Line data Source code
1 : /*
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
9 :
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.
14 :
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.
19 :
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/>.
22 : */
23 :
24 : #include "includes.h"
25 : #include "system/filesys.h"
26 : #include "lib/util/server_id.h"
27 : #include "lib/util/close_low_fd.h"
28 : #include "lib/cmdline/cmdline.h"
29 : #include "locking/share_mode_lock.h"
30 : #include "smbd/smbd.h"
31 : #include "smbd/globals.h"
32 : #include "source3/smbd/smbXsrv_session.h"
33 : #include "smbd/smbXsrv_open.h"
34 : #include "registry/reg_init_full.h"
35 : #include "libcli/auth/schannel.h"
36 : #include "secrets.h"
37 : #include "../lib/util/memcache.h"
38 : #include "ctdbd_conn.h"
39 : #include "lib/util/util_process.h"
40 : #include "util_cluster.h"
41 : #include "printing/queue_process.h"
42 : #include "rpc_server/rpc_config.h"
43 : #include "passdb.h"
44 : #include "auth.h"
45 : #include "messages.h"
46 : #include "messages_ctdb.h"
47 : #include "smbprofile.h"
48 : #include "lib/id_cache.h"
49 : #include "lib/param/param.h"
50 : #include "lib/background.h"
51 : #include "../lib/util/pidfile.h"
52 : #include "lib/smbd_shim.h"
53 : #include "scavenger.h"
54 : #include "locking/leases_db.h"
55 : #include "smbd/notifyd/notifyd.h"
56 : #include "smbd/smbd_cleanupd.h"
57 : #include "lib/util/sys_rw.h"
58 : #include "cleanupdb.h"
59 : #include "g_lock.h"
60 : #include "lib/global_contexts.h"
61 : #include "source3/lib/substitute.h"
62 : #include "lib/addrchange.h"
63 :
64 : #ifdef CLUSTER_SUPPORT
65 : #include "ctdb_protocol.h"
66 : #endif
67 :
68 : struct smbd_open_socket;
69 : struct smbd_child_pid;
70 :
71 : struct smbd_parent_context {
72 : bool interactive;
73 :
74 : struct tevent_context *ev_ctx;
75 : struct messaging_context *msg_ctx;
76 :
77 : /* the list of listening sockets */
78 : struct smbd_open_socket *sockets;
79 :
80 : /* the list of current child processes */
81 : struct smbd_child_pid *children;
82 : size_t num_children;
83 :
84 : struct server_id cleanupd;
85 : struct server_id notifyd;
86 :
87 : struct tevent_timer *cleanup_te;
88 : };
89 :
90 : struct smbd_open_socket {
91 : struct smbd_open_socket *prev, *next;
92 : struct smbd_parent_context *parent;
93 : int fd;
94 : struct tevent_fd *fde;
95 : };
96 :
97 : struct smbd_child_pid {
98 : struct smbd_child_pid *prev, *next;
99 : pid_t pid;
100 : };
101 :
102 : /*******************************************************************
103 : What to do when smb.conf is updated.
104 : ********************************************************************/
105 :
106 : static NTSTATUS messaging_send_to_children(struct messaging_context *msg_ctx,
107 : uint32_t msg_type, DATA_BLOB* data);
108 :
109 112 : static void smbd_parent_conf_updated(struct messaging_context *msg,
110 : void *private_data,
111 : uint32_t msg_type,
112 : struct server_id server_id,
113 : DATA_BLOB *data)
114 : {
115 0 : bool ok;
116 :
117 112 : DEBUG(10,("smbd_parent_conf_updated: Got message saying smb.conf was "
118 : "updated. Reloading.\n"));
119 112 : change_to_root_user();
120 112 : reload_services(NULL, NULL, false);
121 :
122 112 : ok = reinit_guest_session_info(NULL);
123 112 : if (!ok) {
124 0 : DBG_ERR("Failed to reinit guest info\n");
125 : }
126 112 : messaging_send_to_children(msg, MSG_SMB_CONF_UPDATED, NULL);
127 112 : }
128 :
129 : /****************************************************************************
130 : Send a SIGTERM to our process group.
131 : *****************************************************************************/
132 :
133 31589 : static void killkids(void)
134 : {
135 31589 : if(am_parent) kill(0,SIGTERM);
136 31589 : }
137 :
138 4 : static void msg_exit_server(struct messaging_context *msg,
139 : void *private_data,
140 : uint32_t msg_type,
141 : struct server_id server_id,
142 : DATA_BLOB *data)
143 : {
144 4 : DEBUG(3, ("got a SHUTDOWN message\n"));
145 4 : exit_server_cleanly(NULL);
146 : }
147 :
148 : #ifdef DEVELOPER
149 0 : static void msg_inject_fault(struct messaging_context *msg,
150 : void *private_data,
151 : uint32_t msg_type,
152 : struct server_id src,
153 : DATA_BLOB *data)
154 : {
155 0 : int sig;
156 0 : struct server_id_buf tmp;
157 :
158 0 : if (data->length != sizeof(sig)) {
159 0 : DEBUG(0, ("Process %s sent bogus signal injection request\n",
160 : server_id_str_buf(src, &tmp)));
161 0 : return;
162 : }
163 :
164 0 : sig = *(int *)data->data;
165 0 : if (sig == -1) {
166 0 : exit_server("internal error injected");
167 : return;
168 : }
169 :
170 : #ifdef HAVE_STRSIGNAL
171 0 : DEBUG(0, ("Process %s requested injection of signal %d (%s)\n",
172 : server_id_str_buf(src, &tmp), sig, strsignal(sig)));
173 : #else
174 : DEBUG(0, ("Process %s requested injection of signal %d\n",
175 : server_id_str_buf(src, &tmp), sig));
176 : #endif
177 :
178 0 : kill(getpid(), sig);
179 : }
180 : #endif /* DEVELOPER */
181 :
182 : #if defined(DEVELOPER) || defined(ENABLE_SELFTEST)
183 : /*
184 : * Sleep for the specified number of seconds.
185 : */
186 0 : static void msg_sleep(struct messaging_context *msg,
187 : void *private_data,
188 : uint32_t msg_type,
189 : struct server_id src,
190 : DATA_BLOB *data)
191 : {
192 0 : unsigned int seconds;
193 0 : struct server_id_buf tmp;
194 :
195 0 : if (data->length != sizeof(seconds)) {
196 0 : DBG_ERR("Process %s sent bogus sleep request\n",
197 : server_id_str_buf(src, &tmp));
198 0 : return;
199 : }
200 :
201 0 : seconds = *(unsigned int *)data->data;
202 0 : DBG_ERR("Process %s request a sleep of %u seconds\n",
203 : server_id_str_buf(src, &tmp),
204 : seconds);
205 0 : sleep(seconds);
206 0 : DBG_ERR("Restarting after %u second sleep requested by process %s\n",
207 : seconds,
208 : server_id_str_buf(src, &tmp));
209 : }
210 : #endif /* DEVELOPER */
211 :
212 184 : static NTSTATUS messaging_send_to_children(struct messaging_context *msg_ctx,
213 : uint32_t msg_type, DATA_BLOB* data)
214 : {
215 0 : NTSTATUS status;
216 184 : struct smbd_parent_context *parent = am_parent;
217 0 : struct smbd_child_pid *child;
218 :
219 184 : if (parent == NULL) {
220 184 : return NT_STATUS_INTERNAL_ERROR;
221 : }
222 :
223 0 : for (child = parent->children; child != NULL; child = child->next) {
224 0 : status = messaging_send(parent->msg_ctx,
225 : pid_to_procid(child->pid),
226 : msg_type, data);
227 0 : if (!NT_STATUS_IS_OK(status)) {
228 0 : DBG_DEBUG("messaging_send(%d) failed: %s\n",
229 : (int)child->pid, nt_errstr(status));
230 : }
231 : }
232 0 : return NT_STATUS_OK;
233 : }
234 :
235 10 : static void smb_parent_send_to_children(struct messaging_context *ctx,
236 : void* data,
237 : uint32_t msg_type,
238 : struct server_id srv_id,
239 : DATA_BLOB* msg_data)
240 : {
241 10 : messaging_send_to_children(ctx, msg_type, msg_data);
242 10 : }
243 :
244 : /*
245 : * Parent smbd process sets its own debug level first and then
246 : * sends a message to all the smbd children to adjust their debug
247 : * level to that of the parent.
