FreeBSD/Linux Kernel Cross Reference
sys/netsmb/smb_conn.c
1 /*-
2 * Copyright (c) 2000-2001 Boris Popov
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by Boris Popov.
16 * 4. Neither the name of the author nor the names of any co-contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33 /*
34 * Connection engine.
35 */
36
37 #include <sys/cdefs.h>
38 __FBSDID("$FreeBSD: releng/6.2/sys/netsmb/smb_conn.c 146179 2005-05-13 11:27:48Z peadar $");
39
40 #include <sys/param.h>
41 #include <sys/systm.h>
42 #include <sys/kernel.h>
43 #include <sys/malloc.h>
44 #include <sys/proc.h>
45 #include <sys/lock.h>
46 #include <sys/sysctl.h>
47 #include <sys/socketvar.h>
48
49 #include <sys/iconv.h>
50
51 #include <netsmb/smb.h>
52 #include <netsmb/smb_subr.h>
53 #include <netsmb/smb_conn.h>
54 #include <netsmb/smb_tran.h>
55 #include <netsmb/smb_trantcp.h>
56
57 static struct smb_connobj smb_vclist;
58 static int smb_vcnext = 1; /* next unique id for VC */
59
60 SYSCTL_NODE(_net, OID_AUTO, smb, CTLFLAG_RW, NULL, "SMB protocol");
61
62 MALLOC_DEFINE(M_SMBCONN, "SMB conn", "SMB connection");
63
64 static void smb_co_init(struct smb_connobj *cp, int level, char *objname,
65 struct thread *td);
66 static void smb_co_done(struct smb_connobj *cp);
67 static int smb_co_lockstatus(struct smb_connobj *cp, struct thread *td);
68
69 static int smb_vc_disconnect(struct smb_vc *vcp);
70 static void smb_vc_free(struct smb_connobj *cp);
71 static void smb_vc_gone(struct smb_connobj *cp, struct smb_cred *scred);
72 static smb_co_free_t smb_share_free;
73 static smb_co_gone_t smb_share_gone;
74
75 static int smb_sysctl_treedump(SYSCTL_HANDLER_ARGS);
76
77 SYSCTL_PROC(_net_smb, OID_AUTO, treedump, CTLFLAG_RD | CTLTYPE_OPAQUE,
78 NULL, 0, smb_sysctl_treedump, "S,treedump", "Requester tree");
79
80 int
81 smb_sm_init(void)
82 {
83
84 smb_co_init(&smb_vclist, SMBL_SM, "smbsm", curthread);
85 smb_co_unlock(&smb_vclist, 0, curthread);
86 return 0;
87 }
88
89 int
90 smb_sm_done(void)
91 {
92
93 /* XXX: hold the mutex */
94 if (smb_vclist.co_usecount > 1) {
95 SMBERROR("%d connections still active\n", smb_vclist.co_usecount - 1);
96 return EBUSY;
97 }
98 lockmgr(&smb_vclist.co_lock, LK_DRAIN, 0, curthread);
99 smb_co_done(&smb_vclist);
100 return 0;
101 }
102
103 static int
104 smb_sm_lockvclist(int flags, struct thread *td)
105 {
106
107 return smb_co_lock(&smb_vclist, flags | LK_CANRECURSE, td);
108 }
109
110 static void
111 smb_sm_unlockvclist(struct thread *td)
112 {
113
114 smb_co_unlock(&smb_vclist, LK_RELEASE, td);
115 }
116
117 static int
118 smb_sm_lookupint(struct smb_vcspec *vcspec, struct smb_sharespec *shspec,
119 struct smb_cred *scred, struct smb_vc **vcpp)
120 {
121 struct thread *td = scred->scr_td;
122 struct smb_connobj *scp;
123 struct smb_vc *vcp;
124 int exact = 1;
125 int error;
126
127 vcspec->shspec = shspec;
128 error = ENOENT;
129 vcp = NULL;
130 SMBCO_FOREACH(scp, &smb_vclist) {
