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;
450 child_id = pid_to_procid(pid);
452 status = messaging_dgm_cleanup(parent->msg_ctx, pid);
453 DEBUG(10, ("%s: messaging_dgm_cleanup returned %s\n",
454 __func__, nt_errstr(status)));
456 for (child = parent->children; child != NULL; child = child->next) {
457 if (child->pid == pid) {
458 struct smbd_child_pid *tmp = child;
459 DLIST_REMOVE(parent->children, child);
461 parent->num_children -= 1;
467 /* not all forked child processes are added to the children list */
468 DEBUG(2, ("Could not find child %d -- ignoring\n", (int)pid));
472 if (unclean_shutdown) {
473 /* a child terminated uncleanly so tickle all
474 processes to see if they can grab any of the
477 DEBUG(3,(__location__ " Unclean shutdown of pid %u\n",
479 if (parent->cleanup_te == NULL) {
480 /* call the cleanup timer, but not too often */
481 int cleanup_time = lp_parm_int(-1, "smbd", "cleanuptime", 20);
482 parent->cleanup_te = tevent_add_timer(parent->ev_ctx,
484 timeval_current_ofs(cleanup_time, 0),
487 DEBUG(1,("Scheduled cleanup of brl and lock database after unclean shutdown\n"));
491 if (!serverid_deregister(child_id)) {
492 DEBUG(1, ("Could not remove pid %d from serverid.tdb\n",
497 /****************************************************************************
498 Have we reached the process limit ?
499 ****************************************************************************/
501 static bool allowable_number_of_smbd_processes(struct smbd_parent_context *parent)
503 int max_processes = lp_max_smbd_processes();
508 return parent->num_children < max_processes;
511 static void smbd_sig_chld_handler(struct tevent_context *ev,
512 struct tevent_signal *se,
520 struct smbd_parent_context *parent =
521 talloc_get_type_abort(private_data,
522 struct smbd_parent_context);
524 while ((pid = sys_waitpid(-1, &status, WNOHANG)) > 0) {
525 bool unclean_shutdown = False;
527 /* If the child terminated normally, assume
528 it was an unclean shutdown unless the
531 if (WIFEXITED(status)) {
532 unclean_shutdown = WEXITSTATUS(status);
534 /* If the child terminated due to a signal
535 we always assume it was unclean.
537 if (WIFSIGNALED(status)) {
538 unclean_shutdown = True;
540 remove_child_pid(parent, pid, unclean_shutdown);
544 static void smbd_setup_sig_chld_handler(struct smbd_parent_context *parent)
546 struct tevent_signal *se;
548 se = tevent_add_signal(parent->ev_ctx,
549 parent, /* mem_ctx */
551 smbd_sig_chld_handler,
554 exit_server("failed to setup SIGCHLD handler");
558 static void smbd_open_socket_close_fn(struct tevent_context *ev,
559 struct tevent_fd *fde,
563 /* this might be the socket_wrapper swrap_close() */
567 static void smbd_accept_connection(struct tevent_context *ev,
568 struct tevent_fd *fde,
572 struct smbd_open_socket *s = talloc_get_type_abort(private_data,
573 struct smbd_open_socket);
574 struct messaging_context *msg_ctx = s->parent->msg_ctx;
575 struct sockaddr_storage addr;
576 socklen_t in_addrlen = sizeof(addr);
581 fd = accept(s->fd, (struct sockaddr *)(void *)&addr,&in_addrlen);
582 if (fd == -1 && errno == EINTR)
586 DEBUG(0,("accept: %s\n",
591 if (s->parent->interactive) {
592 reinit_after_fork(msg_ctx, ev, true);
593 smbd_process(ev, msg_ctx, fd, true);
594 exit_server_cleanly("end of interactive mode");
598 if (!allowable_number_of_smbd_processes(s->parent)) {
604 * Generate a unique id in the parent process so that we use
605 * the global random state in the parent.
607 unique_id = serverid_get_random_unique_id();
611 NTSTATUS status = NT_STATUS_OK;
617 * Can't use TALLOC_FREE here. Nulling out the argument to it
618 * would overwrite memory we've just freed.
