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"));
488 * Ensure we flush any stored messages
489 * queued for the child process that
490 * terminated uncleanly.
492 messaging_cleanup_server(parent->msg_ctx, child_id);
494 status = messaging_dgm_cleanup(parent->msg_ctx, pid);
495 DEBUG(10, ("%s: messaging_dgm_cleanup returned %s\n",
496 __func__, nt_errstr(status)));
499 if (!serverid_deregister(child_id)) {
500 DEBUG(1, ("Could not remove pid %d from serverid.tdb\n",
505 /****************************************************************************
506 Have we reached the process limit ?
507 ****************************************************************************/
509 static bool allowable_number_of_smbd_processes(struct smbd_parent_context *parent)
511 int max_processes = lp_max_smbd_processes();
516 return parent->num_children < max_processes;
519 static void smbd_sig_chld_handler(struct tevent_context *ev,
520 struct tevent_signal *se,
528 struct smbd_parent_context *parent =
529 talloc_get_type_abort(private_data,
530 struct smbd_parent_context);
532 while ((pid = sys_waitpid(-1, &status, WNOHANG)) > 0) {
533 bool unclean_shutdown = False;
535 /* If the child terminated normally, assume
536 it was an unclean shutdown unless the
539 if (WIFEXITED(status)) {
540 unclean_shutdown = WEXITSTATUS(status);
542 /* If the child terminated due to a signal
543 we always assume it was unclean.
545 if (WIFSIGNALED(status)) {
546 unclean_shutdown = True;
548 remove_child_pid(parent, pid, unclean_shutdown);
552 static void smbd_setup_sig_chld_handler(struct smbd_parent_context *parent)
554 struct tevent_signal *se;
556 se = tevent_add_signal(parent->ev_ctx,
557 parent, /* mem_ctx */
559 smbd_sig_chld_handler,
562 exit_server("failed to setup SIGCHLD handler");
566 static void smbd_open_socket_close_fn(struct tevent_context *ev,
567 struct tevent_fd *fde,
571 /* this might be the socket_wrapper swrap_close() */
575 static void smbd_accept_connection(struct tevent_context *ev,
576 struct tevent_fd *fde,
580 struct smbd_open_socket *s = talloc_get_type_abort(private_data,
581 struct smbd_open_socket);
582 struct messaging_context *msg_ctx = s->parent->msg_ctx;
583 struct sockaddr_storage addr;
584 socklen_t in_addrlen = sizeof(addr);
589 fd = accept(s->fd, (struct sockaddr *)(void *)&addr,&in_addrlen);
590 if (fd == -1 && errno == EINTR)
594 DEBUG(0,("accept: %s\n",
599 if (s->parent->interactive) {
600 reinit_after_fork(msg_ctx, ev, true);
601 smbd_process(ev, msg_ctx, fd, true);
602 exit_server_cleanly("end of interactive mode");
606 if (!allowable_number_of_smbd_processes(s->parent)) {
612 * Generate a unique id in the parent process so that we use
613 * the global random state in the parent.
615 unique_id = serverid_get_random_unique_id();
619 NTSTATUS status = NT_STATUS_OK;
625 * Can't use TALLOC_FREE here. Nulling out the argument to it
626 * would overwrite memory we've just freed.
628 talloc_free(s->parent);
631 set_my_unique_id(unique_id);
633 /* Stop zombies, the parent explicitly handles
634 * them, counting worker smbds. */
637 status = reinit_after_fork(msg_ctx,
640 if (!NT_STATUS_IS_OK(status)) {
641 if (NT_STATUS_EQUAL(status,
642 NT_STATUS_TOO_MANY_OPENED_FILES)) {
643 DEBUG(0,("child process cannot initialize "
644 "because too many files are open\n"));
647 if (lp_clustering() &&
648 NT_STATUS_EQUAL(status,
649 NT_STATUS_INTERNAL_DB_ERROR)) {
650 DEBUG(1,("child process cannot initialize "
651 "because connection to CTDB "
656 DEBUG(0,("reinit_after_fork() failed\n"));
657 smb_panic("reinit_after_fork() failed");
660 smbd_process(ev, msg_ctx, fd, false);
662 exit_server_cleanly("end of child");
667 DEBUG(0,("smbd_accept_connection: fork() failed: %s\n",
671 /* The parent doesn't need this socket */
674 /* Sun May 6 18:56:14 2001 ackley@cs.unm.edu:
675 Clear the closed fd info out of server_fd --
676 and more importantly, out of client_fd in
677 util_sock.c, to avoid a possible
678 getpeername failure if we reopen the logs
679 and use %I in the filename.
