1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
23 * Copyright 2018 Nexenta Systems, Inc. All rights reserved.
24 * Copyright 2022 RackTop Systems, Inc.
25 */
26
27 #include <sys/types.h>
28 #include <sys/stat.h>
29 #include <sys/ioccom.h>
30 #include <sys/corectl.h>
31 #include <stdio.h>
32 #include <string.h>
33 #include <strings.h>
34 #include <stdlib.h>
35 #include <unistd.h>
36 #include <stdarg.h>
37 #include <fcntl.h>
38 #include <wait.h>
39 #include <signal.h>
40 #include <atomic.h>
41 #include <libscf.h>
42 #include <limits.h>
43 #include <priv_utils.h>
44 #include <door.h>
45 #include <errno.h>
46 #include <pthread.h>
47 #include <time.h>
48 #include <libscf.h>
49 #include <zone.h>
50 #include <libgen.h>
51 #include <pwd.h>
52 #include <grp.h>
53
54 #include <smbsrv/smb_door.h>
55 #include <smbsrv/smb_ioctl.h>
56 #include <smbsrv/string.h>
57 #include <smbsrv/libsmb.h>
58 #include <smbsrv/libsmbns.h>
59 #include <smbsrv/libmlsvc.h>
60 #include "smbd.h"
61
62 #define SECSPERMIN 60
63 #define SMBD_ONLINE_WAIT_INTERVAL 10
64 #define SMBD_REFRESH_INTERVAL 10
65 #define SMB_DBDIR "/var/smb"
66
67 static int smbd_daemonize_init(void);
68 static void smbd_daemonize_fini(int, int);
69 static int smb_init_daemon_priv(int, uid_t, gid_t);
70
71 static int smbd_kernel_bind(void);
72 static void smbd_kernel_unbind(void);
73 static int smbd_already_running(void);
74
75 static int smbd_service_init(void);
76 static void smbd_service_fini(void);
77
78 static int smbd_setup_options(int argc, char *argv[]);
79 static void smbd_usage(FILE *fp);
80
81 static int32_t smbd_gmtoff(void);
82 static void smbd_localtime_init(void);
83 static void *smbd_localtime_monitor(void *arg);
84
85 static void smbd_dyndns_init(void);
86 static void smbd_load_shares(void);
87 static void *smbd_share_loader(void *);
88
89 static void smbd_refresh_handler(void);
90
91 static int smbd_kernel_start(void);
92
93 smbd_t smbd;
94
95 /*
96 * Use SMF error codes only on return or exit.
97 */
98 int
main(int argc,char * argv[])99 main(int argc, char *argv[])
100 {
101 sigset_t set;
102 uid_t uid;
103 int pfd = -1;
104 int sigval;
105 struct rlimit rl;
106 int orig_limit;
107
108 #ifdef FKSMBD
109 fksmbd_init();
110 #endif
111 smbd.s_pname = basename(argv[0]);
112 openlog(smbd.s_pname, LOG_PID | LOG_NOWAIT, LOG_DAEMON);
113
114 if (smbd_setup_options(argc, argv) != 0)
115 return (SMF_EXIT_ERR_FATAL);
116
117 if ((uid = getuid()) != smbd.s_uid) {
118 #ifdef FKSMBD
119 /* Can't manipulate privileges in daemonize. */
120 if (smbd.s_fg == 0) {
121 smbd.s_fg = 1;
122 smbd_report("user %d (forced -f)", uid);
123 }
124 #else /* FKSMBD */
125 smbd_report("user %d: %s", uid, strerror(EPERM));
126 return (SMF_EXIT_ERR_FATAL);
127 #endif /* FKSMBD */
128 }
129
130 if (is_system_labeled()) {
131 smbd_report("Trusted Extensions not supported");
132 return (SMF_EXIT_ERR_FATAL);
133 }
134
135 if (smbd_already_running())
136 return (SMF_EXIT_OK);
137
138 /*
139 * Raise the file descriptor limit to accommodate simultaneous user
140 * authentications/file access.
