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) {
470 /* a child terminated uncleanly so tickle all
471 processes to see if they can grab any of the
474 DEBUG(3,(__location__ " Unclean shutdown of pid %u\n",
476 if (parent->cleanup_te == NULL) {
477 /* call the cleanup timer, but not too often */
478 int cleanup_time = lp_parm_int(-1, "smbd", "cleanuptime", 20);
479 parent->cleanup_te = tevent_add_timer(parent->ev_ctx,
481 timeval_current_ofs(cleanup_time, 0),
484 DEBUG(1,("Scheduled cleanup of brl and lock database after unclean shutdown\n"));
487 status = messaging_dgm_cleanup(parent->msg_ctx, pid);
488 DEBUG(10, ("%s: messaging_dgm_cleanup returned %s\n",
489 __func__, nt_errstr(status)));
492 if (!serverid_deregister(child_id)) {
493 DEBUG(1, ("Could not remove pid %d from serverid.tdb\n",
498 /****************************************************************************
499 Have we reached the process limit ?
500 ****************************************************************************/
502 static bool allowable_number_of_smbd_processes(struct smbd_parent_context *parent)
504 int max_processes = lp_max_smbd_processes();
509 return parent->num_children < max_processes;
512 static void smbd_sig_chld_handler(struct tevent_context *ev,
513 struct tevent_signal *se,
521 struct smbd_parent_context *parent =
522 talloc_get_type_abort(private_data,
523 struct smbd_parent_context);
525 while ((pid = sys_waitpid(-1, &status, WNOHANG)) > 0) {
526 bool unclean_shutdown = False;
528 /* If the child terminated normally, assume
529 it was an unclean shutdown unless the
532 if (WIFEXITED(status)) {
533 unclean_shutdown = WEXITSTATUS(status);
535 /* If the child terminated due to a signal
536 we always assume it was unclean.
538 if (WIFSIGNALED(status)) {
539 unclean_shutdown = True;
541 remove_child_pid(parent, pid, unclean_shutdown);
545 static void smbd_setup_sig_chld_handler(struct smbd_parent_context *parent)
547 struct tevent_signal *se;
549 se = tevent_add_signal(parent->ev_ctx,
550 parent, /* mem_ctx */
552 smbd_sig_chld_handler,
555 exit_server("failed to setup SIGCHLD handler");
559 static void smbd_open_socket_close_fn(struct tevent_context *ev,
560 struct tevent_fd *fde,
564 /* this might be the socket_wrapper swrap_close() */
568 static void smbd_accept_connection(struct tevent_context *ev,
569 struct tevent_fd *fde,
573 struct smbd_open_socket *s = talloc_get_type_abort(private_data,
574 struct smbd_open_socket);
575 struct messaging_context *msg_ctx = s->parent->msg_ctx;
576 struct sockaddr_storage addr;
577 socklen_t in_addrlen = sizeof(addr);
582 fd = accept(s->fd, (struct sockaddr *)(void *)&addr,&in_addrlen);
583 if (fd == -1 && errno == EINTR)
587 DEBUG(0,("accept: %s\n",
592 if (s->parent->interactive) {
593 reinit_after_fork(msg_ctx, ev, true);
594 smbd_process(ev, msg_ctx, fd, true);
595 exit_server_cleanly("end of interactive mode");
599 if (!allowable_number_of_smbd_processes(s->parent)) {
605 * Generate a unique id in the parent process so that we use
606 * the global random state in the parent.
608 unique_id = serverid_get_random_unique_id();
612 NTSTATUS status = NT_STATUS_OK;
618 * Can't use TALLOC_FREE here. Nulling out the argument to it
619 * would overwrite memory we've just freed.
