2 Unix SMB/CIFS implementation.
3 Main SMB server routines
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Martin Pool 2002
6 Copyright (C) Jelmer Vernooij 2002-2003
7 Copyright (C) Volker Lendecke 1993-2007
8 Copyright (C) Jeremy Allison 1993-2007
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>.
25 #include "system/filesys.h"
26 #include "popt_common.h"
27 #include "smbd/smbd.h"
28 #include "smbd/globals.h"
29 #include "registry/reg_init_full.h"
30 #include "libcli/auth/schannel.h"
32 #include "../lib/util/memcache.h"
33 #include "ctdbd_conn.h"
34 #include "util_cluster.h"
35 #include "printing/queue_process.h"
36 #include "rpc_server/rpc_service_setup.h"
37 #include "rpc_server/rpc_config.h"
42 #include "smbprofile.h"
43 #include "lib/id_cache.h"
44 #include "lib/param/param.h"
45 #include "lib/background.h"
46 #include "lib/conn_tdb.h"
47 #include "../lib/util/pidfile.h"
48 #include "lib/smbd_shim.h"
49 #include "scavenger.h"
50 #include "locking/leases_db.h"
51 #include "smbd/notifyd/notifyd.h"
53 #ifdef CLUSTER_SUPPORT
54 #include "ctdb_protocol.h"
57 struct smbd_open_socket;
58 struct smbd_child_pid;
60 struct smbd_parent_context {
63 struct tevent_context *ev_ctx;
64 struct messaging_context *msg_ctx;
66 /* the list of listening sockets */
67 struct smbd_open_socket *sockets;
69 /* the list of current child processes */
70 struct smbd_child_pid *children;
73 struct tevent_timer *cleanup_te;
76 struct smbd_open_socket {
77 struct smbd_open_socket *prev, *next;
78 struct smbd_parent_context *parent;
80 struct tevent_fd *fde;
83 struct smbd_child_pid {
84 struct smbd_child_pid *prev, *next;
88 extern void start_epmd(struct tevent_context *ev_ctx,
89 struct messaging_context *msg_ctx);
91 extern void start_lsasd(struct tevent_context *ev_ctx,
92 struct messaging_context *msg_ctx);
94 extern void start_fssd(struct tevent_context *ev_ctx,
95 struct messaging_context *msg_ctx);
97 extern void start_mdssd(struct tevent_context *ev_ctx,
98 struct messaging_context *msg_ctx);
100 /*******************************************************************
101 What to do when smb.conf is updated.
102 ********************************************************************/
104 static void smbd_parent_conf_updated(struct messaging_context *msg,
107 struct server_id server_id,
110 struct tevent_context *ev_ctx =
111 talloc_get_type_abort(private_data, struct tevent_context);
113 DEBUG(10,("smbd_parent_conf_updated: Got message saying smb.conf was "
114 "updated. Reloading.\n"));
115 change_to_root_user();
116 reload_services(NULL, NULL, false);
117 printing_subsystem_update(ev_ctx, msg, false);
120 /*******************************************************************
121 Delete a statcache entry.
122 ********************************************************************/
124 static void smb_stat_cache_delete(struct messaging_context *msg,
127 struct server_id server_id,
130 const char *name = (const char *)data->data;
131 DEBUG(10,("smb_stat_cache_delete: delete name %s\n", name));
132 stat_cache_delete(name);
135 /****************************************************************************
136 Send a SIGTERM to our process group.
137 *****************************************************************************/
139 static void killkids(void)
141 if(am_parent) kill(0,SIGTERM);
144 static void msg_exit_server(struct messaging_context *msg,
147 struct server_id server_id,
150 DEBUG(3, ("got a SHUTDOWN message\n"));
151 exit_server_cleanly(NULL);
155 static void msg_inject_fault(struct messaging_context *msg,
158 struct server_id src,
162 struct server_id_buf tmp;
164 if (data->length != sizeof(sig)) {
165 DEBUG(0, ("Process %s sent bogus signal injection request\n",
166 server_id_str_buf(src, &tmp)));
170 sig = *(int *)data->data;
172 exit_server("internal error injected");
177 DEBUG(0, ("Process %s requested injection of signal %d (%s)\n",
178 server_id_str_buf(src, &tmp), sig, strsignal(sig)));
180 DEBUG(0, ("Process %s requested injection of signal %d\n",
181 server_id_str_buf(src, &tmp), sig));
186 #endif /* DEVELOPER */
188 static NTSTATUS messaging_send_to_children(struct messaging_context *msg_ctx,
189 uint32_t msg_type, DATA_BLOB* data)
192 struct smbd_parent_context *parent = am_parent;
193 struct smbd_child_pid *child;
195 if (parent == NULL) {
196 return NT_STATUS_INTERNAL_ERROR;
199 for (child = parent->children; child != NULL; child = child->next) {
200 status = messaging_send(parent->msg_ctx,
201 pid_to_procid(child->pid),
203 if (!NT_STATUS_IS_OK(status)) {
210 static void smb_parent_send_to_children(struct messaging_context *ctx,
213 struct server_id srv_id,
216 messaging_send_to_children(ctx, msg_type, msg_data);
