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 2015 Nexenta Systems, Inc. All rights reserved.
24 */
25
26 #include <sys/sid.h>
27 #include <sys/nbmlock.h>
28 #include <smbsrv/smb_fsops.h>
29 #include <smbsrv/smb_kproto.h>
30 #include <acl/acl_common.h>
31 #include <sys/fcntl.h>
32 #include <sys/flock.h>
33 #include <fs/fs_subr.h>
34
35 extern caller_context_t smb_ct;
36
37 static int smb_fsop_create_stream(smb_request_t *, cred_t *, smb_node_t *,
38 char *, char *, int, smb_attr_t *, smb_node_t **);
39
40 static int smb_fsop_create_file(smb_request_t *, cred_t *, smb_node_t *,
41 char *, int, smb_attr_t *, smb_node_t **);
42
43 #ifdef _KERNEL
44 static int smb_fsop_create_with_sd(smb_request_t *, cred_t *, smb_node_t *,
45 char *, smb_attr_t *, smb_node_t **, smb_fssd_t *);
46 static int smb_fsop_sdinherit(smb_request_t *, smb_node_t *, smb_fssd_t *);
47 #endif /* _KERNEL */
48
49 /*
50 * The smb_fsop_* functions have knowledge of CIFS semantics.
51 *
52 * The smb_vop_* functions have minimal knowledge of CIFS semantics and
53 * serve as an interface to the VFS layer.
54 *
55 * Hence, smb_request_t and smb_node_t structures should not be passed
56 * from the smb_fsop_* layer to the smb_vop_* layer.
57 *
58 * In general, CIFS service code should only ever call smb_fsop_*
59 * functions directly, and never smb_vop_* functions directly.
60 *
61 * smb_fsop_* functions should call smb_vop_* functions where possible, instead
62 * of their smb_fsop_* counterparts. However, there are times when
63 * this cannot be avoided.
64 */
65
66 /*
67 * Note: Stream names cannot be mangled.
68 */
69
70 /*
71 * smb_fsop_amask_to_omode
72 *
73 * Convert the access mask to the open mode (for use
74 * with the VOP_OPEN call).
75 *
76 * Note that opening a file for attribute only access
77 * will also translate into an FREAD or FWRITE open mode
78 * (i.e., it's not just for data).
79 *
80 * This is needed so that opens are tracked appropriately
81 * for oplock processing.
82 */
83
84 int
85 smb_fsop_amask_to_omode(uint32_t access)
86 {
87 int mode = 0;
88
89 if (access & (FILE_READ_DATA | FILE_EXECUTE |
90 FILE_READ_ATTRIBUTES | FILE_READ_EA))
91 mode |= FREAD;
92
93 if (access & (FILE_WRITE_DATA | FILE_APPEND_DATA |
94 FILE_WRITE_ATTRIBUTES | FILE_WRITE_EA))
95 mode |= FWRITE;
96
97 if (access & FILE_APPEND_DATA)
98 mode |= FAPPEND;
99
100 return (mode);
101 }
102
103 int
104 smb_fsop_open(smb_node_t *node, int mode, cred_t *cred)
105 {
106 /*
107 * Assuming that the same vnode is returned as we had before.
108 * (I.e., with certain types of files or file systems, a
109 * different vnode might be returned by VOP_OPEN)
110 */
111 return (smb_vop_open(&node->vp, mode, cred));
112 }
113
114 void
115 smb_fsop_close(smb_node_t *node, int mode, cred_t *cred)
116 {
117 smb_vop_close(node->vp, mode, cred);
118 }
119
120 #ifdef _KERNEL
121 static int
122 smb_fsop_create_with_sd(smb_request_t *sr, cred_t *cr,
123 smb_node_t *dnode, char *name,
124 smb_attr_t *attr, smb_node_t **ret_snode, smb_fssd_t *fs_sd)
125 {
126 vsecattr_t *vsap;
127 vsecattr_t vsecattr;
128 smb_attr_t set_attr;
129 acl_t *acl, *dacl, *sacl;
130 vnode_t *vp;
131 cred_t *kcr = zone_kcred();
132 int aclbsize = 0; /* size of acl list in bytes */
133 int flags = 0;
134 int rc;
135 boolean_t is_dir;
136
137 ASSERT(fs_sd);
138
139 if (SMB_TREE_IS_CASEINSENSITIVE(sr))
140 flags = SMB_IGNORE_CASE;
141 if (SMB_TREE_SUPPORTS_CATIA(sr))
142 flags |= SMB_CATIA;
143
144 ASSERT(cr);
145
146 is_dir = ((fs_sd->sd_flags & SMB_FSSD_FLAGS_DIR) != 0);
147
148 if (smb_tree_has_feature(sr->tid_tree, SMB_TREE_ACLONCREATE)) {
149 if (fs_sd->sd_secinfo & SMB_ACL_SECINFO) {
150 dacl = fs_sd->sd_zdacl;
151 sacl = fs_sd->sd_zsacl;
152 ASSERT(dacl || sacl);
153 if (dacl && sacl) {
154 acl = smb_fsacl_merge(dacl, sacl);
155 } else if (dacl) {
156 acl = dacl;
157 } else {
158 acl = sacl;
159 }
160
161 rc = smb_fsacl_to_vsa(acl, &vsecattr, &aclbsize);
162
163 if (dacl && sacl)
164 acl_free(acl);
165
166 if (rc != 0)
167 return (rc);
168
169 vsap = &vsecattr;
170 } else {
171 vsap = NULL;
172 }
173
174 /* The tree ACEs may prevent a create */
175 rc = EACCES;
176 if (is_dir) {
177 if (SMB_TREE_HAS_ACCESS(sr, ACE_ADD_SUBDIRECTORY) != 0)
178 rc = smb_vop_mkdir(dnode->vp, name, attr,
179 &vp, flags, cr, vsap);
180 } else {
181 if (SMB_TREE_HAS_ACCESS(sr, ACE_ADD_FILE) != 0)
182 rc = smb_vop_create(dnode->vp, name, attr,
183 &vp, flags, cr, vsap);
184 }
185
186 if (vsap != NULL)
187 kmem_free(vsap->vsa_aclentp, aclbsize);
188
189 if (rc != 0)
190 return (rc);
191
192 set_attr.sa_mask = 0;
193
194 /*
195 * Ideally we should be able to specify the owner and owning
196 * group at create time along with the ACL. Since we cannot
197 * do that right now, kcred is passed to smb_vop_setattr so it
198 * doesn't fail due to lack of permission.
199 */
200 if (fs_sd->sd_secinfo & SMB_OWNER_SECINFO) {
201 set_attr.sa_vattr.va_uid = fs_sd->sd_uid;
202 set_attr.sa_mask |= SMB_AT_UID;
203 }
204
205 if (fs_sd->sd_secinfo & SMB_GROUP_SECINFO) {
206 set_attr.sa_vattr.va_gid = fs_sd->sd_gid;
207 set_attr.sa_mask |= SMB_AT_GID;
208 }
209
210 if (set_attr.sa_mask)
211 rc = smb_vop_setattr(vp, NULL, &set_attr, 0, kcr);
212
213 if (rc == 0) {
214 *ret_snode = smb_node_lookup(sr, &sr->arg.open, cr, vp,
215 name, dnode, NULL);
216
217 if (*ret_snode == NULL)
218 rc = ENOMEM;
219
220 VN_RELE(vp);
221 }
222 } else {
223 /*
224 * For filesystems that don't support ACL-on-create, try
225 * to set the specified SD after create, which could actually
226 * fail because of conflicts between inherited security
227 * attributes upon creation and the specified SD.
228 *
229 * Passing kcred to smb_fsop_sdwrite() to overcome this issue.
230 */
231
232 if (is_dir) {
233 rc = smb_vop_mkdir(dnode->vp, name, attr, &vp,
234 flags, cr, NULL);
235 } else {
236 rc = smb_vop_create(dnode->vp, name, attr, &vp,
237 flags, cr, NULL);
238 }
239
240 if (rc != 0)
241 return (rc);
242
243 *ret_snode = smb_node_lookup(sr, &sr->arg.open, cr, vp,
244 name, dnode, NULL);
245
246 if (*ret_snode != NULL) {
247 if (!smb_tree_has_feature(sr->tid_tree,
248 SMB_TREE_NFS_MOUNTED))
249 rc = smb_fsop_sdwrite(sr, kcr, *ret_snode,
250 fs_sd, 1);
251 } else {
252 rc = ENOMEM;
253 }
254
255 VN_RELE(vp);
256 }
257
258 if (rc != 0) {
259 if (is_dir)
260 (void) smb_vop_rmdir(dnode->vp, name, flags, cr);
261 else
262 (void) smb_vop_remove(dnode->vp, name, flags, cr);
263 }
264
265 return (rc);
266 }
267 #endif /* _KERNEL */
268
269 /*
270 * smb_fsop_create
271 *
272 * All SMB functions should use this wrapper to ensure that
273 * all the smb_vop_creates are performed with the appropriate credentials.
274 * Please document any direct calls to explain the reason for avoiding
275 * this wrapper.
276 *
277 * *ret_snode is returned with a reference upon success. No reference is
278 * taken if an error is returned.