621 talloc_free(s->parent);
624 set_my_unique_id(unique_id);
626 /* Stop zombies, the parent explicitly handles
627 * them, counting worker smbds. */
630 status = reinit_after_fork(msg_ctx,
633 if (!NT_STATUS_IS_OK(status)) {
634 if (NT_STATUS_EQUAL(status,
635 NT_STATUS_TOO_MANY_OPENED_FILES)) {
636 DEBUG(0,("child process cannot initialize "
637 "because too many files are open\n"));
640 if (lp_clustering() &&
641 NT_STATUS_EQUAL(status,
642 NT_STATUS_INTERNAL_DB_ERROR)) {
643 DEBUG(1,("child process cannot initialize "
644 "because connection to CTDB "
649 DEBUG(0,("reinit_after_fork() failed\n"));
650 smb_panic("reinit_after_fork() failed");
653 smbd_process(ev, msg_ctx, fd, false);
655 exit_server_cleanly("end of child");
660 DEBUG(0,("smbd_accept_connection: fork() failed: %s\n",
664 /* The parent doesn't need this socket */
667 /* Sun May 6 18:56:14 2001 ackley@cs.unm.edu:
668 Clear the closed fd info out of server_fd --
669 and more importantly, out of client_fd in
670 util_sock.c, to avoid a possible
671 getpeername failure if we reopen the logs
672 and use %I in the filename.
676 add_child_pid(s->parent, pid);
679 /* Force parent to check log size after
680 * spawning child. Fix from
681 * klausr@ITAP.Physik.Uni-Stuttgart.De. The
682 * parent smbd will log to logserver.smb. It
683 * writes only two messages for each child
684 * started/finished. But each child writes,
685 * say, 50 messages also in logserver.smb,
686 * begining with the debug_count of the
687 * parent, before the child opens its own log
688 * file logserver.client. In a worst case
689 * scenario the size of logserver.smb would be
690 * checked after about 50*50=2500 messages
693 force_check_log_size();
696 static bool smbd_open_one_socket(struct smbd_parent_context *parent,
697 struct tevent_context *ev_ctx,
698 const struct sockaddr_storage *ifss,
701 struct smbd_open_socket *s;
703 s = talloc(parent, struct smbd_open_socket);
709 s->fd = open_socket_in(SOCK_STREAM,
711 parent->sockets == NULL ? 0 : 2,
715 DEBUG(0,("smbd_open_once_socket: open_socket_in: "
716 "%s\n", strerror(errno)));
719 * We ignore an error here, as we've done before
724 /* ready to listen */
725 set_socket_options(s->fd, "SO_KEEPALIVE");
726 set_socket_options(s->fd, lp_socket_options());
728 /* Set server socket to
729 * non-blocking for the accept. */
730 set_blocking(s->fd, False);
732 if (listen(s->fd, SMBD_LISTEN_BACKLOG) == -1) {
733 DEBUG(0,("open_sockets_smbd: listen: "
734 "%s\n", strerror(errno)));
740 s->fde = tevent_add_fd(ev_ctx,
742 s->fd, TEVENT_FD_READ,
743 smbd_accept_connection,
746 DEBUG(0,("open_sockets_smbd: "
747 "tevent_add_fd: %s\n",
753 tevent_fd_set_close_fn(s->fde, smbd_open_socket_close_fn);
755 DLIST_ADD_END(parent->sockets, s, struct smbd_open_socket *);
760 /****************************************************************************
761 Open the socket communication.
762 ****************************************************************************/
764 static bool open_sockets_smbd(struct smbd_parent_context *parent,
765 struct tevent_context *ev_ctx,
766 struct messaging_context *msg_ctx,
767 const char *smb_ports)
769 int num_interfaces = iface_count();
772 unsigned dns_port = 0;
779 smbd_setup_sig_chld_handler(parent);
781 ports = lp_smb_ports();
783 /* use a reasonable default set of ports - listing on 445 and 139 */
785 ports = (const char **)str_list_make_v3(talloc_tos(), smb_ports, NULL);
788 for (j = 0; ports && ports[j]; j++) {
789 unsigned port = atoi(ports[j]);
791 if (port == 0 || port > 0xffff) {
792 exit_server_cleanly("Invalid port in the config or on "
793 "the commandline specified!");
797 if (lp_interfaces() && lp_bind_interfaces_only()) {
798 /* We have been given an interfaces line, and been
799 told to only bind to those interfaces. Create a
800 socket per interface and bind to only these.
