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"
52 #include "smbd/smbd_cleanupd.h"
53 #include "lib/util/sys_rw.h"
55 #ifdef CLUSTER_SUPPORT
56 #include "ctdb_protocol.h"
59 struct smbd_open_socket;
60 struct smbd_child_pid;
62 struct smbd_parent_context {
65 struct tevent_context *ev_ctx;
66 struct messaging_context *msg_ctx;
68 /* the list of listening sockets */
69 struct smbd_open_socket *sockets;
71 /* the list of current child processes */
72 struct smbd_child_pid *children;
75 struct server_id cleanupd;
77 struct tevent_timer *cleanup_te;
80 struct smbd_open_socket {
81 struct smbd_open_socket *prev, *next;
82 struct smbd_parent_context *parent;
84 struct tevent_fd *fde;
87 struct smbd_child_pid {
88 struct smbd_child_pid *prev, *next;
92 extern void start_epmd(struct tevent_context *ev_ctx,
93 struct messaging_context *msg_ctx);
95 extern void start_lsasd(struct tevent_context *ev_ctx,
96 struct messaging_context *msg_ctx);
98 extern void start_fssd(struct tevent_context *ev_ctx,
99 struct messaging_context *msg_ctx);
101 extern void start_mdssd(struct tevent_context *ev_ctx,
102 struct messaging_context *msg_ctx);
104 /*******************************************************************
105 What to do when smb.conf is updated.
106 ********************************************************************/
108 static void smbd_parent_conf_updated(struct messaging_context *msg,
111 struct server_id server_id,
114 struct tevent_context *ev_ctx =
115 talloc_get_type_abort(private_data, struct tevent_context);
117 DEBUG(10,("smbd_parent_conf_updated: Got message saying smb.conf was "
118 "updated. Reloading.\n"));
119 change_to_root_user();
120 reload_services(NULL, NULL, false);
121 printing_subsystem_update(ev_ctx, msg, false);
124 /*******************************************************************
125 Delete a statcache entry.
126 ********************************************************************/
128 static void smb_stat_cache_delete(struct messaging_context *msg,
131 struct server_id server_id,
134 const char *name = (const char *)data->data;
135 DEBUG(10,("smb_stat_cache_delete: delete name %s\n", name));
136 stat_cache_delete(name);
139 /****************************************************************************
140 Send a SIGTERM to our process group.
141 *****************************************************************************/
143 static void killkids(void)
145 if(am_parent) kill(0,SIGTERM);
148 static void msg_exit_server(struct messaging_context *msg,
151 struct server_id server_id,
154 DEBUG(3, ("got a SHUTDOWN message\n"));
155 exit_server_cleanly(NULL);
159 static void msg_inject_fault(struct messaging_context *msg,
162 struct server_id src,
166 struct server_id_buf tmp;
168 if (data->length != sizeof(sig)) {
169 DEBUG(0, ("Process %s sent bogus signal injection request\n",
170 server_id_str_buf(src, &tmp)));
174 sig = *(int *)data->data;
176 exit_server("internal error injected");
181 DEBUG(0, ("Process %s requested injection of signal %d (%s)\n",
182 server_id_str_buf(src, &tmp), sig, strsignal(sig)));
184 DEBUG(0, ("Process %s requested injection of signal %d\n",
185 server_id_str_buf(src, &tmp), sig));
190 #endif /* DEVELOPER */
192 static NTSTATUS messaging_send_to_children(struct messaging_context *msg_ctx,
193 uint32_t msg_type, DATA_BLOB* data)
196 struct smbd_parent_context *parent = am_parent;
197 struct smbd_child_pid *child;
199 if (parent == NULL) {
200 return NT_STATUS_INTERNAL_ERROR;
203 for (child = parent->children; child != NULL; child = child->next) {
204 status = messaging_send(parent->msg_ctx,
205 pid_to_procid(child->pid),
207 if (!NT_STATUS_IS_OK(status)) {
214 static void smb_parent_send_to_children(struct messaging_context *ctx,
217 struct server_id srv_id,
220 messaging_send_to_children(ctx, msg_type, msg_data);
224 * Parent smbd process sets its own debug level first and then
225 * sends a message to all the smbd children to adjust their debug
226 * level to that of the parent.