131 vcp = (struct smb_vc *)scp;
132 error = smb_vc_lock(vcp, LK_EXCLUSIVE, td);
133 if (error)
134 continue;
135
136 if ((vcp->obj.co_flags & SMBV_PRIVATE) ||
137 !CONNADDREQ(vcp->vc_paddr, vcspec->sap) ||
138 strcmp(vcp->vc_username, vcspec->username) != 0)
139 goto err1;
140 if (vcspec->owner != SMBM_ANY_OWNER) {
141 if (vcp->vc_uid != vcspec->owner)
142 goto err1;
143 } else
144 exact = 0;
145 if (vcspec->group != SMBM_ANY_GROUP) {
146 if (vcp->vc_grp != vcspec->group)
147 goto err1;
148 } else
149 exact = 0;
150 if (vcspec->mode & SMBM_EXACT) {
151 if (!exact || (vcspec->mode & SMBM_MASK) !=
152 vcp->vc_mode)
153 goto err1;
154 }
155 if (smb_vc_access(vcp, scred, vcspec->mode) != 0)
156 goto err1;
157 vcspec->ssp = NULL;
158 if (shspec) {
159 error = (int)smb_vc_lookupshare(vcp, shspec, scred,
160 &vcspec->ssp);
161 if (error)
162 goto fail;
163 }
164 error = 0;
165 break;
166 err1:
167 error = 1;
168 fail:
169 smb_vc_unlock(vcp, 0, td);
170 }
171 if (vcp) {
172 smb_vc_ref(vcp);
173 *vcpp = vcp;
174 }
175 return (error);
176 }
177
178 int
179 smb_sm_lookup(struct smb_vcspec *vcspec, struct smb_sharespec *shspec,
180 struct smb_cred *scred, struct smb_vc **vcpp)
181 {
182 struct thread *td = scred->scr_td;
183 struct smb_vc *vcp;
184 struct smb_share *ssp = NULL;
185 int error;
186
187 *vcpp = vcp = NULL;
188
189 error = smb_sm_lockvclist(LK_EXCLUSIVE, td);
190 if (error)
191 return error;
192 error = smb_sm_lookupint(vcspec, shspec, scred, vcpp);
193 if (error == 0 || (vcspec->flags & SMBV_CREATE) == 0) {
194 smb_sm_unlockvclist(td);
195 return error;
196 }
197 error = smb_sm_lookupint(vcspec, NULL, scred, &vcp);
198 if (error) {
199 error = smb_vc_create(vcspec, scred, &vcp);
200 if (error)
201 goto out;
202 error = smb_vc_connect(vcp, scred);
203 if (error)
204 goto out;
205 }
206 if (shspec == NULL)
207 goto out;
208 error = smb_share_create(vcp, shspec, scred, &ssp);
209 if (error)
210 goto out;
211 error = smb_smb_treeconnect(ssp, scred);
212 if (error == 0)
213 vcspec->ssp = ssp;
214 else
215 smb_share_put(ssp, scred);
216 out:
217 smb_sm_unlockvclist(td);
218 if (error == 0)
219 *vcpp = vcp;
220 else if (vcp)
221 smb_vc_put(vcp, scred);
222 return error;
223 }
224
225 /*
226 * Common code for connection object
227 */
228 static void
229 smb_co_init(struct smb_connobj *cp, int level, char *objname, struct thread *td)
230 {
231 SLIST_INIT(&cp->co_children);
232 smb_sl_init(&cp->co_interlock, objname);
233 lockinit(&cp->co_lock, PZERO, objname, 0, 0);
234 cp->co_level = level;
235 cp->co_usecount = 1;
236 KASSERT(smb_co_lock(cp, LK_EXCLUSIVE, td) == 0, ("smb_co_init: lock failed"));
237 }
238
239 static void
240 smb_co_done(struct smb_connobj *cp)
241 {
242 smb_sl_destroy(&cp->co_interlock);
243 lockmgr(&cp->co_lock, LK_RELEASE, 0, curthread);
244 lockdestroy(&cp->co_lock);
245 }
246
247 static void
248 smb_co_gone(struct smb_connobj *cp, struct smb_cred *scred)
249 {
250 struct smb_connobj *parent;