279 */
280 int
281 smb_fsop_create(smb_request_t *sr, cred_t *cr, smb_node_t *dnode,
282 char *name, smb_attr_t *attr, smb_node_t **ret_snode)
283 {
284 int rc = 0;
285 int flags = 0;
286 char *fname, *sname;
287 char *longname = NULL;
288
289 ASSERT(cr);
290 ASSERT(dnode);
291 ASSERT(dnode->n_magic == SMB_NODE_MAGIC);
292 ASSERT(dnode->n_state != SMB_NODE_STATE_DESTROYING);
293
294 ASSERT(ret_snode);
295 *ret_snode = 0;
296
297 ASSERT(name);
298 if (*name == 0)
299 return (EINVAL);
300
301 ASSERT(sr);
302 ASSERT(sr->tid_tree);
303
304 if (SMB_TREE_CONTAINS_NODE(sr, dnode) == 0)
305 return (EACCES);
306
307 if (SMB_TREE_IS_READONLY(sr))
308 return (EROFS);
309
310 if (SMB_TREE_IS_CASEINSENSITIVE(sr))
311 flags = SMB_IGNORE_CASE;
312 if (SMB_TREE_SUPPORTS_CATIA(sr))
313 flags |= SMB_CATIA;
314 if (SMB_TREE_SUPPORTS_ABE(sr))
315 flags |= SMB_ABE;
316
317 if (smb_is_stream_name(name)) {
318 fname = kmem_alloc(MAXNAMELEN, KM_SLEEP);
319 sname = kmem_alloc(MAXNAMELEN, KM_SLEEP);
320 smb_stream_parse_name(name, fname, sname);
321
322 rc = smb_fsop_create_stream(sr, cr, dnode,
323 fname, sname, flags, attr, ret_snode);
324
325 kmem_free(fname, MAXNAMELEN);
326 kmem_free(sname, MAXNAMELEN);
327 return (rc);
328 }
329
330 /* Not a named stream */
331
332 if (SMB_TREE_SUPPORTS_SHORTNAMES(sr) && smb_maybe_mangled(name)) {
333 longname = kmem_alloc(MAXNAMELEN, KM_SLEEP);
334 rc = smb_unmangle(dnode, name, longname, MAXNAMELEN, flags);
335 kmem_free(longname, MAXNAMELEN);
336
337 if (rc == 0)
338 rc = EEXIST;
339 if (rc != ENOENT)
340 return (rc);
341 }
342
343 rc = smb_fsop_create_file(sr, cr, dnode, name, flags,
344 attr, ret_snode);
345 return (rc);
346
347 }
348
349
350 /*
351 * smb_fsop_create_stream
352 *
353 * Create NTFS named stream file (sname) on unnamed stream
354 * file (fname), creating the unnamed stream file if it
355 * doesn't exist.
356 * If we created the unnamed stream file and then creation
357 * of the named stream file fails, we delete the unnamed stream.
358 * Since we use the real file name for the smb_vop_remove we
359 * clear the SMB_IGNORE_CASE flag to ensure a case sensitive
360 * match.
361 *
362 * The second parameter of smb_vop_setattr() is set to
363 * NULL, even though an unnamed stream exists. This is
364 * because we want to set the UID and GID on the named
365 * stream in this case for consistency with the (unnamed
366 * stream) file (see comments for smb_vop_setattr()).
367 */
368 static int
369 smb_fsop_create_stream(smb_request_t *sr, cred_t *cr,
370 smb_node_t *dnode, char *fname, char *sname, int flags,
371 smb_attr_t *attr, smb_node_t **ret_snode)
372 {
373 smb_attr_t fattr;
374 smb_node_t *fnode;
375 vnode_t *xattrdvp;
376 vnode_t *vp;
377 cred_t *kcr = zone_kcred();
378 int rc = 0;
379 boolean_t fcreate = B_FALSE;
380
381 /* Look up / create the unnamed stream, fname */
382 rc = smb_fsop_lookup(sr, cr, flags | SMB_FOLLOW_LINKS,
383 sr->tid_tree->t_snode, dnode, fname, &fnode);
384 if (rc == ENOENT) {
385 fcreate = B_TRUE;
386 rc = smb_fsop_create_file(sr, cr, dnode, fname, flags,
387 attr, &fnode);
388 }
389 if (rc != 0)
390 return (rc);
391
392 fattr.sa_mask = SMB_AT_UID | SMB_AT_GID;
393 rc = smb_vop_getattr(fnode->vp, NULL, &fattr, 0, kcr);
394
395 if (rc == 0) {
396 /* create the named stream, sname */
397 rc = smb_vop_stream_create(fnode->vp, sname, attr,
398 &vp, &xattrdvp, flags, cr);
399 }
400 if (rc != 0) {
401 if (fcreate) {
402 flags &= ~SMB_IGNORE_CASE;
403 (void) smb_vop_remove(dnode->vp,
404 fnode->od_name, flags, cr);
405 }
406 smb_node_release(fnode);
407 return (rc);
408 }
409
410 attr->sa_vattr.va_uid = fattr.sa_vattr.va_uid;
411 attr->sa_vattr.va_gid = fattr.sa_vattr.va_gid;
412 attr->sa_mask = SMB_AT_UID | SMB_AT_GID;
413
414 rc = smb_vop_setattr(vp, NULL, attr, 0, kcr);
415 if (rc != 0) {
416 smb_node_release(fnode);
417 return (rc);
418 }
419
420 *ret_snode = smb_stream_node_lookup(sr, cr, fnode, xattrdvp,
421 vp, sname);
422
423 smb_node_release(fnode);
424 VN_RELE(xattrdvp);
425 VN_RELE(vp);
426
427 if (*ret_snode == NULL)
428 rc = ENOMEM;
429
430 /* notify change to the unnamed stream */
431 if (rc == 0)
432 smb_node_notify_change(dnode,
433 FILE_ACTION_ADDED_STREAM, fname);
434
435 return (rc);
436 }
437
438 /*
439 * smb_fsop_create_file
440 */
441 static int
442 smb_fsop_create_file(smb_request_t *sr, cred_t *cr,
443 smb_node_t *dnode, char *name, int flags,
444 smb_attr_t *attr, smb_node_t **ret_snode)
445 {
446 smb_arg_open_t *op = &sr->sr_open;
447 vnode_t *vp;
448 int rc;
449
450 #ifdef _KERNEL
451 smb_fssd_t fs_sd;
452 uint32_t secinfo;
453 uint32_t status;
454
455 if (op->sd) {
456 /*
457 * SD sent by client in Windows format. Needs to be
458 * converted to FS format. No inheritance.
459 */
460 secinfo = smb_sd_get_secinfo(op->sd);
461 smb_fssd_init(&fs_sd, secinfo, 0);
462
463 status = smb_sd_tofs(op->sd, &fs_sd);
464 if (status == NT_STATUS_SUCCESS) {
465 rc = smb_fsop_create_with_sd(sr, cr, dnode,
466 name, attr, ret_snode, &fs_sd);
467 } else {
468 rc = EINVAL;
469 }
470 smb_fssd_term(&fs_sd);
471 } else if (sr->tid_tree->t_acltype == ACE_T) {
472 /*
473 * No incoming SD and filesystem is ZFS
474 * Server applies Windows inheritance rules,
475 * see smb_fsop_sdinherit() comments as to why.
476 */
477 smb_fssd_init(&fs_sd, SMB_ACL_SECINFO, 0);
478 rc = smb_fsop_sdinherit(sr, dnode, &fs_sd);
479 if (rc == 0) {
480 rc = smb_fsop_create_with_sd(sr, cr, dnode,
481 name, attr, ret_snode, &fs_sd);
482 }
483
484 smb_fssd_term(&fs_sd);
485 } else
486 #endif /* _KERNEL */
487 {
488 /*
489 * No incoming SD and filesystem is not ZFS
490 * let the filesystem handles the inheritance.
491 */
492 rc = smb_vop_create(dnode->vp, name, attr, &vp,
493 flags, cr, NULL);
494
495 if (rc == 0) {
496 *ret_snode = smb_node_lookup(sr, op, cr, vp,
497 name, dnode, NULL);
498
499 if (*ret_snode == NULL)
500 rc = ENOMEM;
501
502 VN_RELE(vp);
503 }
504
505 }
506
507 if (rc == 0)
508 smb_node_notify_change(dnode, FILE_ACTION_ADDED, name);
509
510 return (rc);
511 }
512
513 /*
514 * smb_fsop_mkdir
515 *
516 * All SMB functions should use this wrapper to ensure that
517 * the the calls are performed with the appropriate credentials.
518 * Please document any direct call to explain the reason
519 * for avoiding this wrapper.
520 *
521 * It is assumed that a reference exists on snode coming into this routine.
522 *
523 * *ret_snode is returned with a reference upon success. No reference is
524 * taken if an error is returned.
525 */
526 int
527 smb_fsop_mkdir(
528 smb_request_t *sr,
529 cred_t *cr,
530 smb_node_t *dnode,
531 char *name,
532 smb_attr_t *attr,
533 smb_node_t **ret_snode)
534 {
535 struct open_param *op = &sr->arg.open;
536 char *longname;
537 vnode_t *vp;
538 int flags = 0;
539 int rc;
540
541 #ifdef _KERNEL
542 smb_fssd_t fs_sd;
543 uint32_t secinfo;
544 uint32_t status;
545 #endif /* _KERNEL */
546
547 ASSERT(cr);
548 ASSERT(dnode);
549 ASSERT(dnode->n_magic == SMB_NODE_MAGIC);
550 ASSERT(dnode->n_state != SMB_NODE_STATE_DESTROYING);
551
552 ASSERT(ret_snode);
553 *ret_snode = 0;
554
555 ASSERT(name);
556 if (*name == 0)
557 return (EINVAL);
558
559 ASSERT(sr);
560 ASSERT(sr->tid_tree);
561
562 if (SMB_TREE_CONTAINS_NODE(sr, dnode) == 0)
563 return (EACCES);
564
565 if (SMB_TREE_IS_READONLY(sr))
566 return (EROFS);
567 if (SMB_TREE_SUPPORTS_CATIA(sr))
568 flags |= SMB_CATIA;
569 if (SMB_TREE_SUPPORTS_ABE(sr))
570 flags |= SMB_ABE;
571
572 if (SMB_TREE_SUPPORTS_SHORTNAMES(sr) && smb_maybe_mangled(name)) {
573 longname = kmem_alloc(MAXNAMELEN, KM_SLEEP);
574 rc = smb_unmangle(dnode, name, longname, MAXNAMELEN, flags);
575 kmem_free(longname, MAXNAMELEN);
576
577 /*
578 * If the name passed in by the client has an unmangled
579 * equivalent that is found in the specified directory,
580 * then the mkdir cannot succeed. Return EEXIST.