141 */
142 if ((getrlimit(RLIMIT_NOFILE, &rl) == 0) &&
143 (rl.rlim_cur < rl.rlim_max)) {
144 orig_limit = rl.rlim_cur;
145 rl.rlim_cur = rl.rlim_max;
146 if (setrlimit(RLIMIT_NOFILE, &rl) != 0)
147 smbd_report("Failed to raise file descriptor limit"
148 " from %d to %d", orig_limit, rl.rlim_cur);
149 }
150
151 /*
152 * Block async signals in all threads.
153 */
154 (void) sigemptyset(&set);
155
156 (void) sigaddset(&set, SIGHUP);
157 (void) sigaddset(&set, SIGINT);
158 (void) sigaddset(&set, SIGQUIT);
159 (void) sigaddset(&set, SIGPIPE);
160 (void) sigaddset(&set, SIGTERM);
161 (void) sigaddset(&set, SIGUSR1);
162 (void) sigaddset(&set, SIGUSR2);
163
164 (void) sigprocmask(SIG_SETMASK, &set, NULL);
165
166 if (smbd.s_fg) {
167 if (smbd_service_init() != 0) {
168 smbd_report("service initialization failed");
169 exit(SMF_EXIT_ERR_FATAL);
170 }
171 } else {
172 /*
173 * "pfd" is a pipe descriptor -- any fatal errors
174 * during subsequent initialization of the child
175 * process should be written to this pipe and the
176 * parent will report this error as the exit status.
177 */
178 pfd = smbd_daemonize_init();
179
180 if (smbd_service_init() != 0) {
181 smbd_report("daemon initialization failed");
182 exit(SMF_EXIT_ERR_FATAL);
183 }
184
185 smbd_daemonize_fini(pfd, SMF_EXIT_OK);
186 }
187
188 while (!smbd.s_shutting_down) {
189 sigval = sigwait(&set);
190
191 switch (sigval) {
192 case -1:
193 syslog(LOG_DEBUG, "sigwait failed: %s",
194 strerror(errno));
195 break;
196 case SIGPIPE:
197 break;
198
199 case SIGHUP:
200 syslog(LOG_DEBUG, "refresh requested");
201 smbd_refresh_handler();
202 break;
203
204 case SIGUSR1:
205 syslog(LOG_DEBUG, "SIGUSR1 ignored");
206 break;
207
208 default:
209 /*
210 * Typically SIGINT or SIGTERM.
211 */
212 smbd.s_shutting_down = B_TRUE;
213 break;
214 }
215 }
216
217 /*
218 * Allow termination signals while shutting down.
219 */
220 (void) sigemptyset(&set);
221
222 if (smbd.s_fg) {
223 (void) sigaddset(&set, SIGHUP);
224 (void) sigaddset(&set, SIGINT);
225 }
226 (void) sigaddset(&set, SIGTERM);
227
228 (void) sigprocmask(SIG_UNBLOCK, &set, NULL);
229
230 smbd_service_fini();
231 return ((smbd.s_fatal_error) ? SMF_EXIT_ERR_FATAL : SMF_EXIT_OK);
232 }
233
234 /*
235 * This function will fork off a child process,
236 * from which only the child will return.
237 *
238 * Use SMF error codes only on exit.
239 */
240 static int
smbd_daemonize_init(void)241 smbd_daemonize_init(void)
242 {
243 int status, pfds[2];
244 sigset_t set, oset;
245 pid_t pid;
246 int rc;
247
248 /*
249 * Reset privileges to the minimum set required. We continue
250 * to run as root to create and access files in /var.
251 */
252 rc = smb_init_daemon_priv(PU_RESETGROUPS, smbd.s_uid, smbd.s_gid);
253
254 if (rc != 0) {
255 smbd_report("insufficient privileges");
256 exit(SMF_EXIT_ERR_FATAL);
257 }
258
259 /*
260 * Block all signals prior to the fork and leave them blocked in the
261 * parent so we don't get in a situation where the parent gets SIGINT
262 * and returns non-zero exit status and the child is actually running.
263 * In the child, restore the signal mask once we've done our setsid().