251
252 if (cp->co_gone)
253 cp->co_gone(cp, scred);
254 parent = cp->co_parent;
255 if (parent) {
256 smb_co_lock(parent, LK_EXCLUSIVE, scred->scr_td);
257 SLIST_REMOVE(&parent->co_children, cp, smb_connobj, co_next);
258 smb_co_put(parent, scred);
259 }
260 if (cp->co_free)
261 cp->co_free(cp);
262 }
263
264 void
265 smb_co_ref(struct smb_connobj *cp)
266 {
267
268 SMB_CO_LOCK(cp);
269 cp->co_usecount++;
270 SMB_CO_UNLOCK(cp);
271 }
272
273 void
274 smb_co_rele(struct smb_connobj *cp, struct smb_cred *scred)
275 {
276 struct thread *td = scred->scr_td;
277
278 SMB_CO_LOCK(cp);
279 if (cp->co_usecount > 1) {
280 cp->co_usecount--;
281 SMB_CO_UNLOCK(cp);
282 return;
283 }
284 if (cp->co_usecount == 0) {
285 SMBERROR("negative use_count for object %d", cp->co_level);
286 SMB_CO_UNLOCK(cp);
287 return;
288 }
289 cp->co_usecount--;
290 cp->co_flags |= SMBO_GONE;
291
292 lockmgr(&cp->co_lock, LK_DRAIN | LK_INTERLOCK, &cp->co_interlock, td);
293 smb_co_gone(cp, scred);
294 }
295
296 int
297 smb_co_get(struct smb_connobj *cp, int flags, struct smb_cred *scred)
298 {
299 int error;
300
301 if ((flags & LK_INTERLOCK) == 0)
302 SMB_CO_LOCK(cp);
303 cp->co_usecount++;
304 error = smb_co_lock(cp, flags | LK_INTERLOCK, scred->scr_td);
305 if (error) {
306 SMB_CO_LOCK(cp);
307 cp->co_usecount--;
308 SMB_CO_UNLOCK(cp);
309 return error;
310 }
311 return 0;
312 }
313
314 void
315 smb_co_put(struct smb_connobj *cp, struct smb_cred *scred)
316 {
317 struct thread *td = scred->scr_td;
318
319 SMB_CO_LOCK(cp);
320 if (cp->co_usecount > 1) {
321 cp->co_usecount--;
322 } else if (cp->co_usecount == 1) {
323 cp->co_usecount--;
324 cp->co_flags |= SMBO_GONE;
325 } else {
326 SMBERROR("negative usecount");
327 }
328 lockmgr(&cp->co_lock, LK_RELEASE | LK_INTERLOCK, &cp->co_interlock, td);
329 if ((cp->co_flags & SMBO_GONE) == 0)
330 return;
331 lockmgr(&cp->co_lock, LK_DRAIN, NULL, td);
332 smb_co_gone(cp, scred);
333 }
334
335 int
336 smb_co_lockstatus(struct smb_connobj *cp, struct thread *td)
337 {
338 return lockstatus(&cp->co_lock, td);
339 }
340
341 int
342 smb_co_lock(struct smb_connobj *cp, int flags, struct thread *td)
343 {
344
345 if (cp->co_flags & SMBO_GONE)
346 return EINVAL;
347 if ((flags & LK_TYPE_MASK) == 0)
348 flags |= LK_EXCLUSIVE;
349 if (smb_co_lockstatus(cp, td) == LK_EXCLUSIVE &&
350 (flags & LK_CANRECURSE) == 0) {
351 SMBERROR("recursive lock for object %d\n", cp->co_level);
352 return 0;
353 }
354 return lockmgr(&cp->co_lock, flags, &cp->co_interlock, td);
355 }
356
357 void
358 smb_co_unlock(struct smb_connobj *cp, int flags, struct thread *td)
359 {
360 (void)lockmgr(&cp->co_lock, flags | LK_RELEASE, &cp->co_interlock, td);
361 }
362
363 static void
364 smb_co_addchild(struct smb_connobj *parent, struct smb_connobj *child)
365 {
366 KASSERT(smb_co_lockstatus(parent, curthread) == LK_EXCLUSIVE, ("smb_co_addchild: parent not locked"));
