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 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 /*
28 * Connection engine.
29 */
30
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
33
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/kernel.h>
37 #include <sys/malloc.h>
38 #include <sys/priv.h>
39 #include <sys/proc.h>
40 #include <sys/lock.h>
41 #include <sys/sysctl.h>
42 #include <sys/socketvar.h>
43
44 #include <sys/iconv.h>
45
46 #include <netsmb/smb.h>
47 #include <netsmb/smb_subr.h>
48 #include <netsmb/smb_conn.h>
49 #include <netsmb/smb_tran.h>
50 #include <netsmb/smb_trantcp.h>
51
52 static struct smb_connobj smb_vclist;
53 static int smb_vcnext = 1; /* next unique id for VC */
54
55 SYSCTL_NODE(_net, OID_AUTO, smb, CTLFLAG_RW, NULL, "SMB protocol");
56
57 static MALLOC_DEFINE(M_SMBCONN, "smb_conn", "SMB connection");
58
59 static void smb_co_init(struct smb_connobj *cp, int level, char *ilockname,
60 char *lockname);
61 static void smb_co_done(struct smb_connobj *cp);
62 static int smb_co_lockstatus(struct smb_connobj *cp);
63
64 static int smb_vc_disconnect(struct smb_vc *vcp);
65 static void smb_vc_free(struct smb_connobj *cp);
66 static void smb_vc_gone(struct smb_connobj *cp, struct smb_cred *scred);
67 static smb_co_free_t smb_share_free;
68 static smb_co_gone_t smb_share_gone;
69
70 static int smb_sysctl_treedump(SYSCTL_HANDLER_ARGS);
71
72 SYSCTL_PROC(_net_smb, OID_AUTO, treedump, CTLFLAG_RD | CTLTYPE_OPAQUE,
73 NULL, 0, smb_sysctl_treedump, "S,treedump", "Requester tree");
74
75 int
76 smb_sm_init(void)
77 {
78
79 smb_co_init(&smb_vclist, SMBL_SM, "smbsm ilock", "smbsm");
80 smb_co_unlock(&smb_vclist, 0);
81 return 0;
82 }
83
84 int
85 smb_sm_done(void)
86 {
87
88 /* XXX: hold the mutex */
89 if (smb_vclist.co_usecount > 1) {
90 SMBERROR("%d connections still active\n", smb_vclist.co_usecount - 1);
91 return EBUSY;
92 }
93 lockmgr(&smb_vclist.co_lock, LK_DRAIN, NULL);
94 smb_co_done(&smb_vclist);
95 return 0;
96 }
97
98 static int
99 smb_sm_lockvclist(int flags)
100 {
101
102 return smb_co_lock(&smb_vclist, flags | LK_CANRECURSE);
103 }
104
105 static void
106 smb_sm_unlockvclist(void)
107 {
108
109 smb_co_unlock(&smb_vclist, LK_RELEASE);
110 }
111
112 static int
113 smb_sm_lookupint(struct smb_vcspec *vcspec, struct smb_sharespec *shspec,
114 struct smb_cred *scred, struct smb_vc **vcpp)
115 {
116 struct smb_connobj *scp;
117 struct smb_vc *vcp;
118 int exact = 1;
119 int error;
120
121 vcspec->shspec = shspec;
122 error = ENOENT;
123 vcp = NULL;
124 SMBCO_FOREACH(scp, &smb_vclist) {
125 vcp = (struct smb_vc *)scp;
126 error = smb_vc_lock(vcp, LK_EXCLUSIVE);
127 if (error)
128 continue;
129
130 if ((vcp->obj.co_flags & SMBV_PRIVATE) ||
131 !CONNADDREQ(vcp->vc_paddr, vcspec->sap) ||
132 strcmp(vcp->vc_username, vcspec->username) != 0)
133 goto err1;
134 if (vcspec->owner != SMBM_ANY_OWNER) {
135 if (vcp->vc_uid != vcspec->owner)
136 goto err1;
137 } else
138 exact = 0;