581 *
582 * Only if ENOENT is returned will a mkdir be attempted.
583 */
584
585 if (rc == 0)
586 rc = EEXIST;
587
588 if (rc != ENOENT)
589 return (rc);
590 }
591
592 if (SMB_TREE_IS_CASEINSENSITIVE(sr))
593 flags = SMB_IGNORE_CASE;
594
595 #ifdef _KERNEL
596 if (op->sd) {
597 /*
598 * SD sent by client in Windows format. Needs to be
599 * converted to FS format. No inheritance.
600 */
601 secinfo = smb_sd_get_secinfo(op->sd);
602 smb_fssd_init(&fs_sd, secinfo, SMB_FSSD_FLAGS_DIR);
603
604 status = smb_sd_tofs(op->sd, &fs_sd);
605 if (status == NT_STATUS_SUCCESS) {
606 rc = smb_fsop_create_with_sd(sr, cr, dnode,
607 name, attr, ret_snode, &fs_sd);
608 }
609 else
610 rc = EINVAL;
611 smb_fssd_term(&fs_sd);
612 } else if (sr->tid_tree->t_acltype == ACE_T) {
613 /*
614 * No incoming SD and filesystem is ZFS
615 * Server applies Windows inheritance rules,
616 * see smb_fsop_sdinherit() comments as to why.
617 */
618 smb_fssd_init(&fs_sd, SMB_ACL_SECINFO, SMB_FSSD_FLAGS_DIR);
619 rc = smb_fsop_sdinherit(sr, dnode, &fs_sd);
620 if (rc == 0) {
621 rc = smb_fsop_create_with_sd(sr, cr, dnode,
622 name, attr, ret_snode, &fs_sd);
623 }
624
625 smb_fssd_term(&fs_sd);
626
627 } else
628 #endif /* _KERNEL */
629 {
630 rc = smb_vop_mkdir(dnode->vp, name, attr, &vp, flags, cr,
631 NULL);
632
633 if (rc == 0) {
634 *ret_snode = smb_node_lookup(sr, op, cr, vp, name,
635 dnode, NULL);
636
637 if (*ret_snode == NULL)
638 rc = ENOMEM;
639
640 VN_RELE(vp);
641 }
642 }
643
644 if (rc == 0)
645 smb_node_notify_change(dnode, FILE_ACTION_ADDED, name);
646
647 return (rc);
648 }
649
650 /*
651 * smb_fsop_remove
652 *
653 * All SMB functions should use this wrapper to ensure that
654 * the the calls are performed with the appropriate credentials.
655 * Please document any direct call to explain the reason
656 * for avoiding this wrapper.
657 *
658 * It is assumed that a reference exists on snode coming into this routine.
659 *
660 * A null smb_request might be passed to this function.
661 */
662 int
663 smb_fsop_remove(
664 smb_request_t *sr,
665 cred_t *cr,
666 smb_node_t *dnode,
667 char *name,
668 uint32_t flags)
669 {
670 smb_node_t *fnode;
671 char *longname;
672 char *fname;
673 char *sname;
674 int rc;
675
676 ASSERT(cr);
677 /*
678 * The state of the node could be SMB_NODE_STATE_DESTROYING if this
679 * function is called during the deletion of the node (because of
680 * DELETE_ON_CLOSE).
681 */
682 ASSERT(dnode);
683 ASSERT(dnode->n_magic == SMB_NODE_MAGIC);
684
685 if (SMB_TREE_CONTAINS_NODE(sr, dnode) == 0 ||
686 SMB_TREE_HAS_ACCESS(sr, ACE_DELETE) == 0)
687 return (EACCES);
688
689 if (SMB_TREE_IS_READONLY(sr))
690 return (EROFS);
691
692 fname = kmem_alloc(MAXNAMELEN, KM_SLEEP);
693 sname = kmem_alloc(MAXNAMELEN, KM_SLEEP);
694
695 if (dnode->flags & NODE_XATTR_DIR) {
696 fnode = dnode->n_dnode;
697 rc = smb_vop_stream_remove(fnode->vp, name, flags, cr);
698
699 /* notify change to the unnamed stream */
700 if ((rc == 0) && fnode->n_dnode) {
701 smb_node_notify_change(fnode->n_dnode,
702 FILE_ACTION_REMOVED_STREAM, fnode->od_name);
703 }
704 } else if (smb_is_stream_name(name)) {
705 smb_stream_parse_name(name, fname, sname);
706
707 /*
708 * Look up the unnamed stream (i.e. fname).
709 * Unmangle processing will be done on fname
710 * as well as any link target.
711 */
712
713 rc = smb_fsop_lookup(sr, cr, flags | SMB_FOLLOW_LINKS,
714 sr->tid_tree->t_snode, dnode, fname, &fnode);
715
716 if (rc != 0) {
717 kmem_free(fname, MAXNAMELEN);
718 kmem_free(sname, MAXNAMELEN);
719 return (rc);
720 }
721
722 /*
723 * XXX
724 * Need to find out what permission is required by NTFS
725 * to remove a stream.
726 */
727 rc = smb_vop_stream_remove(fnode->vp, sname, flags, cr);
728
729 smb_node_release(fnode);
730
731 /* notify change to the unnamed stream */
732 if (rc == 0) {
733 smb_node_notify_change(dnode,
734 FILE_ACTION_REMOVED_STREAM, fname);
735 }
736 } else {
737 rc = smb_vop_remove(dnode->vp, name, flags, cr);
738
739 if (rc == ENOENT) {
740 if (!SMB_TREE_SUPPORTS_SHORTNAMES(sr) ||
741 !smb_maybe_mangled(name)) {
742 kmem_free(fname, MAXNAMELEN);
743 kmem_free(sname, MAXNAMELEN);
744 return (rc);
745 }
746 longname = kmem_alloc(MAXNAMELEN, KM_SLEEP);
747
748 if (SMB_TREE_SUPPORTS_ABE(sr))
749 flags |= SMB_ABE;
750
751 rc = smb_unmangle(dnode, name, longname, MAXNAMELEN,
752 flags);
753
754 if (rc == 0) {
755 /*
756 * longname is the real (case-sensitive)
757 * on-disk name.
758 * We make sure we do a remove on this exact
759 * name, as the name was mangled and denotes
760 * a unique file.
761 */
762 flags &= ~SMB_IGNORE_CASE;
763 rc = smb_vop_remove(dnode->vp, longname,
764 flags, cr);
765 }
766 kmem_free(longname, MAXNAMELEN);
767 }
768 if (rc == 0) {
769 smb_node_notify_change(dnode,
770 FILE_ACTION_REMOVED, name);
771 }
772 }
773
774 kmem_free(fname, MAXNAMELEN);
775 kmem_free(sname, MAXNAMELEN);
776
777 return (rc);
778 }
779
780 /*
781 * smb_fsop_remove_streams
782 *
783 * This function removes a file's streams without removing the
784 * file itself.
785 *
786 * It is assumed that fnode is not a link.
787 */
788 uint32_t
789 smb_fsop_remove_streams(smb_request_t *sr, cred_t *cr, smb_node_t *fnode)
790 {
791 int rc, flags = 0;
792 smb_odir_t *od;
793 smb_odirent_t *odirent;
794 uint32_t status;
795 boolean_t eos;
796
797 ASSERT(sr);
798 ASSERT(cr);
799 ASSERT(fnode);
800 ASSERT(fnode->n_magic == SMB_NODE_MAGIC);
801 ASSERT(fnode->n_state != SMB_NODE_STATE_DESTROYING);
802
803 if (SMB_TREE_CONTAINS_NODE(sr, fnode) == 0)
804 return (NT_STATUS_ACCESS_DENIED);
805
806 if (SMB_TREE_IS_READONLY(sr))
807 return (NT_STATUS_ACCESS_DENIED);
808
809 if (SMB_TREE_IS_CASEINSENSITIVE(sr))
810 flags = SMB_IGNORE_CASE;
811
812 if (SMB_TREE_SUPPORTS_CATIA(sr))
813 flags |= SMB_CATIA;
814
815 status = smb_odir_openat(sr, fnode, &od);
816 switch (status) {
817 case 0:
818 break;
819 case NT_STATUS_NO_SUCH_FILE:
820 case NT_STATUS_NOT_SUPPORTED:
821 /* No streams to remove. */
822 return (0);
823 default:
824 return (status);
825 }
826
827 odirent = kmem_alloc(sizeof (smb_odirent_t), KM_SLEEP);
828 for (;;) {
829 rc = smb_odir_read(sr, od, odirent, &eos);
830 if ((rc != 0) || (eos))
831 break;
832 (void) smb_vop_remove(od->d_dnode->vp, odirent->od_name,
833 flags, cr);
834 }
835 kmem_free(odirent, sizeof (smb_odirent_t));
836 if (eos && rc == ENOENT)
837 rc = 0;
838
839 smb_odir_close(od);
840 smb_odir_release(od);
841 if (rc)
842 status = smb_errno2status(rc);
843 return (status);
844 }
845
846 /*
847 * smb_fsop_rmdir
848 *
849 * All SMB functions should use this wrapper to ensure that
850 * the the calls are performed with the appropriate credentials.
851 * Please document any direct call to explain the reason
852 * for avoiding this wrapper.