620 talloc_free(s->parent);
623 set_my_unique_id(unique_id);
625 /* Stop zombies, the parent explicitly handles
626 * them, counting worker smbds. */
629 status = reinit_after_fork(msg_ctx,
632 if (!NT_STATUS_IS_OK(status)) {
633 if (NT_STATUS_EQUAL(status,
634 NT_STATUS_TOO_MANY_OPENED_FILES)) {
635 DEBUG(0,("child process cannot initialize "
636 "because too many files are open\n"));
639 if (lp_clustering() &&
640 NT_STATUS_EQUAL(status,
641 NT_STATUS_INTERNAL_DB_ERROR)) {
642 DEBUG(1,("child process cannot initialize "
643 "because connection to CTDB "
648 DEBUG(0,("reinit_after_fork() failed\n"));
649 smb_panic("reinit_after_fork() failed");
652 smbd_process(ev, msg_ctx, fd, false);
654 exit_server_cleanly("end of child");
659 DEBUG(0,("smbd_accept_connection: fork() failed: %s\n",
663 /* The parent doesn't need this socket */
666 /* Sun May 6 18:56:14 2001 ackley@cs.unm.edu:
667 Clear the closed fd info out of server_fd --
668 and more importantly, out of client_fd in
669 util_sock.c, to avoid a possible
670 getpeername failure if we reopen the logs
671 and use %I in the filename.
675 add_child_pid(s->parent, pid);
678 /* Force parent to check log size after
679 * spawning child. Fix from
680 * klausr@ITAP.Physik.Uni-Stuttgart.De. The
681 * parent smbd will log to logserver.smb. It
682 * writes only two messages for each child
683 * started/finished. But each child writes,
684 * say, 50 messages also in logserver.smb,
685 * begining with the debug_count of the
686 * parent, before the child opens its own log
687 * file logserver.client. In a worst case
688 * scenario the size of logserver.smb would be
689 * checked after about 50*50=2500 messages
692 force_check_log_size();
695 static bool smbd_open_one_socket(struct smbd_parent_context *parent,
696 struct tevent_context *ev_ctx,
697 const struct sockaddr_storage *ifss,
700 struct smbd_open_socket *s;
702 s = talloc(parent, struct smbd_open_socket);
708 s->fd = open_socket_in(SOCK_STREAM,
710 parent->sockets == NULL ? 0 : 2,
714 DEBUG(0,("smbd_open_once_socket: open_socket_in: "
715 "%s\n", strerror(errno)));
718 * We ignore an error here, as we've done before
723 /* ready to listen */
724 set_socket_options(s->fd, "SO_KEEPALIVE");
725 set_socket_options(s->fd, lp_socket_options());
727 /* Set server socket to
728 * non-blocking for the accept. */
729 set_blocking(s->fd, False);
731 if (listen(s->fd, SMBD_LISTEN_BACKLOG) == -1) {
732 DEBUG(0,("open_sockets_smbd: listen: "
733 "%s\n", strerror(errno)));
739 s->fde = tevent_add_fd(ev_ctx,
741 s->fd, TEVENT_FD_READ,
742 smbd_accept_connection,
745 DEBUG(0,("open_sockets_smbd: "
746 "tevent_add_fd: %s\n",
752 tevent_fd_set_close_fn(s->fde, smbd_open_socket_close_fn);
754 DLIST_ADD_END(parent->sockets, s, struct smbd_open_socket *);
759 /****************************************************************************
760 Open the socket communication.
761 ****************************************************************************/
763 static bool open_sockets_smbd(struct smbd_parent_context *parent,
764 struct tevent_context *ev_ctx,
765 struct messaging_context *msg_ctx,
766 const char *smb_ports)
768 int num_interfaces = iface_count();
771 unsigned dns_port = 0;
778 smbd_setup_sig_chld_handler(parent);
780 ports = lp_smb_ports();
782 /* use a reasonable default set of ports - listing on 445 and 139 */
784 ports = (const char **)str_list_make_v3(talloc_tos(), smb_ports, NULL);
787 for (j = 0; ports && ports[j]; j++) {
788 unsigned port = atoi(ports[j]);
790 if (port == 0 || port > 0xffff) {
791 exit_server_cleanly("Invalid port in the config or on "
792 "the commandline specified!");
796 if (lp_interfaces() && lp_bind_interfaces_only()) {
797 /* We have been given an interfaces line, and been
798 told to only bind to those interfaces. Create a
799 socket per interface and bind to only these.