139 if (vcspec->group != SMBM_ANY_GROUP) {
140 if (vcp->vc_grp != vcspec->group)
141 goto err1;
142 } else
143 exact = 0;
144 if (vcspec->mode & SMBM_EXACT) {
145 if (!exact || (vcspec->mode & SMBM_MASK) !=
146 vcp->vc_mode)
147 goto err1;
148 }
149 if (smb_vc_access(vcp, scred, vcspec->mode) != 0)
150 goto err1;
151 vcspec->ssp = NULL;
152 if (shspec) {
153 error = (int)smb_vc_lookupshare(vcp, shspec, scred,
154 &vcspec->ssp);
155 if (error)
156 goto fail;
157 }
158 error = 0;
159 break;
160 err1:
161 error = 1;
162 fail:
163 smb_vc_unlock(vcp, 0);
164 }
165 if (vcp) {
166 smb_vc_ref(vcp);
167 *vcpp = vcp;
168 }
169 return (error);
170 }
171
172 int
173 smb_sm_lookup(struct smb_vcspec *vcspec, struct smb_sharespec *shspec,
174 struct smb_cred *scred, struct smb_vc **vcpp)
175 {
176 struct smb_vc *vcp;
177 struct smb_share *ssp = NULL;
178 int error;
179
180 *vcpp = vcp = NULL;
181
182 error = smb_sm_lockvclist(LK_EXCLUSIVE);
183 if (error)
184 return error;
185 error = smb_sm_lookupint(vcspec, shspec, scred, vcpp);
186 if (error == 0 || (vcspec->flags & SMBV_CREATE) == 0) {
187 smb_sm_unlockvclist();
188 return error;
189 }
190 error = smb_sm_lookupint(vcspec, NULL, scred, &vcp);
191 if (error) {
192 error = smb_vc_create(vcspec, scred, &vcp);
193 if (error)
194 goto out;
195 error = smb_vc_connect(vcp, scred);
196 if (error)
197 goto out;
198 }
199 if (shspec == NULL)
200 goto out;
201 error = smb_share_create(vcp, shspec, scred, &ssp);
202 if (error)
203 goto out;
204 error = smb_smb_treeconnect(ssp, scred);
205 if (error == 0)
206 vcspec->ssp = ssp;
207 else
208 smb_share_put(ssp, scred);
209 out:
210 smb_sm_unlockvclist();
211 if (error == 0)
212 *vcpp = vcp;
213 else if (vcp) {
214 smb_vc_lock(vcp, LK_EXCLUSIVE);
215 smb_vc_put(vcp, scred);
216 }
217 return error;
218 }
219
220 /*
221 * Common code for connection object
222 */
223 static void
224 smb_co_init(struct smb_connobj *cp, int level, char *ilockname, char *lockname)
225 {
226 SLIST_INIT(&cp->co_children);
227 smb_sl_init(&cp->co_interlock, ilockname);
228 lockinit(&cp->co_lock, PZERO, lockname, 0, 0);
229 cp->co_level = level;
230 cp->co_usecount = 1;
231 if (smb_co_lock(cp, LK_EXCLUSIVE) != 0)
232 panic("smb_co_init: lock failed");
233 }
234
235 static void
236 smb_co_done(struct smb_connobj *cp)
237 {
238 smb_sl_destroy(&cp->co_interlock);
239 lockmgr(&cp->co_lock, LK_RELEASE, NULL);
240 lockdestroy(&cp->co_lock);
241 }
242
243 static void
244 smb_co_gone(struct smb_connobj *cp, struct smb_cred *scred)
245 {
246 struct smb_connobj *parent;
247
248 if (cp->co_gone)
249 cp->co_gone(cp, scred);
250 parent = cp->co_parent;
251 if (parent) {
252 smb_co_lock(parent, LK_EXCLUSIVE);
253 SLIST_REMOVE(&parent->co_children, cp, smb_connobj, co_next);
254 smb_co_put(parent, scred);
255 }
256 if (cp->co_free)
257 cp->co_free(cp);
258 }
259
260 void
261 smb_co_ref(struct smb_connobj *cp)
262 {
263
264 SMB_CO_LOCK(cp);
265 cp->co_usecount++;
266 SMB_CO_UNLOCK(cp);
267 }
268
269 void