683 add_child_pid(s->parent, pid);
686 /* Force parent to check log size after
687 * spawning child. Fix from
688 * klausr@ITAP.Physik.Uni-Stuttgart.De. The
689 * parent smbd will log to logserver.smb. It
690 * writes only two messages for each child
691 * started/finished. But each child writes,
692 * say, 50 messages also in logserver.smb,
693 * begining with the debug_count of the
694 * parent, before the child opens its own log
695 * file logserver.client. In a worst case
696 * scenario the size of logserver.smb would be
697 * checked after about 50*50=2500 messages
700 force_check_log_size();
703 static bool smbd_open_one_socket(struct smbd_parent_context *parent,
704 struct tevent_context *ev_ctx,
705 const struct sockaddr_storage *ifss,
708 struct smbd_open_socket *s;
710 s = talloc(parent, struct smbd_open_socket);
716 s->fd = open_socket_in(SOCK_STREAM,
718 parent->sockets == NULL ? 0 : 2,
722 DEBUG(0,("smbd_open_once_socket: open_socket_in: "
723 "%s\n", strerror(errno)));
726 * We ignore an error here, as we've done before
731 /* ready to listen */
732 set_socket_options(s->fd, "SO_KEEPALIVE");
733 set_socket_options(s->fd, lp_socket_options());
735 /* Set server socket to
736 * non-blocking for the accept. */
737 set_blocking(s->fd, False);
739 if (listen(s->fd, SMBD_LISTEN_BACKLOG) == -1) {
740 DEBUG(0,("open_sockets_smbd: listen: "
741 "%s\n", strerror(errno)));
747 s->fde = tevent_add_fd(ev_ctx,
749 s->fd, TEVENT_FD_READ,
750 smbd_accept_connection,
753 DEBUG(0,("open_sockets_smbd: "
754 "tevent_add_fd: %s\n",
760 tevent_fd_set_close_fn(s->fde, smbd_open_socket_close_fn);
762 DLIST_ADD_END(parent->sockets, s, struct smbd_open_socket *);
767 /****************************************************************************
768 Open the socket communication.
769 ****************************************************************************/
771 static bool open_sockets_smbd(struct smbd_parent_context *parent,
772 struct tevent_context *ev_ctx,
773 struct messaging_context *msg_ctx,
774 const char *smb_ports)
776 int num_interfaces = iface_count();
779 unsigned dns_port = 0;
786 smbd_setup_sig_chld_handler(parent);
788 ports = lp_smb_ports();
790 /* use a reasonable default set of ports - listing on 445 and 139 */
792 ports = (const char **)str_list_make_v3(talloc_tos(), smb_ports, NULL);
795 for (j = 0; ports && ports[j]; j++) {
796 unsigned port = atoi(ports[j]);
798 if (port == 0 || port > 0xffff) {
799 exit_server_cleanly("Invalid port in the config or on "
800 "the commandline specified!");
804 if (lp_interfaces() && lp_bind_interfaces_only()) {
805 /* We have been given an interfaces line, and been
806 told to only bind to those interfaces. Create a
807 socket per interface and bind to only these.