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 #ifdef CLUSTER_SUPPORT
268 static int smbd_parent_ctdb_reconfigured(
269 uint32_t src_vnn, uint32_t dst_vnn, uint64_t dst_srvid,
270 const uint8_t *msg, size_t msglen, void *private_data)
272 struct messaging_context *msg_ctx = talloc_get_type_abort(
273 private_data, struct messaging_context);
275 DEBUG(10, ("Got %s message\n", (dst_srvid == CTDB_SRVID_RECONFIGURE)
276 ? "cluster reconfigure" : "SAMBA_NOTIFY"));
279 * Someone from the family died, validate our locks
282 messaging_send_buf(msg_ctx, messaging_server_id(msg_ctx),
283 MSG_SMB_BRL_VALIDATE, NULL, 0);
289 static void add_child_pid(struct smbd_parent_context *parent,
292 struct smbd_child_pid *child;
294 child = talloc_zero(parent, struct smbd_child_pid);
296 DEBUG(0, ("Could not add child struct -- malloc failed\n"));
300 DLIST_ADD(parent->children, child);
301 parent->num_children += 1;
304 static void smb_tell_num_children(struct messaging_context *ctx, void *data,
305 uint32_t msg_type, struct server_id srv_id,
308 uint8_t buf[sizeof(uint32_t)];
311 SIVAL(buf, 0, am_parent->num_children);
312 messaging_send_buf(ctx, srv_id, MSG_SMB_NUM_CHILDREN,
317 static void notifyd_stopped(struct tevent_req *req);
319 static struct tevent_req *notifyd_req(struct messaging_context *msg_ctx,
320 struct tevent_context *ev)
322 struct tevent_req *req;
323 sys_notify_watch_fn sys_notify_watch = NULL;
324 struct sys_notify_context *sys_notify_ctx = NULL;
326 if (lp_kernel_change_notify()) {
329 if (lp_parm_bool(-1, "notify", "inotify", true)) {
330 sys_notify_watch = inotify_watch;
335 if (lp_parm_bool(-1, "notify", "fam",
336 (sys_notify_watch == NULL))) {
337 sys_notify_watch = fam_watch;
342 if (sys_notify_watch != NULL) {
343 sys_notify_ctx = sys_notify_context_create(msg_ctx, ev);
344 if (sys_notify_ctx == NULL) {
349 req = notifyd_send(msg_ctx, ev, msg_ctx,
350 messaging_ctdbd_connection(),
351 sys_notify_watch, sys_notify_ctx);
353 TALLOC_FREE(sys_notify_ctx);
356 tevent_req_set_callback(req, notifyd_stopped, msg_ctx);
361 static void notifyd_stopped(struct tevent_req *req)
365 ret = notifyd_recv(req);
367 DEBUG(1, ("notifyd stopped: %s\n", strerror(ret)));
370 static bool smbd_notifyd_init(struct messaging_context *msg, bool interactive)
372 struct tevent_context *ev = messaging_tevent_context(msg);
373 struct tevent_req *req;
378 req = notifyd_req(msg, ev);
379 return (req != NULL);
384 DEBUG(1, ("%s: fork failed: %s\n", __func__,
393 status = reinit_after_fork(msg, ev, true, "smbd-notifyd");
394 if (!NT_STATUS_IS_OK(status)) {
395 DEBUG(1, ("%s: reinit_after_fork failed: %s\n",
396 __func__, nt_errstr(status)));
400 req = notifyd_req(msg, ev);
404 tevent_req_set_callback(req, notifyd_stopped, msg);
405 return tevent_req_poll(req, ev);
409 at most every smbd:cleanuptime seconds (default 20), we scan the BRL
410 and locking database for entries to cleanup. As a side effect this
411 also cleans up dead entries in the connections database (due to the
412 traversal in message_send_all()
414 Using a timer for this prevents a flood of traversals when a large
415 number of clients disconnect at the same time (perhaps due to a
419 static void cleanup_timeout_fn(struct tevent_context *event_ctx,
420 struct tevent_timer *te,
424 struct smbd_parent_context *parent =
425 talloc_get_type_abort(private_data,
426 struct smbd_parent_context);
428 parent->cleanup_te = NULL;
430 DEBUG(1,("Cleaning up brl and lock database after unclean shutdown\n"));
431 message_send_all(parent->msg_ctx, MSG_SMB_UNLOCK, NULL, 0, NULL);
432 messaging_send_buf(parent->msg_ctx,
433 messaging_server_id(parent->msg_ctx),
434 MSG_SMB_BRL_VALIDATE, NULL, 0);
437 static void remove_child_pid(struct smbd_parent_context *parent,
439 bool unclean_shutdown)
441 struct smbd_child_pid *child;
442 struct server_id child_id;
445 child_id = pid_to_procid(pid);
447 ret = messaging_cleanup(parent->msg_ctx, pid);
449 if ((ret != 0) && (ret != ENOENT)) {
450 DEBUG(10, ("%s: messaging_cleanup returned %s\n",
451 __func__, strerror(ret)));
454 smbprofile_cleanup(pid);
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);
580 fd = accept(s->fd, (struct sockaddr *)(void *)&addr,&in_addrlen);
581 if (fd == -1 && errno == EINTR)
585 DEBUG(0,("accept: %s\n",
590 if (s->parent->interactive) {
591 reinit_after_fork(msg_ctx, ev, true, NULL);
592 smbd_process(ev, msg_ctx, fd, true);
593 exit_server_cleanly("end of interactive mode");
597 if (!allowable_number_of_smbd_processes(s->parent)) {
604 NTSTATUS status = NT_STATUS_OK;
607 * Can't use TALLOC_FREE here. Nulling out the argument to it
608 * would overwrite memory we've just freed.
