xref: /titanic_51/usr/src/uts/common/fs/smbsrv/smb_server.c (revision 4045d94132614e1de2073685a6cdd4fbd86bec33)
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 2008 Sun Microsystems, Inc.  All rights reserved.
23  * Use is subject to license terms.
24  */
25 
26 #pragma ident	"%Z%%M%	%I%	%E% SMI"
27 
28 /*
29  * General Structures Layout
30  * -------------------------
31  *
32  * This is a simplified diagram showing the relationship between most of the
33  * main structures.
34  *
35  * +-------------------+
36  * |     SMB_SERVER    |
37  * +-------------------+
38  *          |
39  *          |
40  *          v
41  * +-------------------+       +-------------------+      +-------------------+
42  * |     SESSION       |<----->|     SESSION       |......|      SESSION      |
43  * +-------------------+       +-------------------+      +-------------------+
44  *          |
45  *          |
46  *          v
47  * +-------------------+       +-------------------+      +-------------------+
48  * |       USER        |<----->|       USER        |......|       USER        |
49  * +-------------------+       +-------------------+      +-------------------+
50  *          |
51  *          |
52  *          v
53  * +-------------------+       +-------------------+      +-------------------+
54  * |       TREE        |<----->|       TREE        |......|       TREE        |
55  * +-------------------+       +-------------------+      +-------------------+
56  *      |         |
57  *      |         |
58  *      |         v
59  *      |     +-------+       +-------+      +-------+
60  *      |     | OFILE |<----->| OFILE |......| OFILE |
61  *      |     +-------+       +-------+      +-------+
62  *      |
63  *      |
64  *      v
65  *  +-------+       +------+      +------+
66  *  | ODIR  |<----->| ODIR |......| ODIR |
67  *  +-------+       +------+      +------+
68  *
69  *
70  * Module Interface Overview
71  * -------------------------
72  *
73  *
74  *	    +===================================+
75  *	    |		 smbd daemon		|
76  *	    +===================================+
77  *	      |		     |		      ^
78  *	      |		     |		      |
79  * User	      |		     |		      |
80  * -----------|--------------|----------------|--------------------------------
81  * Kernel     |		     |		      |
82  *            |		     |		      |
83  *	      |		     |		      |
84  *  +=========|==============|================|=================+
85  *  |	      v		     v		      |			|
86  *  | +-----------+ +--------------------+ +------------------+ |
87  *  | |     IO    | | Kernel Door Server | | User Door Servers|	|
88  *  | | Interface | |     Interface      | |   Interface      | |
89  *  | +-----------+ +--------------------+ +------------------+ |
90  *  |		|	     |		      ^		^	|
91  *  |		v	     v		      |		|	|    +=========+
92  *  |	     +-----------------------------------+	|	|    |	       |
93  *  |	     + SMB Server Management (this file) |<------------------|	 ZFS   |
94  *  |	     +-----------------------------------+	|	|    |	       |
95  *  |							|	|    |  Module |
96  *  |	     +-----------------------------------+	|	|    |	       |
97  *  |	     +     SMB Server Internal Layers    |------+	|    +=========+
98  *  |	     +-----------------------------------+		|
99  *  |								|
100  *  |								|
101  *  +===========================================================+
102  *
103  *
104  * Server State Machine
105  * --------------------
106  *                                  |
107  *                                  | T0
108  *                                  |
109  *                                  v
110  *                    +-----------------------------+
111  *		      |   SMB_SERVER_STATE_CREATED  |
112  *		      +-----------------------------+
113  *				    |
114  *				    | T1
115  *				    |
116  *				    v
117  *		      +-----------------------------+
118  *		      | SMB_SERVER_STATE_CONFIGURED |
119  *		      +-----------------------------+
120  *				    |
121  *				    | T2
122  *				    |
123  *				    v
124  *		      +-----------------------------+
125  *		      |  SMB_SERVER_STATE_RUNNING   |
126  *		      +-----------------------------+
127  *				    |
128  *				    | T3
129  *				    |
130  *				    v
131  *		      +-----------------------------+
132  *		      |  SMB_SERVER_STATE_DELETING  |
133  *                    +-----------------------------+
134  *				    |
135  *				    |
136  *				    |
137  *				    v
138  *
139  * States
140  * ------
141  *
142  * SMB_SERVER_STATE_CREATED
143  *
144  *    This is the state of the server just after creation.
145  *
146  * SMB_SERVER_STATE_CONFIGURED
147  *
148  *    The server has been configured.
149  *
150  * SMB_SERVER_STATE_RUNNING
151  *
152  *    The server has been started. While in this state the threads listening on
153  *    the sockets car be started. The smbd daemon does so through an Ioctl:
154  *
155  *	smb_drv_ioctl(SMB_IOC_NBT_LISTEN) --> smb_server_nbt_listen()
156  *	smb_drv_ioctl(SMB_IOC_TCP_LISTEN) --> smb_server_nbt_listen()
157  *
158  *    When a client establishes a connection the thread listening leaves
159  *    temporarily the kernel. While in user space it creates a thread for the
160  *    new session. It then returns to kernel with the result of the thread
161  *    creation. If the creation failed the new session context is destroyed
162  *    before returning listening.
163  *
164  *    The new created thread enters the kernel though an Ioctl:
165  *
166  *	smb_drv_ioctl(SMB_IOC_NBT_RECEIVE) --> smb_server_nbt_receive()
167  *	smb_drv_ioctl(SMB_IOC_TCP_RECEIVE) --> smb_server_tcp_receive()
168  *
169  * SMB_SERVER_STATE_STOPPING
170  *
171  *    The threads listening on the NBT and TCP sockets are being terminated.
172  *
173  *
174  * Transitions
175  * -----------
176  *
177  * Transition T0
178  *
179  *    The daemon smbd triggers its creation by opening the smbsrv device. If
180  *    the zone where the daemon lives doesn't have an smb server yet it is
181  *    created.
182  *
183  *		smb_drv_open() --> smb_server_create()
184  *
185  * Transition T1
186  *
187  *    This transition occurs in smb_server_configure(). It is triggered by the
188  *    daemon through an Ioctl.
189  *
190  *	smb_drv_ioctl(SMB_IOC_CONFIG) --> smb_server_configure()
191  *
192  * Transition T2
193  *
194  *    This transition occurs in smb_server_start(). It is triggered by the
195  *    daemon through an Ioctl.
196  *
197  *	smb_drv_ioctl(SMB_IOC_START) --> smb_server_start()
198  *
199  * Transition T3
200  *
201  *    This transition occurs in smb_server_delete(). It is triggered by the
202  *    daemon when closing the smbsrv device
203  *
204  *		smb_drv_close() --> smb_server_delete()
205  *
206  * Comments
207  * --------
208  *
209  * This files assumes that there will one SMB server per zone. For now the
210  * smb server works only in global zone. There's nothing in this file preventing
211  * an smb server from being created in a non global zone. That limitation is
212  * enforced in user space.