264 */
265 (void) sigfillset(&set);
266 (void) sigdelset(&set, SIGABRT);
267 (void) sigprocmask(SIG_BLOCK, &set, &oset);
268
269 if (pipe(pfds) == -1) {
270 smbd_report("unable to create pipe");
271 exit(SMF_EXIT_ERR_FATAL);
272 }
273
274 closelog();
275
276 if ((pid = fork()) == -1) {
277 openlog(smbd.s_pname, LOG_PID | LOG_NOWAIT, LOG_DAEMON);
278 smbd_report("unable to fork");
279 closelog();
280 exit(SMF_EXIT_ERR_FATAL);
281 }
282
283 /*
284 * If we're the parent process, wait for either the child to send us
285 * the appropriate exit status over the pipe or for the read to fail
286 * (presumably with 0 for EOF if our child terminated abnormally).
287 * If the read fails, exit with either the child's exit status if it
288 * exited or with SMF_EXIT_ERR_FATAL if it died from a fatal signal.
289 */
290 if (pid != 0) {
291 (void) close(pfds[1]);
292
293 if (read(pfds[0], &status, sizeof (status)) == sizeof (status))
294 _exit(status);
295
296 if (waitpid(pid, &status, 0) == pid && WIFEXITED(status))
297 _exit(WEXITSTATUS(status));
298
299 _exit(SMF_EXIT_ERR_FATAL);
300 }
301
302 openlog(smbd.s_pname, LOG_PID | LOG_NOWAIT, LOG_DAEMON);
303 (void) setsid();
304 (void) sigprocmask(SIG_SETMASK, &oset, NULL);
305 (void) chdir("/");
306 (void) umask(022);
307 (void) close(pfds[0]);
308
309 return (pfds[1]);
310 }
311
312 /*
313 * This function is based on __init_daemon_priv() and replaces
314 * __init_daemon_priv() since we want smbd to have all privileges so that it
315 * can execute map/unmap commands with all privileges during share
316 * connection/disconnection. Unused privileges are disabled until command
317 * execution. The permitted and the limit set contains all privileges. The
318 * inheritable set contains no privileges.
319 */
320
321 static const char root_cp[] = "/core.%f.%t";
322 static const char daemon_cp[] = "/var/tmp/core.%f.%t";
323
324 static int
smb_init_daemon_priv(int flags,uid_t uid,gid_t gid)325 smb_init_daemon_priv(int flags, uid_t uid, gid_t gid)
326 {
327 priv_set_t *perm = NULL;
328 int ret = -1;
329 char buf[1024];
330
331 /*
332 * This is not a significant failure: it allows us to start programs
333 * with sufficient privileges and with the proper uid. We don't
334 * care enough about the extra groups in that case.
335 */
336 if (flags & PU_RESETGROUPS)
337 (void) setgroups(0, NULL);
338
339 if (gid != (gid_t)-1 && setgid(gid) != 0)
340 goto end;
341
342 perm = priv_allocset();
343 if (perm == NULL)
344 goto end;
345
346 /* E = P */
347 (void) getppriv(PRIV_PERMITTED, perm);
348 (void) setppriv(PRIV_SET, PRIV_EFFECTIVE, perm);
349
350 /* Now reset suid and euid */
351 if (uid != (uid_t)-1 && setreuid(uid, uid) != 0)
352 goto end;
353
354 /* I = 0 */
355 priv_emptyset(perm);
356 ret = setppriv(PRIV_SET, PRIV_INHERITABLE, perm);
357 end:
358 priv_freeset(perm);
359
360 if (core_get_process_path(buf, sizeof (buf), getpid()) == 0 &&
361 strcmp(buf, "core") == 0) {
362
363 if ((uid == (uid_t)-1 ? geteuid() : uid) == 0) {
364 (void) core_set_process_path(root_cp, sizeof (root_cp),
365 getpid());
366 } else {
367 (void) core_set_process_path(daemon_cp,
368 sizeof (daemon_cp), getpid());
369 }
370 }
371 (void) setpflags(__PROC_PROTECT, 0);
372
373 return (ret);
374 }
375
376 /*
377 * Most privileges, except the ones that are required for smbd, are turn off
378 * in the effective set. They will be turn on when needed for command
379 * execution during share connection/disconnection.