610 talloc_free(s->parent);
613 /* Stop zombies, the parent explicitly handles
614 * them, counting worker smbds. */
617 status = smbd_reinit_after_fork(msg_ctx, ev, true, NULL);
618 if (!NT_STATUS_IS_OK(status)) {
619 if (NT_STATUS_EQUAL(status,
620 NT_STATUS_TOO_MANY_OPENED_FILES)) {
621 DEBUG(0,("child process cannot initialize "
622 "because too many files are open\n"));
625 if (lp_clustering() &&
626 NT_STATUS_EQUAL(status,
627 NT_STATUS_INTERNAL_DB_ERROR)) {
628 DEBUG(1,("child process cannot initialize "
629 "because connection to CTDB "
634 DEBUG(0,("reinit_after_fork() failed\n"));
635 smb_panic("reinit_after_fork() failed");
638 smbd_process(ev, msg_ctx, fd, false);
640 exit_server_cleanly("end of child");
645 DEBUG(0,("smbd_accept_connection: fork() failed: %s\n",
649 /* The parent doesn't need this socket */
652 /* Sun May 6 18:56:14 2001 ackley@cs.unm.edu:
653 Clear the closed fd info out of server_fd --
654 and more importantly, out of client_fd in
655 util_sock.c, to avoid a possible
656 getpeername failure if we reopen the logs
657 and use %I in the filename.
661 add_child_pid(s->parent, pid);
664 /* Force parent to check log size after
665 * spawning child. Fix from
666 * klausr@ITAP.Physik.Uni-Stuttgart.De. The
667 * parent smbd will log to logserver.smb. It
668 * writes only two messages for each child
669 * started/finished. But each child writes,
670 * say, 50 messages also in logserver.smb,
671 * begining with the debug_count of the
672 * parent, before the child opens its own log
673 * file logserver.client. In a worst case
674 * scenario the size of logserver.smb would be
675 * checked after about 50*50=2500 messages
678 force_check_log_size();
681 static bool smbd_open_one_socket(struct smbd_parent_context *parent,
682 struct tevent_context *ev_ctx,
683 const struct sockaddr_storage *ifss,
686 struct smbd_open_socket *s;
688 s = talloc(parent, struct smbd_open_socket);
694 s->fd = open_socket_in(SOCK_STREAM,
696 parent->sockets == NULL ? 0 : 2,
700 DEBUG(0,("smbd_open_one_socket: open_socket_in: "
701 "%s\n", strerror(errno)));
704 * We ignore an error here, as we've done before
709 /* ready to listen */
710 set_socket_options(s->fd, "SO_KEEPALIVE");
711 set_socket_options(s->fd, lp_socket_options());
713 /* Set server socket to
714 * non-blocking for the accept. */
715 set_blocking(s->fd, False);
717 if (listen(s->fd, SMBD_LISTEN_BACKLOG) == -1) {
718 DEBUG(0,("smbd_open_one_socket: listen: "
719 "%s\n", strerror(errno)));
725 s->fde = tevent_add_fd(ev_ctx,
727 s->fd, TEVENT_FD_READ,
728 smbd_accept_connection,
731 DEBUG(0,("smbd_open_one_socket: "
732 "tevent_add_fd: %s\n",
738 tevent_fd_set_close_fn(s->fde, smbd_open_socket_close_fn);
740 DLIST_ADD_END(parent->sockets, s, struct smbd_open_socket *);
745 /****************************************************************************
746 Open the socket communication.
747 ****************************************************************************/
749 static bool open_sockets_smbd(struct smbd_parent_context *parent,
750 struct tevent_context *ev_ctx,
751 struct messaging_context *msg_ctx,
752 const char *smb_ports)
754 int num_interfaces = iface_count();
757 unsigned dns_port = 0;
764 smbd_setup_sig_chld_handler(parent);
766 ports = lp_smb_ports();
768 /* use a reasonable default set of ports - listing on 445 and 139 */
771 l = str_list_make_v3(talloc_tos(), smb_ports, NULL);
772 ports = discard_const_p(const char *, l);
775 for (j = 0; ports && ports[j]; j++) {
776 unsigned port = atoi(ports[j]);
778 if (port == 0 || port > 0xffff) {
779 exit_server_cleanly("Invalid port in the config or on "
780 "the commandline specified!");
784 if (lp_interfaces() && lp_bind_interfaces_only()) {
785 /* We have been given an interfaces line, and been
786 told to only bind to those interfaces. Create a
787 socket per interface and bind to only these.