803 /* Now open a listen socket for each of the
805 for(i = 0; i < num_interfaces; i++) {
806 const struct sockaddr_storage *ifss =
807 iface_n_sockaddr_storage(i);
809 DEBUG(0,("open_sockets_smbd: "
810 "interface %d has NULL IP address !\n",
815 for (j = 0; ports && ports[j]; j++) {
816 unsigned port = atoi(ports[j]);
818 /* Keep the first port for mDNS service
825 if (!smbd_open_one_socket(parent,
834 /* Just bind to 0.0.0.0 - accept connections
837 const char *sock_addr;
839 const char *sock_ptr;
842 sock_addr = "::,0.0.0.0";
844 sock_addr = "0.0.0.0";
847 for (sock_ptr=sock_addr;
848 next_token_talloc(talloc_tos(), &sock_ptr, &sock_tok, " \t,"); ) {
849 for (j = 0; ports && ports[j]; j++) {
850 struct sockaddr_storage ss;
851 unsigned port = atoi(ports[j]);
853 /* Keep the first port for mDNS service
860 /* open an incoming socket */
861 if (!interpret_string_addr(&ss, sock_tok,
862 AI_NUMERICHOST|AI_PASSIVE)) {
866 if (!smbd_open_one_socket(parent,
876 if (parent->sockets == NULL) {
877 DEBUG(0,("open_sockets_smbd: No "
878 "sockets available to bind to.\n"));
882 /* Setup the main smbd so that we can get messages. Note that
883 do this after starting listening. This is needed as when in
884 clustered mode, ctdb won't allow us to start doing database
885 operations until it has gone thru a full startup, which
886 includes checking to see that smbd is listening. */
888 if (!serverid_register(messaging_server_id(msg_ctx),
889 FLAG_MSG_GENERAL|FLAG_MSG_SMBD
890 |FLAG_MSG_PRINT_GENERAL
892 DEBUG(0, ("open_sockets_smbd: Failed to register "
893 "myself in serverid.tdb\n"));
897 /* Listen to messages */
899 messaging_register(msg_ctx, NULL, MSG_SHUTDOWN, msg_exit_server);
900 messaging_register(msg_ctx, ev_ctx, MSG_SMB_CONF_UPDATED,
901 smbd_parent_conf_updated);
902 messaging_register(msg_ctx, NULL, MSG_SMB_STAT_CACHE_DELETE,
903 smb_stat_cache_delete);
904 messaging_register(msg_ctx, NULL, MSG_DEBUG, smbd_msg_debug);
905 messaging_register(msg_ctx, ev_ctx, MSG_PRINTER_PCAP,
907 messaging_register(msg_ctx, NULL, MSG_SMB_BRL_VALIDATE,
909 messaging_register(msg_ctx, NULL, MSG_SMB_FORCE_TDIS,
910 smb_parent_force_tdis);
911 messaging_register(msg_ctx, NULL, MSG_SMB_KILL_CLIENT_IP,
912 smb_parent_kill_client_by_ip);
913 messaging_register(msg_ctx, NULL, MSG_SMB_TELL_NUM_CHILDREN,
914 smb_tell_num_children);
916 messaging_register(msg_ctx, NULL,
917 ID_CACHE_DELETE, smbd_parent_id_cache_delete);
918 messaging_register(msg_ctx, NULL,
919 ID_CACHE_KILL, smbd_parent_id_cache_kill);
921 if (lp_clustering()) {
922 ctdbd_register_reconfigure(messaging_ctdbd_connection());
926 messaging_register(msg_ctx, NULL, MSG_SMB_INJECT_FAULT,
930 if (lp_multicast_dns_register() && (dns_port != 0)) {
931 #ifdef WITH_DNSSD_SUPPORT
932 smbd_setup_mdns_registration(ev_ctx,
935 #ifdef WITH_AVAHI_SUPPORT
938 avahi_conn = avahi_start_register(ev_ctx,
941 if (avahi_conn == NULL) {
942 DEBUG(10, ("avahi_start_register failed\n"));
952 handle stdin becoming readable when we are in --foreground mode
954 static void smbd_stdin_handler(struct tevent_context *ev,
955 struct tevent_fd *fde,
960 if (read(0, &c, 1) != 1) {
961 /* we have reached EOF on stdin, which means the
962 parent has exited. Shutdown the server */
963 exit_server_cleanly("EOF on stdin");
967 static void smbd_parent_loop(struct tevent_context *ev_ctx,
968 struct smbd_parent_context *parent)
970 /* now accept incoming connections - forking a new process
