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 DEBUG(1,("Cleaning up brl and lock database after unclean shutdown\n"));
549 message_send_all(parent->msg_ctx, MSG_SMB_UNLOCK, NULL, 0, NULL);
551 messaging_send_buf(parent->msg_ctx, parent->cleanupd,
552 MSG_SMB_UNLOCK, NULL, 0);
555 static void remove_child_pid(struct smbd_parent_context *parent,
557 bool unclean_shutdown)
559 struct smbd_child_pid *child;
563 iov[0] = (struct iovec) { .iov_base = (uint8_t *)&pid,
564 .iov_len = sizeof(pid) };
565 iov[1] = (struct iovec) { .iov_base = (uint8_t *)&unclean_shutdown,
566 .iov_len = sizeof(bool) };
568 status = messaging_send_iov(parent->msg_ctx, parent->cleanupd,
569 MSG_SMB_NOTIFY_CLEANUP,
570 iov, ARRAY_SIZE(iov), NULL, 0);
571 DEBUG(10, ("messaging_send_iov returned %s\n", nt_errstr(status)));
573 for (child = parent->children; child != NULL; child = child->next) {
574 if (child->pid == pid) {
575 struct smbd_child_pid *tmp = child;
576 DLIST_REMOVE(parent->children, child);
578 parent->num_children -= 1;
584 /* not all forked child processes are added to the children list */
585 DEBUG(2, ("Could not find child %d -- ignoring\n", (int)pid));
589 if (unclean_shutdown) {
590 /* a child terminated uncleanly so tickle all
591 processes to see if they can grab any of the
594 DEBUG(3,(__location__ " Unclean shutdown of pid %u\n",
596 if (parent->cleanup_te == NULL) {
597 /* call the cleanup timer, but not too often */
598 int cleanup_time = lp_parm_int(-1, "smbd", "cleanuptime", 20);
599 parent->cleanup_te = tevent_add_timer(parent->ev_ctx,
601 timeval_current_ofs(cleanup_time, 0),
604 DEBUG(1,("Scheduled cleanup of brl and lock database after unclean shutdown\n"));
609 /****************************************************************************
610 Have we reached the process limit ?
611 ****************************************************************************/
613 static bool allowable_number_of_smbd_processes(struct smbd_parent_context *parent)
615 int max_processes = lp_max_smbd_processes();
620 return parent->num_children < max_processes;
623 static void smbd_sig_chld_handler(struct tevent_context *ev,
624 struct tevent_signal *se,
632 struct smbd_parent_context *parent =
633 talloc_get_type_abort(private_data,
634 struct smbd_parent_context);
636 while ((pid = sys_waitpid(-1, &status, WNOHANG)) > 0) {
637 bool unclean_shutdown = False;
639 /* If the child terminated normally, assume
640 it was an unclean shutdown unless the
643 if (WIFEXITED(status)) {
644 unclean_shutdown = WEXITSTATUS(status);
646 /* If the child terminated due to a signal
647 we always assume it was unclean.
649 if (WIFSIGNALED(status)) {
650 unclean_shutdown = True;
652 remove_child_pid(parent, pid, unclean_shutdown);
656 static void smbd_setup_sig_chld_handler(struct smbd_parent_context *parent)
658 struct tevent_signal *se;
660 se = tevent_add_signal(parent->ev_ctx,
661 parent, /* mem_ctx */
663 smbd_sig_chld_handler,
666 exit_server("failed to setup SIGCHLD handler");
670 static void smbd_open_socket_close_fn(struct tevent_context *ev,
671 struct tevent_fd *fde,
675 /* this might be the socket_wrapper swrap_close() */
679 static void smbd_accept_connection(struct tevent_context *ev,
680 struct tevent_fd *fde,
684 struct smbd_open_socket *s = talloc_get_type_abort(private_data,
685 struct smbd_open_socket);
686 struct messaging_context *msg_ctx = s->parent->msg_ctx;
687 struct sockaddr_storage addr;
688 socklen_t in_addrlen = sizeof(addr);
692 fd = accept(s->fd, (struct sockaddr *)(void *)&addr,&in_addrlen);
693 if (fd == -1 && errno == EINTR)
697 DEBUG(0,("accept: %s\n",
702 if (s->parent->interactive) {
703 reinit_after_fork(msg_ctx, ev, true, NULL);
704 smbd_process(ev, msg_ctx, fd, true);
705 exit_server_cleanly("end of interactive mode");
709 if (!allowable_number_of_smbd_processes(s->parent)) {
716 NTSTATUS status = NT_STATUS_OK;
719 * Can't use TALLOC_FREE here. Nulling out the argument to it
720 * would overwrite memory we've just freed.