213  */
214 
215 #include <sys/strsubr.h>
216 #include <sys/cmn_err.h>
217 #include <sys/priv.h>
218 #include <sys/socketvar.h>
219 #include <sys/zone.h>
220 #include <smbsrv/smb_kproto.h>
221 #include <smbsrv/netbios.h>
222 #include <smbsrv/smb_incl.h>
223 #include <smbsrv/cifs.h>
224 #include <smbsrv/smb_fsops.h>
225 #include <smbsrv/lmshare.h>
226 #include <smbsrv/smb_door_svc.h>
227 #include <smbsrv/smb_kstat.h>
228 
229 extern void smb_dispatch_kstat_init(void);
230 extern void smb_dispatch_kstat_fini(void);
231 extern void smb_reply_notify_change_request(smb_request_t *);
232 
233 static int smb_server_kstat_init(smb_server_t *);
234 static void smb_server_kstat_fini(smb_server_t *);
235 static int smb_server_kstat_update_info(kstat_t *, int);
236 static void smb_server_timers(smb_thread_t *, void *);
237 static int smb_server_listen(smb_server_t *, smb_listener_daemon_t *,
238     in_port_t, int);
239 static int smb_server_lookup(smb_server_t **);
240 static void smb_server_release(smb_server_t *);
241 static int smb_server_ulist_geti(smb_session_list_t *, int, smb_dr_user_ctx_t *,
242     int);
243 static void smb_server_store_cfg(smb_server_t *, smb_kmod_cfg_t *);
244 static void smb_server_stop(smb_server_t *);
245 static int smb_server_fsop_start(smb_server_t *);
246 static void smb_server_fsop_stop(smb_server_t *);
247 
248 static smb_llist_t	smb_servers;
249 
250 /*
251  * *****************************************************************************
252  * **************** Functions called from the device interface *****************
253  * *****************************************************************************
254  *
255  * These functions determine the relevant smb server to which the call apply.
256  */
257 
258 /*
259  * smb_server_svc_init
260  *
261  * This function must called from smb_drv_attach().
262  */
263 int
264 smb_server_svc_init(void)
265 {
266 	int	rc = 0;
267 
268 	while (rc == 0) {
269 		if (rc = smb_vop_init())
270 			continue;
271 		if (rc = smb_node_init())
272 			continue;
273 		if (rc = smb_fem_init())
274 			continue;
275 		if (rc = smb_notify_init())
276 			continue;
277 		if (rc = smb_net_init())
278 			continue;
279 		if (rc = smb_kdoor_srv_start())
280 			continue;
281 		smb_llist_constructor(&smb_servers, sizeof (smb_server_t),
282 		    offsetof(smb_server_t, sv_lnd));
283 		return (0);
284 	}
285 	smb_net_fini();
286 	smb_notify_fini();
287 	smb_fem_fini();
288 	smb_node_fini();
289 	smb_vop_fini();
290 	return (rc);
291 }
292 
293 /*
294  * smb_server_svc_fini
295  *
296  * This function must called from smb_drv_detach(). It will fail if servers
297  * still exist.
298  */
299 int
300 smb_server_svc_fini(void)
301 {
302 	int	rc = EBUSY;
303 
304 	if (smb_llist_get_count(&smb_servers) == 0) {
305 		smb_kdoor_srv_stop();
306 		smb_net_fini();
307 		smb_notify_fini();
308 		smb_fem_fini();
309 		smb_node_fini();
310 		smb_vop_fini();
311 		smb_llist_destructor(&smb_servers);
312 		rc = 0;
313 	}
314 	return (rc);
315 }
316 
317 /*
318  * smb_server_create
319  *
320  * This function will fail if there's already a server associated with the
321  * caller's zone.
322  */
323 int
324 smb_server_create(void)
325 {
326 	zoneid_t	zid;
327 	smb_server_t	*sv;
328 
329 	zid = getzoneid();
330 
331 	smb_llist_enter(&smb_servers, RW_WRITER);
332 	sv = smb_llist_head(&smb_servers);
333 	while (sv) {
334 		ASSERT(sv->sv_magic == SMB_SERVER_MAGIC);
335 		if (sv->sv_zid == zid) {
336 			smb_llist_exit(&smb_servers);
337 			return (EEXIST);
338 		}
339 		sv = smb_llist_next(&smb_servers, sv);
340 	}
341 
342 	sv = kmem_zalloc(sizeof (smb_server_t), KM_NOSLEEP);
343 	if (sv == NULL) {
344 		smb_llist_exit(&smb_servers);
345 		return (ENOMEM);
346 	}
347 
348 	smb_llist_constructor(&sv->sv_vfs_list, sizeof (smb_vfs_t),
349 	    offsetof(smb_vfs_t, sv_lnd));
350 
351 	smb_session_list_constructor(&sv->sv_nbt_daemon.ld_session_list);
352 	smb_session_list_constructor(&sv->sv_tcp_daemon.ld_session_list);
353 
354 	sv->si_cache_vfs = kmem_cache_create("smb_vfs_cache",
355 	    sizeof (smb_vfs_t), 8, NULL, NULL, NULL, NULL, NULL, 0);
356 	sv->si_cache_request = kmem_cache_create("smb_request_cache",
357 	    sizeof (smb_request_t), 8, NULL, NULL, NULL, NULL, NULL, 0);
358 	sv->si_cache_session = kmem_cache_create("smb_session_cache",
359 	    sizeof (smb_session_t), 8, NULL, NULL, NULL, NULL, NULL, 0);
360 	sv->si_cache_user = kmem_cache_create("smb_user_cache",
361 	    sizeof (smb_user_t), 8, NULL, NULL, NULL, NULL, NULL, 0);
362 	sv->si_cache_tree = kmem_cache_create("smb_tree_cache",
363 	    sizeof (smb_tree_t), 8, NULL, NULL, NULL, NULL, NULL, 0);
364 	sv->si_cache_ofile = kmem_cache_create("smb_ofile_cache",
365 	    sizeof (smb_ofile_t), 8, NULL, NULL, NULL, NULL, NULL, 0);
366 	sv->si_cache_odir = kmem_cache_create("smb_odir_cache",
367 	    sizeof (smb_odir_t), 8, NULL, NULL, NULL, NULL, NULL, 0);
368 	sv->si_cache_node = kmem_cache_create("smb_node_cache",
369 	    sizeof (smb_node_t), 8, NULL, NULL, NULL, NULL, NULL, 0);
370 
371 	smb_thread_init(&sv->si_thread_timers,
372 	    "smb_timers", smb_server_timers, sv,
373 	    NULL, NULL);
374 
375 	sv->sv_pid = curproc->p_pid;
376 
377 	smb_winpipe_init();
378 	(void) smb_server_kstat_init(sv);
379 
380 	mutex_init(&sv->sv_mutex, NULL, MUTEX_DEFAULT, NULL);
381 	cv_init(&sv->sv_cv, NULL, CV_DEFAULT, NULL);
382 	sv->sv_state = SMB_SERVER_STATE_CREATED;
383 	sv->sv_magic = SMB_SERVER_MAGIC;
384 	sv->sv_zid = zid;
385 
386 	smb_llist_insert_tail(&smb_servers, sv);
387 	smb_llist_exit(&smb_servers);
388 	return (0);
389 }
390 
391 /*
392  * smb_server_delete
393  *
394  * This function will delete the server passed in. It will make sure that all
395  * activity associated that server has ceased before destroying it.