971 for each incoming connection */
972 DEBUG(2,("waiting for connections\n"));
975 TALLOC_CTX *frame = talloc_stackframe();
977 ret = tevent_loop_once(ev_ctx);
979 exit_server_cleanly("tevent_loop_once() error");
985 /* NOTREACHED return True; */
989 /****************************************************************************
990 Initialise connect, service and file structs.
991 ****************************************************************************/
993 static bool init_structs(void )
996 * Set the machine NETBIOS name if not already
997 * set from the config file.
1003 if (!secrets_init())
1009 static void smbd_parent_sig_term_handler(struct tevent_context *ev,
1010 struct tevent_signal *se,
1016 exit_server_cleanly("termination signal");
1019 static void smbd_parent_sig_hup_handler(struct tevent_context *ev,
1020 struct tevent_signal *se,
1026 struct smbd_parent_context *parent =
1027 talloc_get_type_abort(private_data,
1028 struct smbd_parent_context);
1030 change_to_root_user();
1031 DEBUG(1,("parent: Reloading services after SIGHUP\n"));
1032 reload_services(NULL, NULL, false);
1034 printing_subsystem_update(parent->ev_ctx, parent->msg_ctx, true);
1037 /****************************************************************************
1039 ****************************************************************************/
1041 /* Declare prototype for build_options() to avoid having to run it through
1042 mkproto.h. Mixing $(builddir) and $(srcdir) source files in the current
1043 prototype generation system is too complicated. */
1045 extern void build_options(bool screen);
1047 int main(int argc,const char *argv[])
1049 /* shall I run as a daemon */
1050 bool is_daemon = false;
1051 bool interactive = false;
1053 bool no_process_group = false;
1054 bool log_stdout = false;
1056 char *profile_level = NULL;
1059 bool print_build_options = False;
1064 OPT_NO_PROCESS_GROUP,
1067 struct poptOption long_options[] = {
1069 {"daemon", 'D', POPT_ARG_NONE, NULL, OPT_DAEMON, "Become a daemon (default)" },
1070 {"interactive", 'i', POPT_ARG_NONE, NULL, OPT_INTERACTIVE, "Run interactive (not a daemon)"},
1071 {"foreground", 'F', POPT_ARG_NONE, NULL, OPT_FORK, "Run daemon in foreground (for daemontools, etc.)" },
1072 {"no-process-group", '\0', POPT_ARG_NONE, NULL, OPT_NO_PROCESS_GROUP, "Don't create a new process group" },
1073 {"log-stdout", 'S', POPT_ARG_NONE, NULL, OPT_LOG_STDOUT, "Log to stdout" },
1074 {"build-options", 'b', POPT_ARG_NONE, NULL, 'b', "Print build options" },
1075 {"port", 'p', POPT_ARG_STRING, &ports, 0, "Listen on the specified ports"},
1076 {"profiling-level", 'P', POPT_ARG_STRING, &profile_level, 0, "Set profiling level","PROFILE_LEVEL"},
1080 struct smbd_parent_context *parent = NULL;
1083 struct tevent_context *ev_ctx;
1084 struct messaging_context *msg_ctx;
1085 struct server_id server_id;
1086 struct tevent_signal *se;
1087 char *np_dir = NULL;
1088 static const struct smbd_shim smbd_shim_fns =
1090 .cancel_pending_lock_requests_by_fid = smbd_cancel_pending_lock_requests_by_fid,
1091 .send_stat_cache_delete_message = smbd_send_stat_cache_delete_message,
1092 .change_to_root_user = smbd_change_to_root_user,
1093 .become_authenticated_pipe_user = smbd_become_authenticated_pipe_user,
1094 .unbecome_authenticated_pipe_user = smbd_unbecome_authenticated_pipe_user,
1096 .contend_level2_oplocks_begin = smbd_contend_level2_oplocks_begin,