802 /* Now open a listen socket for each of the
804 for(i = 0; i < num_interfaces; i++) {
805 const struct sockaddr_storage *ifss =
806 iface_n_sockaddr_storage(i);
808 DEBUG(0,("open_sockets_smbd: "
809 "interface %d has NULL IP address !\n",
814 for (j = 0; ports && ports[j]; j++) {
815 unsigned port = atoi(ports[j]);
817 /* Keep the first port for mDNS service
824 if (!smbd_open_one_socket(parent,
833 /* Just bind to 0.0.0.0 - accept connections
836 const char *sock_addr;
838 const char *sock_ptr;
841 sock_addr = "::,0.0.0.0";
843 sock_addr = "0.0.0.0";
846 for (sock_ptr=sock_addr;
847 next_token_talloc(talloc_tos(), &sock_ptr, &sock_tok, " \t,"); ) {
848 for (j = 0; ports && ports[j]; j++) {
849 struct sockaddr_storage ss;
850 unsigned port = atoi(ports[j]);
852 /* Keep the first port for mDNS service
859 /* open an incoming socket */
860 if (!interpret_string_addr(&ss, sock_tok,
861 AI_NUMERICHOST|AI_PASSIVE)) {
866 * If we fail to open any sockets
867 * in this loop the parent-sockets == NULL
868 * case below will prevent us from starting.
871 (void)smbd_open_one_socket(parent,
879 if (parent->sockets == NULL) {
880 DEBUG(0,("open_sockets_smbd: No "
881 "sockets available to bind to.\n"));
885 /* Setup the main smbd so that we can get messages. Note that
886 do this after starting listening. This is needed as when in
887 clustered mode, ctdb won't allow us to start doing database
888 operations until it has gone thru a full startup, which
889 includes checking to see that smbd is listening. */
891 if (!serverid_register(messaging_server_id(msg_ctx),
892 FLAG_MSG_GENERAL|FLAG_MSG_SMBD
893 |FLAG_MSG_PRINT_GENERAL
895 DEBUG(0, ("open_sockets_smbd: Failed to register "
896 "myself in serverid.tdb\n"));
900 /* Listen to messages */
902 messaging_register(msg_ctx, NULL, MSG_SHUTDOWN, msg_exit_server);
903 messaging_register(msg_ctx, ev_ctx, MSG_SMB_CONF_UPDATED,
904 smbd_parent_conf_updated);
905 messaging_register(msg_ctx, NULL, MSG_SMB_STAT_CACHE_DELETE,
906 smb_stat_cache_delete);
907 messaging_register(msg_ctx, NULL, MSG_DEBUG, smbd_msg_debug);
908 messaging_register(msg_ctx, ev_ctx, MSG_PRINTER_PCAP,
910 messaging_register(msg_ctx, NULL, MSG_SMB_BRL_VALIDATE,
912 messaging_register(msg_ctx, NULL, MSG_SMB_FORCE_TDIS,
913 smb_parent_force_tdis);
914 messaging_register(msg_ctx, NULL, MSG_SMB_KILL_CLIENT_IP,
915 smb_parent_kill_client_by_ip);
916 messaging_register(msg_ctx, NULL, MSG_SMB_TELL_NUM_CHILDREN,
917 smb_tell_num_children);
919 messaging_register(msg_ctx, NULL,
920 ID_CACHE_DELETE, smbd_parent_id_cache_delete);
921 messaging_register(msg_ctx, NULL,
922 ID_CACHE_KILL, smbd_parent_id_cache_kill);
924 if (lp_clustering()) {
925 ctdbd_register_reconfigure(messaging_ctdbd_connection());
929 messaging_register(msg_ctx, NULL, MSG_SMB_INJECT_FAULT,
933 if (lp_multicast_dns_register() && (dns_port != 0)) {
934 #ifdef WITH_DNSSD_SUPPORT
935 smbd_setup_mdns_registration(ev_ctx,
938 #ifdef WITH_AVAHI_SUPPORT
941 avahi_conn = avahi_start_register(ev_ctx,
944 if (avahi_conn == NULL) {