722 talloc_free(s->parent);
725 /* Stop zombies, the parent explicitly handles
726 * them, counting worker smbds. */
729 status = smbd_reinit_after_fork(msg_ctx, ev, true, NULL);
730 if (!NT_STATUS_IS_OK(status)) {
731 if (NT_STATUS_EQUAL(status,
732 NT_STATUS_TOO_MANY_OPENED_FILES)) {
733 DEBUG(0,("child process cannot initialize "
734 "because too many files are open\n"));
737 if (lp_clustering() &&
738 NT_STATUS_EQUAL(status,
739 NT_STATUS_INTERNAL_DB_ERROR)) {
740 DEBUG(1,("child process cannot initialize "
741 "because connection to CTDB "
746 DEBUG(0,("reinit_after_fork() failed\n"));
747 smb_panic("reinit_after_fork() failed");
750 smbd_process(ev, msg_ctx, fd, false);
752 exit_server_cleanly("end of child");
757 DEBUG(0,("smbd_accept_connection: fork() failed: %s\n",
761 /* The parent doesn't need this socket */
764 /* Sun May 6 18:56:14 2001 ackley@cs.unm.edu:
765 Clear the closed fd info out of server_fd --
766 and more importantly, out of client_fd in
767 util_sock.c, to avoid a possible
768 getpeername failure if we reopen the logs
769 and use %I in the filename.
773 add_child_pid(s->parent, pid);
776 /* Force parent to check log size after
777 * spawning child. Fix from
778 * klausr@ITAP.Physik.Uni-Stuttgart.De. The
779 * parent smbd will log to logserver.smb. It
780 * writes only two messages for each child
781 * started/finished. But each child writes,
782 * say, 50 messages also in logserver.smb,
783 * begining with the debug_count of the
784 * parent, before the child opens its own log
785 * file logserver.client. In a worst case
786 * scenario the size of logserver.smb would be
787 * checked after about 50*50=2500 messages
790 force_check_log_size();
793 static bool smbd_open_one_socket(struct smbd_parent_context *parent,
794 struct tevent_context *ev_ctx,
795 const struct sockaddr_storage *ifss,
798 struct smbd_open_socket *s;
800 s = talloc(parent, struct smbd_open_socket);
806 s->fd = open_socket_in(SOCK_STREAM,
808 parent->sockets == NULL ? 0 : 2,
812 DEBUG(0,("smbd_open_one_socket: open_socket_in: "
813 "%s\n", strerror(errno)));
816 * We ignore an error here, as we've done before
821 /* ready to listen */
822 set_socket_options(s->fd, "SO_KEEPALIVE");
823 set_socket_options(s->fd, lp_socket_options());
825 /* Set server socket to
826 * non-blocking for the accept. */
827 set_blocking(s->fd, False);
829 if (listen(s->fd, SMBD_LISTEN_BACKLOG) == -1) {
830 DEBUG(0,("smbd_open_one_socket: listen: "
831 "%s\n", strerror(errno)));
837 s->fde = tevent_add_fd(ev_ctx,
839 s->fd, TEVENT_FD_READ,
840 smbd_accept_connection,
843 DEBUG(0,("smbd_open_one_socket: "
844 "tevent_add_fd: %s\n",
850 tevent_fd_set_close_fn(s->fde, smbd_open_socket_close_fn);
852 DLIST_ADD_END(parent->sockets, s, struct smbd_open_socket *);
857 /****************************************************************************
858 Open the socket communication.
859 ****************************************************************************/
861 static bool open_sockets_smbd(struct smbd_parent_context *parent,
862 struct tevent_context *ev_ctx,
863 struct messaging_context *msg_ctx,
864 const char *smb_ports)
866 int num_interfaces = iface_count();
869 unsigned dns_port = 0;
876 smbd_setup_sig_chld_handler(parent);
878 ports = lp_smb_ports();
880 /* use a reasonable default set of ports - listing on 445 and 139 */
883 l = str_list_make_v3(talloc_tos(), smb_ports, NULL);
884 ports = discard_const_p(const char *, l);
887 for (j = 0; ports && ports[j]; j++) {
888 unsigned port = atoi(ports[j]);
890 if (port == 0 || port > 0xffff) {
891 exit_server_cleanly("Invalid port in the config or on "
892 "the commandline specified!");
896 if (lp_interfaces() && lp_bind_interfaces_only()) {
897 /* We have been given an interfaces line, and been
898 told to only bind to those interfaces. Create a
899 socket per interface and bind to only these.