1097 .contend_level2_oplocks_end = smbd_contend_level2_oplocks_end,
1099 .become_root = smbd_become_root,
1100 .unbecome_root = smbd_unbecome_root,
1102 .exit_server = smbd_exit_server,
1103 .exit_server_cleanly = smbd_exit_server_cleanly,
1107 * Do this before any other talloc operation
1109 talloc_enable_null_tracking();
1110 frame = talloc_stackframe();
1112 setup_logging(argv[0], DEBUG_DEFAULT_STDOUT);
1116 set_smbd_shim(&smbd_shim_fns);
1118 smbd_init_globals();
1122 #ifdef HAVE_SET_AUTH_PARAMETERS
1123 set_auth_parameters(argc,argv);
1126 pc = poptGetContext("smbd", argc, argv, long_options, 0);
1127 while((opt = poptGetNextOpt(pc)) != -1) {
1132 case OPT_INTERACTIVE:
1138 case OPT_NO_PROCESS_GROUP:
1139 no_process_group = true;
1141 case OPT_LOG_STDOUT:
1145 print_build_options = True;
1148 d_fprintf(stderr, "\nInvalid option %s: %s\n\n",
1149 poptBadOption(pc, 0), poptStrerror(opt));
1150 poptPrintUsage(pc, stderr, 0);
1154 poptFreeContext(pc);
1162 setup_logging(argv[0], DEBUG_STDOUT);
1164 setup_logging(argv[0], DEBUG_FILE);
1167 if (print_build_options) {
1168 build_options(True); /* Display output to screen as well as debug */
1173 /* needed for SecureWare on SCO */
1177 set_remote_machine_name("smbd", False);
1179 if (interactive && (DEBUGLEVEL >= 9)) {
1180 talloc_enable_leak_report();
1183 if (log_stdout && Fork) {
1184 DEBUG(0,("ERROR: Can't log to stdout (-S) unless daemon is in foreground (-F) or interactive (-i)\n"));
1188 /* we want to re-seed early to prevent time delays causing
1189 client problems at a later date. (tridge) */
1190 generate_random_buffer(NULL, 0);
1192 /* get initial effective uid and gid */
1195 /* make absolutely sure we run as root - to handle cases where people
1196 are crazy enough to have it setuid */
1197 gain_root_privilege();
1198 gain_root_group_privilege();
1201 dump_core_setup("smbd", lp_logfile(talloc_tos()));
1203 /* we are never interested in SIGPIPE */
1204 BlockSignals(True,SIGPIPE);
1207 /* we are never interested in SIGFPE */
1208 BlockSignals(True,SIGFPE);
1211 #if defined(SIGUSR2)
1212 /* We are no longer interested in USR2 */
1213 BlockSignals(True,SIGUSR2);
1216 /* POSIX demands that signals are inherited. If the invoking process has
1217 * these signals masked, we will have problems, as we won't recieve them. */
1218 BlockSignals(False, SIGHUP);
1219 BlockSignals(False, SIGUSR1);
1220 BlockSignals(False, SIGTERM);
1222 /* Ensure we leave no zombies until we
1223 * correctly set up child handling below. */
1227 /* we want total control over the permissions on created files,
1228 so set our umask to 0 */
1233 DEBUG(0,("smbd version %s started.\n", samba_version_string()));
1234 DEBUGADD(0,("%s\n", COPYRIGHT_STARTUP_MESSAGE));
1236 DEBUG(2,("uid=%d gid=%d euid=%d egid=%d\n",
1237 (int)getuid(),(int)getgid(),(int)geteuid(),(int)getegid()));
1239 /* Output the build options to the debug log */
1240 build_options(False);
1242 if (sizeof(uint16) < 2 || sizeof(uint32) < 4) {
1243 DEBUG(0,("ERROR: Samba is not configured correctly for the word size on your machine\n"));
1247 if (!lp_load_initial_only(get_dyn_CONFIGFILE())) {
1248 DEBUG(0, ("error opening config file '%s'\n", get_dyn_CONFIGFILE()));
1252 if (!cluster_probe_ok()) {
1256 /* Init the security context and global current_user */
1260 * Initialize the event context. The event context needs to be
1261 * initialized before the messaging context, cause the messaging
1262 * context holds an event context.