248 : */
249 :
250 0 : static void smbd_msg_debug(struct messaging_context *msg_ctx,
251 : void *private_data,
252 : uint32_t msg_type,
253 : struct server_id server_id,
254 : DATA_BLOB *data)
255 : {
256 0 : debug_message(msg_ctx, private_data, MSG_DEBUG, server_id, data);
257 :
258 0 : messaging_send_to_children(msg_ctx, MSG_DEBUG, data);
259 0 : }
260 :
261 0 : static void smbd_parent_id_cache_kill(struct messaging_context *msg_ctx,
262 : void *private_data,
263 : uint32_t msg_type,
264 : struct server_id server_id,
265 : DATA_BLOB* data)
266 : {
267 0 : const char *msg = (data && data->data)
268 0 : ? (const char *)data->data : "<NULL>";
269 0 : struct id_cache_ref id;
270 :
271 0 : if (!id_cache_ref_parse(msg, &id)) {
272 0 : DEBUG(0, ("Invalid ?ID: %s\n", msg));
273 0 : return;
274 : }
275 :
276 0 : id_cache_delete_from_cache(&id);
277 :
278 0 : messaging_send_to_children(msg_ctx, msg_type, data);
279 : }
280 :
281 62 : static void smbd_parent_id_cache_delete(struct messaging_context *ctx,
282 : void* data,
283 : uint32_t msg_type,
284 : struct server_id srv_id,
285 : DATA_BLOB* msg_data)
286 : {
287 62 : id_cache_delete_message(ctx, data, msg_type, srv_id, msg_data);
288 :
289 62 : messaging_send_to_children(ctx, msg_type, msg_data);
290 62 : }
291 :
292 0 : static void add_child_pid(struct smbd_parent_context *parent,
293 : pid_t pid)
294 : {
295 0 : struct smbd_child_pid *child;
296 :
297 0 : child = talloc_zero(parent, struct smbd_child_pid);
298 0 : if (child == NULL) {
299 0 : DEBUG(0, ("Could not add child struct -- malloc failed\n"));
300 0 : return;
301 : }
302 0 : child->pid = pid;
303 0 : DLIST_ADD(parent->children, child);
304 0 : parent->num_children += 1;
305 : }
306 :
307 0 : static void smb_tell_num_children(struct messaging_context *ctx, void *data,
308 : uint32_t msg_type, struct server_id srv_id,
309 : DATA_BLOB *msg_data)
310 : {
311 0 : uint8_t buf[sizeof(uint32_t)];
312 :
313 0 : if (am_parent) {
314 0 : SIVAL(buf, 0, am_parent->num_children);
315 0 : messaging_send_buf(ctx, srv_id, MSG_SMB_NUM_CHILDREN,
316 : buf, sizeof(buf));
317 : }
318 0 : }
319 :
320 : static void notifyd_stopped(struct tevent_req *req);
321 :
322 0 : static struct tevent_req *notifyd_req(struct messaging_context *msg_ctx,
323 : struct tevent_context *ev)
324 : {
325 0 : struct tevent_req *req;
326 0 : sys_notify_watch_fn sys_notify_watch = NULL;
327 0 : struct sys_notify_context *sys_notify_ctx = NULL;
328 0 : struct ctdbd_connection *ctdbd_conn = NULL;
329 :
330 0 : if (lp_kernel_change_notify()) {
331 :
332 : #ifdef HAVE_INOTIFY
333 0 : if (lp_parm_bool(-1, "notify", "inotify", true)) {
334 0 : sys_notify_watch = inotify_watch;
335 : }
336 : #endif
337 :
338 : #ifdef HAVE_FAM
339 : if (lp_parm_bool(-1, "notify", "fam",
340 : (sys_notify_watch == NULL))) {
341 : sys_notify_watch = fam_watch;
342 : }
343 : #endif
344 : }
345 :
346 0 : if (sys_notify_watch != NULL) {
347 0 : sys_notify_ctx = sys_notify_context_create(msg_ctx, ev);
348 0 : if (sys_notify_ctx == NULL) {
349 0 : return NULL;
350 : }
351 : }
352 :
353 0 : if (lp_clustering()) {
354 0 : ctdbd_conn = messaging_ctdb_connection();
355 : }
356 :
357 0 : req = notifyd_send(msg_ctx, ev, msg_ctx, ctdbd_conn,
358 : sys_notify_watch, sys_notify_ctx);
359 0 : if (req == NULL) {
360 0 : TALLOC_FREE(sys_notify_ctx);
361 0 : return NULL;
362 : }
363 0 : tevent_req_set_callback(req, notifyd_stopped, msg_ctx);
364 :
365 0 : return req;
366 : }
367 :
368 0 : static void notifyd_stopped(struct tevent_req *req)
369 : {
370 0 : int ret;
371 :
372 0 : ret = notifyd_recv(req);
373 0 : TALLOC_FREE(req);
374 0 : DEBUG(1, ("notifyd stopped: %s\n", strerror(ret)));
375 0 : }
376 :
377 0 : static void notifyd_sig_hup_handler(struct tevent_context *ev,
378 : struct tevent_signal *se,
379 : int signum,
380 : int count,
381 : void *siginfo,
382 : void *pvt)
383 : {
384 0 : DBG_NOTICE("notifyd: Reloading services after SIGHUP\n");
385 0 : reload_services(NULL, NULL, false);
386 0 : reopen_logs();
387 0 : }
388 :
389 0 : static bool smbd_notifyd_init(struct messaging_context *msg, bool interactive,
390 : struct server_id *ppid)
391 : {
392 0 : struct tevent_context *ev = messaging_tevent_context(msg);
393 0 : struct tevent_req *req;
394 0 : struct tevent_signal *se = NULL;
395 0 : pid_t pid;
396 0 : NTSTATUS status;
397 0 : bool ok;
398 :
399 0 : if (interactive) {
400 0 : req = notifyd_req(msg, ev);
401 0 : return (req != NULL);
402 : }
403 :
404 0 : pid = fork();
405 0 : if (pid == -1) {
406 0 : DEBUG(1, ("%s: fork failed: %s\n", __func__,
407 : strerror(errno)));
408 0 : return false;
409 : }
410 :
411 0 : if (pid != 0) {
412 0 : if (am_parent != NULL) {
413 0 : add_child_pid(am_parent, pid);
414 : }
415 0 : *ppid = pid_to_procid(pid);
416 0 : return true;
417 : }
418 :
419 0 : status = smbd_reinit_after_fork(msg, ev, true);
420 0 : if (!NT_STATUS_IS_OK(status)) {
421 0 : DEBUG(1, ("%s: reinit_after_fork failed: %s\n",
422 : __func__, nt_errstr(status)));
423 0 : exit(1);
424 : }
425 :
426 0 : process_set_title("smbd-notifyd", "notifyd");
427 :
428 0 : reopen_logs();
429 :
430 : /* Set up sighup handler for notifyd */
431 0 : se = tevent_add_signal(ev,
432 : ev,
433 : SIGHUP, 0,
434 : notifyd_sig_hup_handler,
435 : NULL);
436 0 : if (!se) {
437 0 : DEBUG(0, ("failed to setup notifyd SIGHUP handler\n"));
438 0 : exit(1);
439 : }
440 :
441 0 : req = notifyd_req(msg, ev);
442 0 : if (req == NULL) {
443 0 : exit(1);
444 : }
445 0 : tevent_req_set_callback(req, notifyd_stopped, msg);
446 :
447 : /* Block those signals that we are not handling */
448 0 : BlockSignals(True, SIGUSR1);
449 :
450 0 : messaging_send(msg, pid_to_procid(getppid()), MSG_SMB_NOTIFY_STARTED,
451 : NULL);
452 :
453 0 : ok = tevent_req_poll(req, ev);
454 0 : if (!ok) {
455 0 : DBG_WARNING("tevent_req_poll returned %s\n", strerror(errno));
456 0 : exit(1);
457 : }
458 0 : exit(0);
459 : }
460 :
461 : static void notifyd_init_trigger(struct tevent_req *req);
462 :
463 : struct notifyd_init_state {
464 : bool ok;
465 : struct tevent_context *ev;
466 : struct messaging_context *msg;
467 : struct server_id *ppid;
468 : };
469 :
470 0 : static struct tevent_req *notifyd_init_send(struct tevent_context *ev,
471 : TALLOC_CTX *mem_ctx,
472 : struct messaging_context *msg,
473 : struct server_id *ppid)
474 : {
475 0 : struct tevent_req *req = NULL;
476 0 : struct tevent_req *subreq = NULL;
477 0 : struct notifyd_init_state *state = NULL;
478 :
479 0 : req = tevent_req_create(mem_ctx, &state, struct notifyd_init_state);
480 0 : if (req == NULL) {
481 0 : return NULL;
482 : }
483 :
484 0 : *state = (struct notifyd_init_state) {
485 : .msg = msg,
486 : .ev = ev,
487 : .ppid = ppid
488 : };
489 :
490 0 : subreq = tevent_wakeup_send(state, ev, tevent_timeval_current_ofs(1, 0));
491 0 : if (tevent_req_nomem(subreq, req)) {
492 0 : return tevent_req_post(req, ev);
493 : }
494 :
495 0 : tevent_req_set_callback(subreq, notifyd_init_trigger, req);
496 0 : return req;
497 : }
498 :
499 0 : static void notifyd_init_trigger(struct tevent_req *subreq)
500 : {
501 0 : struct tevent_req *req = tevent_req_callback_data(
502 : subreq, struct tevent_req);
503 0 : struct notifyd_init_state *state = tevent_req_data(
504 : req, struct notifyd_init_state);
505 0 : bool ok;
506 :
507 0 : DBG_NOTICE("Triggering notifyd startup\n");
508 :
509 0 : ok = tevent_wakeup_recv(subreq);
510 0 : TALLOC_FREE(subreq);
511 0 : if (!ok) {
512 0 : tevent_req_error(req, ENOMEM);
513 0 : return;
514 : }
515 :
516 0 : state->ok = smbd_notifyd_init(state->msg, false, state->ppid);
517 0 : if (state->ok) {
518 0 : DBG_WARNING("notifyd restarted\n");
519 0 : tevent_req_done(req);
520 0 : return;
521 : }
522 :
523 0 : DBG_NOTICE("notifyd startup failed, rescheduling\n");
524 :
525 0 : subreq = tevent_wakeup_send(state, state->ev,
526 : tevent_timeval_current_ofs(1, 0));
527 0 : if (tevent_req_nomem(subreq, req)) {
528 0 : DBG_ERR("scheduling notifyd restart failed, giving up\n");
529 0 : return;
530 : }
531 :
532 0 : tevent_req_set_callback(subreq, notifyd_init_trigger, req);
533 0 : return;
534 : }
535 :
536 0 : static bool notifyd_init_recv(struct tevent_req *req)
537 : {
538 0 : struct notifyd_init_state *state = tevent_req_data(
539 : req, struct notifyd_init_state);
540 :
541 0 : return state->ok;
542 : }
543 :
544 0 : static void notifyd_started(struct tevent_req *req)
545 : {
546 0 : bool ok;
547 :
548 0 : ok = notifyd_init_recv(req);
549 0 : TALLOC_FREE(req);
550 0 : if (!ok) {
551 0 : DBG_ERR("Failed to restart notifyd, giving up\n");
552 0 : return;
553 : }
554 : }
555 :
556 0 : static void cleanupd_sig_hup_handler(struct tevent_context *ev,
557 : struct tevent_signal *se,
558 : int signum,
559 : int count,
560 : void *siginfo,
561 : void *pvt)
562 : {
563 0 : DBG_NOTICE("cleanupd: Reloading services after SIGHUP\n");
564 0 : reopen_logs();
565 0 : }
566 :
567 : static void cleanupd_stopped(struct tevent_req *req);
568 :
569 0 : static bool cleanupd_init(struct messaging_context *msg, bool interactive,
570 : struct server_id *ppid)
571 : {
572 0 : struct tevent_context *ev = messaging_tevent_context(msg);
573 0 : struct server_id parent_id = messaging_server_id(msg);
574 0 : struct tevent_signal *se = NULL;
575 0 : struct tevent_req *req;
576 0 : pid_t pid;
577 0 : NTSTATUS status;
578 0 : ssize_t rwret;
579 0 : int ret;
580 0 : bool ok;
581 0 : char c;
582 0 : int up_pipe[2];
583 :
584 0 : if (interactive) {