229 static void smbd_msg_debug(struct messaging_context *msg_ctx,
232 struct server_id server_id,
235 debug_message(msg_ctx, private_data, MSG_DEBUG, server_id, data);
237 messaging_send_to_children(msg_ctx, MSG_DEBUG, data);
240 static void smbd_parent_id_cache_kill(struct messaging_context *msg_ctx,
243 struct server_id server_id,
246 const char *msg = (data && data->data)
247 ? (const char *)data->data : "<NULL>";
248 struct id_cache_ref id;
250 if (!id_cache_ref_parse(msg, &id)) {
251 DEBUG(0, ("Invalid ?ID: %s\n", msg));
255 id_cache_delete_from_cache(&id);
257 messaging_send_to_children(msg_ctx, msg_type, data);
260 static void smbd_parent_id_cache_delete(struct messaging_context *ctx,
263 struct server_id srv_id,
266 id_cache_delete_message(ctx, data, msg_type, srv_id, msg_data);
268 messaging_send_to_children(ctx, msg_type, msg_data);
271 #ifdef CLUSTER_SUPPORT
272 static int smbd_parent_ctdb_reconfigured(
273 uint32_t src_vnn, uint32_t dst_vnn, uint64_t dst_srvid,
274 const uint8_t *msg, size_t msglen, void *private_data)
276 struct messaging_context *msg_ctx = talloc_get_type_abort(
277 private_data, struct messaging_context);
279 DEBUG(10, ("Got %s message\n", (dst_srvid == CTDB_SRVID_RECONFIGURE)
280 ? "cluster reconfigure" : "SAMBA_NOTIFY"));
283 * Someone from the family died, validate our locks
287 messaging_send_buf(msg_ctx, am_parent->cleanupd,
288 MSG_SMB_BRL_VALIDATE, NULL, 0);
295 static void add_child_pid(struct smbd_parent_context *parent,
298 struct smbd_child_pid *child;
300 child = talloc_zero(parent, struct smbd_child_pid);
302 DEBUG(0, ("Could not add child struct -- malloc failed\n"));
306 DLIST_ADD(parent->children, child);
307 parent->num_children += 1;
310 static void smb_tell_num_children(struct messaging_context *ctx, void *data,
311 uint32_t msg_type, struct server_id srv_id,
314 uint8_t buf[sizeof(uint32_t)];
317 SIVAL(buf, 0, am_parent->num_children);
318 messaging_send_buf(ctx, srv_id, MSG_SMB_NUM_CHILDREN,
323 static void notifyd_stopped(struct tevent_req *req);
325 static struct tevent_req *notifyd_req(struct messaging_context *msg_ctx,
326 struct tevent_context *ev)
328 struct tevent_req *req;
329 sys_notify_watch_fn sys_notify_watch = NULL;
330 struct sys_notify_context *sys_notify_ctx = NULL;
332 if (lp_kernel_change_notify()) {
335 if (lp_parm_bool(-1, "notify", "inotify", true)) {
336 sys_notify_watch = inotify_watch;
341 if (lp_parm_bool(-1, "notify", "fam",
342 (sys_notify_watch == NULL))) {
343 sys_notify_watch = fam_watch;
348 if (sys_notify_watch != NULL) {
349 sys_notify_ctx = sys_notify_context_create(msg_ctx, ev);
350 if (sys_notify_ctx == NULL) {
355 req = notifyd_send(msg_ctx, ev, msg_ctx,
356 messaging_ctdbd_connection(),
357 sys_notify_watch, sys_notify_ctx);
359 TALLOC_FREE(sys_notify_ctx);
362 tevent_req_set_callback(req, notifyd_stopped, msg_ctx);
367 static void notifyd_stopped(struct tevent_req *req)
371 ret = notifyd_recv(req);
373 DEBUG(1, ("notifyd stopped: %s\n", strerror(ret)));
376 static bool smbd_notifyd_init(struct messaging_context *msg, bool interactive)
378 struct tevent_context *ev = messaging_tevent_context(msg);
379 struct tevent_req *req;
384 req = notifyd_req(msg, ev);
385 return (req != NULL);
390 DEBUG(1, ("%s: fork failed: %s\n", __func__,
399 status = reinit_after_fork(msg, ev, true, "smbd-notifyd");
400 if (!NT_STATUS_IS_OK(status)) {
401 DEBUG(1, ("%s: reinit_after_fork failed: %s\n",
402 __func__, nt_errstr(status)));
406 req = notifyd_req(msg, ev);
410 tevent_req_set_callback(req, notifyd_stopped, msg);
411 return tevent_req_poll(req, ev);
414 static void cleanupd_stopped(struct tevent_req *req);
416 static bool cleanupd_init(struct messaging_context *msg, bool interactive,
417 struct server_id *ppid)
419 struct tevent_context *ev = messaging_tevent_context(msg);
420 struct server_id parent_id = messaging_server_id(msg);
421 struct tevent_req *req;
431 req = smbd_cleanupd_send(msg, ev, msg, parent_id.pid);
432 *ppid = messaging_server_id(msg);
433 return (req != NULL);
438 DBG_WARNING("pipe failed: %s\n", strerror(errno));
444 DBG_WARNING("fork failed: %s\n", strerror(errno));
453 rwret = sys_read(up_pipe[0], &c, 1);
457 DBG_WARNING("sys_read failed: %s\n", strerror(errno));
461 DBG_WARNING("cleanupd could not start\n");
465 DBG_WARNING("cleanupd returned %d\n", (int)c);
469 DBG_DEBUG("Started cleanupd pid=%d\n", (int)pid);
471 *ppid = pid_to_procid(pid);
477 status = reinit_after_fork(msg, ev, true, "cleanupd");
478 if (!NT_STATUS_IS_OK(status)) {
479 DBG_WARNING("reinit_after_fork failed: %s\n",
482 sys_write(up_pipe[1], &c, 1);
487 req = smbd_cleanupd_send(msg, ev, msg, parent_id.pid);
489 DBG_WARNING("smbd_cleanupd_send failed\n");
491 sys_write(up_pipe[1], &c, 1);
496 tevent_req_set_callback(req, cleanupd_stopped, msg);
499 rwret = sys_write(up_pipe[1], &c, 1);
503 DBG_WARNING("sys_write failed: %s\n", strerror(errno));
507 DBG_WARNING("sys_write could not write result\n");
511 ok = tevent_req_poll(req, ev);
513 DBG_WARNING("tevent_req_poll returned %s\n", strerror(errno));
518 static void cleanupd_stopped(struct tevent_req *req)
522 status = smbd_cleanupd_recv(req);
523 DBG_WARNING("cleanupd stopped: %s\n", nt_errstr(status));
527 at most every smbd:cleanuptime seconds (default 20), we scan the BRL
528 and locking database for entries to cleanup. As a side effect this