1263 * FIXME: This should be s3_tevent_context_init()
1265 ev_ctx = server_event_context();
1266 if (ev_ctx == NULL) {
1271 * Init the messaging context
1272 * FIXME: This should only call messaging_init()
1274 msg_ctx = server_messaging_context();
1275 if (msg_ctx == NULL) {
1280 * Reloading of the printers will not work here as we don't have a
1281 * server info and rpc services set up. It will be called later.
1283 if (!reload_services(NULL, NULL, false)) {
1287 if (lp_server_role() == ROLE_ACTIVE_DIRECTORY_DC
1288 && !lp_parm_bool(-1, "server role check", "inhibit", false)) {
1289 DEBUG(0, ("server role = 'active directory domain controller' not compatible with running smbd standalone. \n"));
1290 DEBUGADD(0, ("You should start 'samba' instead, and it will control starting smbd if required\n"));
1294 /* ...NOTE... Log files are working from this point! */
1296 DEBUG(3,("loaded services\n"));
1301 if (!profile_setup(msg_ctx, False)) {
1302 DEBUG(0,("ERROR: failed to setup profiling\n"));
1305 if (profile_level != NULL) {
1306 int pl = atoi(profile_level);
1307 struct server_id src;
1309 DEBUG(1, ("setting profiling level: %s\n",profile_level));
1311 set_profile_level(pl, src);
1315 if (!is_daemon && !is_a_socket(0)) {
1317 DEBUG(3, ("Standard input is not a socket, "
1318 "assuming -D option\n"));
1322 * Setting is_daemon here prevents us from eventually calling
1323 * the open_sockets_inetd()
1329 if (is_daemon && !interactive) {
1330 DEBUG(3, ("Becoming a daemon.\n"));
1331 become_daemon(Fork, no_process_group, log_stdout);
1334 set_my_unique_id(serverid_get_random_unique_id());
1338 * If we're interactive we want to set our own process group for
1339 * signal management.