790 /* Now open a listen socket for each of the
792 for(i = 0; i < num_interfaces; i++) {
793 const struct sockaddr_storage *ifss =
794 iface_n_sockaddr_storage(i);
796 DEBUG(0,("open_sockets_smbd: "
797 "interface %d has NULL IP address !\n",
802 for (j = 0; ports && ports[j]; j++) {
803 unsigned port = atoi(ports[j]);
805 /* Keep the first port for mDNS service
812 if (!smbd_open_one_socket(parent,
821 /* Just bind to 0.0.0.0 - accept connections
824 const char *sock_addr;
826 const char *sock_ptr;
829 sock_addr = "::,0.0.0.0";
831 sock_addr = "0.0.0.0";
834 for (sock_ptr=sock_addr;
835 next_token_talloc(talloc_tos(), &sock_ptr, &sock_tok, " \t,"); ) {
836 for (j = 0; ports && ports[j]; j++) {
837 struct sockaddr_storage ss;
838 unsigned port = atoi(ports[j]);
840 /* Keep the first port for mDNS service
847 /* open an incoming socket */
848 if (!interpret_string_addr(&ss, sock_tok,
849 AI_NUMERICHOST|AI_PASSIVE)) {
854 * If we fail to open any sockets
855 * in this loop the parent-sockets == NULL
856 * case below will prevent us from starting.
859 (void)smbd_open_one_socket(parent,
867 if (parent->sockets == NULL) {
868 DEBUG(0,("open_sockets_smbd: No "
869 "sockets available to bind to.\n"));
873 /* Setup the main smbd so that we can get messages. Note that
874 do this after starting listening. This is needed as when in
875 clustered mode, ctdb won't allow us to start doing database
876 operations until it has gone thru a full startup, which
877 includes checking to see that smbd is listening. */
879 if (!serverid_register(messaging_server_id(msg_ctx),
880 FLAG_MSG_GENERAL|FLAG_MSG_SMBD
881 |FLAG_MSG_PRINT_GENERAL
883 DEBUG(0, ("open_sockets_smbd: Failed to register "
884 "myself in serverid.tdb\n"));
888 /* Listen to messages */
890 messaging_register(msg_ctx, NULL, MSG_SHUTDOWN, msg_exit_server);
891 messaging_register(msg_ctx, ev_ctx, MSG_SMB_CONF_UPDATED,
892 smbd_parent_conf_updated);
893 messaging_register(msg_ctx, NULL, MSG_SMB_STAT_CACHE_DELETE,
894 smb_stat_cache_delete);
895 messaging_register(msg_ctx, NULL, MSG_DEBUG, smbd_msg_debug);
896 messaging_register(msg_ctx, NULL, MSG_SMB_BRL_VALIDATE,
898 messaging_register(msg_ctx, NULL, MSG_SMB_FORCE_TDIS,
899 smb_parent_send_to_children);
900 messaging_register(msg_ctx, NULL, MSG_SMB_KILL_CLIENT_IP,
901 smb_parent_send_to_children);
902 messaging_register(msg_ctx, NULL, MSG_SMB_TELL_NUM_CHILDREN,
903 smb_tell_num_children);
905 messaging_register(msg_ctx, NULL,
906 ID_CACHE_DELETE, smbd_parent_id_cache_delete);
907 messaging_register(msg_ctx, NULL,
908 ID_CACHE_KILL, smbd_parent_id_cache_kill);
910 #ifdef CLUSTER_SUPPORT
911 if (lp_clustering()) {
912 struct ctdbd_connection *conn = messaging_ctdbd_connection();
914 register_with_ctdbd(conn, CTDB_SRVID_RECONFIGURE,
915 smbd_parent_ctdb_reconfigured, msg_ctx);
916 register_with_ctdbd(conn, CTDB_SRVID_SAMBA_NOTIFY,
917 smbd_parent_ctdb_reconfigured, msg_ctx);
922 messaging_register(msg_ctx, NULL, MSG_SMB_INJECT_FAULT,
926 if (lp_multicast_dns_register() && (dns_port != 0)) {
927 #ifdef WITH_DNSSD_SUPPORT
928 smbd_setup_mdns_registration(ev_ctx,
931 #ifdef WITH_AVAHI_SUPPORT
934 avahi_conn = avahi_start_register(ev_ctx,
937 if (avahi_conn == NULL) {
938 DEBUG(10, ("avahi_start_register failed\n"));
948 handle stdin becoming readable when we are in --foreground mode
950 static void smbd_stdin_handler(struct tevent_context *ev,
951 struct tevent_fd *fde,
956 if (read(0, &c, 1) != 1) {
957 /* we have reached EOF on stdin, which means the
958 parent has exited. Shutdown the server */
959 exit_server_cleanly("EOF on stdin");
963 struct smbd_parent_tevent_trace_state {
967 static void smbd_parent_tevent_trace_callback(enum tevent_trace_point point,
970 struct smbd_parent_tevent_trace_state *state =
971 (struct smbd_parent_tevent_trace_state *)private_data;
974 case TEVENT_TRACE_BEFORE_WAIT:
976 case TEVENT_TRACE_AFTER_WAIT:
978 case TEVENT_TRACE_BEFORE_LOOP_ONCE:
979 TALLOC_FREE(state->frame);
980 state->frame = talloc_stackframe();
982 case TEVENT_TRACE_AFTER_LOOP_ONCE:
983 TALLOC_FREE(state->frame);
990 static void smbd_parent_loop(struct tevent_context *ev_ctx,
991 struct smbd_parent_context *parent)
993 struct smbd_parent_tevent_trace_state trace_state = {
998 tevent_set_trace_callback(ev_ctx, smbd_parent_tevent_trace_callback,
1001 /* now accept incoming connections - forking a new process
1002 for each incoming connection */
1003 DEBUG(2,("waiting for connections\n"));
1005 ret = tevent_loop_wait(ev_ctx);
1007 DEBUG(0, ("tevent_loop_wait failed: %d, %s, exiting\n",
1008 ret, strerror(errno)));
1011 TALLOC_FREE(trace_state.frame);
1013 /* NOTREACHED return True; */
1017 /****************************************************************************