396  */
397 int
398 smb_server_delete(void)
399 {
400 	smb_server_t	*sv;
401 	int		rc;
402 
403 	rc = smb_server_lookup(&sv);
404 	if (rc != 0)
405 		return (rc);
406 
407 	mutex_enter(&sv->sv_mutex);
408 	switch (sv->sv_state) {
409 	case SMB_SERVER_STATE_RUNNING:
410 	{
411 		boolean_t	nbt = B_FALSE;
412 		boolean_t	tcp = B_FALSE;
413 
414 		if (sv->sv_nbt_daemon.ld_kth) {
415 			tsignal(sv->sv_nbt_daemon.ld_kth, SIGINT);
416 			nbt = B_TRUE;
417 		}
418 		if (sv->sv_tcp_daemon.ld_kth) {
419 			tsignal(sv->sv_tcp_daemon.ld_kth, SIGINT);
420 			tcp = B_TRUE;
421 		}
422 		sv->sv_state = SMB_SERVER_STATE_DELETING;
423 		mutex_exit(&sv->sv_mutex);
424 		if (nbt)
425 			thread_join(sv->sv_nbt_daemon.ld_ktdid);
426 		if (tcp)
427 			thread_join(sv->sv_tcp_daemon.ld_ktdid);
428 		mutex_enter(&sv->sv_mutex);
429 		break;
430 	}
431 	case SMB_SERVER_STATE_CONFIGURED:
432 	case SMB_SERVER_STATE_CREATED:
433 		sv->sv_state = SMB_SERVER_STATE_DELETING;
434 		break;
435 	default:
436 		ASSERT(sv->sv_state == SMB_SERVER_STATE_DELETING);
437 		mutex_exit(&sv->sv_mutex);
438 		smb_server_release(sv);
439 		return (ENOTTY);
440 	}
441 
442 	ASSERT(sv->sv_state == SMB_SERVER_STATE_DELETING);
443 
444 	sv->sv_refcnt--;
445 	while (sv->sv_refcnt)
446 		cv_wait(&sv->sv_cv, &sv->sv_mutex);
447 
448 	mutex_exit(&sv->sv_mutex);
449 
450 	smb_llist_enter(&smb_servers, RW_WRITER);
451 	smb_llist_remove(&smb_servers, sv);
452 	smb_llist_exit(&smb_servers);
453 
454 	smb_server_stop(sv);
455 	rw_destroy(&sv->sv_cfg_lock);
456 	smb_winpipe_fini();
457 	smb_server_kstat_fini(sv);
458 	smb_llist_destructor(&sv->sv_vfs_list);
459 	kmem_cache_destroy(sv->si_cache_vfs);
460 	kmem_cache_destroy(sv->si_cache_request);
461 	kmem_cache_destroy(sv->si_cache_session);
462 	kmem_cache_destroy(sv->si_cache_user);
463 	kmem_cache_destroy(sv->si_cache_tree);
464 	kmem_cache_destroy(sv->si_cache_ofile);
465 	kmem_cache_destroy(sv->si_cache_odir);
466 	kmem_cache_destroy(sv->si_cache_node);
467 
468 	taskq_destroy(sv->sv_thread_pool);
469 	smb_thread_destroy(&sv->si_thread_timers);
470 	mutex_destroy(&sv->sv_mutex);
471 	cv_destroy(&sv->sv_cv);
472 	sv->sv_magic = 0;
473 	kmem_free(sv, sizeof (smb_server_t));
474 
475 	return (0);
476 }
477 
478 /*
479  * smb_server_configure
480  */
481 int
482 smb_server_configure(smb_kmod_cfg_t *cfg)
483 {
484 	int		rc = 0;
485 	smb_server_t	*sv;
486 
487 	rc = smb_server_lookup(&sv);
488 	if (rc)
489 		return (rc);
490 
491 	mutex_enter(&sv->sv_mutex);
492 	switch (sv->sv_state) {
493 	case SMB_SERVER_STATE_CREATED:
494 		smb_server_store_cfg(sv, cfg);
495 		sv->sv_state = SMB_SERVER_STATE_CONFIGURED;
496 		break;
497 
498 	case SMB_SERVER_STATE_CONFIGURED:
499 		smb_server_store_cfg(sv, cfg);
500 		break;
501 
502 	case SMB_SERVER_STATE_RUNNING:
503 		rw_enter(&sv->sv_cfg_lock, RW_WRITER);
504 		smb_server_store_cfg(sv, cfg);
505 		rw_exit(&sv->sv_cfg_lock);
506 		break;
507 
508 	default:
509 		ASSERT(sv->sv_state == SMB_SERVER_STATE_DELETING);
510 		rc = EFAULT;
511 		break;
512 	}
513 	mutex_exit(&sv->sv_mutex);
514 
515 	smb_server_release(sv);
516 
517 	return (rc);
518 }
519 
520 /*
521  * smb_server_start
522  */
523 int
524 smb_server_start(struct smb_io_start *io_start)
525 {
526 	int		rc = 0;
527 	smb_server_t	*sv;
528 
529 	rc = smb_server_lookup(&sv);
530 	if (rc)
531 		return (rc);
532 
533 	mutex_enter(&sv->sv_mutex);
534 	switch (sv->sv_state) {
535 	case SMB_SERVER_STATE_CONFIGURED:
536 
537 		sv->sv_thread_pool = taskq_create("smb_workers",
538 		    sv->sv_cfg.skc_maxworkers, SMB_WORKER_PRIORITY,
539 		    sv->sv_cfg.skc_maxworkers, INT_MAX,
540 		    TASKQ_DYNAMIC|TASKQ_PREPOPULATE);
541 
542 		sv->sv_session = smb_session_create(NULL, 0, sv);
543 		if (sv->sv_session == NULL) {
544 			rc = ENOMEM;
545 			break;
546 		}
547 
548 		if (rc = smb_server_fsop_start(sv))
549 			break;
550 		ASSERT(sv->sv_lmshrd == NULL);
551 		sv->sv_lmshrd = lmshrd_kclient_init(io_start->lmshrd);
552 		if (sv->sv_lmshrd == NULL)
553 			break;
554 		if (rc = smb_kdoor_clnt_start(io_start->udoor))
555 			break;
556 		if (rc = smb_kdoor_srv_set_dwncall())
557 			break;
558 		if (rc = smb_thread_start(&sv->si_thread_timers))
559 			break;
560 		/*
561 		 * XXX We give up the NET_MAC_AWARE privilege because it keeps
562 		 * us from re-opening the connection when there are leftover TCP
563 		 * connections in TCPS_TIME_WAIT state.  There seem to be some
564 		 * security ramifications around reestablishing a connection
565 		 * while possessing the NET_MAC_AWARE privilege.