585 0 : req = smbd_cleanupd_send(msg, ev, msg, parent_id.pid);
586 0 : *ppid = messaging_server_id(msg);
587 0 : return (req != NULL);
588 : }
589 :
590 0 : ret = pipe(up_pipe);
591 0 : if (ret == -1) {
592 0 : DBG_WARNING("pipe failed: %s\n", strerror(errno));
593 0 : return false;
594 : }
595 :
596 0 : pid = fork();
597 0 : if (pid == -1) {
598 0 : DBG_WARNING("fork failed: %s\n", strerror(errno));
599 0 : close(up_pipe[0]);
600 0 : close(up_pipe[1]);
601 0 : return false;
602 : }
603 :
604 0 : if (pid != 0) {
605 :
606 0 : close(up_pipe[1]);
607 0 : rwret = sys_read(up_pipe[0], &c, 1);
608 0 : close(up_pipe[0]);
609 :
610 0 : if (rwret == -1) {
611 0 : DBG_WARNING("sys_read failed: %s\n", strerror(errno));
612 0 : return false;
613 : }
614 0 : if (rwret == 0) {
615 0 : DBG_WARNING("cleanupd could not start\n");
616 0 : return false;
617 : }
618 0 : if (c != 0) {
619 0 : DBG_WARNING("cleanupd returned %d\n", (int)c);
620 0 : return false;
621 : }
622 :
623 0 : DBG_DEBUG("Started cleanupd pid=%d\n", (int)pid);
624 :
625 0 : if (am_parent != NULL) {
626 0 : add_child_pid(am_parent, pid);
627 : }
628 :
629 0 : *ppid = pid_to_procid(pid);
630 0 : return true;
631 : }
632 :
633 0 : close(up_pipe[0]);
634 :
635 0 : status = smbd_reinit_after_fork(msg, ev, true);
636 0 : if (!NT_STATUS_IS_OK(status)) {
637 0 : DBG_WARNING("reinit_after_fork failed: %s\n",
638 : nt_errstr(status));
639 0 : c = 1;
640 0 : sys_write(up_pipe[1], &c, 1);
641 :
642 0 : exit(1);
643 : }
644 :
645 0 : process_set_title("smbd-cleanupd", "cleanupd");
646 :
647 0 : se = tevent_add_signal(ev,
648 : ev,
649 : SIGHUP,
650 : 0,
651 : cleanupd_sig_hup_handler,
652 : NULL);
653 0 : if (se == NULL) {
654 0 : DBG_ERR("Could not add SIGHUP handler\n");
655 0 : exit(1);
656 : }
657 :
658 0 : req = smbd_cleanupd_send(msg, ev, msg, parent_id.pid);
659 0 : if (req == NULL) {
660 0 : DBG_WARNING("smbd_cleanupd_send failed\n");
661 0 : c = 2;
662 0 : sys_write(up_pipe[1], &c, 1);
663 :
664 0 : exit(1);
665 : }
666 :
667 0 : tevent_req_set_callback(req, cleanupd_stopped, msg);
668 :
669 0 : c = 0;
670 0 : rwret = sys_write(up_pipe[1], &c, 1);
671 0 : close(up_pipe[1]);
672 :
673 0 : if (rwret == -1) {
674 0 : DBG_WARNING("sys_write failed: %s\n", strerror(errno));
675 0 : exit(1);
676 : }
677 0 : if (rwret != 1) {
678 0 : DBG_WARNING("sys_write could not write result\n");
679 0 : exit(1);
680 : }
681 :
682 0 : ok = tevent_req_poll(req, ev);
683 0 : if (!ok) {
684 0 : DBG_WARNING("tevent_req_poll returned %s\n", strerror(errno));
685 : }
686 0 : exit(0);
687 : }
688 :
689 0 : static void cleanupd_stopped(struct tevent_req *req)
690 : {
691 0 : NTSTATUS status;
692 :
693 0 : status = smbd_cleanupd_recv(req);
694 0 : DBG_WARNING("cleanupd stopped: %s\n", nt_errstr(status));
695 0 : }
696 :
697 : static void cleanupd_init_trigger(struct tevent_req *req);
698 :
699 : struct cleanup_init_state {
700 : bool ok;
701 : struct tevent_context *ev;
702 : struct messaging_context *msg;
703 : struct server_id *ppid;
704 : };
705 :
706 0 : static struct tevent_req *cleanupd_init_send(struct tevent_context *ev,
707 : TALLOC_CTX *mem_ctx,
708 : struct messaging_context *msg,
709 : struct server_id *ppid)
710 : {
711 0 : struct tevent_req *req = NULL;
712 0 : struct tevent_req *subreq = NULL;
713 0 : struct cleanup_init_state *state = NULL;
714 :
715 0 : req = tevent_req_create(mem_ctx, &state, struct cleanup_init_state);
716 0 : if (req == NULL) {
717 0 : return NULL;
718 : }
719 :
720 0 : *state = (struct cleanup_init_state) {
721 : .msg = msg,
722 : .ev = ev,
723 : .ppid = ppid
724 : };
725 :
726 0 : subreq = tevent_wakeup_send(state, ev, tevent_timeval_current_ofs(0, 0));
727 0 : if (tevent_req_nomem(subreq, req)) {
728 0 : return tevent_req_post(req, ev);
729 : }
730 :
731 0 : tevent_req_set_callback(subreq, cleanupd_init_trigger, req);
732 0 : return req;
733 : }
734 :
735 0 : static void cleanupd_init_trigger(struct tevent_req *subreq)
736 : {
737 0 : struct tevent_req *req = tevent_req_callback_data(
738 : subreq, struct tevent_req);
739 0 : struct cleanup_init_state *state = tevent_req_data(
740 : req, struct cleanup_init_state);
741 0 : bool ok;
742 :
743 0 : DBG_NOTICE("Triggering cleanupd startup\n");
744 :
745 0 : ok = tevent_wakeup_recv(subreq);
746 0 : TALLOC_FREE(subreq);
747 0 : if (!ok) {
748 0 : tevent_req_error(req, ENOMEM);
749 0 : return;
750 : }
751 :
752 0 : state->ok = cleanupd_init(state->msg, false, state->ppid);
753 0 : if (state->ok) {
754 0 : DBG_WARNING("cleanupd restarted\n");
755 0 : tevent_req_done(req);
756 0 : return;
757 : }
758 :
759 0 : DBG_NOTICE("cleanupd startup failed, rescheduling\n");
760 :
761 0 : subreq = tevent_wakeup_send(state, state->ev,
762 : tevent_timeval_current_ofs(1, 0));
763 0 : if (tevent_req_nomem(subreq, req)) {
764 0 : DBG_ERR("scheduling cleanupd restart failed, giving up\n");
765 0 : return;
766 : }
767 :
768 0 : tevent_req_set_callback(subreq, cleanupd_init_trigger, req);
769 0 : return;
770 : }
771 :
772 0 : static bool cleanupd_init_recv(struct tevent_req *req)
773 : {
774 0 : struct cleanup_init_state *state = tevent_req_data(
775 : req, struct cleanup_init_state);
776 :
777 0 : return state->ok;
778 : }
779 :
780 0 : static void cleanupd_started(struct tevent_req *req)
781 : {
782 0 : bool ok;
783 0 : NTSTATUS status;
784 0 : struct smbd_parent_context *parent = tevent_req_callback_data(
785 : req, struct smbd_parent_context);
786 :
787 0 : ok = cleanupd_init_recv(req);
788 0 : TALLOC_FREE(req);
789 0 : if (!ok) {
790 0 : DBG_ERR("Failed to restart cleanupd, giving up\n");
791 0 : return;
792 : }
793 :
794 0 : status = messaging_send(parent->msg_ctx,
795 : parent->cleanupd,
796 : MSG_SMB_NOTIFY_CLEANUP,
797 : &data_blob_null);
798 0 : if (!NT_STATUS_IS_OK(status)) {
799 0 : DBG_ERR("messaging_send returned %s\n",
800 : nt_errstr(status));
801 : }
802 : }
803 :
804 0 : static void remove_child_pid(struct smbd_parent_context *parent,
805 : pid_t pid,
806 : bool unclean_shutdown)
807 : {
808 0 : struct smbd_child_pid *child;
809 0 : NTSTATUS status;
810 0 : bool ok;
811 :
812 0 : for (child = parent->children; child != NULL; child = child->next) {
813 0 : if (child->pid == pid) {
814 0 : struct smbd_child_pid *tmp = child;
815 0 : DLIST_REMOVE(parent->children, child);
816 0 : TALLOC_FREE(tmp);
817 0 : parent->num_children -= 1;
818 0 : break;
819 : }
820 : }
821 :
822 0 : if (child == NULL) {
823 : /* not all forked child processes are added to the children list */
824 0 : DEBUG(2, ("Could not find child %d -- ignoring\n", (int)pid));
825 0 : return;
826 : }
827 :
828 0 : if (pid == procid_to_pid(&parent->cleanupd)) {
829 0 : struct tevent_req *req;
830 :
831 0 : server_id_set_disconnected(&parent->cleanupd);
832 :
833 0 : DBG_WARNING("Restarting cleanupd\n");
834 0 : req = cleanupd_init_send(messaging_tevent_context(parent->msg_ctx),
835 : parent,
836 : parent->msg_ctx,
837 : &parent->cleanupd);
838 0 : if (req == NULL) {
839 0 : DBG_ERR("Failed to restart cleanupd\n");
840 0 : return;
841 : }
842 0 : tevent_req_set_callback(req, cleanupd_started, parent);
843 0 : return;
844 : }
845 :
846 0 : if (pid == procid_to_pid(&parent->notifyd)) {
847 0 : struct tevent_req *req;
848 0 : struct tevent_context *ev = messaging_tevent_context(
849 : parent->msg_ctx);
850 :
851 0 : server_id_set_disconnected(&parent->notifyd);
852 :
853 0 : DBG_WARNING("Restarting notifyd\n");
854 0 : req = notifyd_init_send(ev,
855 : parent,
856 : parent->msg_ctx,
857 : &parent->notifyd);
858 0 : if (req == NULL) {
859 0 : DBG_ERR("Failed to restart notifyd\n");
860 0 : return;
861 : }
862 0 : tevent_req_set_callback(req, notifyd_started, parent);
863 0 : return;
864 : }
865 :
866 0 : ok = cleanupdb_store_child(pid, unclean_shutdown);
867 0 : if (!ok) {
868 0 : DBG_ERR("cleanupdb_store_child failed\n");
869 0 : return;
870 : }
871 :
872 0 : if (!server_id_is_disconnected(&parent->cleanupd)) {
873 0 : status = messaging_send(parent->msg_ctx,
874 : parent->cleanupd,
875 : MSG_SMB_NOTIFY_CLEANUP,
876 : &data_blob_null);
877 0 : if (!NT_STATUS_IS_OK(status)) {
878 0 : DBG_ERR("messaging_send returned %s\n",
879 : nt_errstr(status));
880 : }
881 : }
882 : }
883 :
884 : /****************************************************************************
885 : Have we reached the process limit ?
886 : ****************************************************************************/
887 :
888 0 : static bool allowable_number_of_smbd_processes(struct smbd_parent_context *parent)
889 : {
890 0 : int max_processes = lp_max_smbd_processes();
891 :
892 0 : if (!max_processes)
893 0 : return True;
894 :
895 0 : return parent->num_children < max_processes;
896 : }
897 :
898 0 : static void smbd_sig_chld_handler(struct tevent_context *ev,
899 : struct tevent_signal *se,
900 : int signum,
901 : int count,
902 : void *siginfo,
903 : void *private_data)
904 : {
905 0 : pid_t pid;
906 0 : int status;
907 0 : struct smbd_parent_context *parent =
908 0 : talloc_get_type_abort(private_data,
909 : struct smbd_parent_context);
910 :
911 0 : while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
912 0 : bool unclean_shutdown = False;
913 :
914 : /* If the child terminated normally, assume
915 : it was an unclean shutdown unless the
916 : status is 0
917 : */
918 0 : if (WIFEXITED(status)) {
919 0 : unclean_shutdown = WEXITSTATUS(status);
920 : }
921 : /* If the child terminated due to a signal
922 : we always assume it was unclean.