529 also cleans up dead entries in the connections database (due to the
530 traversal in message_send_all()
532 Using a timer for this prevents a flood of traversals when a large
533 number of clients disconnect at the same time (perhaps due to a
537 static void cleanup_timeout_fn(struct tevent_context *event_ctx,
538 struct tevent_timer *te,
542 struct smbd_parent_context *parent =
543 talloc_get_type_abort(private_data,
544 struct smbd_parent_context);
546 parent->cleanup_te = NULL;
548 messaging_send_buf(parent->msg_ctx, parent->cleanupd,
549 MSG_SMB_UNLOCK, NULL, 0);
552 static void remove_child_pid(struct smbd_parent_context *parent,
554 bool unclean_shutdown)
556 struct smbd_child_pid *child;
560 iov[0] = (struct iovec) { .iov_base = (uint8_t *)&pid,
561 .iov_len = sizeof(pid) };
562 iov[1] = (struct iovec) { .iov_base = (uint8_t *)&unclean_shutdown,
563 .iov_len = sizeof(bool) };
565 status = messaging_send_iov(parent->msg_ctx, parent->cleanupd,
566 MSG_SMB_NOTIFY_CLEANUP,
567 iov, ARRAY_SIZE(iov), NULL, 0);
568 DEBUG(10, ("messaging_send_iov returned %s\n", nt_errstr(status)));
570 for (child = parent->children; child != NULL; child = child->next) {
571 if (child->pid == pid) {
572 struct smbd_child_pid *tmp = child;
573 DLIST_REMOVE(parent->children, child);
575 parent->num_children -= 1;
581 /* not all forked child processes are added to the children list */
582 DEBUG(2, ("Could not find child %d -- ignoring\n", (int)pid));
586 if (unclean_shutdown) {
587 /* a child terminated uncleanly so tickle all
588 processes to see if they can grab any of the
591 DEBUG(3,(__location__ " Unclean shutdown of pid %u\n",
593 if (parent->cleanup_te == NULL) {
594 /* call the cleanup timer, but not too often */
595 int cleanup_time = lp_parm_int(-1, "smbd", "cleanuptime", 20);
596 parent->cleanup_te = tevent_add_timer(parent->ev_ctx,
598 timeval_current_ofs(cleanup_time, 0),
601 DEBUG(1,("Scheduled cleanup of brl and lock database after unclean shutdown\n"));
606 /****************************************************************************
607 Have we reached the process limit ?
608 ****************************************************************************/
610 static bool allowable_number_of_smbd_processes(struct smbd_parent_context *parent)
612 int max_processes = lp_max_smbd_processes();
617 return parent->num_children < max_processes;
620 static void smbd_sig_chld_handler(struct tevent_context *ev,
621 struct tevent_signal *se,
629 struct smbd_parent_context *parent =
630 talloc_get_type_abort(private_data,
631 struct smbd_parent_context);
633 while ((pid = sys_waitpid(-1, &status, WNOHANG)) > 0) {
634 bool unclean_shutdown = False;
636 /* If the child terminated normally, assume
637 it was an unclean shutdown unless the
640 if (WIFEXITED(status)) {
641 unclean_shutdown = WEXITSTATUS(status);
643 /* If the child terminated due to a signal
644 we always assume it was unclean.
646 if (WIFSIGNALED(status)) {
647 unclean_shutdown = True;
649 remove_child_pid(parent, pid, unclean_shutdown);
653 static void smbd_setup_sig_chld_handler(struct smbd_parent_context *parent)
655 struct tevent_signal *se;
657 se = tevent_add_signal(parent->ev_ctx,
658 parent, /* mem_ctx */
660 smbd_sig_chld_handler,
663 exit_server("failed to setup SIGCHLD handler");
667 static void smbd_open_socket_close_fn(struct tevent_context *ev,
668 struct tevent_fd *fde,
672 /* this might be the socket_wrapper swrap_close() */
676 static void smbd_accept_connection(struct tevent_context *ev,
677 struct tevent_fd *fde,
681 struct smbd_open_socket *s = talloc_get_type_abort(private_data,
682 struct smbd_open_socket);
683 struct messaging_context *msg_ctx = s->parent->msg_ctx;
684 struct sockaddr_storage addr;
685 socklen_t in_addrlen = sizeof(addr);
689 fd = accept(s->fd, (struct sockaddr *)(void *)&addr,&in_addrlen);
690 if (fd == -1 && errno == EINTR)
694 DEBUG(0,("accept: %s\n",
699 if (s->parent->interactive) {
700 reinit_after_fork(msg_ctx, ev, true, NULL);
701 smbd_process(ev, msg_ctx, fd, true);
702 exit_server_cleanly("end of interactive mode");
706 if (!allowable_number_of_smbd_processes(s->parent)) {
713 NTSTATUS status = NT_STATUS_OK;
716 * Can't use TALLOC_FREE here. Nulling out the argument to it
717 * would overwrite memory we've just freed.
719 talloc_free(s->parent);
722 /* Stop zombies, the parent explicitly handles
723 * them, counting worker smbds. */
726 status = smbd_reinit_after_fork(msg_ctx, ev, true, NULL);
727 if (!NT_STATUS_IS_OK(status)) {
728 if (NT_STATUS_EQUAL(status,
729 NT_STATUS_TOO_MANY_OPENED_FILES)) {
730 DEBUG(0,("child process cannot initialize "
731 "because too many files are open\n"));
734 if (lp_clustering() &&
735 NT_STATUS_EQUAL(status,
736 NT_STATUS_INTERNAL_DB_ERROR)) {
737 DEBUG(1,("child process cannot initialize "
738 "because connection to CTDB "
743 DEBUG(0,("reinit_after_fork() failed\n"));
744 smb_panic("reinit_after_fork() failed");
747 smbd_process(ev, msg_ctx, fd, false);
749 exit_server_cleanly("end of child");
754 DEBUG(0,("smbd_accept_connection: fork() failed: %s\n",
758 /* The parent doesn't need this socket */
761 /* Sun May 6 18:56:14 2001 ackley@cs.unm.edu:
762 Clear the closed fd info out of server_fd --
763 and more importantly, out of client_fd in
764 util_sock.c, to avoid a possible
765 getpeername failure if we reopen the logs
766 and use %I in the filename.