270 smb_co_rele(struct smb_connobj *cp, struct smb_cred *scred)
271 {
272
273 SMB_CO_LOCK(cp);
274 if (cp->co_usecount > 1) {
275 cp->co_usecount--;
276 SMB_CO_UNLOCK(cp);
277 return;
278 }
279 if (cp->co_usecount == 0) {
280 SMBERROR("negative use_count for object %d", cp->co_level);
281 SMB_CO_UNLOCK(cp);
282 return;
283 }
284 cp->co_usecount--;
285 cp->co_flags |= SMBO_GONE;
286
287 lockmgr(&cp->co_lock, LK_DRAIN | LK_INTERLOCK, &cp->co_interlock);
288 smb_co_gone(cp, scred);
289 }
290
291 int
292 smb_co_get(struct smb_connobj *cp, int flags, struct smb_cred *scred)
293 {
294 int error;
295
296 if ((flags & LK_INTERLOCK) == 0)
297 SMB_CO_LOCK(cp);
298 cp->co_usecount++;
299 error = smb_co_lock(cp, flags | LK_INTERLOCK);
300 if (error) {
301 SMB_CO_LOCK(cp);
302 cp->co_usecount--;
303 SMB_CO_UNLOCK(cp);
304 return error;
305 }
306 return 0;
307 }
308
309 void
310 smb_co_put(struct smb_connobj *cp, struct smb_cred *scred)
311 {
312
313 SMB_CO_LOCK(cp);
314 if (cp->co_usecount > 1) {
315 cp->co_usecount--;
316 } else if (cp->co_usecount == 1) {
317 cp->co_usecount--;
318 cp->co_flags |= SMBO_GONE;
319 } else {
320 SMBERROR("negative usecount");
321 }
322 lockmgr(&cp->co_lock, LK_RELEASE | LK_INTERLOCK, &cp->co_interlock);
323 if ((cp->co_flags & SMBO_GONE) == 0)
324 return;
325 lockmgr(&cp->co_lock, LK_DRAIN, NULL);
326 smb_co_gone(cp, scred);
327 }
328
329 int
330 smb_co_lockstatus(struct smb_connobj *cp)
331 {
332 return lockstatus(&cp->co_lock);
333 }
334
335 int
336 smb_co_lock(struct smb_connobj *cp, int flags)
337 {
338
339 if (cp->co_flags & SMBO_GONE)
340 return EINVAL;
341 if ((flags & LK_TYPE_MASK) == 0)
342 flags |= LK_EXCLUSIVE;
343 if (smb_co_lockstatus(cp) == LK_EXCLUSIVE &&
344 (flags & LK_CANRECURSE) == 0) {
345 SMBERROR("recursive lock for object %d\n", cp->co_level);
346 return 0;
347 }
348 return lockmgr(&cp->co_lock, flags, &cp->co_interlock);
349 }
350
351 void
352 smb_co_unlock(struct smb_connobj *cp, int flags)
353 {
354 (void)lockmgr(&cp->co_lock, flags | LK_RELEASE, &cp->co_interlock);
355 }
356
357 static void
358 smb_co_addchild(struct smb_connobj *parent, struct smb_connobj *child)
359 {
360
361 KASSERT(smb_co_lockstatus(parent) == LK_EXCLUSIVE,
362 ("smb_co_addchild: parent not locked"));
363 KASSERT(smb_co_lockstatus(child) == LK_EXCLUSIVE,
364 ("smb_co_addchild: child not locked"));
365
366 smb_co_ref(parent);
367 SLIST_INSERT_HEAD(&parent->co_children, child, co_next);
368 child->co_parent = parent;
369 }
370
371 /*
372 * Session implementation
373 */
374
375 int
376 smb_vc_create(struct smb_vcspec *vcspec,
377 struct smb_cred *scred, struct smb_vc **vcpp)
378 {
379 struct smb_vc *vcp;
380 struct ucred *cred = scred->scr_cred;
381 uid_t uid = vcspec->owner;
382 gid_t gid = vcspec->group;
383 uid_t realuid = cred->cr_uid;
384 char *domain = vcspec->domain;
385 int error, isroot;
386
387 isroot = smb_suser(cred) == 0;
388 /*
389 * Only superuser can create VCs with different uid and gid
390 */