945 DEBUG(10, ("avahi_start_register failed\n"));
955 handle stdin becoming readable when we are in --foreground mode
957 static void smbd_stdin_handler(struct tevent_context *ev,
958 struct tevent_fd *fde,
963 if (read(0, &c, 1) != 1) {
964 /* we have reached EOF on stdin, which means the
965 parent has exited. Shutdown the server */
966 exit_server_cleanly("EOF on stdin");
970 static void smbd_parent_loop(struct tevent_context *ev_ctx,
971 struct smbd_parent_context *parent)
973 /* now accept incoming connections - forking a new process
974 for each incoming connection */
975 DEBUG(2,("waiting for connections\n"));
978 TALLOC_CTX *frame = talloc_stackframe();
980 ret = tevent_loop_once(ev_ctx);
982 exit_server_cleanly("tevent_loop_once() error");
988 /* NOTREACHED return True; */
992 /****************************************************************************
993 Initialise connect, service and file structs.
994 ****************************************************************************/
996 static bool init_structs(void )
999 * Set the machine NETBIOS name if not already
1000 * set from the config file.
1006 if (!secrets_init())
1012 static void smbd_parent_sig_term_handler(struct tevent_context *ev,
1013 struct tevent_signal *se,
1019 exit_server_cleanly("termination signal");
1022 static void smbd_parent_sig_hup_handler(struct tevent_context *ev,
1023 struct tevent_signal *se,
1029 struct smbd_parent_context *parent =
1030 talloc_get_type_abort(private_data,
1031 struct smbd_parent_context);
1033 change_to_root_user();
1034 DEBUG(1,("parent: Reloading services after SIGHUP\n"));
1035 reload_services(NULL, NULL, false);
1037 printing_subsystem_update(parent->ev_ctx, parent->msg_ctx, true);
1040 /****************************************************************************
1042 ****************************************************************************/
1044 /* Declare prototype for build_options() to avoid having to run it through
1045 mkproto.h. Mixing $(builddir) and $(srcdir) source files in the current
1046 prototype generation system is too complicated. */
1048 extern void build_options(bool screen);
1050 int main(int argc,const char *argv[])
1052 /* shall I run as a daemon */
1053 bool is_daemon = false;
1054 bool interactive = false;
1056 bool no_process_group = false;
1057 bool log_stdout = false;
1059 char *profile_level = NULL;
1062 bool print_build_options = False;
1067 OPT_NO_PROCESS_GROUP,
1070 struct poptOption long_options[] = {
1072 {"daemon", 'D', POPT_ARG_NONE, NULL, OPT_DAEMON, "Become a daemon (default)" },
1073 {"interactive", 'i', POPT_ARG_NONE, NULL, OPT_INTERACTIVE, "Run interactive (not a daemon)"},
1074 {"foreground", 'F', POPT_ARG_NONE, NULL, OPT_FORK, "Run daemon in foreground (for daemontools, etc.)" },
1075 {"no-process-group", '\0', POPT_ARG_NONE, NULL, OPT_NO_PROCESS_GROUP, "Don't create a new process group" },
1076 {"log-stdout", 'S', POPT_ARG_NONE, NULL, OPT_LOG_STDOUT, "Log to stdout" },
1077 {"build-options", 'b', POPT_ARG_NONE, NULL, 'b', "Print build options" },
