloading of the printers will not work here as we don't have a
1316 * server info and rpc services set up. It will be called later.
1318 if (!reload_services(NULL
, NULL
, false)) {
1322 if (lp_server_role() == ROLE_ACTIVE_DIRECTORY_DC
1323 && !lp_parm_bool(-1, "server role check", "inhibit", false)) {
1324 DEBUG(0, ("server role = 'active directory domain controller' not compatible with running smbd standalone. \n"));
1325 DEBUGADD(0, ("You should start 'samba' instead, and it will control starting smbd if required\n"));
1329 /* ...NOTE... Log files are working from this point! */
1331 DEBUG(3,("loaded services\n"));
1335 if (!profile_setup(msg_ctx
, False
)) {
1336 DEBUG(0,("ERROR: failed to setup profiling\n"));
1340 if (profile_level
!= NULL
) {
1341 profiling_level
= atoi(profile_level
);
1343 profiling_level
= lp_smbd_profiling_level();
1345 set_profile_level(profiling_level
, messaging_server_id(msg_ctx
));
1347 if (!is_daemon
&& !is_a_socket(0)) {
1349 DEBUG(3, ("Standard input is not a socket, "
1350 "assuming -D option\n"));
1354 * Setting is_daemon here prevents us from eventually calling
1355 * the open_sockets_inetd()
1361 if (is_daemon
&& !interactive
) {
1362 DEBUG(3, ("Becoming a daemon.\n"));
1363 become_daemon(Fork
, no_process_group
, log_stdout
);
1366 set_my_unique_id(serverid_get_random_unique_id());
1370 * If we're interactive we want to set our own process group for
1371 * signal management.
1373 if (interactive
&& !no_process_group
)
1374 setpgid( (pid_t
)0, (pid_t
)0);
1377 if (!directory_exist(lp_lock_directory()))
1378 mkdir(lp_lock_directory(), 0755);
1380 if (!directory_exist(lp_pid_directory()))
1381 mkdir(lp_pid_directory(), 0755);
1384 pidfile_create(lp_pid_directory(), "smbd");
1386 status
= reinit_after_fork(msg_ctx
,
1389 if (!NT_STATUS_IS_OK(status
)) {
1390 exit_daemon("reinit_after_fork() failed", map_errno_from_nt_status(status
));
1395 * Do not initialize the parent-child-pipe before becoming a
1396 * daemon: this is used to detect a died parent in the child
1399 status
= init_before_fork();
1400 if (!NT_STATUS_IS_OK(status
)) {
1401 exit_daemon(nt_errstr(status
), map_errno_from_nt_status(status
));
1405 parent
= talloc_zero(ev_ctx
, struct smbd_parent_context
);
1407 exit_server("talloc(struct smbd_parent_context) failed");
1409 parent
->interactive
= interactive
;
1410 parent
->ev_ctx
= ev_ctx
;
1411 parent
->msg_ctx
= msg_ctx
;
1414 se
= tevent_add_signal(parent
->ev_ctx
,
1417 smbd_parent_sig_term_handler
,
1420 exit_server("failed to setup SIGTERM handler");
1422 se
= tevent_add_signal(parent
->ev_ctx
,
1425 smbd_parent_sig_hup_handler
,
1428 exit_server("failed to setup SIGHUP handler");
1431 /* Setup all the TDB's - including CLEAR_IF_FIRST tdb's. */
1433 if (smbd_memcache() == NULL
) {
1434 exit_daemon("no memcache available", EACCES
);
1437 memcache_set_global(smbd_memcache());
1439 /* Initialise the password backed before the global_sam_sid
1440 to ensure that we fetch from ldap before we make a domain sid up */
1442 if(!initialize_password_db(false, ev_ctx
))
1445 if (!secrets_init()) {
1446 exit_daemon("smbd can not open secrets.tdb", EACCES
);
1449 if (lp_server_role() == ROLE_DOMAIN_BDC
|| lp_server_role() == ROLE_DOMAIN_PDC
) {
1450 struct loadparm_context
*lp_ctx
= loadparm_init_s3(NULL
, loadparm_s3_helpers());
1451 if (!open_schannel_session_store(NULL
, lp_ctx
)) {
1452 exit_daemon("ERROR: Samba cannot open schannel store for secured NETLOGON operations.", EACCES
);
1454 TALLOC_FREE(lp_ctx
);
1457 if(!get_global_sam_sid()) {
1458 exit_daemon("Samba cannot create a SAM SID", EACCES
);
1461 server_id
= messaging_server_id(msg_ctx
);
1462 status
= smbXsrv_version_global_init(&server_id
);
1463 if (!NT_STATUS_IS_OK(status
)) {
1464 exit_daemon("Samba cannot init server context", EACCES
);
1467 status
= smbXsrv_session_global_init();
1468 if (!NT_STATUS_IS_OK(status
)) {
1469 exit_daemon("Samba cannot init session context", EACCES
);
1472 status
= smbXsrv_tcon_global_init();
1473 if (!NT_STATUS_IS_OK(status
)) {
1474 exit_daemon("Samba cannot init tcon context", EACCES
);
1477 if (!locking_init())
1478 exit_daemon("Samba cannot init locking", EACCES
);
1480 if (!leases_db_init(false)) {
1481 exit_daemon("Samba cannot init leases", EACCES
);
1484 if (!smbd_notifyd_init(msg_ctx
, interactive
)) {
1485 exit_daemon("Samba cannot init notification", EACCES
);