391 if (uid != SMBM_ANY_OWNER && uid != realuid && !isroot)
392 return EPERM;
393 if (gid != SMBM_ANY_GROUP && !groupmember(gid, cred) && !isroot)
394 return EPERM;
395
396 vcp = smb_zmalloc(sizeof(*vcp), M_SMBCONN, M_WAITOK);
397 smb_co_init(VCTOCP(vcp), SMBL_VC, "smb_vc ilock", "smb_vc");
398 vcp->obj.co_free = smb_vc_free;
399 vcp->obj.co_gone = smb_vc_gone;
400 vcp->vc_number = smb_vcnext++;
401 vcp->vc_timo = SMB_DEFRQTIMO;
402 vcp->vc_smbuid = SMB_UID_UNKNOWN;
403 vcp->vc_mode = vcspec->rights & SMBM_MASK;
404 vcp->obj.co_flags = vcspec->flags & (SMBV_PRIVATE | SMBV_SINGLESHARE);
405 vcp->vc_tdesc = &smb_tran_nbtcp_desc;
406 vcp->vc_seqno = 0;
407 vcp->vc_mackey = NULL;
408 vcp->vc_mackeylen = 0;
409
410 if (uid == SMBM_ANY_OWNER)
411 uid = realuid;
412 if (gid == SMBM_ANY_GROUP)
413 gid = cred->cr_groups[0];
414 vcp->vc_uid = uid;
415 vcp->vc_grp = gid;
416
417 smb_sl_init(&vcp->vc_stlock, "vcstlock");
418 error = ENOMEM;
419
420 vcp->vc_paddr = sodupsockaddr(vcspec->sap, M_WAITOK);
421 if (vcp->vc_paddr == NULL)
422 goto fail;
423 vcp->vc_laddr = sodupsockaddr(vcspec->lap, M_WAITOK);
424 if (vcp->vc_laddr == NULL)
425 goto fail;
426 vcp->vc_pass = smb_strdup(vcspec->pass);
427 if (vcp->vc_pass == NULL)
428 goto fail;
429 vcp->vc_domain = smb_strdup((domain && domain[0]) ? domain :
430 "NODOMAIN");
431 if (vcp->vc_domain == NULL)
432 goto fail;
433 vcp->vc_srvname = smb_strdup(vcspec->srvname);
434 if (vcp->vc_srvname == NULL)
435 goto fail;
436 vcp->vc_username = smb_strdup(vcspec->username);
437 if (vcp->vc_username == NULL)
438 goto fail;
439 error = (int)iconv_open("tolower", vcspec->localcs, &vcp->vc_tolower);
440 if (error)
441 goto fail;
442 error = (int)iconv_open("toupper", vcspec->localcs, &vcp->vc_toupper);
443 if (error)
444 goto fail;
445 if (vcspec->servercs[0]) {
446 error = (int)iconv_open(vcspec->servercs, vcspec->localcs,
447 &vcp->vc_cp_toserver);
448 if (error)
449 goto fail;
450 error = (int)iconv_open(vcspec->localcs, vcspec->servercs,
451 &vcp->vc_cp_tolocal);
452 if (error)
453 goto fail;
454 vcp->vc_toserver = vcp->vc_cp_toserver;
455 vcp->vc_tolocal = vcp->vc_cp_tolocal;
456 iconv_add(ENCODING_UNICODE, ENCODING_UNICODE, SMB_UNICODE_NAME);
457 iconv_add(ENCODING_UNICODE, SMB_UNICODE_NAME, ENCODING_UNICODE);
458 error = (int)iconv_open(SMB_UNICODE_NAME, vcspec->localcs,
459 &vcp->vc_ucs_toserver);
460 if (!error) {
461 error = (int)iconv_open(vcspec->localcs, SMB_UNICODE_NAME,
462 &vcp->vc_ucs_tolocal);
463 }
464 if (error) {
465 if (vcp->vc_ucs_toserver)
466 iconv_close(vcp->vc_ucs_toserver);
467 vcp->vc_ucs_toserver = NULL;
468 vcp->vc_ucs_tolocal = NULL;
469 }
470 }
471 error = (int)smb_iod_create(vcp);
472 if (error)
473 goto fail;
474 *vcpp = vcp;
475 smb_co_addchild(&smb_vclist, VCTOCP(vcp));
476 return (0);
477
478 fail:
479 smb_vc_put(vcp, scred);
480 return (error);
481 }
482
483 static void
484 smb_vc_free(struct smb_connobj *cp)
485 {
486 struct smb_vc *vcp = CPTOVC(cp);
487
488 if (vcp->vc_iod)