810 /* Now open a listen socket for each of the
812 for(i = 0; i < num_interfaces; i++) {
813 const struct sockaddr_storage *ifss =
814 iface_n_sockaddr_storage(i);
816 DEBUG(0,("open_sockets_smbd: "
817 "interface %d has NULL IP address !\n",
822 for (j = 0; ports && ports[j]; j++) {
823 unsigned port = atoi(ports[j]);
825 /* Keep the first port for mDNS service
832 if (!smbd_open_one_socket(parent,
841 /* Just bind to 0.0.0.0 - accept connections
844 const char *sock_addr;
846 const char *sock_ptr;
849 sock_addr = "::,0.0.0.0";
851 sock_addr = "0.0.0.0";
854 for (sock_ptr=sock_addr;
855 next_token_talloc(talloc_tos(), &sock_ptr, &sock_tok, " \t,"); ) {
856 for (j = 0; ports && ports[j]; j++) {
857 struct sockaddr_storage ss;
858 unsigned port = atoi(ports[j]);
860 /* Keep the first port for mDNS service
867 /* open an incoming socket */
868 if (!interpret_string_addr(&ss, sock_tok,
869 AI_NUMERICHOST|AI_PASSIVE)) {
873 if (!smbd_open_one_socket(parent,
883 if (parent->sockets == NULL) {
884 DEBUG(0,("open_sockets_smbd: No "
885 "sockets available to bind to.\n"));
889 /* Setup the main smbd so that we can get messages. Note that
890 do this after starting listening. This is needed as when in
891 clustered mode, ctdb won't allow us to start doing database
892 operations until it has gone thru a full startup, which
893 includes checking to see that smbd is listening. */
895 if (!serverid_register(messaging_server_id(msg_ctx),
896 FLAG_MSG_GENERAL|FLAG_MSG_SMBD
897 |FLAG_MSG_PRINT_GENERAL
899 DEBUG(0, ("open_sockets_smbd: Failed to register "
900 "myself in serverid.tdb\n"));
904 /* Listen to messages */
906 messaging_register(msg_ctx, NULL, MSG_SHUTDOWN, msg_exit_server);
907 messaging_register(msg_ctx, ev_ctx, MSG_SMB_CONF_UPDATED,
908 smbd_parent_conf_updated);
909 messaging_register(msg_ctx, NULL, MSG_SMB_STAT_CACHE_DELETE,
910 smb_stat_cache_delete);
911 messaging_register(msg_ctx, NULL, MSG_DEBUG, smbd_msg_debug);
912 messaging_register(msg_ctx, ev_ctx, MSG_PRINTER_PCAP,
914 messaging_register(msg_ctx, NULL, MSG_SMB_BRL_VALIDATE,
916 messaging_register(msg_ctx, NULL, MSG_SMB_FORCE_TDIS,
917 smb_parent_force_tdis);
918 messaging_register(msg_ctx, NULL, MSG_SMB_KILL_CLIENT_IP,
919 smb_parent_kill_client_by_ip);
920 messaging_register(msg_ctx, NULL, MSG_SMB_TELL_NUM_CHILDREN,
921 smb_tell_num_children);
923 messaging_register(msg_ctx, NULL,
924 ID_CACHE_DELETE, smbd_parent_id_cache_delete);
925 messaging_register(msg_ctx, NULL,
926 ID_CACHE_KILL, smbd_parent_id_cache_kill);
928 if (lp_clustering()) {
929 ctdbd_register_reconfigure(messaging_ctdbd_connection());
933 messaging_register(msg_ctx, NULL, MSG_SMB_INJECT_FAULT,
937 if (lp_multicast_dns_register() && (dns_port != 0)) {
938 #ifdef WITH_DNSSD_SUPPORT
939 smbd_setup_mdns_registration(ev_ctx,
942 #ifdef WITH_AVAHI_SUPPORT
945 avahi_conn = avahi_start_register(ev_ctx,
948 if (avahi_conn == NULL) {
949 DEBUG(10, ("avahi_start_register failed\n"));
959 handle stdin becoming readable when we are in --foreground mode
961 static void smbd_stdin_handler(struct tevent_context *ev,
962 struct tevent_fd *fde,
967 if (read(0, &c, 1) != 1) {
968 /* we have reached EOF on stdin, which means the
969 parent has exited. Shutdown the server */
970 exit_server_cleanly("EOF on stdin");
974 static void smbd_parent_loop(struct tevent_context *ev_ctx,
975 struct smbd_parent_context *parent)
977 /* now accept incoming connections - forking a new process
978 for each incoming connection */
979 DEBUG(2,("waiting for connections\n"));
982 TALLOC_CTX *frame = talloc_stackframe();
984 ret = tevent_loop_once(ev_ctx);
986 exit_server_cleanly("tevent_loop_once() error");
992 /* NOTREACHED return True; */
996 /****************************************************************************
997 Initialise connect, service and file structs.
998 ****************************************************************************/
1000 static bool init_structs(void )
1003 * Set the machine NETBIOS name if not already
1004 * set from the config file.