1341 if (interactive && !no_process_group)
1342 setpgid( (pid_t)0, (pid_t)0);
1345 if (!directory_exist(lp_lock_directory()))
1346 mkdir(lp_lock_directory(), 0755);
1348 if (!directory_exist(lp_pid_directory()))
1349 mkdir(lp_pid_directory(), 0755);
1352 pidfile_create(lp_pid_directory(), "smbd");
1354 status = reinit_after_fork(msg_ctx,
1357 if (!NT_STATUS_IS_OK(status)) {
1358 exit_daemon("reinit_after_fork() failed", map_errno_from_nt_status(status));
1363 * Do not initialize the parent-child-pipe before becoming a
1364 * daemon: this is used to detect a died parent in the child
1367 status = init_before_fork();
1368 if (!NT_STATUS_IS_OK(status)) {
1369 exit_daemon(nt_errstr(status), map_errno_from_nt_status(status));
1373 parent = talloc_zero(ev_ctx, struct smbd_parent_context);
1375 exit_server("talloc(struct smbd_parent_context) failed");
1377 parent->interactive = interactive;
1378 parent->ev_ctx = ev_ctx;
1379 parent->msg_ctx = msg_ctx;
1382 se = tevent_add_signal(parent->ev_ctx,
1385 smbd_parent_sig_term_handler,
1388 exit_server("failed to setup SIGTERM handler");
1390 se = tevent_add_signal(parent->ev_ctx,
1393 smbd_parent_sig_hup_handler,
1396 exit_server("failed to setup SIGHUP handler");
1399 /* Setup all the TDB's - including CLEAR_IF_FIRST tdb's. */
1401 if (smbd_memcache() == NULL) {
1402 exit_daemon("no memcache available", EACCES);
1405 memcache_set_global(smbd_memcache());
1407 /* Initialise the password backed before the global_sam_sid
1408 to ensure that we fetch from ldap before we make a domain sid up */
1410 if(!initialize_password_db(false, ev_ctx))
1413 if (!secrets_init()) {
1414 exit_daemon("smbd can not open secrets.tdb", EACCES);
1417 if (lp_server_role() == ROLE_DOMAIN_BDC || lp_server_role() == ROLE_DOMAIN_PDC) {
1418 struct loadparm_context *lp_ctx = loadparm_init_s3(NULL, loadparm_s3_helpers());
1419 if (!open_schannel_session_store(NULL, lp_ctx)) {
1420 exit_daemon("ERROR: Samba cannot open schannel store for secured NETLOGON operations.", EACCES);
1422 TALLOC_FREE(lp_ctx);
1425 if(!get_global_sam_sid()) {
1426 exit_daemon("Samba cannot create a SAM SID", EACCES);
1429 server_id = messaging_server_id(msg_ctx);
1430 status = smbXsrv_version_global_init(&server_id);
1431 if (!NT_STATUS_IS_OK(status)) {
1432 exit_daemon("Samba cannot init server context", EACCES);
1435 status = smbXsrv_session_global_init();
1436 if (!NT_STATUS_IS_OK(status)) {
1437 exit_daemon("Samba cannot init session context", EACCES);
1440 status = smbXsrv_tcon_global_init();
1441 if (!NT_STATUS_IS_OK(status)) {
1442 exit_daemon("Samba cannot init tcon context", EACCES);
1445 if (!locking_init())
1446 exit_daemon("Samba cannot init locking", EACCES);
1448 if (!smbd_parent_notify_init(NULL, msg_ctx, ev_ctx)) {
1449 exit_daemon("Samba cannot init notification", EACCES);
1452 if (!smbd_scavenger_init(NULL, msg_ctx, ev_ctx)) {
1453 exit_daemon("Samba cannot init scavenging", EACCES);
1456 if (!serverid_parent_init(ev_ctx)) {
1457 exit_daemon("Samba cannot init server id", EACCES);
1460 if (!W_ERROR_IS_OK(registry_init_full()))
1461 exit_daemon("Samba cannot init registry", EACCES);
1463 /* Open the share_info.tdb here, so we don't have to open
1464 after the fork on every single connection. This is a small
1465 performance improvment and reduces the total number of system
1467 if (!share_info_db_init()) {
1468 exit_daemon("ERROR: failed to load share info db.", EACCES);