367 KASSERT(smb_co_lockstatus(child, curthread) == LK_EXCLUSIVE, ("smb_co_addchild: child not locked"));
368
369 smb_co_ref(parent);
370 SLIST_INSERT_HEAD(&parent->co_children, child, co_next);
371 child->co_parent = parent;
372 }
373
374 /*
375 * Session implementation
376 */
377
378 int
379 smb_vc_create(struct smb_vcspec *vcspec,
380 struct smb_cred *scred, struct smb_vc **vcpp)
381 {
382 struct smb_vc *vcp;
383 struct thread *td = scred->scr_td;
384 struct ucred *cred = scred->scr_cred;
385 uid_t uid = vcspec->owner;
386 gid_t gid = vcspec->group;
387 uid_t realuid = cred->cr_uid;
388 char *domain = vcspec->domain;
389 int error, isroot;
390
391 isroot = smb_suser(cred) == 0;
392 /*
393 * Only superuser can create VCs with different uid and gid
394 */
395 if (uid != SMBM_ANY_OWNER && uid != realuid && !isroot)
396 return EPERM;
397 if (gid != SMBM_ANY_GROUP && !groupmember(gid, cred) && !isroot)
398 return EPERM;
399
400 vcp = smb_zmalloc(sizeof(*vcp), M_SMBCONN, M_WAITOK);
401 smb_co_init(VCTOCP(vcp), SMBL_VC, "smb_vc", td);
402 vcp->obj.co_free = smb_vc_free;
403 vcp->obj.co_gone = smb_vc_gone;
404 vcp->vc_number = smb_vcnext++;
405 vcp->vc_timo = SMB_DEFRQTIMO;
406 vcp->vc_smbuid = SMB_UID_UNKNOWN;
407 vcp->vc_mode = vcspec->rights & SMBM_MASK;
408 vcp->obj.co_flags = vcspec->flags & (SMBV_PRIVATE | SMBV_SINGLESHARE);
409 vcp->vc_tdesc = &smb_tran_nbtcp_desc;
410 vcp->vc_seqno = 0;
411 vcp->vc_mackey = NULL;
412 vcp->vc_mackeylen = 0;
413
414 if (uid == SMBM_ANY_OWNER)
415 uid = realuid;
416 if (gid == SMBM_ANY_GROUP)
417 gid = cred->cr_groups[0];
418 vcp->vc_uid = uid;
419 vcp->vc_grp = gid;
420
421 smb_sl_init(&vcp->vc_stlock, "vcstlock");
422 error = ENOMEM;
423
424 vcp->vc_paddr = sodupsockaddr(vcspec->sap, M_WAITOK);
425 if (vcp->vc_paddr == NULL)
426 goto fail;
427 vcp->vc_laddr = sodupsockaddr(vcspec->lap, M_WAITOK);
428 if (vcp->vc_laddr == NULL)
429 goto fail;
430 vcp->vc_pass = smb_strdup(vcspec->pass);
431 if (vcp->vc_pass == NULL)
432 goto fail;
433 vcp->vc_domain = smb_strdup((domain && domain[0]) ? domain :
434 "NODOMAIN");
435 if (vcp->vc_domain == NULL)
436 goto fail;
437 vcp->vc_srvname = smb_strdup(vcspec->srvname);
438 if (vcp->vc_srvname == NULL)
439 goto fail;
440 vcp->vc_username = smb_strdup(vcspec->username);
441 if (vcp->vc_username == NULL)
442 goto fail;
443 error = (int)iconv_open("tolower", vcspec->localcs, &vcp->vc_tolower);
444 if (error)
445 goto fail;
446 error = (int)iconv_open("toupper", vcspec->localcs, &vcp->vc_toupper);
447 if (error)
448 goto fail;
449 if (vcspec->servercs[0]) {
450 error = (int)iconv_open(vcspec->servercs, vcspec->localcs,
451 &vcp->vc_toserver);
452 if (error)
453 goto fail;
454 error = (int)iconv_open(vcspec->localcs, vcspec->servercs,
455 &vcp->vc_tolocal);
456 if (error)
457 goto fail;
458 }
459 error = (int)smb_iod_create(vcp);
460 if (error)
461 goto fail;
462 *vcpp = vcp;
463 smb_co_addchild(&smb_vclist, VCTOCP(vcp));
464 return (0);
465
466 fail:
467 smb_vc_put(vcp, scred);
468 return (error);
469 }
470
471 static void
472 smb_vc_free(struct smb_connobj *cp)
473 {
474 struct smb_vc *vcp = CPTOVC(cp);
475
476 if (vcp->vc_iod)
477 smb_iod_destroy(vcp->vc_iod);
478 SMB_STRFREE(vcp->vc_username);
479 SMB_STRFREE(vcp->vc_srvname);
480 SMB_STRFREE(vcp->vc_pass);
481 SMB_STRFREE(vcp->vc_domain);
482 if (vcp->vc_mackey)
483 free(vcp->vc_mackey, M_SMBTEMP);
484 if (vcp->vc_paddr)
485 free(vcp->vc_paddr, M_SONAME);
486 if (vcp->vc_laddr)
487 free(vcp->vc_laddr, M_SONAME);
488 if (vcp->vc_tolower)
489 iconv_close(vcp->vc_tolower);
490 if (vcp->vc_toupper)
491 iconv_close(vcp->vc_toupper);
492 if (vcp->vc_tolocal)
493 iconv_close(vcp->vc_tolocal);
494 if (vcp->vc_toserver)
495 iconv_close(vcp->vc_toserver);
496 smb_co_done(VCTOCP(vcp));
497 smb_sl_destroy(&vcp->vc_stlock);
498 free(vcp, M_SMBCONN);
499 }
500
501 /*
502 * Called when use count of VC dropped to zero.
503 * VC should be locked on enter with LK_DRAIN.
504 */
505 static void
506 smb_vc_gone(struct smb_connobj *cp, struct smb_cred *scred)
507 {
508 struct smb_vc *vcp = CPTOVC(cp);
509
510 smb_vc_disconnect(vcp);
511 }
512
513 void
514 smb_vc_ref(struct smb_vc *vcp)
515 {
516 smb_co_ref(VCTOCP(vcp));
517 }
518
519 void
520 smb_vc_rele(struct smb_vc *vcp, struct smb_cred *scred)
521 {
522 smb_co_rele(VCTOCP(vcp), scred);
523 }
524
525 int
526 smb_vc_get(struct smb_vc *vcp, int flags, struct smb_cred *scred)
527 {
528 return smb_co_get(VCTOCP(vcp), flags, scred);
529 }
530
531 void
532 smb_vc_put(struct smb_vc *vcp, struct smb_cred *scred)
533 {
534 smb_co_put(VCTOCP(vcp), scred);
535 }
536
537 int
538 smb_vc_lock(struct smb_vc *vcp, int flags, struct thread *td)
539 {
540 return smb_co_lock(VCTOCP(vcp), flags, td);
541 }
542
543 void
544 smb_vc_unlock(struct smb_vc *vcp, int flags, struct thread *td)
545 {
546 smb_co_unlock(VCTOCP(vcp), flags, td);
547 }
548
549 int
550 smb_vc_access(struct smb_vc *vcp, struct smb_cred *scred, mode_t mode)
551 {
552 struct ucred *cred = scred->scr_cred;
553
554 if (smb_suser(cred) == 0 || cred->cr_uid == vcp->vc_uid)
555 return 0;
556 mode >>= 3;
557 if (!groupmember(vcp->vc_grp, cred))
558 mode >>= 3;
559 return (vcp->vc_mode & mode) == mode ? 0 : EACCES;
560 }
561
562 static int
563 smb_vc_cmpshare(struct smb_share *ssp, struct smb_sharespec *dp)
564 {
565 int exact = 1;
566
567 if (strcmp(ssp->ss_name, dp->name) != 0)
568 return 1;
569 if (dp->owner != SMBM_ANY_OWNER) {
570 if (ssp->ss_uid != dp->owner)
571 return 1;
572 } else
573 exact = 0;
574 if (dp->group != SMBM_ANY_GROUP) {
575 if (ssp->ss_grp != dp->group)
576 return 1;
577 } else
578 exact = 0;
579
580 if (dp->mode & SMBM_EXACT) {
581 if (!exact)
582 return 1;
583 return (dp->mode & SMBM_MASK) == ssp->ss_mode ? 0 : 1;
584 }
585 if (smb_share_access(ssp, dp->scred, dp->mode) != 0)
586 return 1;
587 return 0;
588 }
589
590 /*
591 * Lookup share in the given VC. Share referenced and locked on return.