1078 {"port", 'p', POPT_ARG_STRING, &ports, 0, "Listen on the specified ports"},
1079 {"profiling-level", 'P', POPT_ARG_STRING, &profile_level, 0, "Set profiling level","PROFILE_LEVEL"},
1083 struct smbd_parent_context *parent = NULL;
1086 struct tevent_context *ev_ctx;
1087 struct messaging_context *msg_ctx;
1088 struct server_id server_id;
1089 struct tevent_signal *se;
1090 char *np_dir = NULL;
1091 static const struct smbd_shim smbd_shim_fns =
1093 .cancel_pending_lock_requests_by_fid = smbd_cancel_pending_lock_requests_by_fid,
1094 .send_stat_cache_delete_message = smbd_send_stat_cache_delete_message,
1095 .change_to_root_user = smbd_change_to_root_user,
1096 .become_authenticated_pipe_user = smbd_become_authenticated_pipe_user,
1097 .unbecome_authenticated_pipe_user = smbd_unbecome_authenticated_pipe_user,
1099 .contend_level2_oplocks_begin = smbd_contend_level2_oplocks_begin,
1100 .contend_level2_oplocks_end = smbd_contend_level2_oplocks_end,
1102 .become_root = smbd_become_root,
1103 .unbecome_root = smbd_unbecome_root,
1105 .exit_server = smbd_exit_server,
1106 .exit_server_cleanly = smbd_exit_server_cleanly,
1110 * Do this before any other talloc operation
1112 talloc_enable_null_tracking();
1113 frame = talloc_stackframe();
1115 setup_logging(argv[0], DEBUG_DEFAULT_STDOUT);
1119 set_smbd_shim(&smbd_shim_fns);
1121 smbd_init_globals();
1125 #ifdef HAVE_SET_AUTH_PARAMETERS
1126 set_auth_parameters(argc,argv);
1129 pc = poptGetContext("smbd", argc, argv, long_options, 0);
1130 while((opt = poptGetNextOpt(pc)) != -1) {
1135 case OPT_INTERACTIVE:
1141 case OPT_NO_PROCESS_GROUP:
1142 no_process_group = true;
1144 case OPT_LOG_STDOUT:
1148 print_build_options = True;
1151 d_fprintf(stderr, "\nInvalid option %s: %s\n\n",
1152 poptBadOption(pc, 0), poptStrerror(opt));
1153 poptPrintUsage(pc, stderr, 0);
1157 poptFreeContext(pc);
1165 setup_logging(argv[0], DEBUG_STDOUT);
1167 setup_logging(argv[0], DEBUG_FILE);
1170 if (print_build_options) {
1171 build_options(True); /* Display output to screen as well as debug */
1176 /* needed for SecureWare on SCO */
1180 set_remote_machine_name("smbd", False);
1182 if (interactive && (DEBUGLEVEL >= 9)) {
1183 talloc_enable_leak_report();
1186 if (log_stdout && Fork) {
1187 DEBUG(0,("ERROR: Can't log to stdout (-S) unless daemon is in foreground (-F) or interactive (-i)\n"));
1191 /* we want to re-seed early to prevent time delays causing
1192 client problems at a later date. (tridge) */
1193 generate_random_buffer(NULL, 0);
1195 /* get initial effective uid and gid */
1198 /* make absolutely sure we run as root - to handle cases where people
1199 are crazy enough to have it setuid */
1200 gain_root_privilege();
1201 gain_root_group_privilege();
1204 dump_core_setup("smbd", lp_logfile(talloc_tos()));
1206 /* we are never interested in SIGPIPE */
1207 BlockSignals(True,SIGPIPE);
1210 /* we are never interested in SIGFPE */
1211 BlockSignals(True,SIGFPE);
1214 #if defined(SIGUSR2)
1215 /* We are no longer interested in USR2 */