566 		 *
567 		 * This approach may cause problems when we try to support
568 		 * zones.  An alternative would be to retry the connection setup
569 		 * for a fixed period of time until the stale connections clear
570 		 * up but that implies we would be offline for a couple minutes
571 		 * every time the service is restarted with active connections.
572 		 */
573 		rc = setpflags(NET_MAC_AWARE, 0, CRED());
574 		if (rc) {
575 			cmn_err(CE_WARN,
576 			    "Cannot remove NET_MAC_AWARE privilege");
577 			break;
578 		}
579 		if (rc = smb_winpipe_open(io_start->winpipe)) {
580 			cmn_err(CE_WARN, "Cannot open winpipe door");
581 			break;
582 		}
583 		sv->sv_state = SMB_SERVER_STATE_RUNNING;
584 		mutex_exit(&sv->sv_mutex);
585 		smb_server_release(sv);
586 		return (0);
587 	default:
588 		ASSERT((sv->sv_state == SMB_SERVER_STATE_CREATED) ||
589 		    (sv->sv_state == SMB_SERVER_STATE_RUNNING) ||
590 		    (sv->sv_state == SMB_SERVER_STATE_DELETING));
591 		mutex_exit(&sv->sv_mutex);
592 		smb_server_release(sv);
593 		return (ENOTTY);
594 	}
595 
596 	smb_server_stop(sv);
597 	mutex_exit(&sv->sv_mutex);
598 	smb_server_release(sv);
599 	return (rc);
600 }
601 
602 /*
603  * smb_server_nbt_listen: SMB-over-NetBIOS service
604  *
605  * Traditional SMB service over NetBIOS (port 139), which requires
606  * that a NetBIOS session be established.
607  */
608 int
609 smb_server_nbt_listen(int error)
610 {
611 	smb_server_t	*sv;
612 	int		rc;
613 
614 	rc = smb_server_lookup(&sv);
615 	if (rc)
616 		return (rc);
617 
618 	mutex_enter(&sv->sv_mutex);
619 	switch (sv->sv_state) {
620 	case SMB_SERVER_STATE_RUNNING:
621 		if ((sv->sv_nbt_daemon.ld_kth != NULL) &&
622 		    (sv->sv_nbt_daemon.ld_kth != curthread)) {
623 			mutex_exit(&sv->sv_mutex);
624 			return (EACCES);
625 		} else {
626 			sv->sv_nbt_daemon.ld_kth = curthread;
627 			sv->sv_nbt_daemon.ld_ktdid = curthread->t_did;
628 		}
629 		break;
630 	default:
631 		ASSERT((sv->sv_state == SMB_SERVER_STATE_CREATED) ||
632 		    (sv->sv_state == SMB_SERVER_STATE_CONFIGURED) ||
633 		    (sv->sv_state == SMB_SERVER_STATE_DELETING));
634 		mutex_exit(&sv->sv_mutex);
635 		smb_server_release(sv);
636 		return (EFAULT);
637 	}
638 	mutex_exit(&sv->sv_mutex);
639 
640 	rc = smb_server_listen(sv, &sv->sv_nbt_daemon, SSN_SRVC_TCP_PORT,
641 	    error);
642 
643 	if (rc) {
644 		mutex_enter(&sv->sv_mutex);
645 		sv->sv_nbt_daemon.ld_kth = NULL;
646 		mutex_exit(&sv->sv_mutex);
647 	}
648 
649 	smb_server_release(sv);
650 
651 	return (rc);
652 }
653 
654 int
655 smb_server_tcp_listen(int error)
656 {
657 	smb_server_t	*sv;
658 	int		rc;
659 
660 	rc = smb_server_lookup(&sv);
661 	if (rc)
662 		return (rc);
663 
664 	mutex_enter(&sv->sv_mutex);
665 	switch (sv->sv_state) {
666 	case SMB_SERVER_STATE_RUNNING:
667 		if ((sv->sv_tcp_daemon.ld_kth) &&
668 		    (sv->sv_tcp_daemon.ld_kth != curthread)) {
669 			mutex_exit(&sv->sv_mutex);
670 			return (EACCES);
671 		} else {
672 			sv->sv_tcp_daemon.ld_kth = curthread;
673 			sv->sv_tcp_daemon.ld_ktdid = curthread->t_did;
674 		}
675 		break;
676 	default:
677 		ASSERT((sv->sv_state == SMB_SERVER_STATE_CREATED) ||
678 		    (sv->sv_state == SMB_SERVER_STATE_CONFIGURED) ||
679 		    (sv->sv_state == SMB_SERVER_STATE_DELETING));
680 		mutex_exit(&sv->sv_mutex);
681 		return (EFAULT);
682 	}
683 	mutex_exit(&sv->sv_mutex);
684 
685 	rc = smb_server_listen(sv, &sv->sv_tcp_daemon, SMB_SRVC_TCP_PORT,
686 	    error);
687 
688 	if (rc) {
689 		mutex_enter(&sv->sv_mutex);
690 		sv->sv_tcp_daemon.ld_kth = NULL;
691 		mutex_exit(&sv->sv_mutex);
692 	}
693 
694 	smb_server_release(sv);
695 
696 	return (rc);
697 }
698 
699 /*
700  * smb_server_nbt_receive
701  */
702 int
703 smb_server_nbt_receive(void)
704 {
705 	int		rc;
706 	smb_server_t	*sv;
707 
708 	rc = smb_server_lookup(&sv);
709 	if (rc)
710 		return (rc);
711 
712 	rc = smb_session_daemon(&sv->sv_nbt_daemon.ld_session_list);
713 
714 	smb_server_release(sv);
715 
716 	return (rc);
717 }
718 
719 /*
720  * smb_server_tcp_receive
721  */
722 int
723 smb_server_tcp_receive(void)
724 {
725 	int		rc;
726 	smb_server_t	*sv;
727 
728 	rc = smb_server_lookup(&sv);
729 	if (rc)
730 		return (rc);
731 
732 	rc = smb_session_daemon(&sv->sv_tcp_daemon.ld_session_list);
733 
734 	smb_server_release(sv);
735 
736 	return (rc);
737 }
738 
739 int
740 smb_server_set_gmtoff(uint32_t goff)
741 {
742 	int		rc;
743 	smb_server_t	*sv;
744 
745 
746 	rc = smb_server_lookup(&sv);
747 	if (rc)
748 		return (rc);
749 
750 	sv->si_gmtoff = goff;
751 
752 	smb_server_release(sv);
753 
754 	return (rc);
755 }
756 
757 /*
758  * *****************************************************************************
759  * ****************** Functions called from the door interface *****************
760  * *****************************************************************************
761  *
762  * These functions determine the relevant smb server to which the call apply.