489 smb_iod_destroy(vcp->vc_iod);
490 SMB_STRFREE(vcp->vc_username);
491 SMB_STRFREE(vcp->vc_srvname);
492 SMB_STRFREE(vcp->vc_pass);
493 SMB_STRFREE(vcp->vc_domain);
494 if (vcp->vc_mackey)
495 free(vcp->vc_mackey, M_SMBTEMP);
496 if (vcp->vc_paddr)
497 free(vcp->vc_paddr, M_SONAME);
498 if (vcp->vc_laddr)
499 free(vcp->vc_laddr, M_SONAME);
500 if (vcp->vc_tolower)
501 iconv_close(vcp->vc_tolower);
502 if (vcp->vc_toupper)
503 iconv_close(vcp->vc_toupper);
504 if (vcp->vc_tolocal)
505 vcp->vc_tolocal = NULL;
506 if (vcp->vc_toserver)
507 vcp->vc_toserver = NULL;
508 if (vcp->vc_cp_tolocal)
509 iconv_close(vcp->vc_cp_tolocal);
510 if (vcp->vc_cp_toserver)
511 iconv_close(vcp->vc_cp_toserver);
512 if (vcp->vc_ucs_tolocal)
513 iconv_close(vcp->vc_ucs_tolocal);
514 if (vcp->vc_ucs_toserver)
515 iconv_close(vcp->vc_ucs_toserver);
516 smb_co_done(VCTOCP(vcp));
517 smb_sl_destroy(&vcp->vc_stlock);
518 free(vcp, M_SMBCONN);
519 }
520
521 /*
522 * Called when use count of VC dropped to zero.
523 * VC should be locked on enter with LK_DRAIN.
524 */
525 static void
526 smb_vc_gone(struct smb_connobj *cp, struct smb_cred *scred)
527 {
528 struct smb_vc *vcp = CPTOVC(cp);
529
530 smb_vc_disconnect(vcp);
531 }
532
533 void
534 smb_vc_ref(struct smb_vc *vcp)
535 {
536 smb_co_ref(VCTOCP(vcp));
537 }
538
539 void
540 smb_vc_rele(struct smb_vc *vcp, struct smb_cred *scred)
541 {
542 smb_co_rele(VCTOCP(vcp), scred);
543 }
544
545 int
546 smb_vc_get(struct smb_vc *vcp, int flags, struct smb_cred *scred)
547 {
548 return smb_co_get(VCTOCP(vcp), flags, scred);
549 }
550
551 void
552 smb_vc_put(struct smb_vc *vcp, struct smb_cred *scred)
553 {
554 smb_co_put(VCTOCP(vcp), scred);
555 }
556
557 int
558 smb_vc_lock(struct smb_vc *vcp, int flags)
559 {
560 return smb_co_lock(VCTOCP(vcp), flags);
561 }
562
563 void
564 smb_vc_unlock(struct smb_vc *vcp, int flags)
565 {
566 smb_co_unlock(VCTOCP(vcp), flags);
567 }
568
569 int
570 smb_vc_access(struct smb_vc *vcp, struct smb_cred *scred, mode_t mode)
571 {
572 struct ucred *cred = scred->scr_cred;
573
574 if (smb_suser(cred) == 0 || cred->cr_uid == vcp->vc_uid)
575 return 0;
576 mode >>= 3;
577 if (!groupmember(vcp->vc_grp, cred))
578 mode >>= 3;
579 return (vcp->vc_mode & mode) == mode ? 0 : EACCES;
580 }
581
582 static int
583 smb_vc_cmpshare(struct smb_share *ssp, struct smb_sharespec *dp)
584 {
585 int exact = 1;
586
587 if (strcmp(ssp->ss_name, dp->name) != 0)
588 return 1;
589 if (dp->owner != SMBM_ANY_OWNER) {
590 if (ssp->ss_uid != dp->owner)
591 return 1;
592 } else
593 exact = 0;
594 if (dp->group != SMBM_ANY_GROUP) {
595 if (ssp->ss_grp != dp->group)
596 return 1;
597 } else
598 exact = 0;
599
600 if (dp->mode & SMBM_EXACT) {
601 if (!exact)
602 return 1;
603 return (dp->mode & SMBM_MASK) == ssp->ss_mode ? 0 : 1;
604 }
605 if (smb_share_access(ssp, dp->scred, dp->mode) != 0)
606 return 1;
607 return 0;
608 }
609
610 /*
611 * Lookup share in the given VC. Share referenced and locked on return.