902 /* Now open a listen socket for each of the
904 for(i = 0; i < num_interfaces; i++) {
905 const struct sockaddr_storage *ifss =
906 iface_n_sockaddr_storage(i);
908 DEBUG(0,("open_sockets_smbd: "
909 "interface %d has NULL IP address !\n",
914 for (j = 0; ports && ports[j]; j++) {
915 unsigned port = atoi(ports[j]);
917 /* Keep the first port for mDNS service
924 if (!smbd_open_one_socket(parent,
933 /* Just bind to 0.0.0.0 - accept connections
936 const char *sock_addr;
938 const char *sock_ptr;
941 sock_addr = "::,0.0.0.0";
943 sock_addr = "0.0.0.0";
946 for (sock_ptr=sock_addr;
947 next_token_talloc(talloc_tos(), &sock_ptr, &sock_tok, " \t,"); ) {
948 for (j = 0; ports && ports[j]; j++) {
949 struct sockaddr_storage ss;
950 unsigned port = atoi(ports[j]);
952 /* Keep the first port for mDNS service
959 /* open an incoming socket */
960 if (!interpret_string_addr(&ss, sock_tok,
961 AI_NUMERICHOST|AI_PASSIVE)) {
966 * If we fail to open any sockets
967 * in this loop the parent-sockets == NULL
968 * case below will prevent us from starting.
971 (void)smbd_open_one_socket(parent,
979 if (parent->sockets == NULL) {
980 DEBUG(0,("open_sockets_smbd: No "
981 "sockets available to bind to.\n"));
985 /* Setup the main smbd so that we can get messages. Note that
986 do this after starting listening. This is needed as when in
987 clustered mode, ctdb won't allow us to start doing database
988 operations until it has gone thru a full startup, which
989 includes checking to see that smbd is listening. */
991 if (!serverid_register(messaging_server_id(msg_ctx),
992 FLAG_MSG_GENERAL|FLAG_MSG_SMBD
993 |FLAG_MSG_PRINT_GENERAL
995 DEBUG(0, ("open_sockets_smbd: Failed to register "
996 "myself in serverid.tdb\n"));
1000 /* Listen to messages */
1002 messaging_register(msg_ctx, NULL, MSG_SHUTDOWN, msg_exit_server);
1003 messaging_register(msg_ctx, ev_ctx, MSG_SMB_CONF_UPDATED,
1004 smbd_parent_conf_updated);
1005 messaging_register(msg_ctx, NULL, MSG_SMB_STAT_CACHE_DELETE,
1006 smb_stat_cache_delete);
1007 messaging_register(msg_ctx, NULL, MSG_DEBUG, smbd_msg_debug);
1008 messaging_register(msg_ctx, NULL, MSG_SMB_FORCE_TDIS,
1009 smb_parent_send_to_children);
1010 messaging_register(msg_ctx, NULL, MSG_SMB_KILL_CLIENT_IP,
1011 smb_parent_send_to_children);
1012 messaging_register(msg_ctx, NULL, MSG_SMB_TELL_NUM_CHILDREN,
1013 smb_tell_num_children);
1015 messaging_register(msg_ctx, NULL,
1016 ID_CACHE_DELETE, smbd_parent_id_cache_delete);
1017 messaging_register(msg_ctx, NULL,
1018 ID_CACHE_KILL, smbd_parent_id_cache_kill);
1020 #ifdef CLUSTER_SUPPORT
1021 if (lp_clustering()) {
1022 struct ctdbd_connection *conn = messaging_ctdbd_connection();
1024 register_with_ctdbd(conn, CTDB_SRVID_RECONFIGURE,
1025 smbd_parent_ctdb_reconfigured, msg_ctx);
1026 register_with_ctdbd(conn, CTDB_SRVID_SAMBA_NOTIFY,
1027 smbd_parent_ctdb_reconfigured, msg_ctx);
1032 messaging_register(msg_ctx, NULL, MSG_SMB_INJECT_FAULT,
1036 if (lp_multicast_dns_register() && (dns_port != 0)) {
1037 #ifdef WITH_DNSSD_SUPPORT
1038 smbd_setup_mdns_registration(ev_ctx,
1041 #ifdef WITH_AVAHI_SUPPORT
1044 avahi_conn = avahi_start_register(ev_ctx,
1047 if (avahi_conn == NULL) {
1048 DEBUG(10, ("avahi_start_register failed\n"));