763  */
764 
765 uint32_t
766 smb_server_get_user_count(void)
767 {
768 	smb_server_t	*sv;
769 	uint32_t	counter = 0;
770 
771 	if (smb_server_lookup(&sv))
772 		return (0);
773 
774 	counter = (uint32_t)sv->sv_open_users;
775 
776 	smb_server_release(sv);
777 
778 	return (counter);
779 }
780 
781 uint32_t
782 smb_server_get_session_count(void)
783 {
784 	smb_server_t	*sv;
785 	uint32_t	counter = 0;
786 
787 	if (smb_server_lookup(&sv))
788 		return (0);
789 
790 	rw_enter(&sv->sv_nbt_daemon.ld_session_list.se_lock, RW_READER);
791 	counter = sv->sv_nbt_daemon.ld_session_list.se_act.count;
792 	rw_exit(&sv->sv_nbt_daemon.ld_session_list.se_lock);
793 	rw_enter(&sv->sv_tcp_daemon.ld_session_list.se_lock, RW_READER);
794 	counter += sv->sv_tcp_daemon.ld_session_list.se_act.count;
795 	rw_exit(&sv->sv_tcp_daemon.ld_session_list.se_lock);
796 
797 	smb_server_release(sv);
798 
799 	return (counter);
800 }
801 
802 /*
803  * smb_session_disconnect_share
804  *
805  * Disconnects the specified share. This function should be called after the
806  * share passed in has been made unavailable by the "share manager".
807  */
808 void
809 smb_server_disconnect_share(char *sharename)
810 {
811 	smb_server_t	*sv;
812 
813 	if (smb_server_lookup(&sv))
814 		return;
815 
816 	smb_session_disconnect_share(&sv->sv_nbt_daemon.ld_session_list,
817 	    sharename);
818 	smb_session_disconnect_share(&sv->sv_tcp_daemon.ld_session_list,
819 	    sharename);
820 
821 	smb_server_release(sv);
822 }
823 
824 void
825 smb_server_disconnect_volume(fs_desc_t *fsd)
826 {
827 	smb_server_t	*sv;
828 
829 	if (smb_server_lookup(&sv))
830 		return;
831 
832 	smb_session_disconnect_volume(&sv->sv_nbt_daemon.ld_session_list, fsd);
833 	smb_session_disconnect_volume(&sv->sv_tcp_daemon.ld_session_list, fsd);
834 
835 	smb_server_release(sv);
836 }
837 
838 int
839 smb_server_dr_ulist_get(int offset, smb_dr_ulist_t *dr_ulist, int max_cnt)
840 {
841 	smb_server_t	*sv;
842 
843 	if (!dr_ulist)
844 		return (-1);
845 
846 	if (smb_server_lookup(&sv))
847 		return (-1);
848 
849 	dr_ulist->dul_cnt =
850 	    smb_server_ulist_geti(&sv->sv_nbt_daemon.ld_session_list,
851 	    offset, dr_ulist->dul_users, max_cnt);
852 	dr_ulist->dul_cnt +=
853 	    smb_server_ulist_geti(&sv->sv_tcp_daemon.ld_session_list,
854 	    offset - dr_ulist->dul_cnt, &dr_ulist->dul_users[dr_ulist->dul_cnt],
855 	    max_cnt);
856 
857 	return (dr_ulist->dul_cnt);
858 }
859 
860 /*
861  * smb_server_share_export()
862  *
863  * This function handles kernel processing at share enable time.
864  *
865  * At share-enable time (LMSHRD_ADD), the file system corresponding to
866  * the share is checked for characteristics that are required for SMB
867  * sharing.  If this check passes, then a hold is taken on the root vnode
868  * of the file system (or a reference count on the corresponding smb_vfs_t
869  * is bumped), preventing an unmount.  (See smb_vfs_hold()).
870  */
871 
872 int
873 smb_server_share_export(char *path)
874 {
875 	smb_server_t	*sv;
876 	int		error;
877 	smb_node_t	*fnode = NULL;
878 	smb_node_t	*dnode;
879 	smb_attr_t	ret_attr;
880 	char		last_comp[MAXNAMELEN];
881 	smb_request_t	*sr;
882 
883 	if (smb_server_lookup(&sv))
884 		return (EINVAL);
885 
886 	sr = smb_request_alloc(sv->sv_session, 0);
887 	if (sr == NULL) {
888 		smb_server_release(sv);
889 		return (ENOMEM);
890 	}
891 
892 	sr->user_cr = kcred;
893 
894 	error = smb_pathname_reduce(sr, kcred, path, NULL, NULL, &dnode,
895 	    last_comp);
896 
897 	if (error) {
898 		smb_request_free(sr);
899 		smb_server_release(sv);
900 		return (error);
901 	}
902 
903 	error = smb_fsop_lookup(sr, sr->user_cr, SMB_FOLLOW_LINKS, NULL, dnode,
904 	    last_comp, &fnode, &ret_attr, NULL, NULL);
905 
906 	smb_node_release(dnode);
907 
908 	if (error) {
909 		smb_request_free(sr);
910 		smb_server_release(sv);
911 		return (error);
912 	}
913 
914 	ASSERT(fnode->vp && fnode->vp->v_vfsp);
915 
916 #ifdef SMB_ENFORCE_NODEV
917 	if (vfs_optionisset(fnode->vp->v_vfsp, MNTOPT_NODEVICES, NULL) == 0)
918 		return (EINVAL);
919 #endif /* SMB_ENFORCE_NODEV */
920 
921 	if (!smb_vfs_hold(sv, fnode->vp->v_vfsp)) {
922 		smb_node_release(fnode);
923 		smb_request_free(sr);
924 		smb_server_release(sv);
925 		return (ENOMEM);
926 	}
927 
928 	/*
929 	 * The refcount on the smb_vfs has been incremented.
930 	 * If it wasn't already, a hold has also been taken
931 	 * on the root vnode of the file system.
932 	 */
933 
934 	smb_node_release(fnode);
935 	smb_request_free(sr);
936 	smb_server_release(sv);
937 	return (0);
938 }
939 
940 
941 
942 /*
943  * smb_server_share_unexport()
944  *
945  * This function handles kernel processing at share disable time.