1216 BlockSignals(True,SIGUSR2);
1219 /* POSIX demands that signals are inherited. If the invoking process has
1220 * these signals masked, we will have problems, as we won't recieve them. */
1221 BlockSignals(False, SIGHUP);
1222 BlockSignals(False, SIGUSR1);
1223 BlockSignals(False, SIGTERM);
1225 /* Ensure we leave no zombies until we
1226 * correctly set up child handling below. */
1230 /* we want total control over the permissions on created files,
1231 so set our umask to 0 */
1236 DEBUG(0,("smbd version %s started.\n", samba_version_string()));
1237 DEBUGADD(0,("%s\n", COPYRIGHT_STARTUP_MESSAGE));
1239 DEBUG(2,("uid=%d gid=%d euid=%d egid=%d\n",
1240 (int)getuid(),(int)getgid(),(int)geteuid(),(int)getegid()));
1242 /* Output the build options to the debug log */
1243 build_options(False);
1245 if (sizeof(uint16) < 2 || sizeof(uint32) < 4) {
1246 DEBUG(0,("ERROR: Samba is not configured correctly for the word size on your machine\n"));
1250 if (!lp_load_initial_only(get_dyn_CONFIGFILE())) {
1251 DEBUG(0, ("error opening config file '%s'\n", get_dyn_CONFIGFILE()));
1255 if (!cluster_probe_ok()) {
1259 /* Init the security context and global current_user */
1263 * Initialize the event context. The event context needs to be
1264 * initialized before the messaging context, cause the messaging
1265 * context holds an event context.
1266 * FIXME: This should be s3_tevent_context_init()
1268 ev_ctx = server_event_context();
1269 if (ev_ctx == NULL) {
1274 * Init the messaging context
1275 * FIXME: This should only call messaging_init()
1277 msg_ctx = server_messaging_context();
1278 if (msg_ctx == NULL) {
1283 * Reloading of the printers will not work here as we don't have a
1284 * server info and rpc services set up. It will be called later.
1286 if (!reload_services(NULL, NULL, false)) {
1290 if (lp_server_role() == ROLE_ACTIVE_DIRECTORY_DC
1291 && !lp_parm_bool(-1, "server role check", "inhibit", false)) {
1292 DEBUG(0, ("server role = 'active directory domain controller' not compatible with running smbd standalone. \n"));
1293 DEBUGADD(0, ("You should start 'samba' instead, and it will control starting smbd if required\n"));
1297 /* ...NOTE... Log files are working from this point! */
1299 DEBUG(3,("loaded services\n"));
1304 if (!profile_setup(msg_ctx, False)) {
1305 DEBUG(0,("ERROR: failed to setup profiling\n"));
1308 if (profile_level != NULL) {
1309 int pl = atoi(profile_level);
1310 struct server_id src;
1312 DEBUG(1, ("setting profiling level: %s\n",profile_level));
1314 set_profile_level(pl, src);
1318 if (!is_daemon && !is_a_socket(0)) {
1320 DEBUG(3, ("Standard input is not a socket, "
1321 "assuming -D option\n"));
1325 * Setting is_daemon here prevents us from eventually calling
1326 * the open_sockets_inetd()
1332 if (is_daemon && !interactive) {
1333 DEBUG(3, ("Becoming a daemon.\n"));
1334 become_daemon(Fork, no_process_group, log_stdout);
1337 set_my_unique_id(serverid_get_random_unique_id());
1341 * If we're interactive we want to set our own process group for
1342 * signal management.