1471 status = init_system_session_info();
1472 if (!NT_STATUS_IS_OK(status)) {
1473 DEBUG(1, ("ERROR: failed to setup system user info: %s.\n",
1474 nt_errstr(status)));
1478 if (!init_guest_info()) {
1479 DEBUG(0,("ERROR: failed to setup guest info.\n"));
1483 if (!file_init_global()) {
1484 DEBUG(0, ("ERROR: file_init_global() failed\n"));
1487 status = smbXsrv_open_global_init();
1488 if (!NT_STATUS_IS_OK(status)) {
1489 exit_daemon("Samba cannot init global open", map_errno_from_nt_status(status));
1492 /* This MUST be done before start_epmd() because otherwise
1493 * start_epmd() forks and races against dcesrv_ep_setup() to
1494 * call directory_create_or_exist() */
1495 if (!directory_create_or_exist(lp_ncalrpc_dir(), geteuid(), 0755)) {
1496 DEBUG(0, ("Failed to create pipe directory %s - %s\n",
1497 lp_ncalrpc_dir(), strerror(errno)));
1501 np_dir = talloc_asprintf(talloc_tos(), "%s/np", lp_ncalrpc_dir());
1503 DEBUG(0, ("%s: Out of memory\n", __location__));
1507 if (!directory_create_or_exist_strict(np_dir, geteuid(), 0700)) {
1508 DEBUG(0, ("Failed to create pipe directory %s - %s\n",
1509 np_dir, strerror(errno)));
1513 if (is_daemon && !interactive) {
1514 if (rpc_epmapper_daemon() == RPC_DAEMON_FORK) {
1515 start_epmd(ev_ctx, msg_ctx);
1519 if (!dcesrv_ep_setup(ev_ctx, msg_ctx)) {
1520 exit_daemon("Samba cannot setup ep pipe", EACCES);
1523 if (is_daemon && !interactive) {
1524 daemon_ready("smbd");
1527 /* only start other daemons if we are running as a daemon
1528 * -- bad things will happen if smbd is launched via inetd
1529 * and we fork a copy of ourselves here */
1530 if (is_daemon && !interactive) {
1532 if (rpc_lsasd_daemon() == RPC_DAEMON_FORK) {
1533 start_lsasd(ev_ctx, msg_ctx);
1536 if (!lp__disable_spoolss() &&
1537 (rpc_spoolss_daemon() != RPC_DAEMON_DISABLED)) {
1538 bool bgq = lp_parm_bool(-1, "smbd", "backgroundqueue", true);
1540 if (!printing_subsystem_init(ev_ctx, msg_ctx, true, bgq)) {
1541 exit_daemon("Samba failed to init printing subsystem", EACCES);
1544 } else if (!lp__disable_spoolss() &&
1545 (rpc_spoolss_daemon() != RPC_DAEMON_DISABLED)) {
1546 if (!printing_subsystem_init(ev_ctx, msg_ctx, false, false)) {
1557 /* Started from inetd. fd 0 is the socket. */
1558 /* We will abort gracefully when the client or remote system
1562 /* close stdin, stdout (if not logging to it), but not stderr */
1563 close_low_fds(true, !debug_get_output_is_stdout(), false);
1570 smbd_setup_sig_chld_handler(parent);
1572 smbd_process(ev_ctx, msg_ctx, sock, true);
1574 exit_server_cleanly(NULL);
1578 if (!open_sockets_smbd(parent, ev_ctx, msg_ctx, ports))
1579 exit_server("open_sockets_smbd() failed");
1581 /* do a printer update now that all messaging has been set up,
1582 * before we allow clients to start connecting */
1583 if (!lp__disable_spoolss() &&
1584 (rpc_spoolss_daemon() != RPC_DAEMON_DISABLED)) {
1585 printing_subsystem_update(ev_ctx, msg_ctx, false);
1589 /* make sure we always have a valid stackframe */
1590 frame = talloc_stackframe();
1593 /* if we are running in the foreground then look for
1594 EOF on stdin, and exit if it happens. This allows
1595 us to die if the parent process dies
1596 Only do this on a pipe or socket, no other device.
1599 if (fstat(0, &st) != 0) {
1602 if (S_ISFIFO(st.st_mode) || S_ISSOCK(st.st_mode)) {
1603 tevent_add_fd(ev_ctx,
1612 smbd_parent_loop(ev_ctx, parent);
1614 exit_server_cleanly(NULL);