946  *
947  * At share-disable time (LMSHRD_DELETE), the reference count on the
948  * corresponding smb_vfs_t is decremented.  If this is the last share
949  * on the file system, the hold on the root vnode of the file system
950  * will be released.  (See smb_vfs_rele().)
951  */
952 
953 int
954 smb_server_share_unexport(char *path, char *sharename)
955 {
956 	smb_server_t	*sv;
957 	int		error;
958 	smb_node_t	*fnode = NULL;
959 	smb_node_t	*dnode;
960 	smb_attr_t	ret_attr;
961 	char		last_comp[MAXNAMELEN];
962 	smb_request_t	*sr;
963 
964 	if (smb_server_lookup(&sv))
965 		return (EINVAL);
966 
967 	sr = smb_request_alloc(sv->sv_session, 0);
968 	if (sr == NULL) {
969 		smb_server_release(sv);
970 		return (ENOMEM);
971 	}
972 	sr->user_cr = kcred;
973 
974 	error = smb_pathname_reduce(sr, kcred, path, NULL, NULL, &dnode,
975 	    last_comp);
976 
977 	if (error) {
978 		smb_request_free(sr);
979 		smb_server_release(sv);
980 		return (error);
981 	}
982 
983 	error = smb_fsop_lookup(sr, kcred, SMB_FOLLOW_LINKS, NULL, dnode,
984 	    last_comp, &fnode, &ret_attr, NULL, NULL);
985 
986 	smb_node_release(dnode);
987 
988 	if (error) {
989 		smb_request_free(sr);
990 		smb_server_release(sv);
991 		return (error);
992 	}
993 
994 	ASSERT(fnode->vp && fnode->vp->v_vfsp);
995 
996 	smb_session_disconnect_share(&sv->sv_nbt_daemon.ld_session_list,
997 	    sharename);
998 	smb_session_disconnect_share(&sv->sv_tcp_daemon.ld_session_list,
999 	    sharename);
1000 	smb_vfs_rele(sv, fnode->vp->v_vfsp);
1001 	smb_node_release(fnode);
1002 	smb_request_free(sr);
1003 	smb_server_release(sv);
1004 	return (0);
1005 }
1006 
1007 /*
1008  * This is a special interface that will be utilized by ZFS to cause a share to
1009  * be added/removed.
1010  *
1011  * arg is either a lmshare_info_t or share_name from userspace.
1012  * It will need to be copied into the kernel.   It is lmshare_info_t
1013  * for add operations and share_name for delete operations.
1014  */
1015 int
1016 smb_server_share(void *arg, boolean_t add_share)
1017 {
1018 	smb_server_t	*sv;
1019 	int		rc;
1020 
1021 	rc = smb_server_lookup(&sv);
1022 	if (rc == 0) {
1023 		mutex_enter(&sv->sv_mutex);
1024 		if (sv->sv_state == SMB_SERVER_STATE_RUNNING) {
1025 			mutex_exit(&sv->sv_mutex);
1026 			rc = lmshrd_share_upcall(sv->sv_lmshrd, arg, add_share);
1027 		} else {
1028 			mutex_exit(&sv->sv_mutex);
1029 			rc = EPERM;
1030 		}
1031 		smb_server_release(sv);
1032 	}
1033 	return (rc);
1034 }
1035 
1036 /*
1037  * *****************************************************************************
1038  * **************** Functions called from the internal layers ******************
1039  * *****************************************************************************
1040  *
1041  * These functions are provided the relevant smb server by the caller.
1042  */
1043 
1044 void
1045 smb_server_reconnection_check(smb_server_t *sv, smb_session_t *session)
1046 {
1047 	ASSERT(sv == session->s_server);
1048 
1049 	smb_session_reconnection_check(&sv->sv_nbt_daemon.ld_session_list,
1050 	    session);
1051 	smb_session_reconnection_check(&sv->sv_tcp_daemon.ld_session_list,
1052 	    session);
1053 }
1054 
1055 void
1056 smb_server_get_cfg(smb_server_t *sv, smb_kmod_cfg_t *cfg)
1057 {
1058 	rw_enter(&sv->sv_cfg_lock, RW_READER);
1059 	bcopy(&sv->sv_cfg, cfg, sizeof (*cfg));
1060 	rw_exit(&sv->sv_cfg_lock);
1061 }
1062 
1063 /*
1064  * *****************************************************************************
1065  * *************************** Static Functions ********************************
1066  * *****************************************************************************
1067  */
1068 
1069 static void
1070 smb_server_timers(smb_thread_t *thread, void *arg)
1071 {
1072 	smb_server_t	*sv = (smb_server_t *)arg;
1073 
1074 	ASSERT(sv != NULL);
1075 
1076 	while (smb_thread_continue_timedwait(thread, 1 /* Seconds */)) {
1077 		smb_session_timers(&sv->sv_nbt_daemon.ld_session_list);
1078 		smb_session_timers(&sv->sv_tcp_daemon.ld_session_list);
1079 	}
1080 }
1081 
1082 /*
1083  * smb_server_kstat_init
1084  */
1085 static int
1086 smb_server_kstat_init(smb_server_t *sv)
1087 {
1088 	(void) snprintf(sv->sv_ksp_name, sizeof (sv->sv_ksp_name), "%s%d",
1089 	    SMBSRV_KSTAT_NAME, sv->sv_zid);
1090 
1091 	sv->sv_ksp = kstat_create(SMBSRV_KSTAT_MODULE, 0, sv->sv_ksp_name,
1092 	    SMBSRV_KSTAT_CLASS, KSTAT_TYPE_NAMED,
1093 	    sizeof (sv->sv_ks_data) / sizeof (kstat_named_t),
1094 	    KSTAT_FLAG_VIRTUAL);
1095 
1096 	if (sv->sv_ksp) {
1097 		(void) strlcpy(sv->sv_ks_data.state.name, "state",
1098 		    sizeof (sv->sv_ks_data.state.name));
1099 		sv->sv_ks_data.state.data_type = KSTAT_DATA_UINT32;
1100 		(void) strlcpy(sv->sv_ks_data.open_files.name, "open_files",
1101 		    sizeof (sv->sv_ks_data.open_files.name));