1488 if (!messaging_parent_dgm_cleanup_init(msg_ctx
)) {
1492 if (!smbd_scavenger_init(NULL
, msg_ctx
, ev_ctx
)) {
1493 exit_daemon("Samba cannot init scavenging", EACCES
);
1496 if (!serverid_parent_init(ev_ctx
)) {
1497 exit_daemon("Samba cannot init server id", EACCES
);
1500 if (!W_ERROR_IS_OK(registry_init_full()))
1501 exit_daemon("Samba cannot init registry", EACCES
);
1503 /* Open the share_info.tdb here, so we don't have to open
1504 after the fork on every single connection. This is a small
1505 performance improvment and reduces the total number of system
1507 if (!share_info_db_init()) {
1508 exit_daemon("ERROR: failed to load share info db.", EACCES
);
1511 status
= init_system_session_info();
1512 if (!NT_STATUS_IS_OK(status
)) {
1513 DEBUG(1, ("ERROR: failed to setup system user info: %s.\n",
1514 nt_errstr(status
)));
1518 if (!init_guest_info()) {
1519 DEBUG(0,("ERROR: failed to setup guest info.\n"));
1523 if (!file_init_global()) {
1524 DEBUG(0, ("ERROR: file_init_global() failed\n"));
1527 status
= smbXsrv_open_global_init();
1528 if (!NT_STATUS_IS_OK(status
)) {
1529 exit_daemon("Samba cannot init global open", map_errno_from_nt_status(status
));
1532 /* This MUST be done before start_epmd() because otherwise
1533 * start_epmd() forks and races against dcesrv_ep_setup() to
1534 * call directory_create_or_exist() */
1535 if (!directory_create_or_exist(lp_ncalrpc_dir(), 0755)) {
1536 DEBUG(0, ("Failed to create pipe directory %s - %s\n",
1537 lp_ncalrpc_dir(), strerror(errno
)));
1541 np_dir
= talloc_asprintf(talloc_tos(), "%s/np", lp_ncalrpc_dir());
1543 DEBUG(0, ("%s: Out of memory\n", __location__
));
1547 if (!directory_create_or_exist_strict(np_dir
, geteuid(), 0700)) {
1548 DEBUG(0, ("Failed to create pipe directory %s - %s\n",
1549 np_dir
, strerror(errno
)));
1553 if (is_daemon
&& !interactive
) {
1554 if (rpc_epmapper_daemon() == RPC_DAEMON_FORK
) {
1555 start_epmd(ev_ctx
, msg_ctx
);
1559 if (!dcesrv_ep_setup(ev_ctx
, msg_ctx
)) {
1560 exit_daemon("Samba cannot setup ep pipe", EACCES
);
1563 if (is_daemon
&& !interactive
) {
1564 daemon_ready("smbd");
1567 /* only start other daemons if we are running as a daemon
1568 * -- bad things will happen if smbd is launched via inetd
1569 * and we fork a copy of ourselves here */
1570 if (is_daemon
&& !interactive
) {
1572 if (rpc_lsasd_daemon() == RPC_DAEMON_FORK
) {
1573 start_lsasd(ev_ctx
, msg_ctx
);
1576 if (rpc_fss_daemon() == RPC_DAEMON_FORK
) {
1577 start_fssd(ev_ctx
, msg_ctx
);
1580 if (!lp__disable_spoolss() &&
1581 (rpc_spoolss_daemon() != RPC_DAEMON_DISABLED
)) {
1582 bool bgq
= lp_parm_bool(-1, "smbd", "backgroundqueue", true);
1584 if (!printing_subsystem_init(ev_ctx
, msg_ctx
, true, bgq
)) {
1585 exit_daemon("Samba failed to init printing subsystem", EACCES
);
1589 #ifdef WITH_SPOTLIGHT
1590 if ((rpc_mdssvc_mode() == RPC_SERVICE_MODE_EXTERNAL
) &&
1591 (rpc_mdssd_daemon() == RPC_DAEMON_FORK
)) {
1592 start_mdssd(ev_ctx
, msg_ctx
);
1595 } else if (!lp__disable_spoolss() &&
1596 (rpc_spoolss_daemon() != RPC_DAEMON_DISABLED
)) {
1597 if (!printing_subsystem_init(ev_ctx
, msg_ctx
, false, false)) {
1608 /* Started from inetd. fd 0 is the socket. */
1609 /* We will abort gracefully when the client or remote system
1613 /* close stdin, stdout (if not logging to it), but not stderr */
1614 close_low_fds(true, !debug_get_output_is_stdout(), false);
1621 smbd_setup_sig_chld_handler(parent
);
1623 smbd_process(ev_ctx
, msg_ctx
, sock
, true);
1625 exit_server_cleanly(NULL
);
1629 if (!open_sockets_smbd(parent
, ev_ctx
, msg_ctx
, ports
))
1630 exit_server("open_sockets_smbd() failed");
1632 /* do a printer update now that all messaging has been set up,
1633 * before we allow clients to start connecting */
1634 if (!lp__disable_spoolss() &&
1635 (rpc_spoolss_daemon() != RPC_DAEMON_DISABLED
)) {
1636 printing_subsystem_update(ev_ctx
, msg_ctx
, false);
1640 /* make sure we always have a valid stackframe */
1641 frame
= talloc_stackframe();
1644 /* if we are running in the foreground then look for
1645 EOF on stdin, and exit if it happens. This allows
1646 us to die if the parent process dies
1647 Only do this on a pipe or socket, no other device.
1650 if (fstat(0, &st
) != 0) {
1653 if (S_ISFIFO(st
.st_mode
) || S_ISSOCK(st
.st_mode
)) {
1654 tevent_add_fd(ev_ctx
,
1663 smbd_parent_loop(ev_ctx
, parent
);
1665 exit_server_cleanly(NULL
);