923 : */
924 0 : if (WIFSIGNALED(status)) {
925 0 : unclean_shutdown = True;
926 : }
927 0 : remove_child_pid(parent, pid, unclean_shutdown);
928 : }
929 0 : }
930 :
931 0 : static void smbd_setup_sig_chld_handler(struct smbd_parent_context *parent)
932 : {
933 0 : struct tevent_signal *se;
934 :
935 0 : se = tevent_add_signal(parent->ev_ctx,
936 : parent, /* mem_ctx */
937 : SIGCHLD, 0,
938 : smbd_sig_chld_handler,
939 : parent);
940 0 : if (!se) {
941 0 : exit_server("failed to setup SIGCHLD handler");
942 : }
943 0 : }
944 :
945 126292 : static void smbd_open_socket_close_fn(struct tevent_context *ev,
946 : struct tevent_fd *fde,
947 : int fd,
948 : void *private_data)
949 : {
950 : /* this might be the socket_wrapper swrap_close() */
951 126292 : close(fd);
952 126292 : }
953 :
954 0 : static void smbd_accept_connection(struct tevent_context *ev,
955 : struct tevent_fd *fde,
956 : uint16_t flags,
957 : void *private_data)
958 : {
959 0 : struct smbd_open_socket *s = talloc_get_type_abort(private_data,
960 : struct smbd_open_socket);
961 0 : struct messaging_context *msg_ctx = s->parent->msg_ctx;
962 0 : struct sockaddr_storage addr;
963 0 : socklen_t in_addrlen = sizeof(addr);
964 0 : int fd;
965 0 : pid_t pid = 0;
966 :
967 0 : fd = accept(s->fd, (struct sockaddr *)(void *)&addr,&in_addrlen);
968 0 : if (fd == -1 && errno == EINTR)
969 0 : return;
970 :
971 0 : if (fd == -1) {
972 0 : DEBUG(0,("accept: %s\n",
973 : strerror(errno)));
974 0 : return;
975 : }
976 0 : smb_set_close_on_exec(fd);
977 :
978 0 : if (s->parent->interactive) {
979 0 : reinit_after_fork(msg_ctx, ev, true);
980 0 : smbd_process(ev, msg_ctx, fd, true);
981 0 : exit_server_cleanly("end of interactive mode");
982 : return;
983 : }
984 :
985 0 : if (!allowable_number_of_smbd_processes(s->parent)) {
986 0 : close(fd);
987 0 : return;
988 : }
989 :
990 0 : pid = fork();
991 31567 : if (pid == 0) {
992 842 : char addrstr[INET6_ADDRSTRLEN];
993 31567 : NTSTATUS status = NT_STATUS_OK;
994 :
995 : /*
996 : * Can't use TALLOC_FREE here. Nulling out the argument to it
997 : * would overwrite memory we've just freed.
998 : */
999 31567 : talloc_free(s->parent);
1000 31567 : s = NULL;
1001 :
1002 : /* Stop zombies, the parent explicitly handles
1003 : * them, counting worker smbds. */
1004 31567 : CatchChild();
1005 :
1006 31567 : status = smbd_reinit_after_fork(msg_ctx, ev, true);
1007 31567 : if (!NT_STATUS_IS_OK(status)) {
1008 0 : if (NT_STATUS_EQUAL(status,
1009 : NT_STATUS_TOO_MANY_OPENED_FILES)) {
1010 0 : DEBUG(0,("child process cannot initialize "
1011 : "because too many files are open\n"));
1012 0 : goto exit;
1013 : }
1014 0 : if (lp_clustering() &&
1015 0 : (NT_STATUS_EQUAL(
1016 0 : status, NT_STATUS_INTERNAL_DB_ERROR) ||
1017 0 : NT_STATUS_EQUAL(
1018 : status, NT_STATUS_CONNECTION_REFUSED))) {
1019 0 : DEBUG(1, ("child process cannot initialize "
1020 : "because connection to CTDB "
1021 : "has failed: %s\n",
1022 : nt_errstr(status)));
1023 0 : goto exit;
1024 : }
1025 :
1026 0 : DEBUG(0,("reinit_after_fork() failed\n"));
1027 0 : smb_panic("reinit_after_fork() failed");
1028 : }
1029 :
1030 31567 : print_sockaddr(addrstr, sizeof(addrstr), &addr);
1031 31567 : process_set_title("smbd[%s]", "client [%s]", addrstr);
1032 :
1033 31567 : smbd_process(ev, msg_ctx, fd, false);
1034 0 : exit:
1035 0 : exit_server_cleanly("end of child");
1036 : return;
1037 : }
1038 :
1039 0 : if (pid < 0) {
1040 0 : DEBUG(0,("smbd_accept_connection: fork() failed: %s\n",
1041 : strerror(errno)));
1042 : }
1043 :
1044 : /* The parent doesn't need this socket */
1045 0 : close(fd);
1046 :
1047 : /* Sun May 6 18:56:14 2001 ackley@cs.unm.edu:
1048 : Clear the closed fd info out of server_fd --
1049 : and more importantly, out of client_fd in
1050 : util_sock.c, to avoid a possible
1051 : getpeername failure if we reopen the logs
1052 : and use %I in the filename.
1053 : */
1054 :
1055 0 : if (pid != 0) {
1056 0 : add_child_pid(s->parent, pid);
1057 : }
1058 :
1059 : /* Force parent to check log size after
1060 : * spawning child. Fix from
1061 : * klausr@ITAP.Physik.Uni-Stuttgart.De. The
1062 : * parent smbd will log to logserver.smb. It
1063 : * writes only two messages for each child
1064 : * started/finished. But each child writes,
1065 : * say, 50 messages also in logserver.smb,
1066 : * beginning with the debug_count of the
1067 : * parent, before the child opens its own log
1068 : * file logserver.client. In a worst case
1069 : * scenario the size of logserver.smb would be
1070 : * checked after about 50*50=2500 messages
1071 : * (ca. 100kb).
1072 : * */
1073 0 : force_check_log_size();
1074 : }
1075 :
1076 0 : static bool smbd_open_one_socket(struct smbd_parent_context *parent,
1077 : struct tevent_context *ev_ctx,
1078 : const struct sockaddr_storage *ifss,
1079 : uint16_t port)
1080 : {
1081 0 : struct smbd_open_socket *s;
1082 :
1083 0 : s = talloc(parent, struct smbd_open_socket);
1084 0 : if (!s) {
1085 0 : return false;
1086 : }
1087 :
1088 0 : s->parent = parent;
1089 :
1090 0 : s->fd = open_socket_in(SOCK_STREAM, ifss, port, true);
1091 0 : if (s->fd < 0) {
1092 0 : int err = -(s->fd);
1093 0 : DBG_ERR("open_socket_in failed: %s\n", strerror(err));
1094 0 : TALLOC_FREE(s);
1095 : /*
1096 : * We ignore an error here, as we've done before
1097 : */
1098 0 : return true;
1099 : }
1100 :
1101 : /* ready to listen */
1102 0 : set_socket_options(s->fd, "SO_KEEPALIVE");
1103 0 : set_socket_options(s->fd, lp_socket_options());
1104 :
1105 : /* Set server socket to
1106 : * non-blocking for the accept. */
1107 0 : set_blocking(s->fd, False);
1108 :
1109 0 : if (listen(s->fd, SMBD_LISTEN_BACKLOG) == -1) {
1110 0 : DEBUG(0,("smbd_open_one_socket: listen: "
1111 : "%s\n", strerror(errno)));
1112 0 : close(s->fd);
1113 0 : TALLOC_FREE(s);
1114 0 : return false;
1115 : }
1116 :
1117 0 : s->fde = tevent_add_fd(ev_ctx,
1118 : s,
1119 : s->fd, TEVENT_FD_READ,
1120 : smbd_accept_connection,
1121 : s);
1122 0 : if (!s->fde) {
1123 0 : DEBUG(0,("smbd_open_one_socket: "
1124 : "tevent_add_fd: %s\n",
1125 : strerror(errno)));
1126 0 : close(s->fd);
1127 0 : TALLOC_FREE(s);
1128 0 : return false;
1129 : }
1130 0 : tevent_fd_set_close_fn(s->fde, smbd_open_socket_close_fn);
1131 :
1132 0 : DLIST_ADD_END(parent->sockets, s);
1133 :
1134 0 : return true;
1135 : }
1136 :
1137 : /****************************************************************************
1138 : Open the socket communication.
1139 : ****************************************************************************/
1140 :
1141 0 : static bool open_sockets_smbd(struct smbd_parent_context *parent,
1142 : struct tevent_context *ev_ctx,
1143 : struct messaging_context *msg_ctx,
1144 : const char *smb_ports)
1145 : {
1146 0 : int num_interfaces = iface_count();
1147 0 : int i,j;
1148 0 : const char **ports;
1149 0 : unsigned dns_port = 0;
1150 :
1151 : #ifdef HAVE_ATEXIT
1152 0 : atexit(killkids);
1153 : #endif
1154 :
1155 : /* Stop zombies */
1156 0 : smbd_setup_sig_chld_handler(parent);
1157 :
1158 0 : ports = lp_smb_ports();
1159 :
1160 : /* use a reasonable default set of ports - listing on 445 and 139 */
1161 0 : if (smb_ports) {
1162 0 : char **l;
1163 0 : l = str_list_make_v3(talloc_tos(), smb_ports, NULL);
1164 0 : ports = discard_const_p(const char *, l);
1165 : }
1166 :
1167 0 : for (j = 0; ports && ports[j]; j++) {
1168 0 : unsigned port = atoi(ports[j]);
1169 :
1170 0 : if (port == 0 || port > 0xffff) {
1171 0 : exit_server_cleanly("Invalid port in the config or on "
1172 : "the commandline specified!");
1173 : }
1174 : }
1175 :
1176 0 : if (lp_interfaces() && lp_bind_interfaces_only()) {
1177 : /* We have been given an interfaces line, and been
1178 : told to only bind to those interfaces. Create a
1179 : socket per interface and bind to only these.
1180 : */
1181 :
1182 : /* Now open a listen socket for each of the
1183 : interfaces. */
1184 0 : for(i = 0; i < num_interfaces; i++) {
1185 0 : const struct sockaddr_storage *ifss =
1186 0 : iface_n_sockaddr_storage(i);
1187 0 : if (ifss == NULL) {
1188 0 : DEBUG(0,("open_sockets_smbd: "
1189 : "interface %d has NULL IP address !\n",
1190 : i));
1191 0 : continue;
1192 : }
1193 :
1194 0 : for (j = 0; ports && ports[j]; j++) {
1195 0 : unsigned port = atoi(ports[j]);
1196 :
1197 : /* Keep the first port for mDNS service
1198 : * registration.
1199 : */
1200 0 : if (dns_port == 0) {
1201 0 : dns_port = port;
1202 : }
1203 :
1204 0 : if (!smbd_open_one_socket(parent,
1205 : ev_ctx,
1206 : ifss,
1207 : port)) {
1208 0 : return false;
1209 : }
1210 : }
1211 : }
1212 : } else {
1213 : /* Just bind to 0.0.0.0 - accept connections
1214 : from anywhere. */
1215 :
1216 0 : const char *sock_addr;
1217 0 : char *sock_tok;
1218 0 : const char *sock_ptr;
1219 :
1220 : #ifdef HAVE_IPV6
1221 0 : sock_addr = "::,0.0.0.0";
1222 : #else
1223 : sock_addr = "0.0.0.0";
1224 : #endif
1225 :
1226 0 : for (sock_ptr=sock_addr;
1227 0 : next_token_talloc(talloc_tos(), &sock_ptr, &sock_tok, " \t,"); ) {
1228 0 : for (j = 0; ports && ports[j]; j++) {
1229 0 : struct sockaddr_storage ss;
1230 0 : unsigned port = atoi(ports[j]);
1231 :
1232 : /* Keep the first port for mDNS service
1233 : * registration.
1234 : */
1235 0 : if (dns_port == 0) {
1236 0 : dns_port = port;
1237 : }
1238 :
1239 : /* open an incoming socket */
1240 0 : if (!interpret_string_addr(&ss, sock_tok,
1241 : AI_NUMERICHOST|AI_PASSIVE)) {
1242 0 : continue;
1243 : }
1244 :
1245 : /*
1246 : * If we fail to open any sockets
1247 : * in this loop the parent-sockets == NULL
1248 : * case below will prevent us from starting.