1058 handle stdin becoming readable when we are in --foreground mode
1060 static void smbd_stdin_handler(struct tevent_context *ev,
1061 struct tevent_fd *fde,
1066 if (read(0, &c, 1) != 1) {
1067 /* we have reached EOF on stdin, which means the
1068 parent has exited. Shutdown the server */
1069 exit_server_cleanly("EOF on stdin");
1073 struct smbd_parent_tevent_trace_state {
1077 static void smbd_parent_tevent_trace_callback(enum tevent_trace_point point,
1080 struct smbd_parent_tevent_trace_state *state =
1081 (struct smbd_parent_tevent_trace_state *)private_data;
1084 case TEVENT_TRACE_BEFORE_WAIT:
1086 case TEVENT_TRACE_AFTER_WAIT:
1088 case TEVENT_TRACE_BEFORE_LOOP_ONCE:
1089 TALLOC_FREE(state->frame);
1090 state->frame = talloc_stackframe();
1092 case TEVENT_TRACE_AFTER_LOOP_ONCE:
1093 TALLOC_FREE(state->frame);
1100 static void smbd_parent_loop(struct tevent_context *ev_ctx,
1101 struct smbd_parent_context *parent)
1103 struct smbd_parent_tevent_trace_state trace_state = {
1108 tevent_set_trace_callback(ev_ctx, smbd_parent_tevent_trace_callback,
1111 /* now accept incoming connections - forking a new process
1112 for each incoming connection */
1113 DEBUG(2,("waiting for connections\n"));
1115 ret = tevent_loop_wait(ev_ctx);
1117 DEBUG(0, ("tevent_loop_wait failed: %d, %s, exiting\n",
1118 ret, strerror(errno)));
1121 TALLOC_FREE(trace_state.frame);
1123 /* NOTREACHED return True; */
1127 /****************************************************************************
1128 Initialise connect, service and file structs.
1129 ****************************************************************************/
1131 static bool init_structs(void )
1134 * Set the machine NETBIOS name if not already
1135 * set from the config file.
1141 if (!secrets_init())
1147 static void smbd_parent_sig_term_handler(struct tevent_context *ev,
1148 struct tevent_signal *se,
1154 exit_server_cleanly("termination signal");
1157 static void smbd_parent_sig_hup_handler(struct tevent_context *ev,
1158 struct tevent_signal *se,
1164 struct smbd_parent_context *parent =
1165 talloc_get_type_abort(private_data,
1166 struct smbd_parent_context);
1168 change_to_root_user();
1169 DEBUG(1,("parent: Reloading services after SIGHUP\n"));
1170 reload_services(NULL, NULL, false);
1172 printing_subsystem_update(parent->ev_ctx, parent->msg_ctx, true);
1175 /****************************************************************************
1177 ****************************************************************************/
1179 /* Declare prototype for build_options() to avoid having to run it through
1180 mkproto.h. Mixing $(builddir) and $(srcdir) source files in the current
1181 prototype generation system is too complicated. */
1183 extern void build_options(bool screen);
1185 int main(int argc,const char *argv[])
1187 /* shall I run as a daemon */
1188 bool is_daemon = false;
1189 bool interactive = false;
1191 bool no_process_group = false;
1192 bool log_stdout = false;
1194 char *profile_level = NULL;
1197 bool print_build_options = False;
1202 OPT_NO_PROCESS_GROUP,
1205 struct poptOption long_options[] = {
1207 {"daemon", 'D', POPT_ARG_NONE, NULL, OPT_DAEMON, "Become a daemon (default)" },