380 */
381 static void
smbd_daemonize_fini(int fd,int exit_status)382 smbd_daemonize_fini(int fd, int exit_status)
383 {
384 priv_set_t *pset;
385
386 /*
387 * Now that we're running, if a pipe fd was specified, write an exit
388 * status to it to indicate that our parent process can safely detach.
389 * Then proceed to loading the remaining non-built-in modules.
390 */
391 if (fd >= 0)
392 (void) write(fd, &exit_status, sizeof (exit_status));
393
394 (void) close(fd);
395
396 pset = priv_allocset();
397 if (pset == NULL)
398 return;
399
400 priv_basicset(pset);
401
402 /* list of privileges for smbd */
403 (void) priv_addset(pset, PRIV_NET_MAC_AWARE);
404 (void) priv_addset(pset, PRIV_NET_PRIVADDR);
405 (void) priv_addset(pset, PRIV_PROC_AUDIT);
406 (void) priv_addset(pset, PRIV_SYS_CONFIG);
407 (void) priv_addset(pset, PRIV_SYS_DEVICES);
408 (void) priv_addset(pset, PRIV_SYS_SMB);
409 (void) priv_addset(pset, PRIV_SYS_MOUNT);
410
411 priv_inverse(pset);
412
413 /* turn off unneeded privileges */
414 (void) setppriv(PRIV_OFF, PRIV_EFFECTIVE, pset);
415
416 priv_freeset(pset);
417
418 /* reenable core dumps */
419 __fini_daemon_priv(NULL);
420 }
421
422 /*
423 * smbd_service_init
424 */
425 static int
smbd_service_init(void)426 smbd_service_init(void)
427 {
428 static struct dir {
429 char *name;
430 int perm;
431 } dir[] = {
432 { SMB_DBDIR, 0700 },
433 { SMB_CVOL, 0755 },
434 { SMB_SYSROOT, 0755 },
435 { SMB_SYSTEM32, 0755 },
436 { SMB_VSS, 0755 },
437 { SMB_PIPE_DIR, 0755 },
438 { "/var/smb/lipc", 0755 },
439 };
440 int rc, i;
441
442 smbd.s_pid = getpid();
443
444 /*
445 * Stop for a debugger attach here, which is after the
446 * fork() etc. in smb_daemonize_init()
447 */
448 if (smbd.s_dbg_stop) {
449 smbd_report("pid %d stop for debugger attach", smbd.s_pid);
450 (void) kill(smbd.s_pid, SIGSTOP);
451 }
452 smbd_report("smbd starting, pid %d", smbd.s_pid);
453
454 for (i = 0; i < sizeof (dir)/sizeof (dir[0]); ++i) {
455 if ((mkdir(dir[i].name, dir[i].perm) < 0) &&
456 (errno != EEXIST)) {
457 smbd_report("mkdir %s: %s", dir[i].name,
458 strerror(errno));
459 return (-1);
460 }
461 }
462
463 /*
464 * This environment variable tells mech_krb5 to give us
465 * MS-compatible behavior.