853 *
854 * It is assumed that a reference exists on snode coming into this routine.
855 */
856 int
857 smb_fsop_rmdir(
858 smb_request_t *sr,
859 cred_t *cr,
860 smb_node_t *dnode,
861 char *name,
862 uint32_t flags)
863 {
864 int rc;
865 char *longname;
866
867 ASSERT(cr);
868 /*
869 * The state of the node could be SMB_NODE_STATE_DESTROYING if this
870 * function is called during the deletion of the node (because of
871 * DELETE_ON_CLOSE).
872 */
873 ASSERT(dnode);
874 ASSERT(dnode->n_magic == SMB_NODE_MAGIC);
875
876 if (SMB_TREE_CONTAINS_NODE(sr, dnode) == 0 ||
877 SMB_TREE_HAS_ACCESS(sr, ACE_DELETE_CHILD) == 0)
878 return (EACCES);
879
880 if (SMB_TREE_IS_READONLY(sr))
881 return (EROFS);
882
883 rc = smb_vop_rmdir(dnode->vp, name, flags, cr);
884
885 if (rc == ENOENT) {
886 if (!SMB_TREE_SUPPORTS_SHORTNAMES(sr) ||
887 !smb_maybe_mangled(name)) {
888 return (rc);
889 }
890
891 longname = kmem_alloc(MAXNAMELEN, KM_SLEEP);
892
893 if (SMB_TREE_SUPPORTS_ABE(sr))
894 flags |= SMB_ABE;
895 rc = smb_unmangle(dnode, name, longname, MAXNAMELEN, flags);
896
897 if (rc == 0) {
898 /*
899 * longname is the real (case-sensitive)
900 * on-disk name.
901 * We make sure we do a rmdir on this exact
902 * name, as the name was mangled and denotes
903 * a unique directory.
904 */
905 flags &= ~SMB_IGNORE_CASE;
906 rc = smb_vop_rmdir(dnode->vp, longname, flags, cr);
907 }
908
909 kmem_free(longname, MAXNAMELEN);
910 }
911
912 if (rc == 0)
913 smb_node_notify_change(dnode, FILE_ACTION_REMOVED, name);
914
915 return (rc);
916 }
917
918 /*
919 * smb_fsop_getattr
920 *
921 * All SMB functions should use this wrapper to ensure that
922 * the the calls are performed with the appropriate credentials.
923 * Please document any direct call to explain the reason
924 * for avoiding this wrapper.
925 *
926 * It is assumed that a reference exists on snode coming into this routine.
927 */
928 int
929 smb_fsop_getattr(smb_request_t *sr, cred_t *cr, smb_node_t *snode,
930 smb_attr_t *attr)
931 {
932 smb_node_t *unnamed_node;
933 vnode_t *unnamed_vp = NULL;
934 uint32_t status;
935 uint32_t access = 0;
936 int flags = 0;
937 int rc;
938
939 ASSERT(cr);
940 ASSERT(snode);
941 ASSERT(snode->n_magic == SMB_NODE_MAGIC);
942 ASSERT(snode->n_state != SMB_NODE_STATE_DESTROYING);
943
944 if (SMB_TREE_CONTAINS_NODE(sr, snode) == 0 ||
945 SMB_TREE_HAS_ACCESS(sr, ACE_READ_ATTRIBUTES) == 0)
946 return (EACCES);
947
948 /* sr could be NULL in some cases */
949 if (sr && sr->fid_ofile) {
950 /* if uid and/or gid is requested */
951 if (attr->sa_mask & (SMB_AT_UID|SMB_AT_GID))
952 access |= READ_CONTROL;
953
954 /* if anything else is also requested */
955 if (attr->sa_mask & ~(SMB_AT_UID|SMB_AT_GID))
956 access |= FILE_READ_ATTRIBUTES;
957
958 status = smb_ofile_access(sr->fid_ofile, cr, access);
959 if (status != NT_STATUS_SUCCESS)
960 return (EACCES);
961
962 if (smb_tree_has_feature(sr->tid_tree,
963 SMB_TREE_ACEMASKONACCESS))
964 flags = ATTR_NOACLCHECK;
965 }
966
967 unnamed_node = SMB_IS_STREAM(snode);
968
969 if (unnamed_node) {
970 ASSERT(unnamed_node->n_magic == SMB_NODE_MAGIC);
971 ASSERT(unnamed_node->n_state != SMB_NODE_STATE_DESTROYING);
972 unnamed_vp = unnamed_node->vp;
973 }
974
975 rc = smb_vop_getattr(snode->vp, unnamed_vp, attr, flags, cr);
976
977 if ((rc == 0) && smb_node_is_dfslink(snode)) {
978 /* a DFS link should be treated as a directory */
979 attr->sa_dosattr |= FILE_ATTRIBUTE_DIRECTORY;
980 }
981
982 return (rc);
983 }
984
985 /*
986 * smb_fsop_link
987 *
988 * All SMB functions should use this smb_vop_link wrapper to ensure that
989 * the smb_vop_link is performed with the appropriate credentials.
990 * Please document any direct call to smb_vop_link to explain the reason
991 * for avoiding this wrapper.
992 *
993 * It is assumed that references exist on from_dnode and to_dnode coming
994 * into this routine.
995 */
996 int
997 smb_fsop_link(smb_request_t *sr, cred_t *cr, smb_node_t *from_fnode,
998 smb_node_t *to_dnode, char *to_name)
999 {
1000 char *longname = NULL;
1001 int flags = 0;
1002 int rc;
1003
1004 ASSERT(sr);
1005 ASSERT(sr->tid_tree);
1006 ASSERT(cr);
1007 ASSERT(to_dnode);
1008 ASSERT(to_dnode->n_magic == SMB_NODE_MAGIC);
1009 ASSERT(to_dnode->n_state != SMB_NODE_STATE_DESTROYING);
1010 ASSERT(from_fnode);
1011 ASSERT(from_fnode->n_magic == SMB_NODE_MAGIC);
1012 ASSERT(from_fnode->n_state != SMB_NODE_STATE_DESTROYING);
1013
1014 if (SMB_TREE_CONTAINS_NODE(sr, from_fnode) == 0)
1015 return (EACCES);
1016
1017 if (SMB_TREE_CONTAINS_NODE(sr, to_dnode) == 0)
1018 return (EACCES);
1019
1020 if (SMB_TREE_IS_READONLY(sr))
1021 return (EROFS);
1022
1023 if (SMB_TREE_IS_CASEINSENSITIVE(sr))
1024 flags = SMB_IGNORE_CASE;
1025 if (SMB_TREE_SUPPORTS_CATIA(sr))
1026 flags |= SMB_CATIA;
1027 if (SMB_TREE_SUPPORTS_ABE(sr))
1028 flags |= SMB_ABE;
1029
1030 if (SMB_TREE_SUPPORTS_SHORTNAMES(sr) && smb_maybe_mangled(to_name)) {
1031 longname = kmem_alloc(MAXNAMELEN, KM_SLEEP);
1032 rc = smb_unmangle(to_dnode, to_name, longname,
1033 MAXNAMELEN, flags);
1034 kmem_free(longname, MAXNAMELEN);
1035
1036 if (rc == 0)
1037 rc = EEXIST;
1038 if (rc != ENOENT)
1039 return (rc);
1040 }
1041
1042 rc = smb_vop_link(to_dnode->vp, from_fnode->vp, to_name, flags, cr);
1043
1044 if (rc == 0)
1045 smb_node_notify_change(to_dnode, FILE_ACTION_ADDED, to_name);
1046
1047 return (rc);
1048 }
1049
1050 /*
1051 * smb_fsop_rename
1052 *
1053 * All SMB functions should use this smb_vop_rename wrapper to ensure that
1054 * the smb_vop_rename is performed with the appropriate credentials.
1055 * Please document any direct call to smb_vop_rename to explain the reason
1056 * for avoiding this wrapper.
1057 *
1058 * It is assumed that references exist on from_dnode and to_dnode coming
1059 * into this routine.
1060 */
1061 int
1062 smb_fsop_rename(
1063 smb_request_t *sr,
1064 cred_t *cr,
1065 smb_node_t *from_dnode,
1066 char *from_name,
1067 smb_node_t *to_dnode,
1068 char *to_name)
1069 {
1070 smb_node_t *from_snode;
1071 smb_attr_t from_attr;
1072 vnode_t *from_vp;
1073 int flags = 0, ret_flags;
1074 int rc;
1075 boolean_t isdir;
1076
1077 ASSERT(cr);
1078 ASSERT(from_dnode);
1079 ASSERT(from_dnode->n_magic == SMB_NODE_MAGIC);
1080 ASSERT(from_dnode->n_state != SMB_NODE_STATE_DESTROYING);
1081
1082 ASSERT(to_dnode);
1083 ASSERT(to_dnode->n_magic == SMB_NODE_MAGIC);
1084 ASSERT(to_dnode->n_state != SMB_NODE_STATE_DESTROYING);
1085
1086 if (SMB_TREE_CONTAINS_NODE(sr, from_dnode) == 0)
1087 return (EACCES);
1088
1089 if (SMB_TREE_CONTAINS_NODE(sr, to_dnode) == 0)
1090 return (EACCES);
1091
1092 ASSERT(sr);
1093 ASSERT(sr->tid_tree);
1094 if (SMB_TREE_IS_READONLY(sr))
1095 return (EROFS);
1096
1097 /*
1098 * Note: There is no need to check SMB_TREE_IS_CASEINSENSITIVE
1099 * here.
1100 *
1101 * A case-sensitive rename is always done in this routine
1102 * because we are using the on-disk name from an earlier lookup.