1208 {"interactive", 'i', POPT_ARG_NONE, NULL, OPT_INTERACTIVE, "Run interactive (not a daemon)"},
1209 {"foreground", 'F', POPT_ARG_NONE, NULL, OPT_FORK, "Run daemon in foreground (for daemontools, etc.)" },
1210 {"no-process-group", '\0', POPT_ARG_NONE, NULL, OPT_NO_PROCESS_GROUP, "Don't create a new process group" },
1211 {"log-stdout", 'S', POPT_ARG_NONE, NULL, OPT_LOG_STDOUT, "Log to stdout" },
1212 {"build-options", 'b', POPT_ARG_NONE, NULL, 'b', "Print build options" },
1213 {"port", 'p', POPT_ARG_STRING, &ports, 0, "Listen on the specified ports"},
1214 {"profiling-level", 'P', POPT_ARG_STRING, &profile_level, 0, "Set profiling level","PROFILE_LEVEL"},
1218 struct smbd_parent_context *parent = NULL;
1221 struct tevent_context *ev_ctx;
1222 struct messaging_context *msg_ctx;
1223 struct server_id server_id;
1224 struct tevent_signal *se;
1225 int profiling_level;
1226 char *np_dir = NULL;
1227 static const struct smbd_shim smbd_shim_fns =
1229 .cancel_pending_lock_requests_by_fid = smbd_cancel_pending_lock_requests_by_fid,
1230 .send_stat_cache_delete_message = smbd_send_stat_cache_delete_message,
1231 .change_to_root_user = smbd_change_to_root_user,
1232 .become_authenticated_pipe_user = smbd_become_authenticated_pipe_user,
1233 .unbecome_authenticated_pipe_user = smbd_unbecome_authenticated_pipe_user,
1235 .contend_level2_oplocks_begin = smbd_contend_level2_oplocks_begin,
1236 .contend_level2_oplocks_end = smbd_contend_level2_oplocks_end,
1238 .become_root = smbd_become_root,
1239 .unbecome_root = smbd_unbecome_root,
1241 .exit_server = smbd_exit_server,
1242 .exit_server_cleanly = smbd_exit_server_cleanly,
1246 * Do this before any other talloc operation
1248 talloc_enable_null_tracking();
1249 frame = talloc_stackframe();
1251 setup_logging(argv[0], DEBUG_DEFAULT_STDOUT);
1255 set_smbd_shim(&smbd_shim_fns);
1257 smbd_init_globals();
1261 #ifdef HAVE_SET_AUTH_PARAMETERS
1262 set_auth_parameters(argc,argv);
1265 pc = poptGetContext("smbd", argc, argv, long_options, 0);
1266 while((opt = poptGetNextOpt(pc)) != -1) {
1271 case OPT_INTERACTIVE:
1277 case OPT_NO_PROCESS_GROUP:
1278 no_process_group = true;
1280 case OPT_LOG_STDOUT:
1284 print_build_options = True;
1287 d_fprintf(stderr, "\nInvalid option %s: %s\n\n",
1288 poptBadOption(pc, 0), poptStrerror(opt));
1289 poptPrintUsage(pc, stderr, 0);
1293 poptFreeContext(pc);
1301 setup_logging(argv[0], DEBUG_STDOUT);
1303 setup_logging(argv[0], DEBUG_FILE);
1306 if (print_build_options) {
1307 build_options(True); /* Display output to screen as well as debug */
1312 /* needed for SecureWare on SCO */
1316 set_remote_machine_name("smbd", False);
1318 if (interactive && (DEBUGLEVEL >= 9)) {
1319 talloc_enable_leak_report();
1322 if (log_stdout && Fork) {
1323 DEBUG(0,("ERROR: Can't log to stdout (-S) unless daemon is in foreground (-F) or interactive (-i)\n"));
1328 * We want to die early if we can't open /dev/urandom
1330 generate_random_buffer(NULL, 0);
1332 /* get initial effective uid and gid */
1335 /* make absolutely sure we run as root - to handle cases where people
1336 are crazy enough to have it setuid */
1337 gain_root_privilege();
1338 gain_root_group_privilege();
1341 dump_core_setup("smbd", lp_logfile(talloc_tos()));