466 */
467 (void) putenv("MS_INTEROP=1");
468
469 if ((rc = smb_ccache_init(SMB_VARRUN_DIR, SMB_CCACHE_FILE)) != 0) {
470 if (rc == -1)
471 smbd_report("mkdir %s: %s", SMB_VARRUN_DIR,
472 strerror(errno));
473 else
474 smbd_report("unable to set KRB5CCNAME");
475 return (-1);
476 }
477
478 #ifndef FKSMBD
479 /* Upgrade SMF settings, if necessary. */
480 smb_config_upgrade();
481 #endif
482
483 smb_codepage_init();
484
485 rc = smbd_cups_init();
486 if (smb_config_getbool(SMB_CI_PRINT_ENABLE))
487 smbd_report("print service %savailable", (rc == 0) ? "" : "un");
488
489 if (smbd_nicmon_start(SMBD_DEFAULT_INSTANCE_FMRI) != 0)
490 smbd_report("NIC monitor failed to start");
491
492 smbd_dyndns_init();
493 smb_ipc_init();
494
495 if (smb_config_getbool(SMB_CI_NETBIOS_ENABLE) == 0)
496 smbd_report("NetBIOS services disabled");
497 else if (smb_netbios_start() != 0)
498 smbd_report("NetBIOS services failed to start");
499 else
500 smbd_report("NetBIOS services started");
501
502 smbd.s_secmode = smb_config_get_secmode();
503 if ((rc = smb_domain_init(smbd.s_secmode)) != 0) {
504 if (rc == SMB_DOMAIN_NOMACHINE_SID) {
505 smbd_report(
506 "no machine SID: check idmap configuration");
507 return (-1);
508 }
509 }
510
511 if (smbd_dc_monitor_init() != 0)
512 smbd_report("DC monitor initialization failed %s",
513 strerror(errno));
514
515 if (smbd_pipesvc_start() != 0) {
516 smbd_report("pipesvc initialization failed");
517 return (-1);
518 }
519
520 if (smbd_authsvc_start() != 0) {
521 smbd_report("authsvc initialization failed");
522 return (-1);
523 }
524
525 smbd.s_door_srv = smbd_door_start();
526 if (smbd.s_door_srv < 0) {
527 smbd_report("door initialization failed %s", strerror(errno));
528 return (-1);
529 }
530
531 dyndns_update_zones();
532 smbd_localtime_init();
533 (void) smb_lgrp_start();
534 smb_pwd_init(B_TRUE);
535
536 if (smb_shr_start() != 0) {
537 smbd_report("share initialization failed: %s", strerror(errno));
538 return (-1);
539 }
540
541 smbd.s_door_lmshr = smbd_share_start();
542 if (smbd.s_door_lmshr < 0)
543 smbd_report("share initialization failed");
544
545 /* Open the driver, load the kernel config. */
546 if (smbd_kernel_bind() != 0) {
547 return (-1);
548 }
549
550 smbd_load_shares();
551 smbd_load_printers();
552 smbd_spool_start();
553
554 smbd.s_initialized = B_TRUE;
555 smbd_report("service initialized");
556
557 return (0);
558 }
559
560 /*
561 * Shutdown smbd and smbsrv kernel services.
562 *
563 * Called only by the main thread.
564 */
565 static void
smbd_service_fini(void)566 smbd_service_fini(void)
567 {
568
569 smbd.s_shutting_down = B_TRUE;
570 smbd_report("service shutting down");
571
572 smb_kmod_stop();
573 smb_logon_abort();
574 smb_lgrp_stop();
575 smbd_pipesvc_stop();
576 smbd_door_stop();
577 smbd_authsvc_stop();
578 smbd_spool_stop();
579 smbd_kernel_unbind();
580 smbd_share_stop();
581 smb_shr_unload();
582 smb_shr_stop();
583 dyndns_stop();
584 smbd_nicmon_stop();
585 smb_ccache_remove(SMB_CCACHE_PATH);
586 smb_pwd_fini();
587 smb_domain_fini();
588 mlsvc_fini();
589 smb_netbios_stop();
590 smbd_cups_fini();
591
592 smbd.s_initialized = B_FALSE;
593 smbd_report("service terminated");
594 closelog();
595 }
596
597 /*
598 * Called when SMF sends us a SIGHUP. Update the smbd configuration
599 * from SMF and check for changes that require service reconfiguration.
600 */
601 static void
smbd_refresh_handler()602 smbd_refresh_handler()
603 {
604 int new_debug;
605
606 if (smbd.s_shutting_down)
607 return;
608
609 smbd.s_refreshes++;
610
611 new_debug = smb_config_get_debug();
612 if (smbd.s_debug || new_debug)
613 smbd_report("debug=%d", new_debug);
614 smbd.s_debug = new_debug;
615
616 smbd_spool_stop();
617 smbd_dc_monitor_refresh();
618 smb_ccache_remove(SMB_CCACHE_PATH);
619
620 /*
621 * Clear the DNS zones for the existing interfaces
622 * before updating the NIC interface list.