770 add_child_pid(s->parent, pid);
773 /* Force parent to check log size after
774 * spawning child. Fix from
775 * klausr@ITAP.Physik.Uni-Stuttgart.De. The
776 * parent smbd will log to logserver.smb. It
777 * writes only two messages for each child
778 * started/finished. But each child writes,
779 * say, 50 messages also in logserver.smb,
780 * begining with the debug_count of the
781 * parent, before the child opens its own log
782 * file logserver.client. In a worst case
783 * scenario the size of logserver.smb would be
784 * checked after about 50*50=2500 messages
787 force_check_log_size();
790 static bool smbd_open_one_socket(struct smbd_parent_context *parent,
791 struct tevent_context *ev_ctx,
792 const struct sockaddr_storage *ifss,
795 struct smbd_open_socket *s;
797 s = talloc(parent, struct smbd_open_socket);
803 s->fd = open_socket_in(SOCK_STREAM,
805 parent->sockets == NULL ? 0 : 2,
809 DEBUG(0,("smbd_open_one_socket: open_socket_in: "
810 "%s\n", strerror(errno)));
813 * We ignore an error here, as we've done before
818 /* ready to listen */
819 set_socket_options(s->fd, "SO_KEEPALIVE");
820 set_socket_options(s->fd, lp_socket_options());
822 /* Set server socket to
823 * non-blocking for the accept. */
824 set_blocking(s->fd, False);
826 if (listen(s->fd, SMBD_LISTEN_BACKLOG) == -1) {
827 DEBUG(0,("smbd_open_one_socket: listen: "
828 "%s\n", strerror(errno)));
834 s->fde = tevent_add_fd(ev_ctx,
836 s->fd, TEVENT_FD_READ,
837 smbd_accept_connection,
840 DEBUG(0,("smbd_open_one_socket: "
841 "tevent_add_fd: %s\n",
847 tevent_fd_set_close_fn(s->fde, smbd_open_socket_close_fn);
849 DLIST_ADD_END(parent->sockets, s);
854 /****************************************************************************
855 Open the socket communication.
856 ****************************************************************************/
858 static bool open_sockets_smbd(struct smbd_parent_context *parent,
859 struct tevent_context *ev_ctx,
860 struct messaging_context *msg_ctx,
861 const char *smb_ports)
863 int num_interfaces = iface_count();
866 unsigned dns_port = 0;
873 smbd_setup_sig_chld_handler(parent);
875 ports = lp_smb_ports();
877 /* use a reasonable default set of ports - listing on 445 and 139 */
880 l = str_list_make_v3(talloc_tos(), smb_ports, NULL);
881 ports = discard_const_p(const char *, l);
884 for (j = 0; ports && ports[j]; j++) {
885 unsigned port = atoi(ports[j]);
887 if (port == 0 || port > 0xffff) {
888 exit_server_cleanly("Invalid port in the config or on "
889 "the commandline specified!");
893 if (lp_interfaces() && lp_bind_interfaces_only()) {
894 /* We have been given an interfaces line, and been
895 told to only bind to those interfaces. Create a
896 socket per interface and bind to only these.
899 /* Now open a listen socket for each of the
901 for(i = 0; i < num_interfaces; i++) {
902 const struct sockaddr_storage *ifss =
903 iface_n_sockaddr_storage(i);
905 DEBUG(0,("open_sockets_smbd: "
906 "interface %d has NULL IP address !\n",
911 for (j = 0; ports && ports[j]; j++) {
912 unsigned port = atoi(ports[j]);
914 /* Keep the first port for mDNS service
921 if (!smbd_open_one_socket(parent,
930 /* Just bind to 0.0.0.0 - accept connections
933 const char *sock_addr;
935 const char *sock_ptr;
938 sock_addr = "::,0.0.0.0";
940 sock_addr = "0.0.0.0";
943 for (sock_ptr=sock_addr;
944 next_token_talloc(talloc_tos(), &sock_ptr, &sock_tok, " \t,"); ) {
945 for (j = 0; ports && ports[j]; j++) {
946 struct sockaddr_storage ss;
947 unsigned port = atoi(ports[j]);
949 /* Keep the first port for mDNS service
956 /* open an incoming socket */
957 if (!interpret_string_addr(&ss, sock_tok,
958 AI_NUMERICHOST|AI_PASSIVE)) {
963 * If we fail to open any sockets
964 * in this loop the parent-sockets == NULL
965 * case below will prevent us from starting.