1343 /* we are never interested in SIGPIPE */
1344 BlockSignals(True,SIGPIPE);
1347 /* we are never interested in SIGFPE */
1348 BlockSignals(True,SIGFPE);
1351 #if defined(SIGUSR2)
1352 /* We are no longer interested in USR2 */
1353 BlockSignals(True,SIGUSR2);
1356 /* POSIX demands that signals are inherited. If the invoking process has
1357 * these signals masked, we will have problems, as we won't recieve them. */
1358 BlockSignals(False, SIGHUP);
1359 BlockSignals(False, SIGUSR1);
1360 BlockSignals(False, SIGTERM);
1362 /* Ensure we leave no zombies until we
1363 * correctly set up child handling below. */
1367 /* we want total control over the permissions on created files,
1368 so set our umask to 0 */
1373 DEBUG(0,("smbd version %s started.\n", samba_version_string()));
1374 DEBUGADD(0,("%s\n", COPYRIGHT_STARTUP_MESSAGE));
1376 DEBUG(2,("uid=%d gid=%d euid=%d egid=%d\n",
1377 (int)getuid(),(int)getgid(),(int)geteuid(),(int)getegid()));
1379 /* Output the build options to the debug log */
1380 build_options(False);
1382 if (sizeof(uint16_t) < 2 || sizeof(uint32_t) < 4) {
1383 DEBUG(0,("ERROR: Samba is not configured correctly for the word size on your machine\n"));
1387 if (!lp_load_initial_only(get_dyn_CONFIGFILE())) {
1388 DEBUG(0, ("error opening config file '%s'\n", get_dyn_CONFIGFILE()));
1392 if (!cluster_probe_ok()) {
1396 /* Init the security context and global current_user */
1400 * Initialize the event context. The event context needs to be
1401 * initialized before the messaging context, cause the messaging
1402 * context holds an event context.
1403 * FIXME: This should be s3_tevent_context_init()
1405 ev_ctx = server_event_context();
1406 if (ev_ctx == NULL) {
1411 * Init the messaging context
1412 * FIXME: This should only call messaging_init()
1414 msg_ctx = server_messaging_context();
1415 if (msg_ctx == NULL) {
1420 * Reloading of the printers will not work here as we don't have a
1421 * server info and rpc services set up. It will be called later.
1423 if (!reload_services(NULL, NULL, false)) {
1427 if (lp_server_role() == ROLE_ACTIVE_DIRECTORY_DC
1428 && !lp_parm_bool(-1, "server role check", "inhibit", false)) {
1429 DEBUG(0, ("server role = 'active directory domain controller' not compatible with running smbd standalone. \n"));
1430 DEBUGADD(0, ("You should start 'samba' instead, and it will control starting smbd if required\n"));
1434 /* ...NOTE... Log files are working from this point! */
1436 DEBUG(3,("loaded services\n"));
1440 if (!profile_setup(msg_ctx, False)) {
1441 DEBUG(0,("ERROR: failed to setup profiling\n"));
1445 if (profile_level != NULL) {
1446 profiling_level = atoi(profile_level);
1448 profiling_level = lp_smbd_profiling_level();
1450 set_profile_level(profiling_level, messaging_server_id(msg_ctx));
1452 if (!is_daemon && !is_a_socket(0)) {
1454 DEBUG(3, ("Standard input is not a socket, "
1455 "assuming -D option\n"));
1459 * Setting is_daemon here prevents us from eventually calling
1460 * the open_sockets_inetd()
1466 if (is_daemon && !interactive) {
1467 DEBUG(3, ("Becoming a daemon.\n"));
1468 become_daemon(Fork, no_process_group, log_stdout);
1473 * If we're interactive we want to set our own process group for
1474 * signal management.