592 * VC expected to be locked on entry and will be left locked on exit.
593 */
594 int
595 smb_vc_lookupshare(struct smb_vc *vcp, struct smb_sharespec *dp,
596 struct smb_cred *scred, struct smb_share **sspp)
597 {
598 struct thread *td = scred->scr_td;
599 struct smb_connobj *scp = NULL;
600 struct smb_share *ssp = NULL;
601 int error;
602
603 *sspp = NULL;
604 dp->scred = scred;
605 SMBCO_FOREACH(scp, VCTOCP(vcp)) {
606 ssp = (struct smb_share *)scp;
607 error = smb_share_lock(ssp, LK_EXCLUSIVE, td);
608 if (error)
609 continue;
610 if (smb_vc_cmpshare(ssp, dp) == 0)
611 break;
612 smb_share_unlock(ssp, 0, td);
613 }
614 if (ssp) {
615 smb_share_ref(ssp);
616 *sspp = ssp;
617 error = 0;
618 } else
619 error = ENOENT;
620 return error;
621 }
622
623 int
624 smb_vc_connect(struct smb_vc *vcp, struct smb_cred *scred)
625 {
626
627 return smb_iod_request(vcp->vc_iod, SMBIOD_EV_CONNECT | SMBIOD_EV_SYNC, NULL);
628 }
629
630 /*
631 * Destroy VC to server, invalidate shares linked with it.
632 * Transport should be locked on entry.
633 */
634 int
635 smb_vc_disconnect(struct smb_vc *vcp)
636 {
637
638 smb_iod_request(vcp->vc_iod, SMBIOD_EV_DISCONNECT | SMBIOD_EV_SYNC, NULL);
639 return 0;
640 }
641
642 static char smb_emptypass[] = "";
643
644 const char *
645 smb_vc_getpass(struct smb_vc *vcp)
646 {
647 if (vcp->vc_pass)
648 return vcp->vc_pass;
649 return smb_emptypass;
650 }
651
652 static int
653 smb_vc_getinfo(struct smb_vc *vcp, struct smb_vc_info *vip)
654 {
655 bzero(vip, sizeof(struct smb_vc_info));
656 vip->itype = SMB_INFO_VC;
657 vip->usecount = vcp->obj.co_usecount;
658 vip->uid = vcp->vc_uid;
659 vip->gid = vcp->vc_grp;
660 vip->mode = vcp->vc_mode;
661 vip->flags = vcp->obj.co_flags;
662 vip->sopt = vcp->vc_sopt;
663 vip->iodstate = vcp->vc_iod->iod_state;
664 bzero(&vip->sopt.sv_skey, sizeof(vip->sopt.sv_skey));
665 snprintf(vip->srvname, sizeof(vip->srvname), "%s", vcp->vc_srvname);
666 snprintf(vip->vcname, sizeof(vip->vcname), "%s", vcp->vc_username);
667 return 0;
668 }
669
670 u_short
671 smb_vc_nextmid(struct smb_vc *vcp)
672 {
673 u_short r;
674
675 SMB_CO_LOCK(&vcp->obj);
676 r = vcp->vc_mid++;
677 SMB_CO_UNLOCK(&vcp->obj);
678 return r;
679 }
680
681 /*
682 * Share implementation
683 */
684 /*
685 * Allocate share structure and attach it to the given VC
686 * Connection expected to be locked on entry. Share will be returned
687 * in locked state.