968 (void)smbd_open_one_socket(parent,
976 if (parent->sockets == NULL) {
977 DEBUG(0,("open_sockets_smbd: No "
978 "sockets available to bind to.\n"));
982 /* Setup the main smbd so that we can get messages. Note that
983 do this after starting listening. This is needed as when in
984 clustered mode, ctdb won't allow us to start doing database
985 operations until it has gone thru a full startup, which
986 includes checking to see that smbd is listening. */
988 if (!serverid_register(messaging_server_id(msg_ctx),
989 FLAG_MSG_GENERAL|FLAG_MSG_SMBD
990 |FLAG_MSG_PRINT_GENERAL
992 DEBUG(0, ("open_sockets_smbd: Failed to register "
993 "myself in serverid.tdb\n"));
997 /* Listen to messages */
999 messaging_register(msg_ctx, NULL, MSG_SHUTDOWN, msg_exit_server);
1000 messaging_register(msg_ctx, ev_ctx, MSG_SMB_CONF_UPDATED,
1001 smbd_parent_conf_updated);
1002 messaging_register(msg_ctx, NULL, MSG_SMB_STAT_CACHE_DELETE,
1003 smb_stat_cache_delete);
1004 messaging_register(msg_ctx, NULL, MSG_DEBUG, smbd_msg_debug);
1005 messaging_register(msg_ctx, NULL, MSG_SMB_FORCE_TDIS,
1006 smb_parent_send_to_children);
1007 messaging_register(msg_ctx, NULL, MSG_SMB_KILL_CLIENT_IP,
1008 smb_parent_send_to_children);
1009 messaging_register(msg_ctx, NULL, MSG_SMB_TELL_NUM_CHILDREN,
1010 smb_tell_num_children);
1012 messaging_register(msg_ctx, NULL,
1013 ID_CACHE_DELETE, smbd_parent_id_cache_delete);
1014 messaging_register(msg_ctx, NULL,
1015 ID_CACHE_KILL, smbd_parent_id_cache_kill);
1017 #ifdef CLUSTER_SUPPORT
1018 if (lp_clustering()) {
1019 struct ctdbd_connection *conn = messaging_ctdbd_connection();
1021 register_with_ctdbd(conn, CTDB_SRVID_RECONFIGURE,
1022 smbd_parent_ctdb_reconfigured, msg_ctx);
1023 register_with_ctdbd(conn, CTDB_SRVID_SAMBA_NOTIFY,
1024 smbd_parent_ctdb_reconfigured, msg_ctx);
1029 messaging_register(msg_ctx, NULL, MSG_SMB_INJECT_FAULT,
1033 if (lp_multicast_dns_register() && (dns_port != 0)) {
1034 #ifdef WITH_DNSSD_SUPPORT
1035 smbd_setup_mdns_registration(ev_ctx,
1038 #ifdef WITH_AVAHI_SUPPORT
1041 avahi_conn = avahi_start_register(ev_ctx,
1044 if (avahi_conn == NULL) {
1045 DEBUG(10, ("avahi_start_register failed\n"));
1055 handle stdin becoming readable when we are in --foreground mode
1057 static void smbd_stdin_handler(struct tevent_context *ev,
1058 struct tevent_fd *fde,
1063 if (read(0, &c, 1) != 1) {
1064 /* we have reached EOF on stdin, which means the
1065 parent has exited. Shutdown the server */
1066 exit_server_cleanly("EOF on stdin");
1070 struct smbd_parent_tevent_trace_state {
1074 static void smbd_parent_tevent_trace_callback(enum tevent_trace_point point,
1077 struct smbd_parent_tevent_trace_state *state =
1078 (struct smbd_parent_tevent_trace_state *)private_data;
1081 case TEVENT_TRACE_BEFORE_WAIT:
1083 case TEVENT_TRACE_AFTER_WAIT:
1085 case TEVENT_TRACE_BEFORE_LOOP_ONCE:
1086 TALLOC_FREE(state->frame);
1087 state->frame = talloc_stackframe();
1089 case TEVENT_TRACE_AFTER_LOOP_ONCE:
1090 TALLOC_FREE(state->frame);
1097 static void smbd_parent_loop(struct tevent_context *ev_ctx,
1098 struct smbd_parent_context *parent)
1100 struct smbd_parent_tevent_trace_state trace_state = {
1105 tevent_set_trace_callback(ev_ctx, smbd_parent_tevent_trace_callback,
1108 /* now accept incoming connections - forking a new process
1109 for each incoming connection */
1110 DEBUG(2,("waiting for connections\n"));
1112 ret = tevent_loop_wait(ev_ctx);
1114 DEBUG(0, ("tevent_loop_wait failed: %d, %s, exiting\n",
1115 ret, strerror(errno)));
1118 TALLOC_FREE(trace_state.frame);
1120 /* NOTREACHED return True; */
1124 /****************************************************************************
1125 Initialise connect, service and file structs.
1126 ****************************************************************************/
1128 static bool init_structs(void )
1131 * Set the machine NETBIOS name if not already
1132 * set from the config file.
1138 if (!secrets_init())
1144 static void smbd_parent_sig_term_handler(struct tevent_context *ev,
1145 struct tevent_signal *se,
1151 exit_server_cleanly("termination signal");
1154 static void smbd_parent_sig_hup_handler(struct tevent_context *ev,
1155 struct tevent_signal *se,
1161 struct smbd_parent_context *parent =
1162 talloc_get_type_abort(private_data,
1163 struct smbd_parent_context);
1165 change_to_root_user();
1166 DEBUG(1,("parent: Reloading services after SIGHUP\n"));
1167 reload_services(NULL, NULL, false);
1169 printing_subsystem_update(parent->ev_ctx, parent->msg_ctx, true);
1172 /****************************************************************************
1174 ****************************************************************************/
1176 /* Declare prototype for build_options() to avoid having to run it through
1177 mkproto.h. Mixing $(builddir) and $(srcdir) source files in the current
1178 prototype generation system is too complicated. */
1180 extern void build_options(bool screen);
1182 int main(int argc,const char *argv[])
1184 /* shall I run as a daemon */
1185 bool is_daemon = false;
1186 bool interactive = false;