1010 if (!secrets_init())
1016 static void smbd_parent_sig_term_handler(struct tevent_context *ev,
1017 struct tevent_signal *se,
1023 exit_server_cleanly("termination signal");
1026 static void smbd_parent_sig_hup_handler(struct tevent_context *ev,
1027 struct tevent_signal *se,
1033 struct smbd_parent_context *parent =
1034 talloc_get_type_abort(private_data,
1035 struct smbd_parent_context);
1037 change_to_root_user();
1038 DEBUG(1,("parent: Reloading services after SIGHUP\n"));
1039 reload_services(NULL, NULL, false);
1041 printing_subsystem_update(parent->ev_ctx, parent->msg_ctx, true);
1044 /****************************************************************************
1046 ****************************************************************************/
1048 /* Declare prototype for build_options() to avoid having to run it through
1049 mkproto.h. Mixing $(builddir) and $(srcdir) source files in the current
1050 prototype generation system is too complicated. */
1052 extern void build_options(bool screen);
1054 int main(int argc,const char *argv[])
1056 /* shall I run as a daemon */
1057 bool is_daemon = false;
1058 bool interactive = false;
1060 bool no_process_group = false;
1061 bool log_stdout = false;
1063 char *profile_level = NULL;
1066 bool print_build_options = False;
1071 OPT_NO_PROCESS_GROUP,
1074 struct poptOption long_options[] = {
1076 {"daemon", 'D', POPT_ARG_NONE, NULL, OPT_DAEMON, "Become a daemon (default)" },
1077 {"interactive", 'i', POPT_ARG_NONE, NULL, OPT_INTERACTIVE, "Run interactive (not a daemon)"},
1078 {"foreground", 'F', POPT_ARG_NONE, NULL, OPT_FORK, "Run daemon in foreground (for daemontools, etc.)" },
1079 {"no-process-group", '\0', POPT_ARG_NONE, NULL, OPT_NO_PROCESS_GROUP, "Don't create a new process group" },
1080 {"log-stdout", 'S', POPT_ARG_NONE, NULL, OPT_LOG_STDOUT, "Log to stdout" },
1081 {"build-options", 'b', POPT_ARG_NONE, NULL, 'b', "Print build options" },
1082 {"port", 'p', POPT_ARG_STRING, &ports, 0, "Listen on the specified ports"},
1083 {"profiling-level", 'P', POPT_ARG_STRING, &profile_level, 0, "Set profiling level","PROFILE_LEVEL"},
1087 struct smbd_parent_context *parent = NULL;
1090 struct tevent_context *ev_ctx;
1091 struct messaging_context *msg_ctx;
1092 struct server_id server_id;
1093 struct tevent_signal *se;
1094 char *np_dir = NULL;
1095 static const struct smbd_shim smbd_shim_fns =
1097 .cancel_pending_lock_requests_by_fid = smbd_cancel_pending_lock_requests_by_fid,
1098 .send_stat_cache_delete_message = smbd_send_stat_cache_delete_message,
1099 .change_to_root_user = smbd_change_to_root_user,
1100 .become_authenticated_pipe_user = smbd_become_authenticated_pipe_user,
1101 .unbecome_authenticated_pipe_user = smbd_unbecome_authenticated_pipe_user,
1103 .contend_level2_oplocks_begin = smbd_contend_level2_oplocks_begin,
1104 .contend_level2_oplocks_end = smbd_contend_level2_oplocks_end,
1106 .become_root = smbd_become_root,
1107 .unbecome_root = smbd_unbecome_root,
1109 .exit_server = smbd_exit_server,
1110 .exit_server_cleanly = smbd_exit_server_cleanly,
1114 * Do this before any other talloc operation
1116 talloc_enable_null_tracking();
1117 frame = talloc_stackframe();
1119 setup_logging(argv[0], DEBUG_DEFAULT_STDOUT);
1123 set_smbd_shim(&smbd_shim_fns);
1125 smbd_init_globals();
1129 #ifdef HAVE_SET_AUTH_PARAMETERS
1130 set_auth_parameters(argc,argv);