1249 : */
1250 :
1251 0 : (void)smbd_open_one_socket(parent,
1252 : ev_ctx,
1253 : &ss,
1254 : port);
1255 : }
1256 : }
1257 : }
1258 :
1259 0 : if (parent->sockets == NULL) {
1260 0 : DEBUG(0,("open_sockets_smbd: No "
1261 : "sockets available to bind to.\n"));
1262 0 : return false;
1263 : }
1264 :
1265 : /* Listen to messages */
1266 :
1267 0 : messaging_register(msg_ctx, NULL, MSG_SHUTDOWN, msg_exit_server);
1268 0 : messaging_register(msg_ctx, ev_ctx, MSG_SMB_CONF_UPDATED,
1269 : smbd_parent_conf_updated);
1270 0 : messaging_register(msg_ctx, NULL, MSG_DEBUG, smbd_msg_debug);
1271 0 : messaging_register(msg_ctx, NULL, MSG_SMB_FORCE_TDIS,
1272 : smb_parent_send_to_children);
1273 0 : messaging_register(msg_ctx, NULL, MSG_SMB_FORCE_TDIS_DENIED,
1274 : smb_parent_send_to_children);
1275 0 : messaging_register(msg_ctx, NULL, MSG_SMB_KILL_CLIENT_IP,
1276 : smb_parent_send_to_children);
1277 0 : messaging_register(msg_ctx, NULL, MSG_SMB_TELL_NUM_CHILDREN,
1278 : smb_tell_num_children);
1279 :
1280 0 : messaging_register(msg_ctx, NULL,
1281 : ID_CACHE_DELETE, smbd_parent_id_cache_delete);
1282 0 : messaging_register(msg_ctx, NULL,
1283 : ID_CACHE_KILL, smbd_parent_id_cache_kill);
1284 0 : messaging_register(msg_ctx, NULL, MSG_SMB_NOTIFY_STARTED,
1285 : smb_parent_send_to_children);
1286 :
1287 0 : if (lp_interfaces() && lp_bind_interfaces_only()) {
1288 0 : messaging_register(msg_ctx,
1289 : NULL,
1290 : MSG_SMB_IP_DROPPED,
1291 : smb_parent_send_to_children);
1292 : }
1293 :
1294 : #ifdef DEVELOPER
1295 0 : messaging_register(msg_ctx, NULL, MSG_SMB_INJECT_FAULT,
1296 : msg_inject_fault);
1297 : #endif
1298 :
1299 : #if defined(DEVELOPER) || defined(ENABLE_SELFTEST)
1300 0 : messaging_register(msg_ctx, NULL, MSG_SMB_SLEEP, msg_sleep);
1301 : #endif
1302 :
1303 0 : if (lp_multicast_dns_register() && (dns_port != 0)) {
1304 : #ifdef WITH_DNSSD_SUPPORT
1305 : smbd_setup_mdns_registration(ev_ctx,
1306 : parent, dns_port);
1307 : #endif
1308 : #ifdef WITH_AVAHI_SUPPORT
1309 : void *avahi_conn;
1310 :
1311 0 : avahi_conn = avahi_start_register(ev_ctx,
1312 : ev_ctx,
1313 : dns_port);
1314 0 : if (avahi_conn == NULL) {
1315 0 : DEBUG(10, ("avahi_start_register failed\n"));
1316 : }
1317 : #endif
1318 0 : }
1319 :
1320 0 : return true;
1321 : }
1322 :
1323 :
1324 : /*
1325 : handle stdin becoming readable when we are in --foreground mode
1326 : */
1327 0 : static void smbd_stdin_handler(struct tevent_context *ev,
1328 : struct tevent_fd *fde,
1329 : uint16_t flags,
1330 : void *private_data)
1331 : {
1332 0 : char c;
1333 0 : if (read(0, &c, 1) != 1) {
1334 : /* we have reached EOF on stdin, which means the
1335 : parent has exited. Shutdown the server */
1336 0 : exit_server_cleanly("EOF on stdin");
1337 : }
1338 0 : }
1339 :
1340 : struct smbd_parent_tevent_trace_state {
1341 : TALLOC_CTX *frame;
1342 : };
1343 :
1344 0 : static void smbd_parent_tevent_trace_callback(enum tevent_trace_point point,
1345 : void *private_data)
1346 : {
1347 0 : struct smbd_parent_tevent_trace_state *state =
1348 : (struct smbd_parent_tevent_trace_state *)private_data;
1349 :
1350 0 : switch (point) {
1351 0 : case TEVENT_TRACE_BEFORE_WAIT:
1352 0 : break;
1353 0 : case TEVENT_TRACE_AFTER_WAIT:
1354 0 : break;
1355 0 : case TEVENT_TRACE_BEFORE_LOOP_ONCE:
1356 0 : TALLOC_FREE(state->frame);
1357 0 : state->frame = talloc_stackframe();
1358 0 : break;
1359 0 : case TEVENT_TRACE_AFTER_LOOP_ONCE:
1360 0 : TALLOC_FREE(state->frame);
1361 0 : break;
1362 : }
1363 :
1364 0 : errno = 0;
1365 0 : }
1366 :
1367 0 : static void smbd_parent_loop(struct tevent_context *ev_ctx,
1368 : struct smbd_parent_context *parent)
1369 : {
1370 0 : struct smbd_parent_tevent_trace_state trace_state = {
1371 : .frame = NULL,
1372 : };
1373 0 : int ret = 0;
1374 :
1375 0 : tevent_set_trace_callback(ev_ctx, smbd_parent_tevent_trace_callback,
1376 : &trace_state);
1377 :
1378 : /* now accept incoming connections - forking a new process
1379 : for each incoming connection */
1380 0 : DEBUG(2,("waiting for connections\n"));
1381 :
1382 0 : ret = tevent_loop_wait(ev_ctx);
1383 0 : if (ret != 0) {
1384 0 : DEBUG(0, ("tevent_loop_wait failed: %d, %s, exiting\n",
1385 : ret, strerror(errno)));
1386 : }
1387 :
1388 0 : TALLOC_FREE(trace_state.frame);
1389 :
1390 : /* NOTREACHED return True; */
1391 0 : }
1392 :
1393 :
1394 : /****************************************************************************
1395 : Initialise connect, service and file structs.
1396 : ****************************************************************************/
1397 :
1398 0 : static bool init_structs(void )
1399 : {
1400 : /*
1401 : * Set the machine NETBIOS name if not already
1402 : * set from the config file.
1403 : */
1404 :
1405 0 : if (!secrets_init())
1406 0 : return False;
1407 :
1408 0 : return True;
1409 : }
1410 :
1411 0 : static void smbd_parent_sig_term_handler(struct tevent_context *ev,
1412 : struct tevent_signal *se,
1413 : int signum,
1414 : int count,
1415 : void *siginfo,
1416 : void *private_data)
1417 : {
1418 0 : exit_server_cleanly("termination signal");
1419 : }
1420 :
1421 0 : static void smbd_parent_sig_hup_handler(struct tevent_context *ev,
1422 : struct tevent_signal *se,
1423 : int signum,
1424 : int count,
1425 : void *siginfo,
1426 : void *private_data)
1427 : {
1428 0 : change_to_root_user();
1429 0 : DEBUG(1,("parent: Reloading services after SIGHUP\n"));
1430 0 : reload_services(NULL, NULL, false);
1431 0 : }
1432 :
1433 : struct smbd_claim_version_state {
1434 : TALLOC_CTX *mem_ctx;
1435 : char *version;
1436 : };
1437 :
1438 0 : static void smbd_claim_version_parser(struct server_id exclusive,
1439 : size_t num_shared,
1440 : const struct server_id *shared,
1441 : const uint8_t *data,
1442 : size_t datalen,
1443 : void *private_data)
1444 : {
1445 0 : struct smbd_claim_version_state *state = private_data;
1446 :
1447 0 : if (datalen == 0) {
1448 0 : state->version = NULL;
1449 0 : return;
1450 : }
1451 0 : if (data[datalen-1] != '\0') {
1452 0 : DBG_WARNING("Invalid samba version\n");
1453 0 : dump_data(DBGLVL_WARNING, data, datalen);
1454 0 : state->version = NULL;
1455 0 : return;
1456 : }
1457 0 : state->version = talloc_strdup(state->mem_ctx, (const char *)data);
1458 : }
1459 :
1460 0 : static NTSTATUS smbd_claim_version(struct messaging_context *msg,
1461 : const char *version)
1462 : {
1463 0 : const char *name = "samba_version_string";
1464 0 : const TDB_DATA key = string_term_tdb_data(name);
1465 0 : struct smbd_claim_version_state state;
1466 0 : struct g_lock_ctx *ctx;
1467 0 : NTSTATUS status;
1468 :
1469 0 : ctx = g_lock_ctx_init(msg, msg);
1470 0 : if (ctx == NULL) {
1471 0 : DBG_WARNING("g_lock_ctx_init failed\n");
1472 0 : return NT_STATUS_UNSUCCESSFUL;
1473 : }
1474 :
1475 0 : status = g_lock_lock(ctx,
1476 : key,
1477 : G_LOCK_READ,
1478 0 : (struct timeval) { .tv_sec = 60 },
1479 : NULL,
1480 : NULL);
1481 0 : if (!NT_STATUS_IS_OK(status)) {
1482 0 : DBG_WARNING("g_lock_lock(G_LOCK_READ) failed: %s\n",
1483 : nt_errstr(status));
1484 0 : TALLOC_FREE(ctx);
1485 0 : return status;
1486 : }
1487 :
1488 0 : state = (struct smbd_claim_version_state) { .mem_ctx = ctx };
1489 :
1490 0 : status = g_lock_dump(ctx, key, smbd_claim_version_parser, &state);
1491 0 : if (!NT_STATUS_IS_OK(status) &&
1492 0 : !NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
1493 0 : DBG_ERR("Could not read samba_version_string\n");
1494 0 : g_lock_unlock(ctx, key);
1495 0 : TALLOC_FREE(ctx);
1496 0 : return status;
1497 : }
1498 :
1499 0 : if ((state.version != NULL) && (strcmp(version, state.version) == 0)) {
1500 : /*
1501 : * Leave the read lock for us around. Someone else already
1502 : * set the version correctly
1503 : */
1504 0 : TALLOC_FREE(ctx);
1505 0 : return NT_STATUS_OK;
1506 : }
1507 :
1508 0 : status = g_lock_lock(ctx,
1509 : key,
1510 : G_LOCK_UPGRADE,
1511 0 : (struct timeval) { .tv_sec = 60 },
1512 : NULL,
1513 : NULL);
1514 0 : if (!NT_STATUS_IS_OK(status)) {
1515 0 : DBG_WARNING("g_lock_lock(G_LOCK_WRITE) failed: %s\n",
1516 : nt_errstr(status));
1517 0 : DBG_ERR("smbd %s already running, refusing to start "
1518 : "version %s\n", state.version, version);
1519 0 : TALLOC_FREE(ctx);
1520 0 : return NT_STATUS_SXS_VERSION_CONFLICT;
1521 : }
1522 :
1523 0 : status = g_lock_write_data(
1524 0 : ctx, key, (const uint8_t *)version, strlen(version)+1);
1525 0 : if (!NT_STATUS_IS_OK(status)) {
1526 0 : DBG_WARNING("g_lock_write_data failed: %s\n",
1527 : nt_errstr(status));
1528 0 : TALLOC_FREE(ctx);
1529 0 : return status;
1530 : }
1531 :
1532 0 : status = g_lock_lock(ctx,
1533 : key,
1534 : G_LOCK_DOWNGRADE,
1535 0 : (struct timeval) { .tv_sec = 60 },
1536 : NULL,
1537 : NULL);
1538 0 : if (!NT_STATUS_IS_OK(status)) {
1539 0 : DBG_WARNING("g_lock_lock(G_LOCK_READ) failed: %s\n",
1540 : nt_errstr(status));
1541 0 : TALLOC_FREE(ctx);
1542 0 : return status;
1543 : }
1544 :
1545 : /*
1546 : * Leave "ctx" dangling so that g_lock.tdb keeps opened.