612 * VC expected to be locked on entry and will be left locked on exit.
613 */
614 int
615 smb_vc_lookupshare(struct smb_vc *vcp, struct smb_sharespec *dp,
616 struct smb_cred *scred, struct smb_share **sspp)
617 {
618 struct smb_connobj *scp = NULL;
619 struct smb_share *ssp = NULL;
620 int error;
621
622 *sspp = NULL;
623 dp->scred = scred;
624 SMBCO_FOREACH(scp, VCTOCP(vcp)) {
625 ssp = (struct smb_share *)scp;
626 error = smb_share_lock(ssp, LK_EXCLUSIVE);
627 if (error)
628 continue;
629 if (smb_vc_cmpshare(ssp, dp) == 0)
630 break;
631 smb_share_unlock(ssp, 0);
632 }
633 if (ssp) {
634 smb_share_ref(ssp);
635 *sspp = ssp;
636 error = 0;
637 } else
638 error = ENOENT;
639 return error;
640 }
641
642 int
643 smb_vc_connect(struct smb_vc *vcp, struct smb_cred *scred)
644 {
645
646 return smb_iod_request(vcp->vc_iod, SMBIOD_EV_CONNECT | SMBIOD_EV_SYNC, NULL);
647 }
648
649 /*
650 * Destroy VC to server, invalidate shares linked with it.
651 * Transport should be locked on entry.
652 */
653 int
654 smb_vc_disconnect(struct smb_vc *vcp)
655 {
656
657 if (vcp->vc_iod != NULL)
658 smb_iod_request(vcp->vc_iod, SMBIOD_EV_DISCONNECT |
659 SMBIOD_EV_SYNC, NULL);
660 return 0;
661 }
662
663 static char smb_emptypass[] = "";
664
665 const char *
666 smb_vc_getpass(struct smb_vc *vcp)
667 {
668 if (vcp->vc_pass)
669 return vcp->vc_pass;
670 return smb_emptypass;
671 }
672
673 static int
674 smb_vc_getinfo(struct smb_vc *vcp, struct smb_vc_info *vip)
675 {
676 bzero(vip, sizeof(struct smb_vc_info));
677 vip->itype = SMB_INFO_VC;
678 vip->usecount = vcp->obj.co_usecount;
679 vip->uid = vcp->vc_uid;
680 vip->gid = vcp->vc_grp;
681 vip->mode = vcp->vc_mode;
682 vip->flags = vcp->obj.co_flags;
683 vip->sopt = vcp->vc_sopt;
684 vip->iodstate = vcp->vc_iod->iod_state;
685 bzero(&vip->sopt.sv_skey, sizeof(vip->sopt.sv_skey));
686 snprintf(vip->srvname, sizeof(vip->srvname), "%s", vcp->vc_srvname);
687 snprintf(vip->vcname, sizeof(vip->vcname), "%s", vcp->vc_username);
688 return 0;
689 }
690
691 u_short
692 smb_vc_nextmid(struct smb_vc *vcp)
693 {
694 u_short r;
695
696 SMB_CO_LOCK(&vcp->obj);
697 r = vcp->vc_mid++;
698 SMB_CO_UNLOCK(&vcp->obj);
699 return r;
700 }
701
702 /*
703 * Share implementation
704 */
705 /*
706 * Allocate share structure and attach it to the given VC
707 * Connection expected to be locked on entry. Share will be returned
708 * in locked state.