1133 pc = poptGetContext("smbd", argc, argv, long_options, 0);
1134 while((opt = poptGetNextOpt(pc)) != -1) {
1139 case OPT_INTERACTIVE:
1145 case OPT_NO_PROCESS_GROUP:
1146 no_process_group = true;
1148 case OPT_LOG_STDOUT:
1152 print_build_options = True;
1155 d_fprintf(stderr, "\nInvalid option %s: %s\n\n",
1156 poptBadOption(pc, 0), poptStrerror(opt));
1157 poptPrintUsage(pc, stderr, 0);
1161 poptFreeContext(pc);
1169 setup_logging(argv[0], DEBUG_STDOUT);
1171 setup_logging(argv[0], DEBUG_FILE);
1174 if (print_build_options) {
1175 build_options(True); /* Display output to screen as well as debug */
1180 /* needed for SecureWare on SCO */
1184 set_remote_machine_name("smbd", False);
1186 if (interactive && (DEBUGLEVEL >= 9)) {
1187 talloc_enable_leak_report();
1190 if (log_stdout && Fork) {
1191 DEBUG(0,("ERROR: Can't log to stdout (-S) unless daemon is in foreground (-F) or interactive (-i)\n"));
1195 /* we want to re-seed early to prevent time delays causing
1196 client problems at a later date. (tridge) */
1197 generate_random_buffer(NULL, 0);
1199 /* get initial effective uid and gid */
1202 /* make absolutely sure we run as root - to handle cases where people
1203 are crazy enough to have it setuid */
1204 gain_root_privilege();
1205 gain_root_group_privilege();
1208 dump_core_setup("smbd", lp_logfile(talloc_tos()));
1210 /* we are never interested in SIGPIPE */
1211 BlockSignals(True,SIGPIPE);
1214 /* we are never interested in SIGFPE */
1215 BlockSignals(True,SIGFPE);
1218 #if defined(SIGUSR2)
1219 /* We are no longer interested in USR2 */
1220 BlockSignals(True,SIGUSR2);
1223 /* POSIX demands that signals are inherited. If the invoking process has
1224 * these signals masked, we will have problems, as we won't recieve them. */
1225 BlockSignals(False, SIGHUP);
1226 BlockSignals(False, SIGUSR1);
1227 BlockSignals(False, SIGTERM);
1229 /* Ensure we leave no zombies until we
1230 * correctly set up child handling below. */
1234 /* we want total control over the permissions on created files,
1235 so set our umask to 0 */
1240 DEBUG(0,("smbd version %s started.\n", samba_version_string()));
1241 DEBUGADD(0,("%s\n", COPYRIGHT_STARTUP_MESSAGE));
1243 DEBUG(2,("uid=%d gid=%d euid=%d egid=%d\n",
1244 (int)getuid(),(int)getgid(),(int)geteuid(),(int)getegid()));
1246 /* Output the build options to the debug log */
1247 build_options(False);
1249 if (sizeof(uint16) < 2 || sizeof(uint32) < 4) {
1250 DEBUG(0,("ERROR: Samba is not configured correctly for the word size on your machine\n"));
1254 if (!lp_load_initial_only(get_dyn_CONFIGFILE())) {
1255 DEBUG(0, ("error opening config file '%s'\n", get_dyn_CONFIGFILE()));
1259 if (!cluster_probe_ok()) {
1263 /* Init the security context and global current_user */
1267 * Initialize the event context. The event context needs to be
1268 * initialized before the messaging context, cause the messaging
1269 * context holds an event context.
1270 * FIXME: This should be s3_tevent_context_init()
1272 ev_ctx = server_event_context();
1273 if (ev_ctx == NULL) {
1278 * Init the messaging context
1279 * FIXME: This should only call messaging_init()
1281 msg_ctx = server_messaging_context();
1282 if (msg_ctx == NULL) {
1287 * Reloading of the printers will not work here as we don't have a
1288 * server info and rpc services set up. It will be called later.