1547 : */
1548 0 : return NT_STATUS_OK;
1549 : }
1550 :
1551 : /****************************************************************************
1552 : Open socket communication on given ip address
1553 : ****************************************************************************/
1554 :
1555 0 : static bool smbd_open_socket_for_ip(struct smbd_parent_context *parent,
1556 : struct tevent_context *ev_ctx,
1557 : struct messaging_context *msg_ctx,
1558 : const char *smb_ports,
1559 : const struct sockaddr_storage *ifss)
1560 : {
1561 0 : int j;
1562 0 : const char **ports;
1563 0 : unsigned dns_port = 0;
1564 0 : TALLOC_CTX *ctx;
1565 0 : bool status = true;
1566 :
1567 0 : ports = lp_smb_ports();
1568 0 : ctx = talloc_stackframe();
1569 :
1570 : /* use a reasonable default set of ports - listing on 445 and 139 */
1571 0 : if (smb_ports) {
1572 0 : char **l;
1573 0 : l = str_list_make_v3(ctx, smb_ports, NULL);
1574 0 : ports = discard_const_p(const char *, l);
1575 : }
1576 :
1577 0 : for (j = 0; ports && ports[j]; j++) {
1578 0 : unsigned port = atoi(ports[j]);
1579 :
1580 : /* Keep the first port for mDNS service
1581 : * registration.
1582 : */
1583 0 : if (dns_port == 0) {
1584 0 : dns_port = port;
1585 : }
1586 :
1587 0 : if (!smbd_open_one_socket(parent,
1588 : ev_ctx,
1589 : ifss,
1590 : port)) {
1591 0 : status = false;
1592 0 : goto out_free;
1593 : }
1594 : }
1595 :
1596 0 : out_free:
1597 0 : TALLOC_FREE(ctx);
1598 0 : return status;
1599 : }
1600 :
1601 : struct smbd_addrchanged_state {
1602 : struct addrchange_context *ctx;
1603 : struct tevent_context *ev;
1604 : struct messaging_context *msg_ctx;
1605 : struct smbd_parent_context *parent;
1606 : char *ports;
1607 : };
1608 :
1609 : static void smbd_addr_changed(struct tevent_req *req);
1610 :
1611 0 : static void smbd_init_addrchange(TALLOC_CTX *mem_ctx,
1612 : struct tevent_context *ev,
1613 : struct messaging_context *msg_ctx,
1614 : struct smbd_parent_context *parent,
1615 : char *ports)
1616 : {
1617 0 : struct smbd_addrchanged_state *state;
1618 0 : struct tevent_req *req;
1619 0 : NTSTATUS status;
1620 :
1621 0 : state = talloc(mem_ctx, struct smbd_addrchanged_state);
1622 0 : if (state == NULL) {
1623 0 : DBG_DEBUG("talloc failed\n");
1624 0 : return;
1625 : }
1626 0 : *state = (struct smbd_addrchanged_state) {
1627 : .ev = ev,
1628 : .msg_ctx = msg_ctx,
1629 : .parent = parent,
1630 : .ports = ports
1631 : };
1632 :
1633 0 : status = addrchange_context_create(state, &state->ctx);
1634 0 : if (!NT_STATUS_IS_OK(status)) {
1635 0 : DBG_DEBUG("addrchange_context_create failed: %s\n",
1636 : nt_errstr(status));
1637 0 : TALLOC_FREE(state);
1638 0 : return;
1639 : }
1640 0 : req = addrchange_send(state, ev, state->ctx);
1641 0 : if (req == NULL) {
1642 0 : DBG_ERR("addrchange_send failed\n");
1643 0 : TALLOC_FREE(state);
1644 0 : return;
1645 : }
1646 0 : tevent_req_set_callback(req, smbd_addr_changed, state);
1647 : }
1648 :
1649 0 : static void smbd_close_socket_for_ip(struct smbd_parent_context *parent,
1650 : struct messaging_context *msg_ctx,
1651 : struct sockaddr_storage *addr)
1652 : {
1653 0 : struct smbd_open_socket *s = NULL;
1654 :
1655 0 : for (s = parent->sockets; s != NULL; s = s->next) {
1656 0 : struct sockaddr_storage a;
1657 0 : socklen_t addr_len = sizeof(a);
1658 :
1659 0 : if (getsockname(s->fd, (struct sockaddr *)&a, &addr_len) < 0) {
1660 0 : DBG_NOTICE("smbd: Unable to get address - skip\n");
1661 0 : continue;
1662 : }
1663 0 : if (sockaddr_equal((struct sockaddr *)&a,
1664 : (struct sockaddr *)addr)) {
1665 0 : char addrstr[INET6_ADDRSTRLEN];
1666 0 : DATA_BLOB blob;
1667 0 : NTSTATUS status;
1668 :
1669 0 : DLIST_REMOVE(parent->sockets, s);
1670 0 : TALLOC_FREE(s);
1671 0 : print_sockaddr(addrstr, sizeof(addrstr), addr);
1672 0 : DBG_NOTICE("smbd: Closed listening socket for %s\n",
1673 : addrstr);
1674 :
1675 0 : blob = data_blob_const(addrstr, strlen(addrstr)+1);
1676 0 : status = messaging_send(msg_ctx,
1677 : messaging_server_id(msg_ctx),
1678 : MSG_SMB_IP_DROPPED,
1679 : &blob);
1680 0 : if (!NT_STATUS_IS_OK(status)) {
1681 0 : DBG_NOTICE(
1682 : "messaging_send failed: %s - ignoring\n",
1683 : nt_errstr(status));
1684 : }
1685 0 : return;
1686 : }
1687 : }
1688 : }
1689 :
1690 0 : static void smbd_addr_changed(struct tevent_req *req)
1691 : {
1692 0 : struct smbd_addrchanged_state *state = tevent_req_callback_data(
1693 : req, struct smbd_addrchanged_state);
1694 0 : enum addrchange_type type;
1695 0 : struct sockaddr_storage addr;
1696 0 : NTSTATUS status;
1697 0 : uint32_t if_index;
1698 0 : bool match;
1699 :
1700 0 : status = addrchange_recv(req, &type, &addr, &if_index);
1701 0 : TALLOC_FREE(req);
1702 0 : if (!NT_STATUS_IS_OK(status)) {
1703 0 : DBG_DEBUG("addrchange_recv failed: %s, stop listening\n",
1704 : nt_errstr(status));
1705 0 : TALLOC_FREE(state);
1706 0 : return;
1707 : }
1708 :
1709 0 : match = interface_ifindex_exists_with_options(if_index,
1710 : IFACE_DYNAMIC_OPTION);
1711 0 : if (!match) {
1712 0 : DBG_NOTICE(
1713 : "smbd: No interface present for if_index %u "
1714 : "with dynamic option\n",
1715 : if_index);
1716 0 : goto rearm;
1717 : }
1718 :
1719 0 : if (type == ADDRCHANGE_DEL) {
1720 0 : char addrstr[INET6_ADDRSTRLEN];
1721 :
1722 0 : print_sockaddr(addrstr, sizeof(addrstr), &addr);
1723 :
1724 0 : DBG_NOTICE("smbd: kernel (AF_NETLINK) dropped ip %s "
1725 : "on if_index %u\n",
1726 : addrstr, if_index);
1727 :
1728 0 : smbd_close_socket_for_ip(state->parent, state->msg_ctx, &addr);
1729 :
1730 0 : goto rearm;
1731 : }
1732 :
1733 0 : if (type == ADDRCHANGE_ADD) {
1734 0 : char addrstr[INET6_ADDRSTRLEN];
1735 :
1736 0 : print_sockaddr(addrstr, sizeof(addrstr), &addr);
1737 :
1738 0 : DBG_NOTICE("smbd: kernel (AF_NETLINK) added ip %s "
1739 : "on if_index %u\n",
1740 : addrstr, if_index);
1741 :
1742 0 : if (!smbd_open_socket_for_ip(state->parent,
1743 : state->ev,
1744 : state->msg_ctx,
1745 0 : state->ports,
1746 : &addr)) {
1747 0 : DBG_NOTICE("smbd: Unable to open socket on %s\n",
1748 : addrstr);
1749 : }
1750 : }
1751 0 : rearm:
1752 0 : req = addrchange_send(state, state->ev, state->ctx);
1753 0 : if (req == NULL) {
1754 0 : DBG_ERR("addrchange_send failed\n");
1755 0 : TALLOC_FREE(state);
1756 0 : return;
1757 : }
1758 0 : tevent_req_set_callback(req, smbd_addr_changed, state);
1759 : }
1760 :
1761 : /****************************************************************************
1762 : main program.