1188 bool no_process_group = false;
1189 bool log_stdout = false;
1191 char *profile_level = NULL;
1194 bool print_build_options = False;
1199 OPT_NO_PROCESS_GROUP,
1202 struct poptOption long_options[] = {
1204 {"daemon", 'D', POPT_ARG_NONE, NULL, OPT_DAEMON, "Become a daemon (default)" },
1205 {"interactive", 'i', POPT_ARG_NONE, NULL, OPT_INTERACTIVE, "Run interactive (not a daemon)"},
1206 {"foreground", 'F', POPT_ARG_NONE, NULL, OPT_FORK, "Run daemon in foreground (for daemontools, etc.)" },
1207 {"no-process-group", '\0', POPT_ARG_NONE, NULL, OPT_NO_PROCESS_GROUP, "Don't create a new process group" },
1208 {"log-stdout", 'S', POPT_ARG_NONE, NULL, OPT_LOG_STDOUT, "Log to stdout" },
1209 {"build-options", 'b', POPT_ARG_NONE, NULL, 'b', "Print build options" },
1210 {"port", 'p', POPT_ARG_STRING, &ports, 0, "Listen on the specified ports"},
1211 {"profiling-level", 'P', POPT_ARG_STRING, &profile_level, 0, "Set profiling level","PROFILE_LEVEL"},
1215 struct smbd_parent_context *parent = NULL;
1218 struct tevent_context *ev_ctx;
1219 struct messaging_context *msg_ctx;
1220 struct server_id server_id;
1221 struct tevent_signal *se;
1222 int profiling_level;
1223 char *np_dir = NULL;
1224 static const struct smbd_shim smbd_shim_fns =
1226 .cancel_pending_lock_requests_by_fid = smbd_cancel_pending_lock_requests_by_fid,
1227 .send_stat_cache_delete_message = smbd_send_stat_cache_delete_message,
1228 .change_to_root_user = smbd_change_to_root_user,
1229 .become_authenticated_pipe_user = smbd_become_authenticated_pipe_user,
1230 .unbecome_authenticated_pipe_user = smbd_unbecome_authenticated_pipe_user,
1232 .contend_level2_oplocks_begin = smbd_contend_level2_oplocks_begin,
1233 .contend_level2_oplocks_end = smbd_contend_level2_oplocks_end,
1235 .become_root = smbd_become_root,
1236 .unbecome_root = smbd_unbecome_root,
1238 .exit_server = smbd_exit_server,
1239 .exit_server_cleanly = smbd_exit_server_cleanly,
1243 * Do this before any other talloc operation
1245 talloc_enable_null_tracking();
1246 frame = talloc_stackframe();
1248 setup_logging(argv[0], DEBUG_DEFAULT_STDOUT);
1252 set_smbd_shim(&smbd_shim_fns);
1254 smbd_init_globals();
1258 #ifdef HAVE_SET_AUTH_PARAMETERS
1259 set_auth_parameters(argc,argv);
1262 pc = poptGetContext("smbd", argc, argv, long_options, 0);
1263 while((opt = poptGetNextOpt(pc)) != -1) {
1268 case OPT_INTERACTIVE:
1274 case OPT_NO_PROCESS_GROUP:
1275 no_process_group = true;
1277 case OPT_LOG_STDOUT:
1281 print_build_options = True;
1284 d_fprintf(stderr, "\nInvalid option %s: %s\n\n",
1285 poptBadOption(pc, 0), poptStrerror(opt));
1286 poptPrintUsage(pc, stderr, 0);
1290 poptFreeContext(pc);
1298 setup_logging(argv[0], DEBUG_STDOUT);
1300 setup_logging(argv[0], DEBUG_FILE);
1303 if (print_build_options) {
1304 build_options(True); /* Display output to screen as well as debug */
1309 /* needed for SecureWare on SCO */
1313 set_remote_machine_name("smbd", False);
1315 if (interactive && (DEBUGLEVEL >= 9)) {
1316 talloc_enable_leak_report();
1319 if (log_stdout && Fork) {
1320 DEBUG(0,("ERROR: Can't log to stdout (-S) unless daemon is in foreground (-F) or interactive (-i)\n"));
1325 * We want to die early if we can't open /dev/urandom
1327 generate_random_buffer(NULL, 0);
1329 /* get initial effective uid and gid */
1332 /* make absolutely sure we run as root - to handle cases where people
1333 are crazy enough to have it setuid */
1334 gain_root_privilege();
1335 gain_root_group_privilege();
1338 dump_core_setup("smbd", lp_logfile(talloc_tos()));
1340 /* we are never interested in SIGPIPE */
1341 BlockSignals(True,SIGPIPE);
1344 /* we are never interested in SIGFPE */
1345 BlockSignals(True,SIGFPE);
1348 #if defined(SIGUSR2)
1349 /* We are no longer interested in USR2 */
1350 BlockSignals(True,SIGUSR2);
1353 /* POSIX demands that signals are inherited. If the invoking process has
1354 * these signals masked, we will have problems, as we won't recieve them. */
1355 BlockSignals(False, SIGHUP);
1356 BlockSignals(False, SIGUSR1);
1357 BlockSignals(False, SIGTERM);
1359 /* Ensure we leave no zombies until we
1360 * correctly set up child handling below. */
1364 /* we want total control over the permissions on created files,
1365 so set our umask to 0 */
1370 DEBUG(0,("smbd version %s started.\n", samba_version_string()));
1371 DEBUGADD(0,("%s\n", COPYRIGHT_STARTUP_MESSAGE));
1373 DEBUG(2,("uid=%d gid=%d euid=%d egid=%d\n",
1374 (int)getuid(),(int)getgid(),(int)geteuid(),(int)getegid()));
1376 /* Output the build options to the debug log */
1377 build_options(False);
1379 if (sizeof(uint16_t) < 2 || sizeof(uint32_t) < 4) {
1380 DEBUG(0,("ERROR: Samba is not configured correctly for the word size on your machine\n"));
1384 if (!lp_load_initial_only(get_dyn_CONFIGFILE())) {
1385 DEBUG(0, ("error opening config file '%s'\n", get_dyn_CONFIGFILE()));
1389 if (!cluster_probe_ok()) {
1393 /* Init the security context and global current_user */
1397 * Initialize the event context. The event context needs to be
1398 * initialized before the messaging context, cause the messaging
1399 * context holds an event context.