623 */
624 dyndns_clear_zones();
625
626 if (smbd_nicmon_refresh() != 0)
627 smbd_report("NIC monitor refresh failed");
628
629 smb_netbios_name_reconfig();
630 smb_browser_reconfig();
631 dyndns_update_zones();
632
633 /* This reloads the in-kernel config. */
634 (void) smbd_kernel_bind();
635
636 /* On refresh load share properties only, not the shares themselves */
637 smb_shr_load_execinfo();
638
639 smbd_load_printers();
640 smbd_spool_start();
641 }
642
643 void
smbd_set_secmode(int secmode)644 smbd_set_secmode(int secmode)
645 {
646 switch (secmode) {
647 case SMB_SECMODE_WORKGRP:
648 case SMB_SECMODE_DOMAIN:
649 (void) smb_config_set_secmode(secmode);
650 smbd.s_secmode = secmode;
651 break;
652
653 default:
654 syslog(LOG_ERR, "invalid security mode: %d", secmode);
655 syslog(LOG_ERR, "entering maintenance mode");
656 (void) smb_smf_maintenance_mode();
657 }
658 }
659
660 /*
661 * The service is online if initialization is complete and shutdown
662 * has not begun.
663 */
664 boolean_t
smbd_online(void)665 smbd_online(void)
666 {
667 return (smbd.s_initialized && !smbd.s_shutting_down);
668 }
669
670 /*
671 * Wait until the service is online. Provided for threads that
672 * should wait until the service has been fully initialized before
673 * they start performing operations.
674 */
675 void
smbd_online_wait(const char * text)676 smbd_online_wait(const char *text)
677 {
678 while (!smbd_online())
679 (void) sleep(SMBD_ONLINE_WAIT_INTERVAL);
680
681 if (text != NULL) {
682 syslog(LOG_DEBUG, "%s: online", text);
683 (void) fprintf(stderr, "%s: online\n", text);
684 }
685 }
686
687 /*
688 * If the door has already been opened by another process (non-zero pid
689 * in target), we assume that another smbd is already running. If there
690 * is a race here, it will be caught later when smbsrv is opened because
691 * only one process is allowed to open the device at a time.
692 */
693 static int
smbd_already_running(void)694 smbd_already_running(void)
695 {
696 door_info_t info;
697 char *door_name;
698 int door;
699
700 door_name = getenv("SMBD_DOOR_NAME");
701 if (door_name == NULL)
702 door_name = SMBD_DOOR_NAME;
703
704 if ((door = open(door_name, O_RDONLY)) < 0)
705 return (0);
706
707 if (door_info(door, &info) < 0)
708 return (0);
709
710 if (info.di_target > 0) {
711 smbd_report("already running: pid %ld\n", info.di_target);
712 (void) close(door);
713 return (1);
714 }
715
716 (void) close(door);
717 return (0);
718 }
719
720 /*
721 * smbd_kernel_bind
722 *
723 * If smbsrv is already bound, reload the configuration and update smbsrv.
724 * Otherwise, open the smbsrv device and start the kernel service.
725 */
726 static int
smbd_kernel_bind(void)727 smbd_kernel_bind(void)
728 {
729 smb_kmod_cfg_t cfg;
730 int rc;
731
732 if (smbd.s_kbound) {
733 smb_load_kconfig(&cfg);
734 smbd_get_authconf(&cfg);
735 rc = smb_kmod_setcfg(&cfg);
736 if (rc < 0)
737 smbd_report("kernel configuration update failed: %s",
738 strerror(rc));
739 return (rc);
740 }
741
742 if (smb_kmod_isbound())
743 smbd_kernel_unbind();
744
745 if ((rc = smb_kmod_bind()) == 0) {
746 rc = smbd_kernel_start();
747 if (rc != 0)
748 smb_kmod_unbind();
749 else
750 smbd.s_kbound = B_TRUE;
751 } else {
752 smbd_report("kernel bind error: %s", strerror(rc));
753 }
754
755 return (rc);
756 }
757
758 static int
smbd_kernel_start(void)759 smbd_kernel_start(void)
760 {
761 smb_kmod_cfg_t cfg;
762 int rc;
763
764 smb_load_kconfig(&cfg);
765 smbd_get_authconf(&cfg);
766 rc = smb_kmod_setcfg(&cfg);
767 if (rc != 0) {
768 smbd_report("kernel config ioctl error: %s", strerror(rc));
769 return (rc);
770 }
771
772 rc = smb_kmod_setgmtoff(smbd_gmtoff());
773 if (rc != 0) {
774 smbd_report("kernel gmtoff ioctl error: %s", strerror(rc));
775 return (rc);
776 }
777
778 rc = smb_kmod_start(smbd.s_door_opipe, smbd.s_door_lmshr,
779 smbd.s_door_srv);
780
781 if (rc != 0) {
782 smbd_report("kernel start ioctl error: %s", strerror(rc));
783 return (rc);
784 }
785
786 return (0);
787 }
788
789 /*
790 * smbd_kernel_unbind
791 */
792 static void
smbd_kernel_unbind(void)793 smbd_kernel_unbind(void)
794 {
795 smb_kmod_unbind();
796 smbd.s_kbound = B_FALSE;
797 }
798
799 /*
800 * Create the Dynamic DNS publisher thread.