1763 : ****************************************************************************/
1764 :
1765 : /* Declare prototype for build_options() to avoid having to run it through
1766 : mkproto.h. Mixing $(builddir) and $(srcdir) source files in the current
1767 : prototype generation system is too complicated. */
1768 :
1769 : extern void build_options(bool screen);
1770 :
1771 50 : int main(int argc,const char *argv[])
1772 : {
1773 : /* shall I run as a daemon */
1774 50 : struct samba_cmdline_daemon_cfg *cmdline_daemon_cfg = NULL;
1775 50 : bool log_stdout = false;
1776 50 : char *ports = NULL;
1777 50 : char *profile_level = NULL;
1778 2 : int opt;
1779 2 : poptContext pc;
1780 50 : struct server_id main_server_id = {0};
1781 200 : struct poptOption long_options[] = {
1782 : POPT_AUTOHELP
1783 : {
1784 : .longName = "build-options",
1785 : .shortName = 'b',
1786 : .argInfo = POPT_ARG_NONE,
1787 : .arg = NULL,
1788 : .val = 'b',
1789 : .descrip = "Print build options" ,
1790 : },
1791 : {
1792 : .longName = "port",
1793 : .shortName = 'p',
1794 : .argInfo = POPT_ARG_STRING,
1795 : .arg = &ports,
1796 : .val = 0,
1797 : .descrip = "Listen on the specified ports",
1798 : },
1799 : {
1800 : .longName = "profiling-level",
1801 : .shortName = 'P',
1802 : .argInfo = POPT_ARG_STRING,
1803 : .arg = &profile_level,
1804 : .val = 0,
1805 : .descrip = "Set profiling level","PROFILE_LEVEL",
1806 : },
1807 50 : POPT_COMMON_SAMBA
1808 50 : POPT_COMMON_DAEMON
1809 50 : POPT_COMMON_VERSION
1810 : POPT_TABLEEND
1811 : };
1812 50 : struct smbd_parent_context *parent = NULL;
1813 2 : TALLOC_CTX *frame;
1814 2 : NTSTATUS status;
1815 2 : struct tevent_context *ev_ctx;
1816 2 : struct messaging_context *msg_ctx;
1817 2 : struct server_id server_id;
1818 2 : struct tevent_signal *se;
1819 2 : int profiling_level;
1820 50 : char *np_dir = NULL;
1821 2 : const struct loadparm_substitution *lp_sub =
1822 50 : loadparm_s3_global_substitution();
1823 2 : static const struct smbd_shim smbd_shim_fns =
1824 : {
1825 : .change_to_root_user = smbd_change_to_root_user,
1826 : .become_authenticated_pipe_user = smbd_become_authenticated_pipe_user,
1827 : .unbecome_authenticated_pipe_user = smbd_unbecome_authenticated_pipe_user,
1828 :
1829 : .contend_level2_oplocks_begin = smbd_contend_level2_oplocks_begin,
1830 : .contend_level2_oplocks_end = smbd_contend_level2_oplocks_end,
1831 :
1832 : .become_root = smbd_become_root,
1833 : .unbecome_root = smbd_unbecome_root,
1834 :
1835 : .exit_server = smbd_exit_server,
1836 : .exit_server_cleanly = smbd_exit_server_cleanly,
1837 : };
1838 2 : bool ok;
1839 :
1840 50 : setproctitle_init(argc, discard_const(argv), environ);
1841 :
1842 : /*
1843 : * Do this before any other talloc operation
1844 : */
1845 50 : talloc_enable_null_tracking();
1846 50 : frame = talloc_stackframe();
1847 :
1848 50 : smb_init_locale();
1849 :
1850 50 : set_smbd_shim(&smbd_shim_fns);
1851 :
1852 50 : smbd_init_globals();
1853 :
1854 50 : TimeInit();
1855 :
1856 : #ifdef HAVE_SET_AUTH_PARAMETERS
1857 : set_auth_parameters(argc,argv);
1858 : #endif
1859 :
1860 50 : ok = samba_cmdline_init(frame,
1861 : SAMBA_CMDLINE_CONFIG_SERVER,
1862 : true /* require_smbconf */);
1863 50 : if (!ok) {
1864 0 : DBG_ERR("Failed to setup cmdline parser!\n");
1865 0 : exit(ENOMEM);
1866 : }
1867 :
1868 50 : cmdline_daemon_cfg = samba_cmdline_get_daemon_cfg();
1869 :
1870 50 : pc = samba_popt_get_context(getprogname(),
1871 : argc,
1872 : argv,
1873 : long_options,
1874 : 0);
1875 50 : if (pc == NULL) {
1876 0 : DBG_ERR("Failed to get popt context!\n");
1877 0 : exit(ENOMEM);
1878 : }
1879 :
1880 50 : while((opt = poptGetNextOpt(pc)) != -1) {
1881 50 : switch (opt) {
1882 50 : case 'b':
1883 50 : build_options(true); /* Display output to screen as well as debug */
1884 50 : exit(0);
1885 0 : break;
1886 0 : default:
1887 0 : d_fprintf(stderr, "\nInvalid option %s: %s\n\n",
1888 : poptBadOption(pc, 0), poptStrerror(opt));
1889 0 : poptPrintUsage(pc, stderr, 0);
1890 0 : exit(1);
1891 : }
1892 : }
1893 0 : poptFreeContext(pc);
1894 :
1895 0 : log_stdout = (debug_get_log_type() == DEBUG_STDOUT);
1896 :
1897 0 : if (cmdline_daemon_cfg->interactive) {
1898 0 : log_stdout = True;
1899 : }
1900 :
1901 : #ifdef HAVE_SETLUID
1902 : /* needed for SecureWare on SCO */
1903 : setluid(0);
1904 : #endif
1905 :
1906 0 : set_remote_machine_name("smbd", False);
1907 :
1908 0 : if (cmdline_daemon_cfg->interactive && (DEBUGLEVEL >= 9)) {
1909 0 : talloc_enable_leak_report();
1910 : }
1911 :
1912 0 : if (log_stdout && cmdline_daemon_cfg->fork) {
1913 0 : DEBUG(0,("ERROR: Can't log to stdout (-S) unless daemon is in foreground (-F) or interactive (-i)\n"));
1914 0 : exit(1);
1915 : }
1916 :
1917 : /*
1918 : * We want to die early if we can't open /dev/urandom
1919 : */
1920 0 : generate_random_buffer(NULL, 0);
1921 :
1922 : /* get initial effective uid and gid */
1923 0 : sec_init();
1924 :
1925 : /* make absolutely sure we run as root - to handle cases where people
1926 : are crazy enough to have it setuid */
1927 0 : gain_root_privilege();
1928 0 : gain_root_group_privilege();
1929 :
1930 0 : dump_core_setup("smbd", lp_logfile(talloc_tos(), lp_sub));
1931 :
1932 : /* we are never interested in SIGPIPE */
1933 0 : BlockSignals(True,SIGPIPE);
1934 :
1935 : #if defined(SIGFPE)
1936 : /* we are never interested in SIGFPE */
1937 0 : BlockSignals(True,SIGFPE);
1938 : #endif
1939 :
1940 : #if defined(SIGUSR2)
1941 : /* We are no longer interested in USR2 */
1942 0 : BlockSignals(True,SIGUSR2);
1943 : #endif
1944 :
1945 : /*
1946 : * POSIX demands that signals are inherited. If the invoking
1947 : * process has these signals masked, we will have problems, as
1948 : * we won't receive them.
1949 : */
1950 0 : BlockSignals(False, SIGHUP);
1951 0 : BlockSignals(False, SIGUSR1);
1952 0 : BlockSignals(False, SIGTERM);
1953 :
1954 : /* Ensure we leave no zombies until we
1955 : * correctly set up child handling below. */
1956 :
1957 0 : CatchChild();
1958 :
1959 : /* we want total control over the permissions on created files,
1960 : so set our umask to 0 */
1961 0 : umask(0);
1962 :
1963 0 : reopen_logs();
1964 :
1965 0 : DBG_STARTUP_NOTICE("smbd version %s started.\n%s\n",
1966 : samba_version_string(),
1967 : samba_copyright_string());
1968 :
1969 0 : DEBUG(2,("uid=%d gid=%d euid=%d egid=%d\n",
1970 : (int)getuid(),(int)getgid(),(int)geteuid(),(int)getegid()));
1971 :
1972 : /* Output the build options to the debug log */
1973 0 : build_options(False);
1974 :
1975 0 : if (sizeof(uint16_t) < 2 || sizeof(uint32_t) < 4) {
1976 : DEBUG(0,("ERROR: Samba is not configured correctly for the word size on your machine\n"));
1977 : exit(1);
1978 : }
1979 :
1980 : /*
1981 : * This calls unshare(CLONE_FS); on linux
1982 : * in order to check if the running kernel/container
1983 : * environment supports it.
1984 : */
1985 0 : per_thread_cwd_check();
1986 :
1987 0 : if (!cluster_probe_ok()) {
1988 0 : exit(1);
1989 : }
1990 :
1991 : /* Init the security context and global current_user */
1992 0 : init_sec_ctx();
1993 :
1994 : /*
1995 : * Initialize the event context. The event context needs to be
1996 : * initialized before the messaging context, cause the messaging
1997 : * context holds an event context.
1998 : */
1999 0 : ev_ctx = global_event_context();
2000 0 : if (ev_ctx == NULL) {
2001 0 : exit(1);
2002 : }
2003 :
2004 : /*
2005 : * Init the messaging context
2006 : * FIXME: This should only call messaging_init()
2007 : */
2008 0 : msg_ctx = global_messaging_context();
2009 0 : if (msg_ctx == NULL) {
2010 0 : exit(1);
2011 : }
2012 :
2013 : /*
2014 : * Reloading of the printers will not work here as we don't have a
2015 : * server info and rpc services set up. It will be called later.
2016 : */
2017 0 : if (!reload_services(NULL, NULL, false)) {
2018 0 : exit(1);
2019 : }
2020 :
2021 0 : if (lp_server_role() == ROLE_ACTIVE_DIRECTORY_DC) {
2022 0 : if (!lp_parm_bool(-1, "server role check", "inhibit", false)) {
2023 0 : DBG_ERR("server role = 'active directory domain controller' not compatible with running smbd standalone. \n");
2024 0 : DEBUGADD(0, ("You should start 'samba' instead, and it will control starting smbd if required\n"));
2025 0 : exit(1);
2026 : }
2027 : /* Main 'samba' daemon will notify */
2028 0 : daemon_sd_notifications(false);
2029 : }
2030 :
2031 : /* ...NOTE... Log files are working from this point! */
2032 :
2033 0 : DEBUG(3,("loaded services\n"));
2034 :
2035 0 : init_structs();
2036 :
2037 0 : if (!profile_setup(msg_ctx, False)) {
2038 0 : DEBUG(0,("ERROR: failed to setup profiling\n"));
2039 0 : return -1;
2040 : }
2041 :
2042 0 : if (profile_level != NULL) {
2043 0 : profiling_level = atoi(profile_level);
2044 : } else {
2045 0 : profiling_level = lp_smbd_profiling_level();
2046 : }
2047 0 : main_server_id = messaging_server_id(msg_ctx);
2048 0 : set_profile_level(profiling_level, &main_server_id);
2049 :
2050 0 : if (!cmdline_daemon_cfg->daemon && !is_a_socket(0)) {
2051 0 : if (!cmdline_daemon_cfg->interactive) {
2052 0 : DEBUG(3, ("Standard input is not a socket, "
2053 : "assuming -D option\n"));
2054 : }
2055 :
2056 : /*
2057 : * Setting "daemon" here prevents us from eventually calling
2058 : * the open_sockets_inetd()
2059 : */
2060 :
2061 0 : cmdline_daemon_cfg->daemon = true;
2062 : }
2063 :
2064 0 : if (cmdline_daemon_cfg->daemon && !cmdline_daemon_cfg->interactive) {
2065 0 : DEBUG(3, ("Becoming a daemon.\n"));
2066 0 : become_daemon(cmdline_daemon_cfg->fork,
2067 0 : cmdline_daemon_cfg->no_process_group,
2068 : log_stdout);
2069 : } else {
2070 0 : daemon_status("smbd", "Starting process ...");
2071 : }
2072 :
2073 : #ifdef HAVE_SETPGID
2074 : /*
2075 : * If we're interactive we want to set our own process group for
2076 : * signal management.
2077 : */
2078 0 : if (cmdline_daemon_cfg->interactive &&
2079 0 : !cmdline_daemon_cfg->no_process_group)
2080 : {
2081 0 : setpgid( (pid_t)0, (pid_t)0);
2082 : }
2083 : #endif
2084 :
2085 0 : if (!directory_exist(lp_lock_directory()))
2086 0 : mkdir(lp_lock_directory(), 0755);
2087 :
2088 0 : if (!directory_exist(lp_pid_directory()))
2089 0 : mkdir(lp_pid_directory(), 0755);
2090 :
2091 0 : if (cmdline_daemon_cfg->daemon)
2092 0 : pidfile_create(lp_pid_directory(), "smbd");
2093 :
2094 0 : status = reinit_after_fork(msg_ctx, ev_ctx, false);
2095 0 : if (!NT_STATUS_IS_OK(status)) {
2096 0 : exit_daemon("reinit_after_fork() failed", map_errno_from_nt_status(status));
2097 : }
2098 :
2099 0 : if (!cmdline_daemon_cfg->interactive) {
2100 : /*
2101 : * Do not initialize the parent-child-pipe before becoming a
2102 : * daemon: this is used to detect a died parent in the child
2103 : * process.