1102 		sv->sv_ks_data.open_files.data_type = KSTAT_DATA_UINT32;
1103 		(void) strlcpy(sv->sv_ks_data.open_trees.name, "connections",
1104 		    sizeof (sv->sv_ks_data.open_trees.name));
1105 		sv->sv_ks_data.open_trees.data_type = KSTAT_DATA_UINT32;
1106 		(void) strlcpy(sv->sv_ks_data.open_users.name, "sessions",
1107 		    sizeof (sv->sv_ks_data.open_users.name));
1108 		sv->sv_ks_data.open_users.data_type = KSTAT_DATA_UINT32;
1109 
1110 		mutex_init(&sv->sv_ksp_mutex, NULL, MUTEX_DEFAULT, NULL);
1111 		sv->sv_ksp->ks_lock = &sv->sv_ksp_mutex;
1112 		sv->sv_ksp->ks_data = (void *)&sv->sv_ks_data;
1113 		sv->sv_ksp->ks_update = smb_server_kstat_update_info;
1114 		kstat_install(sv->sv_ksp);
1115 	}
1116 
1117 	/* create and initialize smb kstats - smb_dispatch stats */
1118 	smb_dispatch_kstat_init();
1119 
1120 	return (0);
1121 }
1122 
1123 /*
1124  * smb_server_kstat_fini
1125  */
1126 static void
1127 smb_server_kstat_fini(smb_server_t *sv)
1128 {
1129 	if (sv->sv_ksp) {
1130 		kstat_delete(sv->sv_ksp);
1131 		mutex_destroy(&sv->sv_ksp_mutex);
1132 		sv->sv_ksp = NULL;
1133 	}
1134 	smb_dispatch_kstat_fini();
1135 }
1136 
1137 /* ARGSUSED */
1138 static int
1139 smb_server_kstat_update_info(kstat_t *ksp, int rw)
1140 {
1141 	smb_server_t	*sv;
1142 
1143 	if (rw == KSTAT_WRITE) {
1144 		return (EACCES);
1145 	} else {
1146 		ASSERT(MUTEX_HELD(ksp->ks_lock));
1147 
1148 		_NOTE(LINTED("pointer cast may result in improper alignment"))
1149 		sv = (smb_server_t *)((uint8_t *)(ksp->ks_data) -
1150 		    offsetof(smb_server_t, sv_ks_data));
1151 
1152 		ASSERT(sv->sv_magic == SMB_SERVER_MAGIC);
1153 
1154 		sv->sv_ks_data.state.value.ui32 = sv->sv_state;
1155 		sv->sv_ks_data.open_files.value.ui32 = sv->sv_open_files;
1156 		sv->sv_ks_data.open_trees.value.ui32 = sv->sv_open_trees;
1157 		sv->sv_ks_data.open_users.value.ui32 = sv->sv_open_users;
1158 	}
1159 	return (0);
1160 }
1161 
1162 /*
1163  * smb_server_stop
1164  *
1165  * The mutex of the server must have been entered before calling this function.
1166  */
1167 static void
1168 smb_server_stop(smb_server_t *sv)
1169 {
1170 	ASSERT(sv->sv_magic == SMB_SERVER_MAGIC);
1171 
1172 	smb_winpipe_close();
1173 	smb_thread_stop(&sv->si_thread_timers);
1174 	smb_kdoor_clnt_stop();
1175 	lmshrd_kclient_fini(sv->sv_lmshrd);
1176 	smb_server_fsop_stop(sv);
1177 	if (sv->sv_session) {
1178 		smb_session_delete(sv->sv_session);
1179 		sv->sv_session = NULL;
1180 	}
1181 }
1182 
1183 static int
1184 smb_server_listen(
1185     smb_server_t		*sv,
1186     smb_listener_daemon_t	*ld,
1187     in_port_t			port,
1188     int				pthread_create_error)
1189 {
1190 	int			rc;
1191 	struct sonode		*s_so;
1192 	uint32_t		on = 1;
1193 	smb_session_t		*session;
1194 
1195 	if (pthread_create_error) {
1196 		/*
1197 		 * Delete the last session created. The user space thread
1198 		 * creation failed.
1199 		 */
1200 		smb_session_list_delete_tail(&ld->ld_session_list);
1201 	}
1202 
1203 	if (ld->ld_so == NULL) {
1204 		/* First time listener */
1205 		ld->ld_sin.sin_family = AF_INET;
1206 		ld->ld_sin.sin_port = htons(port);
1207 		ld->ld_sin.sin_addr.s_addr = htonl(INADDR_ANY);
1208 		ld->ld_so = smb_socreate(AF_INET, SOCK_STREAM, 0);
1209 
1210 		if (ld->ld_so) {
1211 
1212 			(void) sosetsockopt(ld->ld_so, SOL_SOCKET,
1213 			    SO_REUSEADDR, (const void *)&on, sizeof (on));
1214 
1215 			rc = sobind(ld->ld_so, (struct sockaddr *)&ld->ld_sin,
1216 			    sizeof (ld->ld_sin), 0, 0);
1217 
1218 			if (rc == 0) {
1219 				rc =  solisten(ld->ld_so, 20);
1220 				if (rc < 0) {
1221 					cmn_err(CE_WARN,
1222 					    "Port %d: listen failed", port);
1223 					smb_soshutdown(ld->ld_so);
1224 					smb_sodestroy(ld->ld_so);
1225 					ld->ld_so = NULL;
1226 					return (rc);
1227 				}
1228 			} else {
1229 				cmn_err(CE_WARN,
1230 				    "Port %d: bind failed", port);
1231 				smb_soshutdown(ld->ld_so);
1232 				smb_sodestroy(ld->ld_so);
1233 				ld->ld_so = NULL;
1234 				return (rc);
1235 			}
1236 		} else {
1237 			cmn_err(CE_WARN,
1238 			    "Port %d: socket create failed", port);
1239 			return (ENOMEM);
1240 		}
1241 	}
1242 
1243 	DTRACE_PROBE1(so__wait__accept, struct sonode *, ld->ld_so);
1244 
1245 	for (;;) {
1246 		rc = soaccept(ld->ld_so, 0, &s_so);
1247 		if (rc == 0) {
1248 			uint32_t	txbuf_size = 128*1024;
1249 			uint32_t	on = 1;
1250 
1251 			DTRACE_PROBE1(so__accept, struct sonode *, s_so);
1252 
1253 			(void) sosetsockopt(s_so, IPPROTO_TCP, TCP_NODELAY,
1254 			    (const void *)&on, sizeof (on));
1255 			(void) sosetsockopt(s_so, SOL_SOCKET, SO_KEEPALIVE,
1256 			    (const void *)&on, sizeof (on));
1257 			(void) sosetsockopt(s_so, SOL_SOCKET, SO_SNDBUF,
1258 			    (const void *)&txbuf_size, sizeof (txbuf_size));
1259 			/*
1260 			 * Create a session for this connection.