1018 Initialise connect, service and file structs.
1019 ****************************************************************************/
1021 static bool init_structs(void )
1024 * Set the machine NETBIOS name if not already
1025 * set from the config file.
1031 if (!secrets_init())
1037 static void smbd_parent_sig_term_handler(struct tevent_context *ev,
1038 struct tevent_signal *se,
1044 exit_server_cleanly("termination signal");
1047 static void smbd_parent_sig_hup_handler(struct tevent_context *ev,
1048 struct tevent_signal *se,
1054 struct smbd_parent_context *parent =
1055 talloc_get_type_abort(private_data,
1056 struct smbd_parent_context);
1058 change_to_root_user();
1059 DEBUG(1,("parent: Reloading services after SIGHUP\n"));
1060 reload_services(NULL, NULL, false);
1062 printing_subsystem_update(parent->ev_ctx, parent->msg_ctx, true);
1065 /****************************************************************************
1067 ****************************************************************************/
1069 /* Declare prototype for build_options() to avoid having to run it through
1070 mkproto.h. Mixing $(builddir) and $(srcdir) source files in the current
1071 prototype generation system is too complicated. */
1073 extern void build_options(bool screen);
1075 int main(int argc,const char *argv[])
1077 /* shall I run as a daemon */
1078 bool is_daemon = false;
1079 bool interactive = false;
1081 bool no_process_group = false;
1082 bool log_stdout = false;
1084 char *profile_level = NULL;
1087 bool print_build_options = False;
1092 OPT_NO_PROCESS_GROUP,
1095 struct poptOption long_options[] = {
1097 {"daemon", 'D', POPT_ARG_NONE, NULL, OPT_DAEMON, "Become a daemon (default)" },
1098 {"interactive", 'i', POPT_ARG_NONE, NULL, OPT_INTERACTIVE, "Run interactive (not a daemon)"},
1099 {"foreground", 'F', POPT_ARG_NONE, NULL, OPT_FORK, "Run daemon in foreground (for daemontools, etc.)" },
1100 {"no-process-group", '\0', POPT_ARG_NONE, NULL, OPT_NO_PROCESS_GROUP, "Don't create a new process group" },
1101 {"log-stdout", 'S', POPT_ARG_NONE, NULL, OPT_LOG_STDOUT, "Log to stdout" },
1102 {"build-options", 'b', POPT_ARG_NONE, NULL, 'b', "Print build options" },
1103 {"port", 'p', POPT_ARG_STRING, &ports, 0, "Listen on the specified ports"},
1104 {"profiling-level", 'P', POPT_ARG_STRING, &profile_level, 0, "Set profiling level","PROFILE_LEVEL"},
1108 struct smbd_parent_context *parent = NULL;
1111 struct tevent_context *ev_ctx;
1112 struct messaging_context *msg_ctx;
1113 struct server_id server_id;
1114 struct tevent_signal *se;
1115 int profiling_level;
1116 char *np_dir = NULL;
1117 static const struct smbd_shim smbd_shim_fns =
1119 .cancel_pending_lock_requests_by_fid = smbd_cancel_pending_lock_requests_by_fid,
1120 .send_stat_cache_delete_message = smbd_send_stat_cache_delete_message,
1121 .change_to_root_user = smbd_change_to_root_user,
1122 .become_authenticated_pipe_user = smbd_become_authenticated_pipe_user,
1123 .unbecome_authenticated_pipe_user = smbd_unbecome_authenticated_pipe_user,
1125 .contend_level2_oplocks_begin = smbd_contend_level2_oplocks_begin,
1126 .contend_level2_oplocks_end = smbd_contend_level2_oplocks_end,
1128 .become_root = smbd_become_root,
1129 .unbecome_root = smbd_unbecome_root,
1131 .exit_server = smbd_exit_server,
1132 .exit_server_cleanly = smbd_exit_server_cleanly,
1136 * Do this before any other talloc operation
1138 talloc_enable_null_tracking();
1139 frame = talloc_stackframe();