1103 * If a mangled name was passed in by the caller (denoting a
1104 * deterministic lookup), then the exact file must be renamed
1105 * (i.e. SMB_IGNORE_CASE must not be passed to VOP_RENAME, or
1106 * else the underlying file system might return a "first-match"
1107 * on this on-disk name, possibly resulting in the wrong file).
1108 */
1109
1110 if (SMB_TREE_SUPPORTS_CATIA(sr))
1111 flags |= SMB_CATIA;
1112
1113 /*
1114 * XXX: Lock required through smb_node_release() below?
1115 */
1116
1117 rc = smb_vop_lookup(from_dnode->vp, from_name, &from_vp, NULL,
1118 flags, &ret_flags, NULL, &from_attr, cr);
1119
1120 if (rc != 0)
1121 return (rc);
1122
1123 if (from_attr.sa_dosattr & FILE_ATTRIBUTE_REPARSE_POINT) {
1124 VN_RELE(from_vp);
1125 return (EACCES);
1126 }
1127
1128 isdir = ((from_attr.sa_dosattr & FILE_ATTRIBUTE_DIRECTORY) != 0);
1129
1130 if ((isdir && SMB_TREE_HAS_ACCESS(sr,
1131 ACE_DELETE_CHILD | ACE_ADD_SUBDIRECTORY) !=
1132 (ACE_DELETE_CHILD | ACE_ADD_SUBDIRECTORY)) ||
1133 (!isdir && SMB_TREE_HAS_ACCESS(sr, ACE_DELETE | ACE_ADD_FILE) !=
1134 (ACE_DELETE | ACE_ADD_FILE))) {
1135 VN_RELE(from_vp);
1136 return (EACCES);
1137 }
1138
1139 /*
1140 * SMB checks access on open and retains an access granted
1141 * mask for use while the file is open. ACL changes should
1142 * not affect access to an open file.
1143 *
1144 * If the rename is being performed on an ofile:
1145 * - Check the ofile's access granted mask to see if the
1146 * rename is permitted - requires DELETE access.
1147 * - If the file system does access checking, set the
1148 * ATTR_NOACLCHECK flag to ensure that the file system
1149 * does not check permissions on subsequent calls.
1150 */
1151 if (sr && sr->fid_ofile) {
1152 rc = smb_ofile_access(sr->fid_ofile, cr, DELETE);
1153 if (rc != NT_STATUS_SUCCESS) {
1154 VN_RELE(from_vp);
1155 return (EACCES);
1156 }
1157
1158 if (smb_tree_has_feature(sr->tid_tree,
1159 SMB_TREE_ACEMASKONACCESS))
1160 flags = ATTR_NOACLCHECK;
1161 }
1162
1163 rc = smb_vop_rename(from_dnode->vp, from_name, to_dnode->vp,
1164 to_name, flags, cr);
1165
1166 if (rc == 0) {
1167 from_snode = smb_node_lookup(sr, NULL, cr, from_vp, from_name,
1168 from_dnode, NULL);
1169
1170 if (from_snode == NULL) {
1171 rc = ENOMEM;
1172 } else {
1173 smb_node_rename(from_dnode, from_snode,
1174 to_dnode, to_name);
1175 smb_node_release(from_snode);
1176 }
1177 }
1178 VN_RELE(from_vp);
1179
1180 if (rc == 0) {
1181 if (from_dnode == to_dnode) {
1182 smb_node_notify_change(from_dnode,
1183 FILE_ACTION_RENAMED_OLD_NAME, from_name);
1184 smb_node_notify_change(to_dnode,
1185 FILE_ACTION_RENAMED_NEW_NAME, to_name);
1186 } else {
1187 smb_node_notify_change(from_dnode,
1188 FILE_ACTION_REMOVED, from_name);
1189 smb_node_notify_change(to_dnode,
1190 FILE_ACTION_ADDED, to_name);
1191 }
1192 }
1193
1194 /* XXX: unlock */
1195
1196 return (rc);
1197 }
1198
1199 /*
1200 * smb_fsop_setattr
1201 *
1202 * All SMB functions should use this wrapper to ensure that
1203 * the the calls are performed with the appropriate credentials.
1204 * Please document any direct call to explain the reason
1205 * for avoiding this wrapper.
1206 *
1207 * It is assumed that a reference exists on snode coming into
1208 * this function.
1209 * A null smb_request might be passed to this function.
1210 */
1211 int
1212 smb_fsop_setattr(
1213 smb_request_t *sr,
1214 cred_t *cr,
1215 smb_node_t *snode,
1216 smb_attr_t *set_attr)
1217 {
1218 smb_node_t *unnamed_node;
1219 vnode_t *unnamed_vp = NULL;
1220 uint32_t status;
1221 uint32_t access;
1222 int rc = 0;
1223 int flags = 0;
1224 uint_t sa_mask;
1225
1226 ASSERT(cr);
1227 ASSERT(snode);
1228 ASSERT(snode->n_magic == SMB_NODE_MAGIC);
1229 ASSERT(snode->n_state != SMB_NODE_STATE_DESTROYING);
1230
1231 if (SMB_TREE_CONTAINS_NODE(sr, snode) == 0)
1232 return (EACCES);
1233
1234 if (SMB_TREE_IS_READONLY(sr))
1235 return (EROFS);
1236
1237 if (SMB_TREE_HAS_ACCESS(sr,
1238 ACE_WRITE_ATTRIBUTES | ACE_WRITE_NAMED_ATTRS) == 0)
1239 return (EACCES);
1240
1241 /*
1242 * The file system cannot detect pending READDONLY
1243 * (i.e. if the file has been opened readonly but
1244 * not yet closed) so we need to test READONLY here.
1245 *
1246 * Note that file handle that were opened before the
1247 * READONLY flag was set in the node (or the FS) are
1248 * immune to that change, and remain writable.
1249 */
1250 if (sr && (set_attr->sa_mask & SMB_AT_SIZE)) {
1251 if (sr->fid_ofile) {
1252 if (SMB_OFILE_IS_READONLY(sr->fid_ofile))
1253 return (EACCES);
1254 } else {
1255 if (SMB_PATHFILE_IS_READONLY(sr, snode))
1256 return (EACCES);
1257 }
1258 }
1259
1260 /*
1261 * SMB checks access on open and retains an access granted
1262 * mask for use while the file is open. ACL changes should
1263 * not affect access to an open file.
1264 *
1265 * If the setattr is being performed on an ofile:
1266 * - Check the ofile's access granted mask to see if the
1267 * setattr is permitted.
1268 * UID, GID - require WRITE_OWNER
1269 * SIZE, ALLOCSZ - require FILE_WRITE_DATA
1270 * all other attributes require FILE_WRITE_ATTRIBUTES
1271 *
1272 * - If the file system does access checking, set the
1273 * ATTR_NOACLCHECK flag to ensure that the file system
1274 * does not check permissions on subsequent calls.
1275 */
1276 if (sr && sr->fid_ofile) {
1277 sa_mask = set_attr->sa_mask;
1278 access = 0;
1279
1280 if (sa_mask & (SMB_AT_SIZE | SMB_AT_ALLOCSZ)) {
1281 access |= FILE_WRITE_DATA;
1282 sa_mask &= ~(SMB_AT_SIZE | SMB_AT_ALLOCSZ);
1283 }
1284
1285 if (sa_mask & (SMB_AT_UID|SMB_AT_GID)) {
1286 access |= WRITE_OWNER;
1287 sa_mask &= ~(SMB_AT_UID|SMB_AT_GID);
1288 }
1289
1290 if (sa_mask)
1291 access |= FILE_WRITE_ATTRIBUTES;
1292
1293 status = smb_ofile_access(sr->fid_ofile, cr, access);
1294 if (status != NT_STATUS_SUCCESS)
1295 return (EACCES);
1296
1297 if (smb_tree_has_feature(sr->tid_tree,
1298 SMB_TREE_ACEMASKONACCESS))
1299 flags = ATTR_NOACLCHECK;
1300 }
1301
1302 unnamed_node = SMB_IS_STREAM(snode);
1303
1304 if (unnamed_node) {
1305 ASSERT(unnamed_node->n_magic == SMB_NODE_MAGIC);
1306 ASSERT(unnamed_node->n_state != SMB_NODE_STATE_DESTROYING);
1307 unnamed_vp = unnamed_node->vp;
1308 }
1309
1310 rc = smb_vop_setattr(snode->vp, unnamed_vp, set_attr, flags, cr);
1311 return (rc);
1312 }
1313
1314 /*
1315 * Support for SMB2 setinfo FileValidDataLengthInformation.
1316 * Free data from the specified offset to EoF.
1317 *
1318 * This can effectively truncate data. It truncates the data
1319 * leaving the file size as it was, leaving zeros after the
1320 * offset specified here. That is effectively modifying the
1321 * file content, so for access control this is a write.
1322 */
1323 int
1324 smb_fsop_set_data_length(
1325 smb_request_t *sr,
1326 cred_t *cr,
1327 smb_node_t *node,
1328 offset_t end_of_data)
1329 {
1330 flock64_t flk;
1331 uint32_t status;
1332 uint32_t access = FILE_WRITE_DATA;
1333 int rc;
1334
1335 ASSERT(cr);
1336 ASSERT(node);
1337 ASSERT(node->n_magic == SMB_NODE_MAGIC);
1338 ASSERT(node->n_state != SMB_NODE_STATE_DESTROYING);
1339
1340 if (SMB_TREE_CONTAINS_NODE(sr, node) == 0)
1341 return (EACCES);
1342
1343 if (SMB_TREE_IS_READONLY(sr))
1344 return (EROFS);
1345
1346 if (SMB_TREE_HAS_ACCESS(sr, access) == 0)
1347 return (EACCES);
1348
1349 /*
1350 * The file system cannot detect pending READDONLY
1351 * (i.e. if the file has been opened readonly but
1352 * not yet closed) so we need to test READONLY here.