1290 if (!reload_services(NULL, NULL, false)) {
1294 if (lp_server_role() == ROLE_ACTIVE_DIRECTORY_DC
1295 && !lp_parm_bool(-1, "server role check", "inhibit", false)) {
1296 DEBUG(0, ("server role = 'active directory domain controller' not compatible with running smbd standalone. \n"));
1297 DEBUGADD(0, ("You should start 'samba' instead, and it will control starting smbd if required\n"));
1301 /* ...NOTE... Log files are working from this point! */
1303 DEBUG(3,("loaded services\n"));
1308 if (!profile_setup(msg_ctx, False)) {
1309 DEBUG(0,("ERROR: failed to setup profiling\n"));
1312 if (profile_level != NULL) {
1313 int pl = atoi(profile_level);
1314 struct server_id src;
1316 DEBUG(1, ("setting profiling level: %s\n",profile_level));
1318 set_profile_level(pl, src);
1322 if (!is_daemon && !is_a_socket(0)) {
1324 DEBUG(3, ("Standard input is not a socket, "
1325 "assuming -D option\n"));
1329 * Setting is_daemon here prevents us from eventually calling
1330 * the open_sockets_inetd()
1336 if (is_daemon && !interactive) {
1337 DEBUG(3, ("Becoming a daemon.\n"));
1338 become_daemon(Fork, no_process_group, log_stdout);
1341 set_my_unique_id(serverid_get_random_unique_id());
1345 * If we're interactive we want to set our own process group for
1346 * signal management.
1348 if (interactive && !no_process_group)
1349 setpgid( (pid_t)0, (pid_t)0);
1352 if (!directory_exist(lp_lock_directory()))
1353 mkdir(lp_lock_directory(), 0755);
1355 if (!directory_exist(lp_pid_directory()))
1356 mkdir(lp_pid_directory(), 0755);
1359 pidfile_create(lp_pid_directory(), "smbd");
1361 status = reinit_after_fork(msg_ctx,
1364 if (!NT_STATUS_IS_OK(status)) {
1365 exit_daemon("reinit_after_fork() failed", map_errno_from_nt_status(status));
1370 * Do not initialize the parent-child-pipe before becoming a
1371 * daemon: this is used to detect a died parent in the child
1374 status = init_before_fork();
1375 if (!NT_STATUS_IS_OK(status)) {
1376 exit_daemon(nt_errstr(status), map_errno_from_nt_status(status));
1380 parent = talloc_zero(ev_ctx, struct smbd_parent_context);
1382 exit_server("talloc(struct smbd_parent_context) failed");
1384 parent->interactive = interactive;
1385 parent->ev_ctx = ev_ctx;
1386 parent->msg_ctx = msg_ctx;
1389 se = tevent_add_signal(parent->ev_ctx,
1392 smbd_parent_sig_term_handler,
1395 exit_server("failed to setup SIGTERM handler");
1397 se = tevent_add_signal(parent->ev_ctx,
1400 smbd_parent_sig_hup_handler,
1403 exit_server("failed to setup SIGHUP handler");
1406 /* Setup all the TDB's - including CLEAR_IF_FIRST tdb's. */
1408 if (smbd_memcache() == NULL) {
1409 exit_daemon("no memcache available", EACCES);
1412 memcache_set_global(smbd_memcache());
1414 /* Initialise the password backed before the global_sam_sid
1415 to ensure that we fetch from ldap before we make a domain sid up */
1417 if(!initialize_password_db(false, ev_ctx))
1420 if (!secrets_init()) {
1421 exit_daemon("smbd can not open secrets.tdb", EACCES);
1424 if (lp_server_role() == ROLE_DOMAIN_BDC || lp_server_role() == ROLE_DOMAIN_PDC) {
1425 struct loadparm_context *lp_ctx = loadparm_init_s3(NULL, loadparm_s3_helpers());
1426 if (!open_schannel_session_store(NULL, lp_ctx)) {
1427 exit_daemon("ERROR: Samba cannot open schannel store for secured NETLOGON operations.", EACCES);
1429 TALLOC_FREE(lp_ctx);
1432 if(!get_global_sam_sid()) {
1433 exit_daemon("Samba cannot create a SAM SID", EACCES);
1436 server_id = messaging_server_id(msg_ctx);
1437 status = smbXsrv_version_global_init(&server_id);
1438 if (!NT_STATUS_IS_OK(status)) {