1141 setup_logging(argv[0], DEBUG_DEFAULT_STDOUT);
1145 set_smbd_shim(&smbd_shim_fns);
1147 smbd_init_globals();
1151 #ifdef HAVE_SET_AUTH_PARAMETERS
1152 set_auth_parameters(argc,argv);
1155 pc = poptGetContext("smbd", argc, argv, long_options, 0);
1156 while((opt = poptGetNextOpt(pc)) != -1) {
1161 case OPT_INTERACTIVE:
1167 case OPT_NO_PROCESS_GROUP:
1168 no_process_group = true;
1170 case OPT_LOG_STDOUT:
1174 print_build_options = True;
1177 d_fprintf(stderr, "\nInvalid option %s: %s\n\n",
1178 poptBadOption(pc, 0), poptStrerror(opt));
1179 poptPrintUsage(pc, stderr, 0);
1183 poptFreeContext(pc);
1191 setup_logging(argv[0], DEBUG_STDOUT);
1193 setup_logging(argv[0], DEBUG_FILE);
1196 if (print_build_options) {
1197 build_options(True); /* Display output to screen as well as debug */
1202 /* needed for SecureWare on SCO */
1206 set_remote_machine_name("smbd", False);
1208 if (interactive && (DEBUGLEVEL >= 9)) {
1209 talloc_enable_leak_report();
1212 if (log_stdout && Fork) {
1213 DEBUG(0,("ERROR: Can't log to stdout (-S) unless daemon is in foreground (-F) or interactive (-i)\n"));
1218 * We want to die early if we can't open /dev/urandom
1220 generate_random_buffer(NULL, 0);
1222 /* get initial effective uid and gid */
1225 /* make absolutely sure we run as root - to handle cases where people
1226 are crazy enough to have it setuid */
1227 gain_root_privilege();
1228 gain_root_group_privilege();
1231 dump_core_setup("smbd", lp_logfile(talloc_tos()));
1233 /* we are never interested in SIGPIPE */
1234 BlockSignals(True,SIGPIPE);
1237 /* we are never interested in SIGFPE */
1238 BlockSignals(True,SIGFPE);
1241 #if defined(SIGUSR2)
1242 /* We are no longer interested in USR2 */
1243 BlockSignals(True,SIGUSR2);
1246 /* POSIX demands that signals are inherited. If the invoking process has
1247 * these signals masked, we will have problems, as we won't recieve them. */
1248 BlockSignals(False, SIGHUP);
1249 BlockSignals(False, SIGUSR1);
1250 BlockSignals(False, SIGTERM);
1252 /* Ensure we leave no zombies until we
1253 * correctly set up child handling below. */
1257 /* we want total control over the permissions on created files,
1258 so set our umask to 0 */
1263 DEBUG(0,("smbd version %s started.\n", samba_version_string()));
1264 DEBUGADD(0,("%s\n", COPYRIGHT_STARTUP_MESSAGE));
1266 DEBUG(2,("uid=%d gid=%d euid=%d egid=%d\n",
1267 (int)getuid(),(int)getgid(),(int)geteuid(),(int)getegid()));
1269 /* Output the build options to the debug log */
1270 build_options(False);
1272 if (sizeof(uint16_t) < 2 || sizeof(uint32_t) < 4) {
1273 DEBUG(0,("ERROR: Samba is not configured correctly for the word size on your machine\n"));
1277 if (!lp_load_initial_only(get_dyn_CONFIGFILE())) {
1278 DEBUG(0, ("error opening config file '%s'\n", get_dyn_CONFIGFILE()));
1282 if (!cluster_probe_ok()) {
1286 /* Init the security context and global current_user */
1290 * Initialize the event context. The event context needs to be
1291 * initialized before the messaging context, cause the messaging
1292 * context holds an event context.
1293 * FIXME: This should be s3_tevent_context_init()
1295 ev_ctx = server_event_context();
1296 if (ev_ctx == NULL) {
1301 * Init the messaging context
1302 * FIXME: This should only call messaging_init()
1304 msg_ctx = server_messaging_context();
1305 if (msg_ctx == NULL) {
1310 * Reloading of the printers will not work here as we don't have a
1311 * server info and rpc services set up. It will be called later.