1476 if (interactive && !no_process_group)
1477 setpgid( (pid_t)0, (pid_t)0);
1480 if (!directory_exist(lp_lock_directory()))
1481 mkdir(lp_lock_directory(), 0755);
1483 if (!directory_exist(lp_pid_directory()))
1484 mkdir(lp_pid_directory(), 0755);
1487 pidfile_create(lp_pid_directory(), "smbd");
1489 status = reinit_after_fork(msg_ctx, ev_ctx, false, NULL);
1490 if (!NT_STATUS_IS_OK(status)) {
1491 exit_daemon("reinit_after_fork() failed", map_errno_from_nt_status(status));
1496 * Do not initialize the parent-child-pipe before becoming a
1497 * daemon: this is used to detect a died parent in the child
1500 status = init_before_fork();
1501 if (!NT_STATUS_IS_OK(status)) {
1502 exit_daemon(nt_errstr(status), map_errno_from_nt_status(status));
1506 parent = talloc_zero(ev_ctx, struct smbd_parent_context);
1508 exit_server("talloc(struct smbd_parent_context) failed");
1510 parent->interactive = interactive;
1511 parent->ev_ctx = ev_ctx;
1512 parent->msg_ctx = msg_ctx;
1515 se = tevent_add_signal(parent->ev_ctx,
1518 smbd_parent_sig_term_handler,
1521 exit_server("failed to setup SIGTERM handler");
1523 se = tevent_add_signal(parent->ev_ctx,
1526 smbd_parent_sig_hup_handler,
1529 exit_server("failed to setup SIGHUP handler");
1532 /* Setup all the TDB's - including CLEAR_IF_FIRST tdb's. */
1534 if (smbd_memcache() == NULL) {
1535 exit_daemon("no memcache available", EACCES);
1538 memcache_set_global(smbd_memcache());
1540 /* Initialise the password backed before the global_sam_sid
1541 to ensure that we fetch from ldap before we make a domain sid up */
1543 if(!initialize_password_db(false, ev_ctx))
1546 if (!secrets_init()) {
1547 exit_daemon("smbd can not open secrets.tdb", EACCES);
1550 if (lp_server_role() == ROLE_DOMAIN_BDC || lp_server_role() == ROLE_DOMAIN_PDC) {
1551 struct loadparm_context *lp_ctx = loadparm_init_s3(NULL, loadparm_s3_helpers());
1552 if (!open_schannel_session_store(NULL, lp_ctx)) {
1553 exit_daemon("ERROR: Samba cannot open schannel store for secured NETLOGON operations.", EACCES);
1555 TALLOC_FREE(lp_ctx);
1558 if(!get_global_sam_sid()) {
1559 exit_daemon("Samba cannot create a SAM SID", EACCES);
1562 server_id = messaging_server_id(msg_ctx);
1563 status = smbXsrv_version_global_init(&server_id);
1564 if (!NT_STATUS_IS_OK(status)) {
1565 exit_daemon("Samba cannot init server context", EACCES);
1568 status = smbXsrv_session_global_init();
1569 if (!NT_STATUS_IS_OK(status)) {
1570 exit_daemon("Samba cannot init session context", EACCES);
1573 status = smbXsrv_tcon_global_init();
1574 if (!NT_STATUS_IS_OK(status)) {
1575 exit_daemon("Samba cannot init tcon context", EACCES);
1578 if (!locking_init())
1579 exit_daemon("Samba cannot init locking", EACCES);
1581 if (!leases_db_init(false)) {
1582 exit_daemon("Samba cannot init leases", EACCES);
1585 if (!smbd_notifyd_init(msg_ctx, interactive)) {
1586 exit_daemon("Samba cannot init notification", EACCES);
1589 if (!cleanupd_init(msg_ctx, interactive, &parent->cleanupd)) {
1590 exit_daemon("Samba cannot init the cleanupd", EACCES);
1593 if (!messaging_parent_dgm_cleanup_init(msg_ctx)) {
1597 if (!smbd_scavenger_init(NULL, msg_ctx, ev_ctx)) {
1598 exit_daemon("Samba cannot init scavenging", EACCES);
1601 if (!serverid_parent_init(ev_ctx)) {
1602 exit_daemon("Samba cannot init server id", EACCES);
1605 if (!W_ERROR_IS_OK(registry_init_full()))
1606 exit_daemon("Samba cannot init registry", EACCES);
1608 /* Open the share_info.tdb here, so we don't have to open
1609 after the fork on every single connection. This is a small
1610 performance improvment and reduces the total number of system
1612 if (!share_info_db_init()) {
1613 exit_daemon("ERROR: failed to load share info db.", EACCES);