688 */
689 int
690 smb_share_create(struct smb_vc *vcp, struct smb_sharespec *shspec,
691 struct smb_cred *scred, struct smb_share **sspp)
692 {
693 struct smb_share *ssp;
694 struct thread *td = scred->scr_td;
695 struct ucred *cred = scred->scr_cred;
696 uid_t realuid = cred->cr_uid;
697 uid_t uid = shspec->owner;
698 gid_t gid = shspec->group;
699 int error, isroot;
700
701 isroot = smb_suser(cred) == 0;
702 /*
703 * Only superuser can create shares with different uid and gid
704 */
705 if (uid != SMBM_ANY_OWNER && uid != realuid && !isroot)
706 return EPERM;
707 if (gid != SMBM_ANY_GROUP && !groupmember(gid, cred) && !isroot)
708 return EPERM;
709 error = smb_vc_lookupshare(vcp, shspec, scred, &ssp);
710 if (!error) {
711 smb_share_put(ssp, scred);
712 return EEXIST;
713 }
714 if (uid == SMBM_ANY_OWNER)
715 uid = realuid;
716 if (gid == SMBM_ANY_GROUP)
717 gid = cred->cr_groups[0];
718 ssp = smb_zmalloc(sizeof(*ssp), M_SMBCONN, M_WAITOK);
719 smb_co_init(SSTOCP(ssp), SMBL_SHARE, "smbss", td);
720 ssp->obj.co_free = smb_share_free;
721 ssp->obj.co_gone = smb_share_gone;
722 smb_sl_init(&ssp->ss_stlock, "ssstlock");
723 ssp->ss_name = smb_strdup(shspec->name);
724 if (shspec->pass && shspec->pass[0])
725 ssp->ss_pass = smb_strdup(shspec->pass);
726 ssp->ss_type = shspec->stype;
727 ssp->ss_tid = SMB_TID_UNKNOWN;
728 ssp->ss_uid = uid;
729 ssp->ss_grp = gid;
730 ssp->ss_mode = shspec->rights & SMBM_MASK;
731 smb_co_addchild(VCTOCP(vcp), SSTOCP(ssp));
732 *sspp = ssp;
733 return 0;
734 }
735
736 static void
737 smb_share_free(struct smb_connobj *cp)
738 {
739 struct smb_share *ssp = CPTOSS(cp);
740
741 SMB_STRFREE(ssp->ss_name);
742 SMB_STRFREE(ssp->ss_pass);
743 smb_sl_destroy(&ssp->ss_stlock);
744 smb_co_done(SSTOCP(ssp));
745 free(ssp, M_SMBCONN);
746 }
747
748 static void
749 smb_share_gone(struct smb_connobj *cp, struct smb_cred *scred)
750 {
751 struct smb_share *ssp = CPTOSS(cp);
752
753 smb_smb_treedisconnect(ssp, scred);
754 }
755
756 void
757 smb_share_ref(struct smb_share *ssp)
758 {
759 smb_co_ref(SSTOCP(ssp));
760 }
761
762 void
763 smb_share_rele(struct smb_share *ssp, struct smb_cred *scred)
764 {
765 smb_co_rele(SSTOCP(ssp), scred);
766 }
767
768 int
769 smb_share_get(struct smb_share *ssp, int flags, struct smb_cred *scred)
770 {
771 return smb_co_get(SSTOCP(ssp), flags, scred);
772 }
773
774 void
775 smb_share_put(struct smb_share *ssp, struct smb_cred *scred)
776 {
777 smb_co_put(SSTOCP(ssp), scred);
778 }
779
780 int
781 smb_share_lock(struct smb_share *ssp, int flags, struct thread *td)
782 {
783 return smb_co_lock(SSTOCP(ssp), flags, td);
784 }
785
786 void
787 smb_share_unlock(struct smb_share *ssp, int flags, struct thread *td)
788 {
789 smb_co_unlock(SSTOCP(ssp), flags, td);
790 }
791
792 int
793 smb_share_access(struct smb_share *ssp, struct smb_cred *scred, mode_t mode)