709 */
710 int
711 smb_share_create(struct smb_vc *vcp, struct smb_sharespec *shspec,
712 struct smb_cred *scred, struct smb_share **sspp)
713 {
714 struct smb_share *ssp;
715 struct ucred *cred = scred->scr_cred;
716 uid_t realuid = cred->cr_uid;
717 uid_t uid = shspec->owner;
718 gid_t gid = shspec->group;
719 int error, isroot;
720
721 isroot = smb_suser(cred) == 0;
722 /*
723 * Only superuser can create shares with different uid and gid
724 */
725 if (uid != SMBM_ANY_OWNER && uid != realuid && !isroot)
726 return EPERM;
727 if (gid != SMBM_ANY_GROUP && !groupmember(gid, cred) && !isroot)
728 return EPERM;
729 error = smb_vc_lookupshare(vcp, shspec, scred, &ssp);
730 if (!error) {
731 smb_share_put(ssp, scred);
732 return EEXIST;
733 }
734 if (uid == SMBM_ANY_OWNER)
735 uid = realuid;
736 if (gid == SMBM_ANY_GROUP)
737 gid = cred->cr_groups[0];
738 ssp = smb_zmalloc(sizeof(*ssp), M_SMBCONN, M_WAITOK);
739 smb_co_init(SSTOCP(ssp), SMBL_SHARE, "smbss ilock", "smbss");
740 ssp->obj.co_free = smb_share_free;
741 ssp->obj.co_gone = smb_share_gone;
742 smb_sl_init(&ssp->ss_stlock, "ssstlock");
743 ssp->ss_name = smb_strdup(shspec->name);
744 if (shspec->pass && shspec->pass[0])
745 ssp->ss_pass = smb_strdup(shspec->pass);
746 ssp->ss_type = shspec->stype;
747 ssp->ss_tid = SMB_TID_UNKNOWN;
748 ssp->ss_uid = uid;
749 ssp->ss_grp = gid;
750 ssp->ss_mode = shspec->rights & SMBM_MASK;
751 smb_co_addchild(VCTOCP(vcp), SSTOCP(ssp));
752 *sspp = ssp;
753 return 0;
754 }
755
756 static void
757 smb_share_free(struct smb_connobj *cp)
758 {
759 struct smb_share *ssp = CPTOSS(cp);
760
761 SMB_STRFREE(ssp->ss_name);
762 SMB_STRFREE(ssp->ss_pass);
763 smb_sl_destroy(&ssp->ss_stlock);
764 smb_co_done(SSTOCP(ssp));
765 free(ssp, M_SMBCONN);
766 }
767
768 static void
769 smb_share_gone(struct smb_connobj *cp, struct smb_cred *scred)
770 {
771 struct smb_share *ssp = CPTOSS(cp);
772
773 smb_smb_treedisconnect(ssp, scred);
774 }
775
776 void
777 smb_share_ref(struct smb_share *ssp)
778 {
779 smb_co_ref(SSTOCP(ssp));
780 }
781
782 void
783 smb_share_rele(struct smb_share *ssp, struct smb_cred *scred)
784 {
785 smb_co_rele(SSTOCP(ssp), scred);
786 }
787
788 int
789 smb_share_get(struct smb_share *ssp, int flags, struct smb_cred *scred)
790 {
791 return smb_co_get(SSTOCP(ssp), flags, scred);
792 }
793
794 void
795 smb_share_put(struct smb_share *ssp, struct smb_cred *scred)
796 {
797 smb_co_put(SSTOCP(ssp), scred);
798 }
799
800 int
801 smb_share_lock(struct smb_share *ssp, int flags)
802 {
803 return smb_co_lock(SSTOCP(ssp), flags);
804 }
805
806 void
807 smb_share_unlock(struct smb_share *ssp, int flags)
808 {
809 smb_co_unlock(SSTOCP(ssp), flags);
810 }
811
812 int
813 smb_share_access(struct smb_share *ssp, struct smb_cred *scred, mode_t mode)