2104 : */
2105 0 : status = init_before_fork();
2106 0 : if (!NT_STATUS_IS_OK(status)) {
2107 0 : exit_daemon(nt_errstr(status), map_errno_from_nt_status(status));
2108 : }
2109 : }
2110 :
2111 0 : parent = talloc_zero(ev_ctx, struct smbd_parent_context);
2112 0 : if (!parent) {
2113 0 : exit_server("talloc(struct smbd_parent_context) failed");
2114 : }
2115 0 : parent->interactive = cmdline_daemon_cfg->interactive;
2116 0 : parent->ev_ctx = ev_ctx;
2117 0 : parent->msg_ctx = msg_ctx;
2118 0 : am_parent = parent;
2119 :
2120 0 : se = tevent_add_signal(parent->ev_ctx,
2121 : parent,
2122 : SIGTERM, 0,
2123 : smbd_parent_sig_term_handler,
2124 : parent);
2125 0 : if (!se) {
2126 0 : exit_server("failed to setup SIGTERM handler");
2127 : }
2128 0 : se = tevent_add_signal(parent->ev_ctx,
2129 : parent,
2130 : SIGHUP, 0,
2131 : smbd_parent_sig_hup_handler,
2132 : parent);
2133 0 : if (!se) {
2134 0 : exit_server("failed to setup SIGHUP handler");
2135 : }
2136 :
2137 : /* Setup all the TDB's - including CLEAR_IF_FIRST tdb's. */
2138 :
2139 0 : if (smbd_memcache() == NULL) {
2140 0 : exit_daemon("no memcache available", EACCES);
2141 : }
2142 :
2143 0 : memcache_set_global(smbd_memcache());
2144 :
2145 : /* Initialise the password backed before the global_sam_sid
2146 : to ensure that we fetch from ldap before we make a domain sid up */
2147 :
2148 0 : if(!initialize_password_db(false, ev_ctx))
2149 0 : exit(1);
2150 :
2151 0 : if (!secrets_init()) {
2152 0 : exit_daemon("smbd can not open secrets.tdb", EACCES);
2153 : }
2154 :
2155 0 : if (lp_server_role() == ROLE_DOMAIN_BDC || lp_server_role() == ROLE_DOMAIN_PDC || lp_server_role() == ROLE_IPA_DC) {
2156 0 : struct loadparm_context *lp_ctx = loadparm_init_s3(NULL, loadparm_s3_helpers());
2157 0 : if (!open_schannel_session_store(NULL, lp_ctx)) {
2158 0 : exit_daemon("ERROR: Samba cannot open schannel store for secured NETLOGON operations.", EACCES);
2159 : }
2160 0 : TALLOC_FREE(lp_ctx);
2161 : }
2162 :
2163 0 : if(!get_global_sam_sid()) {
2164 0 : exit_daemon("Samba cannot create a SAM SID", EACCES);
2165 : }
2166 :
2167 0 : server_id = messaging_server_id(msg_ctx);
2168 0 : status = smbXsrv_version_global_init(&server_id);
2169 0 : if (!NT_STATUS_IS_OK(status)) {
2170 0 : exit_daemon("Samba cannot init server context", EACCES);
2171 : }
2172 :
2173 0 : status = smbXsrv_client_global_init();
2174 0 : if (!NT_STATUS_IS_OK(status)) {
2175 0 : exit_daemon("Samba cannot init clients context", EACCES);
2176 : }
2177 :
2178 0 : status = smbXsrv_session_global_init(msg_ctx);
2179 0 : if (!NT_STATUS_IS_OK(status)) {
2180 0 : exit_daemon("Samba cannot init session context", EACCES);
2181 : }
2182 :
2183 0 : status = smbXsrv_tcon_global_init();
2184 0 : if (!NT_STATUS_IS_OK(status)) {
2185 0 : exit_daemon("Samba cannot init tcon context", EACCES);
2186 : }
2187 :
2188 0 : if (!locking_init())
2189 0 : exit_daemon("Samba cannot init locking", EACCES);
2190 :
2191 0 : if (!leases_db_init(false)) {
2192 0 : exit_daemon("Samba cannot init leases", EACCES);
2193 : }
2194 :
2195 0 : if (!smbd_notifyd_init(
2196 : msg_ctx,
2197 0 : cmdline_daemon_cfg->interactive,
2198 : &parent->notifyd)) {
2199 0 : exit_daemon("Samba cannot init notification", EACCES);
2200 : }
2201 :
2202 0 : if (!cleanupd_init(
2203 : msg_ctx,
2204 0 : cmdline_daemon_cfg->interactive,
2205 : &parent->cleanupd)) {
2206 0 : exit_daemon("Samba cannot init the cleanupd", EACCES);
2207 : }
2208 :
2209 0 : if (!messaging_parent_dgm_cleanup_init(msg_ctx)) {
2210 0 : exit(1);
2211 : }
2212 :
2213 0 : if (!smbd_scavenger_init(NULL, msg_ctx, ev_ctx)) {
2214 0 : exit_daemon("Samba cannot init scavenging", EACCES);
2215 : }
2216 :
2217 0 : if (!W_ERROR_IS_OK(registry_init_full()))
2218 0 : exit_daemon("Samba cannot init registry", EACCES);
2219 :
2220 : /* Open the share_info.tdb here, so we don't have to open
2221 : after the fork on every single connection. This is a small
2222 : performance improvement and reduces the total number of system
2223 : fds used. */
2224 0 : status = share_info_db_init();
2225 0 : if (!NT_STATUS_IS_OK(status)) {
2226 0 : exit_daemon("ERROR: failed to load share info db.", EACCES);
2227 : }
2228 :
2229 0 : status = init_system_session_info(NULL);
2230 0 : if (!NT_STATUS_IS_OK(status)) {
2231 0 : DEBUG(1, ("ERROR: failed to setup system user info: %s.\n",
2232 : nt_errstr(status)));
2233 0 : return -1;
2234 : }
2235 :
2236 0 : if (!init_guest_session_info(NULL)) {
2237 0 : DEBUG(0,("ERROR: failed to setup guest info.\n"));
2238 0 : return -1;
2239 : }
2240 :
2241 0 : if (!file_init_global()) {
2242 0 : DEBUG(0, ("ERROR: file_init_global() failed\n"));
2243 0 : return -1;
2244 : }
2245 0 : status = smbXsrv_open_global_init();
2246 0 : if (!NT_STATUS_IS_OK(status)) {
2247 0 : exit_daemon("Samba cannot init global open", map_errno_from_nt_status(status));
2248 : }
2249 :
2250 0 : if (lp_clustering() && !lp_allow_unsafe_cluster_upgrade()) {
2251 0 : status = smbd_claim_version(msg_ctx, samba_version_string());
2252 0 : if (!NT_STATUS_IS_OK(status)) {
2253 0 : DBG_ERR("Could not claim version: %s\n",
2254 : nt_errstr(status));
2255 0 : return -1;
2256 : }
2257 : }
2258 :
2259 : /* This MUST be done before start_epmd() because otherwise
2260 : * start_epmd() forks and races against dcesrv_ep_setup() to
2261 : * call directory_create_or_exist() */
2262 0 : if (!directory_create_or_exist(lp_ncalrpc_dir(), 0755)) {
2263 0 : DEBUG(0, ("Failed to create pipe directory %s - %s\n",
2264 : lp_ncalrpc_dir(), strerror(errno)));
2265 0 : return -1;
2266 : }
2267 :
2268 0 : np_dir = talloc_asprintf(talloc_tos(), "%s/np", lp_ncalrpc_dir());
2269 0 : if (!np_dir) {
2270 0 : DEBUG(0, ("%s: Out of memory\n", __location__));
2271 0 : return -1;
2272 : }
2273 :
2274 0 : if (!directory_create_or_exist_strict(np_dir, geteuid(), 0700)) {
2275 0 : DEBUG(0, ("Failed to create pipe directory %s - %s\n",
2276 : np_dir, strerror(errno)));
2277 0 : return -1;
2278 : }
2279 :
2280 0 : if (!cmdline_daemon_cfg->interactive) {
2281 0 : daemon_ready("smbd");
2282 : }
2283 :
2284 0 : if (!cmdline_daemon_cfg->daemon) {
2285 0 : int ret, sock;
2286 :
2287 : /* inetd mode */
2288 0 : TALLOC_FREE(frame);
2289 :
2290 : /* Started from inetd. fd 0 is the socket. */
2291 : /* We will abort gracefully when the client or remote system
2292 : goes away */
2293 0 : sock = dup(0);
2294 :
2295 : /* close stdin, stdout (if not logging to it), but not stderr */
2296 0 : ret = close_low_fd(0);
2297 0 : if (ret != 0) {
2298 0 : DBG_ERR("close_low_fd(0) failed: %s\n", strerror(ret));
2299 0 : return 1;
2300 : }
2301 0 : if (!debug_get_output_is_stdout()) {
2302 0 : ret = close_low_fd(1);
2303 0 : if (ret != 0) {
2304 0 : DBG_ERR("close_low_fd(1) failed: %s\n",
2305 : strerror(ret));
2306 0 : return 1;
2307 : }
2308 : }
2309 :
2310 : #ifdef HAVE_ATEXIT
2311 0 : atexit(killkids);
2312 : #endif
2313 :
2314 : /* Stop zombies */
2315 0 : smbd_setup_sig_chld_handler(parent);
2316 :
2317 0 : smbd_process(ev_ctx, msg_ctx, sock, true);
2318 :
2319 0 : exit_server_cleanly(NULL);
2320 : return(0);
2321 : }
2322 :
2323 0 : if (lp_interfaces() && lp_bind_interfaces_only()) {
2324 0 : smbd_init_addrchange(NULL, ev_ctx, msg_ctx, parent, ports);
2325 : }
2326 :
2327 0 : if (!open_sockets_smbd(parent, ev_ctx, msg_ctx, ports))
2328 0 : exit_server("open_sockets_smbd() failed");
2329 :
2330 0 : TALLOC_FREE(frame);
2331 : /* make sure we always have a valid stackframe */
2332 0 : frame = talloc_stackframe();
2333 :
2334 0 : if (!cmdline_daemon_cfg->fork) {
2335 : /* if we are running in the foreground then look for
2336 : EOF on stdin, and exit if it happens. This allows
2337 : us to die if the parent process dies
2338 : Only do this on a pipe or socket, no other device.
2339 : */
2340 0 : struct stat st;
2341 0 : if (fstat(0, &st) != 0) {
2342 0 : return 1;
2343 : }
2344 0 : if (S_ISFIFO(st.st_mode) || S_ISSOCK(st.st_mode)) {
2345 0 : tevent_add_fd(ev_ctx,
2346 : parent,
2347 : 0,
2348 : TEVENT_FD_READ,
2349 : smbd_stdin_handler,
2350 : NULL);
2351 : }
2352 : }
2353 :
2354 0 : smbd_parent_loop(ev_ctx, parent);
2355 :
2356 0 : exit_server_cleanly(NULL);
2357 : TALLOC_FREE(frame);
2358 : return(0);
2359 : }
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