1313 if (!reload_services(NULL, NULL, false)) {
1317 if (lp_server_role() == ROLE_ACTIVE_DIRECTORY_DC
1318 && !lp_parm_bool(-1, "server role check", "inhibit", false)) {
1319 DEBUG(0, ("server role = 'active directory domain controller' not compatible with running smbd standalone. \n"));
1320 DEBUGADD(0, ("You should start 'samba' instead, and it will control starting smbd if required\n"));
1324 /* ...NOTE... Log files are working from this point! */
1326 DEBUG(3,("loaded services\n"));
1330 if (!profile_setup(msg_ctx, False)) {
1331 DEBUG(0,("ERROR: failed to setup profiling\n"));
1335 if (profile_level != NULL) {
1336 profiling_level = atoi(profile_level);
1338 profiling_level = lp_smbd_profiling_level();
1340 set_profile_level(profiling_level, messaging_server_id(msg_ctx));
1342 if (!is_daemon && !is_a_socket(0)) {
1344 DEBUG(3, ("Standard input is not a socket, "
1345 "assuming -D option\n"));
1349 * Setting is_daemon here prevents us from eventually calling
1350 * the open_sockets_inetd()
1356 if (is_daemon && !interactive) {
1357 DEBUG(3, ("Becoming a daemon.\n"));
1358 become_daemon(Fork, no_process_group, log_stdout);
1363 * If we're interactive we want to set our own process group for
1364 * signal management.
1366 if (interactive && !no_process_group)
1367 setpgid( (pid_t)0, (pid_t)0);
1370 if (!directory_exist(lp_lock_directory()))
1371 mkdir(lp_lock_directory(), 0755);
1373 if (!directory_exist(lp_pid_directory()))
1374 mkdir(lp_pid_directory(), 0755);
1377 pidfile_create(lp_pid_directory(), "smbd");
1379 status = reinit_after_fork(msg_ctx, ev_ctx, false, NULL);
1380 if (!NT_STATUS_IS_OK(status)) {
1381 exit_daemon("reinit_after_fork() failed", map_errno_from_nt_status(status));
1386 * Do not initialize the parent-child-pipe before becoming a
1387 * daemon: this is used to detect a died parent in the child
1390 status = init_before_fork();
1391 if (!NT_STATUS_IS_OK(status)) {
1392 exit_daemon(nt_errstr(status), map_errno_from_nt_status(status));
1396 parent = talloc_zero(ev_ctx, struct smbd_parent_context);
1398 exit_server("talloc(struct smbd_parent_context) failed");
1400 parent->interactive = interactive;
1401 parent->ev_ctx = ev_ctx;
1402 parent->msg_ctx = msg_ctx;
1405 se = tevent_add_signal(parent->ev_ctx,
1408 smbd_parent_sig_term_handler,
1411 exit_server("failed to setup SIGTERM handler");
1413 se = tevent_add_signal(parent->ev_ctx,
1416 smbd_parent_sig_hup_handler,
1419 exit_server("failed to setup SIGHUP handler");
1422 /* Setup all the TDB's - including CLEAR_IF_FIRST tdb's. */
1424 if (smbd_memcache() == NULL) {
1425 exit_daemon("no memcache available", EACCES);
1428 memcache_set_global(smbd_memcache());
1430 /* Initialise the password backed before the global_sam_sid
1431 to ensure that we fetch from ldap before we make a domain sid up */
1433 if(!initialize_password_db(false, ev_ctx))
1436 if (!secrets_init()) {
1437 exit_daemon("smbd can not open secrets.tdb", EACCES);
1440 if (lp_server_role() == ROLE_DOMAIN_BDC || lp_server_role() == ROLE_DOMAIN_PDC) {
1441 struct loadparm_context *lp_ctx = loadparm_init_s3(NULL, loadparm_s3_helpers());
1442 if (!open_schannel_session_store(NULL, lp_ctx)) {
1443 exit_daemon("ERROR: Samba cannot open schannel store for secured NETLOGON operations.", EACCES);
1445 TALLOC_FREE(lp_ctx);
1448 if(!get_global_sam_sid()) {
1449 exit_daemon("Samba cannot create a SAM SID", EACCES);
1452 server_id = messaging_server_id(msg_ctx);
1453 status = smbXsrv_version_global_init(&server_id);
1454 if (!NT_STATUS_IS_OK(status)) {
1455 exit_daemon("Samba cannot init server context", EACCES);
1458 status = smbXsrv_session_global_init();
1459 if (!NT_STATUS_IS_OK(status)) {
1460 exit_daemon("Samba cannot init session context", EACCES);
1463 status = smbXsrv_tcon_global_init();
1464 if (!NT_STATUS_IS_OK(status)) {
1465 exit_daemon("Samba cannot init tcon context", EACCES);
1468 if (!locking_init())
1469 exit_daemon("Samba cannot init locking", EACCES);
1471 if (!leases_db_init(false)) {
1472 exit_daemon("Samba cannot init leases", EACCES);
1475 if (!smbd_notifyd_init(msg_ctx, interactive)) {
1476 exit_daemon("Samba cannot init notification", EACCES);
1479 if (!messaging_parent_dgm_cleanup_init(msg_ctx)) {