1400 * FIXME: This should be s3_tevent_context_init()
1402 ev_ctx = server_event_context();
1403 if (ev_ctx == NULL) {
1408 * Init the messaging context
1409 * FIXME: This should only call messaging_init()
1411 msg_ctx = server_messaging_context();
1412 if (msg_ctx == NULL) {
1417 * Reloading of the printers will not work here as we don't have a
1418 * server info and rpc services set up. It will be called later.
1420 if (!reload_services(NULL, NULL, false)) {
1424 if (lp_server_role() == ROLE_ACTIVE_DIRECTORY_DC
1425 && !lp_parm_bool(-1, "server role check", "inhibit", false)) {
1426 DEBUG(0, ("server role = 'active directory domain controller' not compatible with running smbd standalone. \n"));
1427 DEBUGADD(0, ("You should start 'samba' instead, and it will control starting smbd if required\n"));
1431 /* ...NOTE... Log files are working from this point! */
1433 DEBUG(3,("loaded services\n"));
1437 if (!profile_setup(msg_ctx, False)) {
1438 DEBUG(0,("ERROR: failed to setup profiling\n"));
1442 if (profile_level != NULL) {
1443 profiling_level = atoi(profile_level);
1445 profiling_level = lp_smbd_profiling_level();
1447 set_profile_level(profiling_level, messaging_server_id(msg_ctx));
1449 if (!is_daemon && !is_a_socket(0)) {
1451 DEBUG(3, ("Standard input is not a socket, "
1452 "assuming -D option\n"));
1456 * Setting is_daemon here prevents us from eventually calling
1457 * the open_sockets_inetd()
1463 if (is_daemon && !interactive) {
1464 DEBUG(3, ("Becoming a daemon.\n"));
1465 become_daemon(Fork, no_process_group, log_stdout);
1470 * If we're interactive we want to set our own process group for
1471 * signal management.
1473 if (interactive && !no_process_group)
1474 setpgid( (pid_t)0, (pid_t)0);
1477 if (!directory_exist(lp_lock_directory()))
1478 mkdir(lp_lock_directory(), 0755);
1480 if (!directory_exist(lp_pid_directory()))
1481 mkdir(lp_pid_directory(), 0755);
1484 pidfile_create(lp_pid_directory(), "smbd");
1486 status = reinit_after_fork(msg_ctx, ev_ctx, false, NULL);
1487 if (!NT_STATUS_IS_OK(status)) {
1488 exit_daemon("reinit_after_fork() failed", map_errno_from_nt_status(status));
1493 * Do not initialize the parent-child-pipe before becoming a
1494 * daemon: this is used to detect a died parent in the child
1497 status = init_before_fork();
1498 if (!NT_STATUS_IS_OK(status)) {
1499 exit_daemon(nt_errstr(status), map_errno_from_nt_status(status));
1503 parent = talloc_zero(ev_ctx, struct smbd_parent_context);
1505 exit_server("talloc(struct smbd_parent_context) failed");
1507 parent->interactive = interactive;
1508 parent->ev_ctx = ev_ctx;
1509 parent->msg_ctx = msg_ctx;
1512 se = tevent_add_signal(parent->ev_ctx,
1515 smbd_parent_sig_term_handler,
1518 exit_server("failed to setup SIGTERM handler");
1520 se = tevent_add_signal(parent->ev_ctx,
1523 smbd_parent_sig_hup_handler,
1526 exit_server("failed to setup SIGHUP handler");
1529 /* Setup all the TDB's - including CLEAR_IF_FIRST tdb's. */
1531 if (smbd_memcache() == NULL) {
1532 exit_daemon("no memcache available", EACCES);
1535 memcache_set_global(smbd_memcache());
1537 /* Initialise the password backed before the global_sam_sid
1538 to ensure that we fetch from ldap before we make a domain sid up */
1540 if(!initialize_password_db(false, ev_ctx))
1543 if (!secrets_init()) {
1544 exit_daemon("smbd can not open secrets.tdb", EACCES);
1547 if (lp_server_role() == ROLE_DOMAIN_BDC || lp_server_role() == ROLE_DOMAIN_PDC) {
1548 struct loadparm_context *lp_ctx = loadparm_init_s3(NULL, loadparm_s3_helpers());
1549 if (!open_schannel_session_store(NULL, lp_ctx)) {
1550 exit_daemon("ERROR: Samba cannot open schannel store for secured NETLOGON operations.", EACCES);
1552 TALLOC_FREE(lp_ctx);
1555 if(!get_global_sam_sid()) {
1556 exit_daemon("Samba cannot create a SAM SID", EACCES);
1559 server_id = messaging_server_id(msg_ctx);
1560 status = smbXsrv_version_global_init(&server_id);
1561 if (!NT_STATUS_IS_OK(status)) {
1562 exit_daemon("Samba cannot init server context", EACCES);
1565 status = smbXsrv_session_global_init();
1566 if (!NT_STATUS_IS_OK(status)) {
1567 exit_daemon("Samba cannot init session context", EACCES);
1570 status = smbXsrv_tcon_global_init();
1571 if (!NT_STATUS_IS_OK(status)) {
1572 exit_daemon("Samba cannot init tcon context", EACCES);
1575 if (!locking_init())
1576 exit_daemon("Samba cannot init locking", EACCES);
1578 if (!leases_db_init(false)) {
1579 exit_daemon("Samba cannot init leases", EACCES);
1582 if (!smbd_notifyd_init(msg_ctx, interactive)) {