1353 *
1354 * Note that file handle that were opened before the
1355 * READONLY flag was set in the node (or the FS) are
1356 * immune to that change, and remain writable.
1357 */
1358 if (sr->fid_ofile) {
1359 if (SMB_OFILE_IS_READONLY(sr->fid_ofile))
1360 return (EACCES);
1361 } else {
1362 /* This requires an open file. */
1363 return (EACCES);
1364 }
1365
1366 /*
1367 * SMB checks access on open and retains an access granted
1368 * mask for use while the file is open. ACL changes should
1369 * not affect access to an open file.
1370 *
1371 * If the setattr is being performed on an ofile:
1372 * - Check the ofile's access granted mask to see if this
1373 * modification should be permitted (FILE_WRITE_DATA)
1374 */
1375 status = smb_ofile_access(sr->fid_ofile, cr, access);
1376 if (status != NT_STATUS_SUCCESS)
1377 return (EACCES);
1378
1379 bzero(&flk, sizeof (flk));
1380 flk.l_start = end_of_data;
1381
1382 rc = smb_vop_space(node->vp, F_FREESP, &flk, FWRITE, 0LL, cr);
1383 return (rc);
1384 }
1385
1386 /*
1387 * smb_fsop_read
1388 *
1389 * All SMB functions should use this wrapper to ensure that
1390 * the the calls are performed with the appropriate credentials.
1391 * Please document any direct call to explain the reason
1392 * for avoiding this wrapper.
1393 *
1394 * It is assumed that a reference exists on snode coming into this routine.
1395 */
1396 int
1397 smb_fsop_read(smb_request_t *sr, cred_t *cr, smb_node_t *snode, uio_t *uio)
1398 {
1399 caller_context_t ct;
1400 cred_t *kcr = zone_kcred();
1401 int svmand;
1402 int rc;
1403
1404 ASSERT(cr);
1405 ASSERT(snode);
1406 ASSERT(snode->n_magic == SMB_NODE_MAGIC);
1407 ASSERT(snode->n_state != SMB_NODE_STATE_DESTROYING);
1408
1409 ASSERT(sr);
1410 ASSERT(sr->fid_ofile);
1411
1412 if (SMB_TREE_HAS_ACCESS(sr, ACE_READ_DATA) == 0)
1413 return (EACCES);
1414
1415 rc = smb_ofile_access(sr->fid_ofile, cr, FILE_READ_DATA);
1416 if ((rc != NT_STATUS_SUCCESS) &&
1417 (sr->smb_flg2 & SMB_FLAGS2_READ_IF_EXECUTE))
1418 rc = smb_ofile_access(sr->fid_ofile, cr, FILE_EXECUTE);
1419
1420 if (rc != NT_STATUS_SUCCESS)
1421 return (EACCES);
1422
1423 /*
1424 * Streams permission are checked against the unnamed stream,
1425 * but in FS level they have their own permissions. To avoid
1426 * rejection by FS due to lack of permission on the actual
1427 * extended attr kcred is passed for streams.
1428 */
1429 if (SMB_IS_STREAM(snode))
1430 cr = kcr;
1431
1432 smb_node_start_crit(snode, RW_READER);
1433 rc = nbl_svmand(snode->vp, kcr, &svmand);
1434 if (rc) {
1435 smb_node_end_crit(snode);
1436 return (rc);
1437 }
1438
1439 ct = smb_ct;
1440 ct.cc_pid = sr->fid_ofile->f_uniqid;
1441 rc = nbl_lock_conflict(snode->vp, NBL_READ, uio->uio_loffset,
1442 uio->uio_iov->iov_len, svmand, &ct);
1443
1444 if (rc) {
1445 smb_node_end_crit(snode);
1446 return (ERANGE);
1447 }
1448
1449 rc = smb_vop_read(snode->vp, uio, cr);
1450 smb_node_end_crit(snode);
1451
1452 return (rc);
1453 }
1454
1455 /*
1456 * smb_fsop_write
1457 *
1458 * This is a wrapper function used for smb_write and smb_write_raw operations.
1459 *
1460 * It is assumed that a reference exists on snode coming into this routine.
1461 */
1462 int
1463 smb_fsop_write(
1464 smb_request_t *sr,
1465 cred_t *cr,
1466 smb_node_t *snode,
1467 uio_t *uio,
1468 uint32_t *lcount,
1469 int ioflag)
1470 {
1471 caller_context_t ct;
1472 smb_attr_t attr;
1473 smb_node_t *u_node;
1474 vnode_t *u_vp = NULL;
1475 smb_ofile_t *of;
1476 vnode_t *vp;
1477 cred_t *kcr = zone_kcred();
1478 int svmand;
1479 int rc;
1480
1481 ASSERT(cr);
1482 ASSERT(snode);
1483 ASSERT(snode->n_magic == SMB_NODE_MAGIC);
1484 ASSERT(snode->n_state != SMB_NODE_STATE_DESTROYING);
1485
1486 ASSERT(sr);
1487 ASSERT(sr->tid_tree);
1488 of = sr->fid_ofile;
1489 vp = snode->vp;
1490
1491 if (SMB_TREE_IS_READONLY(sr))
1492 return (EROFS);
1493
1494 if (SMB_OFILE_IS_READONLY(of) ||
1495 SMB_TREE_HAS_ACCESS(sr, ACE_WRITE_DATA | ACE_APPEND_DATA) == 0)
1496 return (EACCES);
1497
1498 rc = smb_ofile_access(of, cr, FILE_WRITE_DATA);
1499 if (rc != NT_STATUS_SUCCESS) {
1500 rc = smb_ofile_access(of, cr, FILE_APPEND_DATA);
1501 if (rc != NT_STATUS_SUCCESS)
1502 return (EACCES);
1503 }
1504
1505 /*
1506 * Streams permission are checked against the unnamed stream,
1507 * but in FS level they have their own permissions. To avoid
1508 * rejection by FS due to lack of permission on the actual
1509 * extended attr kcred is passed for streams.
1510 */
1511 u_node = SMB_IS_STREAM(snode);
1512 if (u_node != NULL) {
1513 ASSERT(u_node->n_magic == SMB_NODE_MAGIC);
1514 ASSERT(u_node->n_state != SMB_NODE_STATE_DESTROYING);
1515 u_vp = u_node->vp;
1516 cr = kcr;
1517 }
1518
1519 smb_node_start_crit(snode, RW_WRITER);
1520 rc = nbl_svmand(vp, kcr, &svmand);
1521 if (rc) {
1522 smb_node_end_crit(snode);
1523 return (rc);
1524 }
1525
1526 ct = smb_ct;
1527 ct.cc_pid = of->f_uniqid;
1528 rc = nbl_lock_conflict(vp, NBL_WRITE, uio->uio_loffset,
1529 uio->uio_iov->iov_len, svmand, &ct);
1530
1531 if (rc) {
1532 smb_node_end_crit(snode);
1533 return (ERANGE);
1534 }
1535
1536 rc = smb_vop_write(vp, uio, ioflag, lcount, cr);
1537
1538 /*
1539 * Once the mtime has been set via this ofile, the
1540 * automatic mtime changes from writes via this ofile
1541 * should cease, preserving the mtime that was set.
1542 * See: [MS-FSA] 2.1.5.14 and smb_node_setattr.
1543 *
1544 * The VFS interface does not offer a way to ask it to
1545 * skip the mtime updates, so we simulate the desired
1546 * behavior by re-setting the mtime after writes on a
1547 * handle where the mtime has been set.
1548 */
1549 if (of->f_pending_attr.sa_mask & SMB_AT_MTIME) {
1550 bcopy(&of->f_pending_attr, &attr, sizeof (attr));
1551 attr.sa_mask = SMB_AT_MTIME;
1552 (void) smb_vop_setattr(vp, u_vp, &attr, 0, kcr);
1553 }
1554
1555 smb_node_end_crit(snode);
1556
1557 return (rc);
1558 }
1559
1560 /*
1561 * smb_fsop_statfs
1562 *
1563 * This is a wrapper function used for stat operations.
1564 */
1565 int
1566 smb_fsop_statfs(
1567 cred_t *cr,
1568 smb_node_t *snode,
1569 struct statvfs64 *statp)
1570 {
1571 ASSERT(cr);
1572 ASSERT(snode);
1573 ASSERT(snode->n_magic == SMB_NODE_MAGIC);
1574 ASSERT(snode->n_state != SMB_NODE_STATE_DESTROYING);
1575
1576 return (smb_vop_statfs(snode->vp, statp, cr));
1577 }
1578
1579 /*
1580 * smb_fsop_access
1581 *
1582 * Named streams do not have separate permissions from the associated
1583 * unnamed stream. Thus, if node is a named stream, the permissions
1584 * check will be performed on the associated unnamed stream.
1585 *
1586 * However, our named streams do have their own quarantine attribute,
1587 * separate from that on the unnamed stream. If READ or EXECUTE
1588 * access has been requested on a named stream, an additional access
1589 * check is performed on the named stream in case it has been
1590 * quarantined. kcred is used to avoid issues with the permissions
1591 * set on the extended attribute file representing the named stream.