1344 if (interactive && !no_process_group)
1345 setpgid( (pid_t)0, (pid_t)0);
1348 if (!directory_exist(lp_lock_directory()))
1349 mkdir(lp_lock_directory(), 0755);
1351 if (!directory_exist(lp_pid_directory()))
1352 mkdir(lp_pid_directory(), 0755);
1355 pidfile_create(lp_pid_directory(), "smbd");
1357 status = reinit_after_fork(msg_ctx,
1360 if (!NT_STATUS_IS_OK(status)) {
1361 exit_daemon("reinit_after_fork() failed", map_errno_from_nt_status(status));
1366 * Do not initialize the parent-child-pipe before becoming a
1367 * daemon: this is used to detect a died parent in the child
1370 status = init_before_fork();
1371 if (!NT_STATUS_IS_OK(status)) {
1372 exit_daemon(nt_errstr(status), map_errno_from_nt_status(status));
1376 parent = talloc_zero(ev_ctx, struct smbd_parent_context);
1378 exit_server("talloc(struct smbd_parent_context) failed");
1380 parent->interactive = interactive;
1381 parent->ev_ctx = ev_ctx;
1382 parent->msg_ctx = msg_ctx;
1385 se = tevent_add_signal(parent->ev_ctx,
1388 smbd_parent_sig_term_handler,
1391 exit_server("failed to setup SIGTERM handler");
1393 se = tevent_add_signal(parent->ev_ctx,
1396 smbd_parent_sig_hup_handler,
1399 exit_server("failed to setup SIGHUP handler");
1402 /* Setup all the TDB's - including CLEAR_IF_FIRST tdb's. */
1404 if (smbd_memcache() == NULL) {
1405 exit_daemon("no memcache available", EACCES);
1408 memcache_set_global(smbd_memcache());
1410 /* Initialise the password backed before the global_sam_sid
1411 to ensure that we fetch from ldap before we make a domain sid up */
1413 if(!initialize_password_db(false, ev_ctx))
1416 if (!secrets_init()) {
1417 exit_daemon("smbd can not open secrets.tdb", EACCES);
1420 if (lp_server_role() == ROLE_DOMAIN_BDC || lp_server_role() == ROLE_DOMAIN_PDC) {
1421 struct loadparm_context *lp_ctx = loadparm_init_s3(NULL, loadparm_s3_helpers());
1422 if (!open_schannel_session_store(NULL, lp_ctx)) {
1423 exit_daemon("ERROR: Samba cannot open schannel store for secured NETLOGON operations.", EACCES);
1425 TALLOC_FREE(lp_ctx);
1428 if(!get_global_sam_sid()) {
1429 exit_daemon("Samba cannot create a SAM SID", EACCES);
1432 server_id = messaging_server_id(msg_ctx);
1433 status = smbXsrv_version_global_init(&server_id);
1434 if (!NT_STATUS_IS_OK(status)) {
1435 exit_daemon("Samba cannot init server context", EACCES);
1438 status = smbXsrv_session_global_init();
1439 if (!NT_STATUS_IS_OK(status)) {
1440 exit_daemon("Samba cannot init session context", EACCES);
1443 status = smbXsrv_tcon_global_init();
1444 if (!NT_STATUS_IS_OK(status)) {
1445 exit_daemon("Samba cannot init tcon context", EACCES);
1448 if (!locking_init())
1449 exit_daemon("Samba cannot init locking", EACCES);
1451 if (!smbd_parent_notify_init(NULL, msg_ctx, ev_ctx)) {
1452 exit_daemon("Samba cannot init notification", EACCES);
1455 if (!messaging_parent_dgm_cleanup_init(msg_ctx)) {
1459 if (!smbd_scavenger_init(NULL, msg_ctx, ev_ctx)) {
1460 exit_daemon("Samba cannot init scavenging", EACCES);
1463 if (!serverid_parent_init(ev_ctx)) {
1464 exit_daemon("Samba cannot init server id", EACCES);
1467 if (!W_ERROR_IS_OK(registry_init_full()))
1468 exit_daemon("Samba cannot init registry", EACCES);
1470 /* Open the share_info.tdb here, so we don't have to open
1471 after the fork on every single connection. This is a small
1472 performance improvment and reduces the total number of system
1474 if (!share_info_db_init()) {