1583 exit_daemon("Samba cannot init notification", EACCES);
1586 if (!cleanupd_init(msg_ctx, interactive, &parent->cleanupd)) {
1587 exit_daemon("Samba cannot init the cleanupd", EACCES);
1590 if (!messaging_parent_dgm_cleanup_init(msg_ctx)) {
1594 if (!smbd_scavenger_init(NULL, msg_ctx, ev_ctx)) {
1595 exit_daemon("Samba cannot init scavenging", EACCES);
1598 if (!serverid_parent_init(ev_ctx)) {
1599 exit_daemon("Samba cannot init server id", EACCES);
1602 if (!W_ERROR_IS_OK(registry_init_full()))
1603 exit_daemon("Samba cannot init registry", EACCES);
1605 /* Open the share_info.tdb here, so we don't have to open
1606 after the fork on every single connection. This is a small
1607 performance improvment and reduces the total number of system
1609 if (!share_info_db_init()) {
1610 exit_daemon("ERROR: failed to load share info db.", EACCES);
1613 status = init_system_session_info();
1614 if (!NT_STATUS_IS_OK(status)) {
1615 DEBUG(1, ("ERROR: failed to setup system user info: %s.\n",
1616 nt_errstr(status)));
1620 if (!init_guest_info()) {
1621 DEBUG(0,("ERROR: failed to setup guest info.\n"));
1625 if (!file_init_global()) {
1626 DEBUG(0, ("ERROR: file_init_global() failed\n"));
1629 status = smbXsrv_open_global_init();
1630 if (!NT_STATUS_IS_OK(status)) {
1631 exit_daemon("Samba cannot init global open", map_errno_from_nt_status(status));
1634 /* This MUST be done before start_epmd() because otherwise
1635 * start_epmd() forks and races against dcesrv_ep_setup() to
1636 * call directory_create_or_exist() */
1637 if (!directory_create_or_exist(lp_ncalrpc_dir(), 0755)) {
1638 DEBUG(0, ("Failed to create pipe directory %s - %s\n",
1639 lp_ncalrpc_dir(), strerror(errno)));
1643 np_dir = talloc_asprintf(talloc_tos(), "%s/np", lp_ncalrpc_dir());
1645 DEBUG(0, ("%s: Out of memory\n", __location__));
1649 if (!directory_create_or_exist_strict(np_dir, geteuid(), 0700)) {
1650 DEBUG(0, ("Failed to create pipe directory %s - %s\n",
1651 np_dir, strerror(errno)));
1655 if (is_daemon && !interactive) {
1656 if (rpc_epmapper_daemon() == RPC_DAEMON_FORK) {
1657 start_epmd(ev_ctx, msg_ctx);
1661 if (!dcesrv_ep_setup(ev_ctx, msg_ctx)) {
1662 exit_daemon("Samba cannot setup ep pipe", EACCES);
1665 if (is_daemon && !interactive) {
1666 daemon_ready("smbd");
1669 /* only start other daemons if we are running as a daemon
1670 * -- bad things will happen if smbd is launched via inetd
1671 * and we fork a copy of ourselves here */
1672 if (is_daemon && !interactive) {
1674 if (rpc_lsasd_daemon() == RPC_DAEMON_FORK) {
1675 start_lsasd(ev_ctx, msg_ctx);
1678 if (rpc_fss_daemon() == RPC_DAEMON_FORK) {
1679 start_fssd(ev_ctx, msg_ctx);
1682 if (!lp__disable_spoolss() &&
1683 (rpc_spoolss_daemon() != RPC_DAEMON_DISABLED)) {
1684 bool bgq = lp_parm_bool(-1, "smbd", "backgroundqueue", true);
1686 if (!printing_subsystem_init(ev_ctx, msg_ctx, true, bgq)) {
1687 exit_daemon("Samba failed to init printing subsystem", EACCES);
1691 #ifdef WITH_SPOTLIGHT
1692 if ((rpc_mdssvc_mode() == RPC_SERVICE_MODE_EXTERNAL) &&
1693 (rpc_mdssd_daemon() == RPC_DAEMON_FORK)) {
1694 start_mdssd(ev_ctx, msg_ctx);
1697 } else if (!lp__disable_spoolss() &&
1698 (rpc_spoolss_daemon() != RPC_DAEMON_DISABLED)) {
1699 if (!printing_subsystem_init(ev_ctx, msg_ctx, false, false)) {
1710 /* Started from inetd. fd 0 is the socket. */
1711 /* We will abort gracefully when the client or remote system
1715 /* close stdin, stdout (if not logging to it), but not stderr */
1716 close_low_fds(true, !debug_get_output_is_stdout(), false);
1723 smbd_setup_sig_chld_handler(parent);
1725 smbd_process(ev_ctx, msg_ctx, sock, true);
1727 exit_server_cleanly(NULL);
1731 if (!open_sockets_smbd(parent, ev_ctx, msg_ctx, ports))
1732 exit_server("open_sockets_smbd() failed");
1734 /* do a printer update now that all messaging has been set up,
1735 * before we allow clients to start connecting */
1736 if (!lp__disable_spoolss() &&
1737 (rpc_spoolss_daemon() != RPC_DAEMON_DISABLED)) {
1738 printing_subsystem_update(ev_ctx, msg_ctx, false);
1742 /* make sure we always have a valid stackframe */
1743 frame = talloc_stackframe();
1746 /* if we are running in the foreground then look for
1747 EOF on stdin, and exit if it happens. This allows
1748 us to die if the parent process dies
1749 Only do this on a pipe or socket, no other device.
1752 if (fstat(0, &st) != 0) {
1755 if (S_ISFIFO(st.st_mode) || S_ISSOCK(st.st_mode)) {
1756 tevent_add_fd(ev_ctx,
1765 smbd_parent_loop(ev_ctx, parent);
1767 exit_server_cleanly(NULL);