814 {
815 struct ucred *cred = scred->scr_cred;
816
817 if (smb_suser(cred) == 0 || cred->cr_uid == ssp->ss_uid)
818 return 0;
819 mode >>= 3;
820 if (!groupmember(ssp->ss_grp, cred))
821 mode >>= 3;
822 return (ssp->ss_mode & mode) == mode ? 0 : EACCES;
823 }
824
825 void
826 smb_share_invalidate(struct smb_share *ssp)
827 {
828 ssp->ss_tid = SMB_TID_UNKNOWN;
829 }
830
831 int
832 smb_share_valid(struct smb_share *ssp)
833 {
834 return ssp->ss_tid != SMB_TID_UNKNOWN &&
835 ssp->ss_vcgenid == SSTOVC(ssp)->vc_genid;
836 }
837
838 const char*
839 smb_share_getpass(struct smb_share *ssp)
840 {
841 struct smb_vc *vcp;
842
843 if (ssp->ss_pass)
844 return ssp->ss_pass;
845 vcp = SSTOVC(ssp);
846 if (vcp->vc_pass)
847 return vcp->vc_pass;
848 return smb_emptypass;
849 }
850
851 static int
852 smb_share_getinfo(struct smb_share *ssp, struct smb_share_info *sip)
853 {
854 bzero(sip, sizeof(struct smb_share_info));
855 sip->itype = SMB_INFO_SHARE;
856 sip->usecount = ssp->obj.co_usecount;
857 sip->tid = ssp->ss_tid;
858 sip->type= ssp->ss_type;
859 sip->uid = ssp->ss_uid;
860 sip->gid = ssp->ss_grp;
861 sip->mode= ssp->ss_mode;
862 sip->flags = ssp->obj.co_flags;
863 snprintf(sip->sname, sizeof(sip->sname), "%s", ssp->ss_name);
864 return 0;
865 }
866
867 /*
868 * Dump an entire tree into sysctl call
869 */
870 static int
871 smb_sysctl_treedump(SYSCTL_HANDLER_ARGS)
872 {
873 struct thread *td = req->td;
874 struct smb_cred scred;
875 struct smb_connobj *scp1, *scp2;
876 struct smb_vc *vcp;
877 struct smb_share *ssp;
878 struct smb_vc_info vci;
879 struct smb_share_info ssi;
880 int error, itype;
881
882 smb_makescred(&scred, td, td->td_ucred);
883 error = sysctl_wire_old_buffer(req, 0);
884 if (error)
885 return (error);
886 error = smb_sm_lockvclist(LK_SHARED);
887 if (error)
888 return error;
889 SMBCO_FOREACH(scp1, &smb_vclist) {
890 vcp = (struct smb_vc *)scp1;
891 error = smb_vc_lock(vcp, LK_SHARED);
892 if (error)
893 continue;
894 smb_vc_getinfo(vcp, &vci);
895 error = SYSCTL_OUT(req, &vci, sizeof(struct smb_vc_info));
896 if (error) {
897 smb_vc_unlock(vcp, 0);
898 break;
899 }
900 SMBCO_FOREACH(scp2, VCTOCP(vcp)) {
901 ssp = (struct smb_share *)scp2;
902 error = smb_share_lock(ssp, LK_SHARED);
903 if (error) {
904 error = 0;
905 continue;
906 }
907 smb_share_getinfo(ssp, &ssi);
908 smb_share_unlock(ssp, 0);
909 error = SYSCTL_OUT(req, &ssi, sizeof(struct smb_share_info));
910 if (error)
911 break;
912 }
913 smb_vc_unlock(vcp, 0);
914 if (error)
915 break;
916 }
917 if (!error) {
918 itype = SMB_INFO_NONE;
919 error = SYSCTL_OUT(req, &itype, sizeof(itype));
920 }
921 smb_sm_unlockvclist();
922 return error;
923 }
Cache object: 2a1487597fd6fc2b20ebf8335db7cece
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