801 */
802 static void
smbd_dyndns_init(void)803 smbd_dyndns_init(void)
804 {
805 pthread_t tid;
806 pthread_attr_t attr;
807 int rc;
808
809 dyndns_start();
810
811 (void) pthread_attr_init(&attr);
812 (void) pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
813 rc = pthread_create(&tid, &attr, dyndns_publisher, NULL);
814 (void) pthread_attr_destroy(&attr);
815
816 if (rc != 0)
817 smbd_report("unable to start dyndns publisher: %s",
818 strerror(errno));
819 }
820
821 /*
822 * Launches a thread to populate the share cache by share information
823 * stored in sharemgr
824 */
825 static void
smbd_load_shares(void)826 smbd_load_shares(void)
827 {
828 pthread_t tid;
829 pthread_attr_t attr;
830 int rc;
831
832 (void) pthread_attr_init(&attr);
833 (void) pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
834 rc = pthread_create(&tid, &attr, smbd_share_loader, NULL);
835 (void) pthread_attr_destroy(&attr);
836
837 if (rc != 0)
838 smbd_report("unable to load disk shares: %s", strerror(errno));
839 }
840
841 /*
842 * This wrapper function is used to avoid casting smb_shr_load() in
843 * pthread_create() above. It is called very infrequently.
844 */
845 static void *
smbd_share_loader(void * args)846 smbd_share_loader(void *args)
847 {
848 (void) smb_shr_load(args);
849 return (NULL);
850 }
851
852 /*
853 * Initialization of the localtime thread.
854 * Returns 0 on success, an error number if thread creation fails.
855 */
856
857 static void
smbd_localtime_init(void)858 smbd_localtime_init(void)
859 {
860 pthread_attr_t attr;
861 int rc;
862
863 (void) pthread_attr_init(&attr);
864 (void) pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
865 rc = pthread_create(&smbd.s_localtime_tid, &attr,
866 smbd_localtime_monitor, NULL);
867 (void) pthread_attr_destroy(&attr);
868
869 if (rc != 0)
870 smbd_report("unable to monitor localtime: %s", strerror(errno));
871 }
872
873 /*
874 * Send local gmtoff to the kernel module one time at startup and each
875 * time it changes (up to twice a year).
876 * Local gmtoff is checked once every 15 minutes since some timezones
877 * are aligned on half and quarter hour boundaries.
878 */
879 /*ARGSUSED*/
880 static void *
smbd_localtime_monitor(void * arg)881 smbd_localtime_monitor(void *arg)
882 {
883 struct tm local_tm;
884 time_t secs;
885 int32_t gmtoff, last_gmtoff = -1;
886 int timeout;
887 int error;
888
889 smbd_online_wait("smbd_localtime_monitor");
890
891 for (;;) {
892 gmtoff = smbd_gmtoff();
893
894 if ((last_gmtoff != gmtoff) && smbd.s_kbound) {
895 error = smb_kmod_setgmtoff(gmtoff);
896 if (error != 0)
897 smbd_report("localtime set failed: %s",
898 strerror(error));
899 }
900
901 /*
902 * Align the next iteration on a fifteen minute boundary.