1592 */
1593 int
1594 smb_fsop_access(smb_request_t *sr, cred_t *cr, smb_node_t *snode,
1595 uint32_t faccess)
1596 {
1597 int access = 0;
1598 int error;
1599 vnode_t *dir_vp;
1600 boolean_t acl_check = B_TRUE;
1601 smb_node_t *unnamed_node;
1602
1603 ASSERT(sr);
1604 ASSERT(cr);
1605 ASSERT(snode);
1606 ASSERT(snode->n_magic == SMB_NODE_MAGIC);
1607 ASSERT(snode->n_state != SMB_NODE_STATE_DESTROYING);
1608
1609 if (SMB_TREE_IS_READONLY(sr)) {
1610 if (faccess & (FILE_WRITE_DATA|FILE_APPEND_DATA|
1611 FILE_WRITE_EA|FILE_DELETE_CHILD|FILE_WRITE_ATTRIBUTES|
1612 DELETE|WRITE_DAC|WRITE_OWNER)) {
1613 return (NT_STATUS_ACCESS_DENIED);
1614 }
1615 }
1616
1617 if (smb_node_is_reparse(snode) && (faccess & DELETE))
1618 return (NT_STATUS_ACCESS_DENIED);
1619
1620 unnamed_node = SMB_IS_STREAM(snode);
1621 if (unnamed_node) {
1622 ASSERT(unnamed_node->n_magic == SMB_NODE_MAGIC);
1623 ASSERT(unnamed_node->n_state != SMB_NODE_STATE_DESTROYING);
1624
1625 /*
1626 * Perform VREAD access check on the named stream in case it
1627 * is quarantined. kcred is passed to smb_vop_access so it
1628 * doesn't fail due to lack of permission.
1629 */
1630 if (faccess & (FILE_READ_DATA | FILE_EXECUTE)) {
1631 error = smb_vop_access(snode->vp, VREAD,
1632 0, NULL, zone_kcred());
1633 if (error)
1634 return (NT_STATUS_ACCESS_DENIED);
1635 }
1636
1637 /*
1638 * Streams authorization should be performed against the
1639 * unnamed stream.
1640 */
1641 snode = unnamed_node;
1642 }
1643
1644 if (faccess & ACCESS_SYSTEM_SECURITY) {
1645 /*
1646 * This permission is required for reading/writing SACL and
1647 * it's not part of DACL. It's only granted via proper
1648 * privileges.
1649 */
1650 if ((sr->uid_user->u_privileges &
1651 (SMB_USER_PRIV_BACKUP |
1652 SMB_USER_PRIV_RESTORE |
1653 SMB_USER_PRIV_SECURITY)) == 0)
1654 return (NT_STATUS_PRIVILEGE_NOT_HELD);
1655
1656 faccess &= ~ACCESS_SYSTEM_SECURITY;
1657 }
1658
1659 /* Links don't have ACL */
1660 if ((!smb_tree_has_feature(sr->tid_tree, SMB_TREE_ACEMASKONACCESS)) ||
1661 smb_node_is_symlink(snode))
1662 acl_check = B_FALSE;
1663
1664 /* Deny access based on the share access mask */
1665
1666 if ((faccess & ~sr->tid_tree->t_access) != 0)
1667 return (NT_STATUS_ACCESS_DENIED);
1668
1669 if (acl_check) {
1670 dir_vp = (snode->n_dnode) ? snode->n_dnode->vp : NULL;
1671 error = smb_vop_access(snode->vp, faccess, V_ACE_MASK, dir_vp,
1672 cr);
1673 } else {
1674 /*
1675 * FS doesn't understand 32-bit mask, need to map
1676 */
1677 if (faccess & (FILE_WRITE_DATA | FILE_APPEND_DATA))
1678 access |= VWRITE;
1679
1680 if (faccess & FILE_READ_DATA)
1681 access |= VREAD;
1682
1683 if (faccess & FILE_EXECUTE)
1684 access |= VEXEC;
1685
1686 error = smb_vop_access(snode->vp, access, 0, NULL, cr);
1687 }
1688
1689 return ((error) ? NT_STATUS_ACCESS_DENIED : NT_STATUS_SUCCESS);
1690 }
1691
1692 /*
1693 * smb_fsop_lookup_name()
1694 *
1695 * If name indicates that the file is a stream file, perform
1696 * stream specific lookup, otherwise call smb_fsop_lookup.
1697 *
1698 * Return an error if the looked-up file is in outside the tree.
1699 * (Required when invoked from open path.)
1700 *
1701 * Case sensitivity flags (SMB_IGNORE_CASE, SMB_CASE_SENSITIVE):
1702 * if SMB_CASE_SENSITIVE is set, the SMB_IGNORE_CASE flag will NOT be set
1703 * based on the tree's case sensitivity. However, if the SMB_IGNORE_CASE
1704 * flag is set in the flags value passed as a parameter, a case insensitive
1705 * lookup WILL be done (regardless of whether SMB_CASE_SENSITIVE is set
1706 * or not).
1707 */
1708
1709 int
1710 smb_fsop_lookup_name(
1711 smb_request_t *sr,
1712 cred_t *cr,
1713 int flags,
1714 smb_node_t *root_node,
1715 smb_node_t *dnode,
1716 char *name,
1717 smb_node_t **ret_snode)
1718 {
1719 smb_node_t *fnode;
1720 vnode_t *xattrdirvp;
1721 vnode_t *vp;
1722 char *od_name;
1723 char *fname;
1724 char *sname;
1725 int rc;
1726
1727 ASSERT(cr);
1728 ASSERT(dnode);
1729 ASSERT(dnode->n_magic == SMB_NODE_MAGIC);
1730 ASSERT(dnode->n_state != SMB_NODE_STATE_DESTROYING);
1731
1732 /*
1733 * The following check is required for streams processing, below
1734 */
1735
1736 if (!(flags & SMB_CASE_SENSITIVE)) {
1737 if (SMB_TREE_IS_CASEINSENSITIVE(sr))
1738 flags |= SMB_IGNORE_CASE;
1739 }
1740
1741 fname = kmem_alloc(MAXNAMELEN, KM_SLEEP);
1742 sname = kmem_alloc(MAXNAMELEN, KM_SLEEP);
1743
1744 if (smb_is_stream_name(name)) {
1745 smb_stream_parse_name(name, fname, sname);
1746
1747 /*
1748 * Look up the unnamed stream (i.e. fname).
1749 * Unmangle processing will be done on fname
1750 * as well as any link target.
1751 */
1752 rc = smb_fsop_lookup(sr, cr, flags, root_node, dnode,
1753 fname, &fnode);
1754
1755 if (rc != 0) {
1756 kmem_free(fname, MAXNAMELEN);
1757 kmem_free(sname, MAXNAMELEN);
1758 return (rc);
1759 }
1760
1761 od_name = kmem_alloc(MAXNAMELEN, KM_SLEEP);
1762
1763 /*
1764 * od_name is the on-disk name of the stream, except
1765 * without the prepended stream prefix (SMB_STREAM_PREFIX)
1766 */
1767
1768 /*
1769 * XXX
1770 * What permissions NTFS requires for stream lookup if any?
1771 */
1772 rc = smb_vop_stream_lookup(fnode->vp, sname, &vp, od_name,
1773 &xattrdirvp, flags, root_node->vp, cr);
1774
1775 if (rc != 0) {
1776 smb_node_release(fnode);
1777 kmem_free(fname, MAXNAMELEN);
1778 kmem_free(sname, MAXNAMELEN);
1779 kmem_free(od_name, MAXNAMELEN);
1780 return (rc);
1781 }
1782
1783 *ret_snode = smb_stream_node_lookup(sr, cr, fnode, xattrdirvp,
1784 vp, od_name);
1785
1786 kmem_free(od_name, MAXNAMELEN);
1787 smb_node_release(fnode);
1788 VN_RELE(xattrdirvp);
1789 VN_RELE(vp);
1790
1791 if (*ret_snode == NULL) {
1792 kmem_free(fname, MAXNAMELEN);
1793 kmem_free(sname, MAXNAMELEN);
1794 return (ENOMEM);
1795 }
1796 } else {
1797 rc = smb_fsop_lookup(sr, cr, flags, root_node, dnode, name,
1798 ret_snode);
1799 }
1800
1801 if (rc == 0) {
1802 ASSERT(ret_snode);
1803 if (SMB_TREE_CONTAINS_NODE(sr, *ret_snode) == 0) {
1804 smb_node_release(*ret_snode);
1805 *ret_snode = NULL;
1806 rc = EACCES;
1807 }
1808 }
1809
1810 kmem_free(fname, MAXNAMELEN);
1811 kmem_free(sname, MAXNAMELEN);
1812
1813 return (rc);
1814 }
1815
1816 /*
1817 * smb_fsop_lookup
1818 *
1819 * All SMB functions should use this smb_vop_lookup wrapper to ensure that
1820 * the smb_vop_lookup is performed with the appropriate credentials and using
1821 * case insensitive compares. Please document any direct call to smb_vop_lookup
1822 * to explain the reason for avoiding this wrapper.
1823 *
1824 * It is assumed that a reference exists on dnode coming into this routine
1825 * (and that it is safe from deallocation).
1826 *
1827 * Same with the root_node.
1828 *
1829 * *ret_snode is returned with a reference upon success. No reference is
1830 * taken if an error is returned.
1831 *
1832 * Note: The returned ret_snode may be in a child mount. This is ok for
1833 * readdir.
1834 *
1835 * Other smb_fsop_* routines will call SMB_TREE_CONTAINS_NODE() to prevent
1836 * operations on files not in the parent mount.
1837 *
1838 * Case sensitivity flags (SMB_IGNORE_CASE, SMB_CASE_SENSITIVE):
1839 * if SMB_CASE_SENSITIVE is set, the SMB_IGNORE_CASE flag will NOT be set
1840 * based on the tree's case sensitivity. However, if the SMB_IGNORE_CASE
1841 * flag is set in the flags value passed as a parameter, a case insensitive
1842 * lookup WILL be done (regardless of whether SMB_CASE_SENSITIVE is set
1843 * or not).