1261 			 */
1262 			session = smb_session_create(s_so, port, sv);
1263 			if (session) {
1264 				smb_session_list_append(&ld->ld_session_list,
1265 				    session);
1266 				break;
1267 			} else {
1268 				smb_soshutdown(s_so);
1269 				smb_sodestroy(s_so);
1270 			}
1271 			continue;
1272 		}
1273 		smb_session_list_signal(&ld->ld_session_list);
1274 		smb_soshutdown(ld->ld_so);
1275 		smb_sodestroy(ld->ld_so);
1276 		ld->ld_so = NULL;
1277 		break;
1278 	}
1279 
1280 	return (rc);
1281 }
1282 
1283 /*
1284  * smb_server_lookup
1285  *
1286  * This function tries to find the server associated with the zone of the
1287  * caller.
1288  */
1289 static int
1290 smb_server_lookup(smb_server_t **psv)
1291 {
1292 	zoneid_t	zid;
1293 	smb_server_t	*sv;
1294 
1295 	zid = getzoneid();
1296 
1297 	smb_llist_enter(&smb_servers, RW_READER);
1298 	sv = smb_llist_head(&smb_servers);
1299 	while (sv) {
1300 		ASSERT(sv->sv_magic == SMB_SERVER_MAGIC);
1301 		if (sv->sv_zid == zid) {
1302 			mutex_enter(&sv->sv_mutex);
1303 			if (sv->sv_state != SMB_SERVER_STATE_DELETING) {
1304 				sv->sv_refcnt++;
1305 				mutex_exit(&sv->sv_mutex);
1306 				smb_llist_exit(&smb_servers);
1307 				*psv = sv;
1308 				return (0);
1309 			}
1310 			mutex_exit(&sv->sv_mutex);
1311 			break;
1312 		}
1313 		sv = smb_llist_next(&smb_servers, sv);
1314 	}
1315 	smb_llist_exit(&smb_servers);
1316 	return (EPERM);
1317 }
1318 
1319 /*
1320  * smb_server_release
1321  *
1322  * This function decrements the reference count of the server and signals its
1323  * condition variable if the state of the server is SMB_SERVER_STATE_DELETING.
1324  */
1325 static void
1326 smb_server_release(smb_server_t *sv)
1327 {
1328 	ASSERT(sv->sv_magic == SMB_SERVER_MAGIC);
1329 
1330 	mutex_enter(&sv->sv_mutex);
1331 	ASSERT(sv->sv_refcnt);
1332 	sv->sv_refcnt--;
1333 	if ((sv->sv_refcnt == 0) && (sv->sv_state == SMB_SERVER_STATE_DELETING))
1334 		cv_signal(&sv->sv_cv);
1335 	mutex_exit(&sv->sv_mutex);
1336 }
1337 
1338 static int
1339 smb_server_ulist_geti(
1340     smb_session_list_t	*se,
1341     int			offset,
1342     smb_dr_user_ctx_t	*uinfo,
1343     int			max_cnt)
1344 {
1345 	smb_session_t	*sn = NULL;
1346 	smb_user_t	*user;
1347 	smb_llist_t	*ulist;
1348 	int		cnt = 0, skip = 0;
1349 
1350 	rw_enter(&se->se_lock, RW_READER);
1351 	sn = list_head(&se->se_act.lst);
1352 	while (sn && (cnt < max_cnt)) {
1353 		ASSERT(sn->s_magic == SMB_SESSION_MAGIC);
1354 		ulist = &sn->s_user_list;
1355 		smb_llist_enter(ulist, RW_READER);
1356 		user = smb_llist_head(ulist);
1357 		while (user && (cnt < max_cnt)) {
1358 			ASSERT(user->u_magic == SMB_USER_MAGIC);
1359 			mutex_enter(&user->u_mutex);
1360 			if (user->u_state == SMB_USER_STATE_LOGGED_IN) {
1361 				if (skip++ < offset) {
1362 					mutex_exit(&user->u_mutex);
1363 					user = smb_llist_next(ulist, user);
1364 					continue;
1365 				}
1366 
1367 				if (smb_dr_user_create(uinfo, sn->s_kid,
1368 				    user->u_uid, user->u_domain, user->u_name,
1369 				    sn->workstation, sn->ipaddr, sn->native_os,
1370 				    user->u_logon_time, user->u_flags) != 0) {
1371 					mutex_exit(&user->u_mutex);
1372 					user = smb_llist_next(ulist, user);
1373 					continue;
1374 				}
1375 				uinfo++;
1376 				cnt++;
1377 			}
1378 			mutex_exit(&user->u_mutex);
1379 			user = smb_llist_next(ulist, user);
1380 		}
1381 		smb_llist_exit(ulist);
1382 	}
1383 	rw_exit(&se->se_lock);
1384 	return (cnt);
1385 }
1386 
1387 static void
1388 smb_server_store_cfg(smb_server_t *sv, smb_kmod_cfg_t *cfg)
1389 {
1390 	if (cfg->skc_maxconnections == 0)
1391 		cfg->skc_maxconnections = 0xFFFFFFFF;
1392 
1393 	/*
1394 	 * XXX should not override configuration.
1395 	 * For now, this disables server side
1396 	 * signing regardless of configuration.
1397 	 */
1398 	cfg->skc_signing_enable = 0;
1399 	cfg->skc_signing_required = 0;
1400 	cfg->skc_signing_check = 0;
1401 
1402 	smb_session_correct_keep_alive_values(
1403 	    &sv->sv_nbt_daemon.ld_session_list, cfg->skc_keepalive);
1404 	smb_session_correct_keep_alive_values(
1405 	    &sv->sv_tcp_daemon.ld_session_list, cfg->skc_keepalive);
1406 
1407 	/*
1408 	 * XXX The following code was pulled from smb_oplock_init.
1409 	 * It should be combined with with the config process if
1410 	 * this info will be stored with the configuration or with
1411 	 * the smb_fsop_start function if the data will be stored
1412 	 * in the root of the fs.
1413 	 */
1414 
1415 	/*
1416 	 * XXX oplock enable flag.
1417 	 * Should be stored in extended attribute in root of fs
1418 	 * or a ZFS user-defined property.
1419 	 */
1420 	if (cfg->skc_oplock_enable == 0) {
1421 		cmn_err(CE_NOTE, "SmbOplocks: disabled");
1422 	}
1423 
1424 	bcopy(cfg, &sv->sv_cfg, sizeof (sv->sv_cfg));
1425 }
1426 
1427 static int
1428 smb_server_fsop_start(smb_server_t *sv)
1429 {
1430 	int	error;
1431 
1432 	error = smb_node_root_init(rootdir, sv, &sv->si_root_smb_node);
1433 	if (error != 0)
1434 		sv->si_root_smb_node = NULL;
1435 
1436 	return (error);
1437 }
1438 
1439 static void
1440 smb_server_fsop_stop(smb_server_t *sv)
1441 {
1442 	if (sv->si_root_smb_node != NULL) {
1443 		smb_vfs_rele_all(sv);
1444 		smb_node_release(sv->si_root_smb_node);
1445 		sv->si_root_smb_node = NULL;
1446 	}
1447 }
1448