794 {
795 struct ucred *cred = scred->scr_cred;
796
797 if (smb_suser(cred) == 0 || cred->cr_uid == ssp->ss_uid)
798 return 0;
799 mode >>= 3;
800 if (!groupmember(ssp->ss_grp, cred))
801 mode >>= 3;
802 return (ssp->ss_mode & mode) == mode ? 0 : EACCES;
803 }
804
805 void
806 smb_share_invalidate(struct smb_share *ssp)
807 {
808 ssp->ss_tid = SMB_TID_UNKNOWN;
809 }
810
811 int
812 smb_share_valid(struct smb_share *ssp)
813 {
814 return ssp->ss_tid != SMB_TID_UNKNOWN &&
815 ssp->ss_vcgenid == SSTOVC(ssp)->vc_genid;
816 }
817
818 const char*
819 smb_share_getpass(struct smb_share *ssp)
820 {
821 struct smb_vc *vcp;
822
823 if (ssp->ss_pass)
824 return ssp->ss_pass;
825 vcp = SSTOVC(ssp);
826 if (vcp->vc_pass)
827 return vcp->vc_pass;
828 return smb_emptypass;
829 }
830
831 static int
832 smb_share_getinfo(struct smb_share *ssp, struct smb_share_info *sip)
833 {
834 bzero(sip, sizeof(struct smb_share_info));
835 sip->itype = SMB_INFO_SHARE;
836 sip->usecount = ssp->obj.co_usecount;
837 sip->tid = ssp->ss_tid;
838 sip->type= ssp->ss_type;
839 sip->uid = ssp->ss_uid;
840 sip->gid = ssp->ss_grp;
841 sip->mode= ssp->ss_mode;
842 sip->flags = ssp->obj.co_flags;
843 snprintf(sip->sname, sizeof(sip->sname), "%s", ssp->ss_name);
844 return 0;
845 }
846
847 /*
848 * Dump an entire tree into sysctl call
849 */
850 static int
851 smb_sysctl_treedump(SYSCTL_HANDLER_ARGS)
852 {
853 struct thread *td = req->td;
854 struct smb_cred scred;
855 struct smb_connobj *scp1, *scp2;
856 struct smb_vc *vcp;
857 struct smb_share *ssp;
858 struct smb_vc_info vci;
859 struct smb_share_info ssi;
860 int error, itype;
861
862 smb_makescred(&scred, td, td->td_ucred);
863 error = sysctl_wire_old_buffer(req, 0);
864 if (error)
865 return (error);
866 error = smb_sm_lockvclist(LK_SHARED, td);
867 if (error)
868 return error;
869 SMBCO_FOREACH(scp1, &smb_vclist) {
870 vcp = (struct smb_vc *)scp1;
871 error = smb_vc_lock(vcp, LK_SHARED, td);
872 if (error)
873 continue;
874 smb_vc_getinfo(vcp, &vci);
875 error = SYSCTL_OUT(req, &vci, sizeof(struct smb_vc_info));
876 if (error) {
877 smb_vc_unlock(vcp, 0, td);
878 break;
879 }
880 SMBCO_FOREACH(scp2, VCTOCP(vcp)) {
881 ssp = (struct smb_share *)scp2;
882 error = smb_share_lock(ssp, LK_SHARED, td);
883 if (error) {
884 error = 0;
885 continue;
886 }
887 smb_share_getinfo(ssp, &ssi);
888 smb_share_unlock(ssp, 0, td);
889 error = SYSCTL_OUT(req, &ssi, sizeof(struct smb_share_info));
890 if (error)
891 break;
892 }
893 smb_vc_unlock(vcp, 0, td);
894 if (error)
895 break;
896 }
897 if (!error) {
898 itype = SMB_INFO_NONE;
899 error = SYSCTL_OUT(req, &itype, sizeof(itype));
900 }
901 smb_sm_unlockvclist(td);
902 return error;
903 }
Cache object: d4527e88078af7aaa06bdfa66bd644be
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