1483 if (!smbd_scavenger_init(NULL, msg_ctx, ev_ctx)) {
1484 exit_daemon("Samba cannot init scavenging", EACCES);
1487 if (!serverid_parent_init(ev_ctx)) {
1488 exit_daemon("Samba cannot init server id", EACCES);
1491 if (!W_ERROR_IS_OK(registry_init_full()))
1492 exit_daemon("Samba cannot init registry", EACCES);
1494 /* Open the share_info.tdb here, so we don't have to open
1495 after the fork on every single connection. This is a small
1496 performance improvment and reduces the total number of system
1498 if (!share_info_db_init()) {
1499 exit_daemon("ERROR: failed to load share info db.", EACCES);
1502 status = init_system_session_info();
1503 if (!NT_STATUS_IS_OK(status)) {
1504 DEBUG(1, ("ERROR: failed to setup system user info: %s.\n",
1505 nt_errstr(status)));
1509 if (!init_guest_info()) {
1510 DEBUG(0,("ERROR: failed to setup guest info.\n"));
1514 if (!file_init_global()) {
1515 DEBUG(0, ("ERROR: file_init_global() failed\n"));
1518 status = smbXsrv_open_global_init();
1519 if (!NT_STATUS_IS_OK(status)) {
1520 exit_daemon("Samba cannot init global open", map_errno_from_nt_status(status));
1523 /* This MUST be done before start_epmd() because otherwise
1524 * start_epmd() forks and races against dcesrv_ep_setup() to
1525 * call directory_create_or_exist() */
1526 if (!directory_create_or_exist(lp_ncalrpc_dir(), 0755)) {
1527 DEBUG(0, ("Failed to create pipe directory %s - %s\n",
1528 lp_ncalrpc_dir(), strerror(errno)));
1532 np_dir = talloc_asprintf(talloc_tos(), "%s/np", lp_ncalrpc_dir());
1534 DEBUG(0, ("%s: Out of memory\n", __location__));
1538 if (!directory_create_or_exist_strict(np_dir, geteuid(), 0700)) {
1539 DEBUG(0, ("Failed to create pipe directory %s - %s\n",
1540 np_dir, strerror(errno)));
1544 if (is_daemon && !interactive) {
1545 if (rpc_epmapper_daemon() == RPC_DAEMON_FORK) {
1546 start_epmd(ev_ctx, msg_ctx);
1550 if (!dcesrv_ep_setup(ev_ctx, msg_ctx)) {
1551 exit_daemon("Samba cannot setup ep pipe", EACCES);
1554 if (is_daemon && !interactive) {
1555 daemon_ready("smbd");
1558 /* only start other daemons if we are running as a daemon
1559 * -- bad things will happen if smbd is launched via inetd
1560 * and we fork a copy of ourselves here */
1561 if (is_daemon && !interactive) {
1563 if (rpc_lsasd_daemon() == RPC_DAEMON_FORK) {
1564 start_lsasd(ev_ctx, msg_ctx);
1567 if (rpc_fss_daemon() == RPC_DAEMON_FORK) {
1568 start_fssd(ev_ctx, msg_ctx);
1571 if (!lp__disable_spoolss() &&
1572 (rpc_spoolss_daemon() != RPC_DAEMON_DISABLED)) {
1573 bool bgq = lp_parm_bool(-1, "smbd", "backgroundqueue", true);
1575 if (!printing_subsystem_init(ev_ctx, msg_ctx, true, bgq)) {
1576 exit_daemon("Samba failed to init printing subsystem", EACCES);
1580 #ifdef WITH_SPOTLIGHT
1581 if ((rpc_mdssvc_mode() == RPC_SERVICE_MODE_EXTERNAL) &&
1582 (rpc_mdssd_daemon() == RPC_DAEMON_FORK)) {
1583 start_mdssd(ev_ctx, msg_ctx);
1586 } else if (!lp__disable_spoolss() &&
1587 (rpc_spoolss_daemon() != RPC_DAEMON_DISABLED)) {
1588 if (!printing_subsystem_init(ev_ctx, msg_ctx, false, false)) {
1599 /* Started from inetd. fd 0 is the socket. */
1600 /* We will abort gracefully when the client or remote system
1604 /* close stdin, stdout (if not logging to it), but not stderr */
1605 close_low_fds(true, !debug_get_output_is_stdout(), false);
1612 smbd_setup_sig_chld_handler(parent);
1614 smbd_process(ev_ctx, msg_ctx, sock, true);
1616 exit_server_cleanly(NULL);
1620 if (!open_sockets_smbd(parent, ev_ctx, msg_ctx, ports))
1621 exit_server("open_sockets_smbd() failed");
1623 /* do a printer update now that all messaging has been set up,
1624 * before we allow clients to start connecting */
1625 if (!lp__disable_spoolss() &&
1626 (rpc_spoolss_daemon() != RPC_DAEMON_DISABLED)) {
1627 printing_subsystem_update(ev_ctx, msg_ctx, false);
1631 /* make sure we always have a valid stackframe */
1632 frame = talloc_stackframe();
1635 /* if we are running in the foreground then look for
1636 EOF on stdin, and exit if it happens. This allows
1637 us to die if the parent process dies
1638 Only do this on a pipe or socket, no other device.
1641 if (fstat(0, &st) != 0) {
1644 if (S_ISFIFO(st.st_mode) || S_ISSOCK(st.st_mode)) {
1645 tevent_add_fd(ev_ctx,
1654 smbd_parent_loop(ev_ctx, parent);
1656 exit_server_cleanly(NULL);