1616 status = init_system_session_info();
1617 if (!NT_STATUS_IS_OK(status)) {
1618 DEBUG(1, ("ERROR: failed to setup system user info: %s.\n",
1619 nt_errstr(status)));
1623 if (!init_guest_info()) {
1624 DEBUG(0,("ERROR: failed to setup guest info.\n"));
1628 if (!file_init_global()) {
1629 DEBUG(0, ("ERROR: file_init_global() failed\n"));
1632 status = smbXsrv_open_global_init();
1633 if (!NT_STATUS_IS_OK(status)) {
1634 exit_daemon("Samba cannot init global open", map_errno_from_nt_status(status));
1637 /* This MUST be done before start_epmd() because otherwise
1638 * start_epmd() forks and races against dcesrv_ep_setup() to
1639 * call directory_create_or_exist() */
1640 if (!directory_create_or_exist(lp_ncalrpc_dir(), 0755)) {
1641 DEBUG(0, ("Failed to create pipe directory %s - %s\n",
1642 lp_ncalrpc_dir(), strerror(errno)));
1646 np_dir = talloc_asprintf(talloc_tos(), "%s/np", lp_ncalrpc_dir());
1648 DEBUG(0, ("%s: Out of memory\n", __location__));
1652 if (!directory_create_or_exist_strict(np_dir, geteuid(), 0700)) {
1653 DEBUG(0, ("Failed to create pipe directory %s - %s\n",
1654 np_dir, strerror(errno)));
1658 if (is_daemon && !interactive) {
1659 if (rpc_epmapper_daemon() == RPC_DAEMON_FORK) {
1660 start_epmd(ev_ctx, msg_ctx);
1664 if (!dcesrv_ep_setup(ev_ctx, msg_ctx)) {
1665 exit_daemon("Samba cannot setup ep pipe", EACCES);
1668 if (is_daemon && !interactive) {
1669 daemon_ready("smbd");
1672 /* only start other daemons if we are running as a daemon
1673 * -- bad things will happen if smbd is launched via inetd
1674 * and we fork a copy of ourselves here */
1675 if (is_daemon && !interactive) {
1677 if (rpc_lsasd_daemon() == RPC_DAEMON_FORK) {
1678 start_lsasd(ev_ctx, msg_ctx);
1681 if (rpc_fss_daemon() == RPC_DAEMON_FORK) {
1682 start_fssd(ev_ctx, msg_ctx);
1685 if (!lp__disable_spoolss() &&
1686 (rpc_spoolss_daemon() != RPC_DAEMON_DISABLED)) {
1687 bool bgq = lp_parm_bool(-1, "smbd", "backgroundqueue", true);
1689 if (!printing_subsystem_init(ev_ctx, msg_ctx, true, bgq)) {
1690 exit_daemon("Samba failed to init printing subsystem", EACCES);
1694 #ifdef WITH_SPOTLIGHT
1695 if ((rpc_mdssvc_mode() == RPC_SERVICE_MODE_EXTERNAL) &&
1696 (rpc_mdssd_daemon() == RPC_DAEMON_FORK)) {
1697 start_mdssd(ev_ctx, msg_ctx);
1700 } else if (!lp__disable_spoolss() &&
1701 (rpc_spoolss_daemon() != RPC_DAEMON_DISABLED)) {
1702 if (!printing_subsystem_init(ev_ctx, msg_ctx, false, false)) {
1713 /* Started from inetd. fd 0 is the socket. */
1714 /* We will abort gracefully when the client or remote system
1718 /* close stdin, stdout (if not logging to it), but not stderr */
1719 close_low_fds(true, !debug_get_output_is_stdout(), false);
1726 smbd_setup_sig_chld_handler(parent);
1728 smbd_process(ev_ctx, msg_ctx, sock, true);
1730 exit_server_cleanly(NULL);
1734 if (!open_sockets_smbd(parent, ev_ctx, msg_ctx, ports))
1735 exit_server("open_sockets_smbd() failed");
1737 /* do a printer update now that all messaging has been set up,
1738 * before we allow clients to start connecting */
1739 if (!lp__disable_spoolss() &&
1740 (rpc_spoolss_daemon() != RPC_DAEMON_DISABLED)) {
1741 printing_subsystem_update(ev_ctx, msg_ctx, false);
1745 /* make sure we always have a valid stackframe */
1746 frame = talloc_stackframe();
1749 /* if we are running in the foreground then look for
1750 EOF on stdin, and exit if it happens. This allows
1751 us to die if the parent process dies
1752 Only do this on a pipe or socket, no other device.
1755 if (fstat(0, &st) != 0) {
1758 if (S_ISFIFO(st.st_mode) || S_ISSOCK(st.st_mode)) {
1759 tevent_add_fd(ev_ctx,
1768 smbd_parent_loop(ev_ctx, parent);
1770 exit_server_cleanly(NULL);