1439 exit_daemon("Samba cannot init server context", EACCES);
1442 status = smbXsrv_session_global_init();
1443 if (!NT_STATUS_IS_OK(status)) {
1444 exit_daemon("Samba cannot init session context", EACCES);
1447 status = smbXsrv_tcon_global_init();
1448 if (!NT_STATUS_IS_OK(status)) {
1449 exit_daemon("Samba cannot init tcon context", EACCES);
1452 if (!locking_init())
1453 exit_daemon("Samba cannot init locking", EACCES);
1455 if (!messaging_tdb_parent_init(ev_ctx)) {
1456 exit_daemon("Samba cannot init TDB messaging", EACCES);
1459 if (!smbd_parent_notify_init(NULL, msg_ctx, ev_ctx)) {
1460 exit_daemon("Samba cannot init notification", EACCES);
1463 if (!smbd_scavenger_init(NULL, msg_ctx, ev_ctx)) {
1464 exit_daemon("Samba cannot init scavenging", EACCES);
1467 if (!serverid_parent_init(ev_ctx)) {
1468 exit_daemon("Samba cannot init server id", EACCES);
1471 if (!W_ERROR_IS_OK(registry_init_full()))
1472 exit_daemon("Samba cannot init registry", EACCES);
1474 /* Open the share_info.tdb here, so we don't have to open
1475 after the fork on every single connection. This is a small
1476 performance improvment and reduces the total number of system
1478 if (!share_info_db_init()) {
1479 exit_daemon("ERROR: failed to load share info db.", EACCES);
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)) {
1500 exit_daemon("Samba cannot init global open", map_errno_from_nt_status(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)) {
1531 exit_daemon("Samba cannot setup ep pipe", EACCES);
1534 if (is_daemon && !interactive) {
1535 daemon_ready("smbd");
1538 /* only start other daemons if we are running as a daemon
1539 * -- bad things will happen if smbd is launched via inetd
1540 * and we fork a copy of ourselves here */
1541 if (is_daemon && !interactive) {
1543 if (rpc_lsasd_daemon() == RPC_DAEMON_FORK) {
1544 start_lsasd(ev_ctx, msg_ctx);
1547 if (!lp__disable_spoolss() &&
1548 (rpc_spoolss_daemon() != RPC_DAEMON_DISABLED)) {
1549 bool bgq = lp_parm_bool(-1, "smbd", "backgroundqueue", true);
1551 if (!printing_subsystem_init(ev_ctx, msg_ctx, true, bgq)) {
1552 exit_daemon("Samba failed to init printing subsystem", EACCES);
1555 } else if (!lp__disable_spoolss() &&
1556 (rpc_spoolss_daemon() != RPC_DAEMON_DISABLED)) {
1557 if (!printing_subsystem_init(ev_ctx, msg_ctx, false, false)) {
1568 /* Started from inetd. fd 0 is the socket. */
1569 /* We will abort gracefully when the client or remote system
1573 /* close stdin, stdout (if not logging to it), but not stderr */
1574 close_low_fds(true, !debug_get_output_is_stdout(), false);
1581 smbd_setup_sig_chld_handler(parent);
1583 smbd_process(ev_ctx, msg_ctx, sock, true);
1585 exit_server_cleanly(NULL);
1589 if (!open_sockets_smbd(parent, ev_ctx, msg_ctx, ports))
1590 exit_server("open_sockets_smbd() failed");
1592 /* do a printer update now that all messaging has been set up,
1593 * before we allow clients to start connecting */
1594 if (!lp__disable_spoolss() &&
1595 (rpc_spoolss_daemon() != RPC_DAEMON_DISABLED)) {
1596 printing_subsystem_update(ev_ctx, msg_ctx, false);
1600 /* make sure we always have a valid stackframe */
1601 frame = talloc_stackframe();
1604 /* if we are running in the foreground then look for
1605 EOF on stdin, and exit if it happens. This allows
1606 us to die if the parent process dies
1607 Only do this on a pipe or socket, no other device.
1610 if (fstat(0, &st) != 0) {
1613 if (S_ISFIFO(st.st_mode) || S_ISSOCK(st.st_mode)) {
1614 tevent_add_fd(ev_ctx,
1623 smbd_parent_loop(ev_ctx, parent);
1625 exit_server_cleanly(NULL);