903 */
904 secs = time(0);
905 (void) localtime_r(&secs, &local_tm);
906 timeout = ((15 - (local_tm.tm_min % 15)) * SECSPERMIN);
907 (void) sleep(timeout);
908
909 last_gmtoff = gmtoff;
910 }
911
912 /*NOTREACHED*/
913 return (NULL);
914 }
915
916 /*
917 * smbd_gmtoff
918 *
919 * Determine offset from GMT. If daylight saving time use altzone,
920 * otherwise use timezone.
921 */
922 static int32_t
smbd_gmtoff(void)923 smbd_gmtoff(void)
924 {
925 time_t clock_val;
926 struct tm *atm;
927 int32_t gmtoff;
928
929 (void) time(&clock_val);
930 atm = localtime(&clock_val);
931
932 gmtoff = (atm->tm_isdst) ? altzone : timezone;
933
934 return (gmtoff);
935 }
936
937 /*
938 * Set up configuration options and parse the command line.
939 * This function will determine if we will run as a daemon
940 * or in the foreground.
941 *
942 * Failure to find a uid or gid results in using the default (0).
943 */
944 static int
smbd_setup_options(int argc,char * argv[])945 smbd_setup_options(int argc, char *argv[])
946 {
947 struct passwd *pwd;
948 struct group *grp;
949 int c;
950
951 if ((pwd = getpwnam("root")) != NULL)
952 smbd.s_uid = pwd->pw_uid;
953
954 if ((grp = getgrnam("sys")) != NULL)
955 smbd.s_gid = grp->gr_gid;
956
957 smbd.s_debug = smb_config_get_debug();
958 smbd.s_fg = smb_config_get_fg_flag();
959
960 while ((c = getopt(argc, argv, ":dfs")) != -1) {
961 switch (c) {
962 case 'd':
963 smbd.s_debug++;
964 break;
965 case 'f':
966 smbd.s_fg = 1;
967 break;
968 case 's':
969 smbd.s_dbg_stop = 1;
970 break;
971 case ':':
972 case '?':
973 default:
974 smbd_usage(stderr);
975 return (-1);
976 }
977 }
978
979 return (0);
980 }
981
982 static void
smbd_usage(FILE * fp)983 smbd_usage(FILE *fp)
984 {
985 static char *help[] = {
986 "-d enable debug messages"
987 "-f run program in foreground"
988 };
989
990 int i;
991
992 (void) fprintf(fp, "Usage: %s [-f]\n", smbd.s_pname);
993
994 for (i = 0; i < sizeof (help)/sizeof (help[0]); ++i)
995 (void) fprintf(fp, " %s\n", help[i]);
996 }
997
998 void
smbd_report(const char * fmt,...)999 smbd_report(const char *fmt, ...)
1000 {
1001 char buf[128];
1002 va_list ap;
1003
1004 if (fmt == NULL)
1005 return;
1006
1007 va_start(ap, fmt);
1008 (void) vsnprintf(buf, 128, fmt, ap);
1009 va_end(ap);
1010
1011 (void) fprintf(stderr, "smbd: %s\n", buf);
1012 }
1013
1014 /*
1015 * Once we're out of memory, we're not likely to recover
1016 * without a restart. Let SMF restart this service.
1017 */
1018 void
smbd_nomem(void)1019 smbd_nomem(void)
1020 {
1021 smbd_report(strerror(ENOMEM));
1022 if (smbd.s_debug)
1023 abort();
1024 exit(1);
1025 }
1026
1027 /*
1028 * Enable libumem debugging by default on DEBUG builds.
1029 */
1030 #ifdef DEBUG
1031 const char *
_umem_debug_init(void)1032 _umem_debug_init(void)
1033 {
1034 return ("default,verbose"); /* $UMEM_DEBUG setting */
1035 }
1036
1037 const char *
_umem_logging_init(void)1038 _umem_logging_init(void)
1039 {
1040 return ("fail,contents"); /* $UMEM_LOGGING setting */
1041 }
1042 #endif
1043