1475 exit_daemon("ERROR: failed to load share info db.", EACCES);
1478 status = init_system_session_info();
1479 if (!NT_STATUS_IS_OK(status)) {
1480 DEBUG(1, ("ERROR: failed to setup system user info: %s.\n",
1481 nt_errstr(status)));
1485 if (!init_guest_info()) {
1486 DEBUG(0,("ERROR: failed to setup guest info.\n"));
1490 if (!file_init_global()) {
1491 DEBUG(0, ("ERROR: file_init_global() failed\n"));
1494 status = smbXsrv_open_global_init();
1495 if (!NT_STATUS_IS_OK(status)) {
1496 exit_daemon("Samba cannot init global open", map_errno_from_nt_status(status));
1499 /* This MUST be done before start_epmd() because otherwise
1500 * start_epmd() forks and races against dcesrv_ep_setup() to
1501 * call directory_create_or_exist() */
1502 if (!directory_create_or_exist(lp_ncalrpc_dir(), geteuid(), 0755)) {
1503 DEBUG(0, ("Failed to create pipe directory %s - %s\n",
1504 lp_ncalrpc_dir(), strerror(errno)));
1508 np_dir = talloc_asprintf(talloc_tos(), "%s/np", lp_ncalrpc_dir());
1510 DEBUG(0, ("%s: Out of memory\n", __location__));
1514 if (!directory_create_or_exist_strict(np_dir, geteuid(), 0700)) {
1515 DEBUG(0, ("Failed to create pipe directory %s - %s\n",
1516 np_dir, strerror(errno)));
1520 if (is_daemon && !interactive) {
1521 if (rpc_epmapper_daemon() == RPC_DAEMON_FORK) {
1522 start_epmd(ev_ctx, msg_ctx);
1526 if (!dcesrv_ep_setup(ev_ctx, msg_ctx)) {
1527 exit_daemon("Samba cannot setup ep pipe", EACCES);
1530 if (is_daemon && !interactive) {
1531 daemon_ready("smbd");
1534 /* only start other daemons if we are running as a daemon
1535 * -- bad things will happen if smbd is launched via inetd
1536 * and we fork a copy of ourselves here */
1537 if (is_daemon && !interactive) {
1539 if (rpc_lsasd_daemon() == RPC_DAEMON_FORK) {
1540 start_lsasd(ev_ctx, msg_ctx);
1543 if (!lp__disable_spoolss() &&
1544 (rpc_spoolss_daemon() != RPC_DAEMON_DISABLED)) {
1545 bool bgq = lp_parm_bool(-1, "smbd", "backgroundqueue", true);
1547 if (!printing_subsystem_init(ev_ctx, msg_ctx, true, bgq)) {
1548 exit_daemon("Samba failed to init printing subsystem", EACCES);
1551 } else if (!lp__disable_spoolss() &&
1552 (rpc_spoolss_daemon() != RPC_DAEMON_DISABLED)) {
1553 if (!printing_subsystem_init(ev_ctx, msg_ctx, false, false)) {
1564 /* Started from inetd. fd 0 is the socket. */
1565 /* We will abort gracefully when the client or remote system
1569 /* close stdin, stdout (if not logging to it), but not stderr */
1570 close_low_fds(true, !debug_get_output_is_stdout(), false);
1577 smbd_setup_sig_chld_handler(parent);
1579 smbd_process(ev_ctx, msg_ctx, sock, true);
1581 exit_server_cleanly(NULL);
1585 if (!open_sockets_smbd(parent, ev_ctx, msg_ctx, ports))
1586 exit_server("open_sockets_smbd() failed");
1588 /* do a printer update now that all messaging has been set up,
1589 * before we allow clients to start connecting */
1590 if (!lp__disable_spoolss() &&
1591 (rpc_spoolss_daemon() != RPC_DAEMON_DISABLED)) {
1592 printing_subsystem_update(ev_ctx, msg_ctx, false);
1596 /* make sure we always have a valid stackframe */
1597 frame = talloc_stackframe();
1600 /* if we are running in the foreground then look for
1601 EOF on stdin, and exit if it happens. This allows
1602 us to die if the parent process dies
1603 Only do this on a pipe or socket, no other device.
1606 if (fstat(0, &st) != 0) {
1609 if (S_ISFIFO(st.st_mode) || S_ISSOCK(st.st_mode)) {
1610 tevent_add_fd(ev_ctx,
1619 smbd_parent_loop(ev_ctx, parent);
1621 exit_server_cleanly(NULL);