1844 */
1845 int
1846 smb_fsop_lookup(
1847 smb_request_t *sr,
1848 cred_t *cr,
1849 int flags,
1850 smb_node_t *root_node,
1851 smb_node_t *dnode,
1852 char *name,
1853 smb_node_t **ret_snode)
1854 {
1855 smb_node_t *lnk_target_node;
1856 smb_node_t *lnk_dnode;
1857 char *longname;
1858 char *od_name;
1859 vnode_t *vp;
1860 int rc;
1861 int ret_flags;
1862 smb_attr_t attr;
1863
1864 ASSERT(cr);
1865 ASSERT(dnode);
1866 ASSERT(dnode->n_magic == SMB_NODE_MAGIC);
1867 ASSERT(dnode->n_state != SMB_NODE_STATE_DESTROYING);
1868
1869 if (name == NULL)
1870 return (EINVAL);
1871
1872 if (SMB_TREE_CONTAINS_NODE(sr, dnode) == 0)
1873 return (EACCES);
1874
1875 if (!(flags & SMB_CASE_SENSITIVE)) {
1876 if (SMB_TREE_IS_CASEINSENSITIVE(sr))
1877 flags |= SMB_IGNORE_CASE;
1878 }
1879 if (SMB_TREE_SUPPORTS_CATIA(sr))
1880 flags |= SMB_CATIA;
1881 if (SMB_TREE_SUPPORTS_ABE(sr))
1882 flags |= SMB_ABE;
1883
1884 od_name = kmem_alloc(MAXNAMELEN, KM_SLEEP);
1885
1886 rc = smb_vop_lookup(dnode->vp, name, &vp, od_name, flags,
1887 &ret_flags, root_node ? root_node->vp : NULL, &attr, cr);
1888
1889 if (rc != 0) {
1890 if (!SMB_TREE_SUPPORTS_SHORTNAMES(sr) ||
1891 !smb_maybe_mangled(name)) {
1892 kmem_free(od_name, MAXNAMELEN);
1893 return (rc);
1894 }
1895
1896 longname = kmem_alloc(MAXNAMELEN, KM_SLEEP);
1897 rc = smb_unmangle(dnode, name, longname, MAXNAMELEN, flags);
1898 if (rc != 0) {
1899 kmem_free(od_name, MAXNAMELEN);
1900 kmem_free(longname, MAXNAMELEN);
1901 return (rc);
1902 }
1903
1904 /*
1905 * longname is the real (case-sensitive)
1906 * on-disk name.
1907 * We make sure we do a lookup on this exact
1908 * name, as the name was mangled and denotes
1909 * a unique file.
1910 */
1911
1912 if (flags & SMB_IGNORE_CASE)
1913 flags &= ~SMB_IGNORE_CASE;
1914
1915 rc = smb_vop_lookup(dnode->vp, longname, &vp, od_name,
1916 flags, &ret_flags, root_node ? root_node->vp : NULL, &attr,
1917 cr);
1918
1919 kmem_free(longname, MAXNAMELEN);
1920
1921 if (rc != 0) {
1922 kmem_free(od_name, MAXNAMELEN);
1923 return (rc);
1924 }
1925 }
1926
1927 if ((flags & SMB_FOLLOW_LINKS) && (vp->v_type == VLNK) &&
1928 ((attr.sa_dosattr & FILE_ATTRIBUTE_REPARSE_POINT) == 0)) {
1929 rc = smb_pathname(sr, od_name, FOLLOW, root_node, dnode,
1930 &lnk_dnode, &lnk_target_node, cr);
1931
1932 if (rc != 0) {
1933 /*
1934 * The link is assumed to be for the last component
1935 * of a path. Hence any ENOTDIR error will be returned
1936 * as ENOENT.
1937 */
1938 if (rc == ENOTDIR)
1939 rc = ENOENT;
1940
1941 VN_RELE(vp);
1942 kmem_free(od_name, MAXNAMELEN);
1943 return (rc);
1944 }
1945
1946 /*
1947 * Release the original VLNK vnode
1948 */
1949
1950 VN_RELE(vp);
1951 vp = lnk_target_node->vp;
1952
1953 rc = smb_vop_traverse_check(&vp);
1954
1955 if (rc != 0) {
1956 smb_node_release(lnk_dnode);
1957 smb_node_release(lnk_target_node);
1958 kmem_free(od_name, MAXNAMELEN);
1959 return (rc);
1960 }
1961
1962 /*
1963 * smb_vop_traverse_check() may have returned a different vnode
1964 */
1965
1966 if (lnk_target_node->vp == vp) {
1967 *ret_snode = lnk_target_node;
1968 } else {
1969 *ret_snode = smb_node_lookup(sr, NULL, cr, vp,
1970 lnk_target_node->od_name, lnk_dnode, NULL);
1971 VN_RELE(vp);
1972
1973 if (*ret_snode == NULL)
1974 rc = ENOMEM;
1975 smb_node_release(lnk_target_node);
1976 }
1977
1978 smb_node_release(lnk_dnode);
1979
1980 } else {
1981
1982 rc = smb_vop_traverse_check(&vp);
1983 if (rc) {
1984 VN_RELE(vp);
1985 kmem_free(od_name, MAXNAMELEN);
1986 return (rc);
1987 }
1988
1989 *ret_snode = smb_node_lookup(sr, NULL, cr, vp, od_name,
1990 dnode, NULL);
1991 VN_RELE(vp);
1992
1993 if (*ret_snode == NULL)
1994 rc = ENOMEM;
1995 }
1996
1997 kmem_free(od_name, MAXNAMELEN);
1998 return (rc);
1999 }
2000
2001 int /*ARGSUSED*/
2002 smb_fsop_commit(smb_request_t *sr, cred_t *cr, smb_node_t *snode)
2003 {
2004 ASSERT(cr);
2005 ASSERT(snode);
2006 ASSERT(snode->n_magic == SMB_NODE_MAGIC);
2007 ASSERT(snode->n_state != SMB_NODE_STATE_DESTROYING);
2008
2009 ASSERT(sr);
2010 ASSERT(sr->tid_tree);
2011 if (SMB_TREE_IS_READONLY(sr))
2012 return (EROFS);
2013
2014 return (smb_vop_commit(snode->vp, cr));
2015 }
2016
2017 /*
2018 * smb_fsop_aclread
2019 *
2020 * Retrieve filesystem ACL. Depends on requested ACLs in
2021 * fs_sd->sd_secinfo, it'll set DACL and SACL pointers in
2022 * fs_sd. Note that requesting a DACL/SACL doesn't mean that
2023 * the corresponding field in fs_sd should be non-NULL upon
2024 * return, since the target ACL might not contain that type of
2025 * entries.
2026 *
2027 * Returned ACL is always in ACE_T (aka ZFS) format.
2028 * If successful the allocated memory for the ACL should be freed
2029 * using smb_fsacl_free() or smb_fssd_term()
2030 */
2031 int
2032 smb_fsop_aclread(smb_request_t *sr, cred_t *cr, smb_node_t *snode,
2033 smb_fssd_t *fs_sd)
2034 {
2035 int error = 0;
2036 int flags = 0;
2037 int access = 0;
2038 acl_t *acl;
2039 smb_node_t *unnamed_node;
2040
2041 ASSERT(cr);
2042
2043 if (SMB_TREE_HAS_ACCESS(sr, ACE_READ_ACL) == 0)
2044 return (EACCES);
2045
2046 if (sr->fid_ofile) {
2047 if (fs_sd->sd_secinfo & SMB_DACL_SECINFO)
2048 access = READ_CONTROL;
2049
2050 if (fs_sd->sd_secinfo & SMB_SACL_SECINFO)
2051 access |= ACCESS_SYSTEM_SECURITY;
2052
2053 error = smb_ofile_access(sr->fid_ofile, cr, access);
2054 if (error != NT_STATUS_SUCCESS) {
2055 return (EACCES);
2056 }
2057 }
2058
2059 unnamed_node = SMB_IS_STREAM(snode);
2060 if (unnamed_node) {
2061 ASSERT(unnamed_node->n_magic == SMB_NODE_MAGIC);
2062 ASSERT(unnamed_node->n_state != SMB_NODE_STATE_DESTROYING);
2063 /*
2064 * Streams don't have ACL, any read ACL attempt on a stream
2065 * should be performed on the unnamed stream.
2066 */
2067 snode = unnamed_node;
2068 }
2069
2070 if (smb_tree_has_feature(sr->tid_tree, SMB_TREE_ACEMASKONACCESS))
2071 flags = ATTR_NOACLCHECK;
2072
2073 error = smb_vop_acl_read(snode->vp, &acl, flags,
2074 sr->tid_tree->t_acltype, cr);
2075 if (error != 0) {
2076 return (error);
2077 }
2078
2079 error = acl_translate(acl, _ACL_ACE_ENABLED,
2080 smb_node_is_dir(snode), fs_sd->sd_uid, fs_sd->sd_gid);
2081
2082 if (error == 0) {
2083 smb_fsacl_split(acl, &fs_sd->sd_zdacl, &fs_sd->sd_zsacl,
2084 fs_sd->sd_secinfo);
2085 }
2086
2087 acl_free(acl);
2088 return (error);
2089 }
2090
2091 /*
2092 * smb_fsop_aclwrite
2093 *
2094 * Stores the filesystem ACL provided in fs_sd->sd_acl.
2095 */
2096 int
2097 smb_fsop_aclwrite(smb_request_t *sr, cred_t *cr, smb_node_t *snode,
2098 smb_fssd_t *fs_sd)
2099 {
2100 int target_flavor;
2101 int error = 0;
2102 int flags = 0;
2103 int access = 0;
2104 acl_t *acl, *dacl, *sacl;
2105 smb_node_t *unnamed_node;
2106
2107 ASSERT(cr);
2108
2109 ASSERT(sr);
2110 ASSERT(sr->tid_tree);
2111 if (SMB_TREE_IS_READONLY(sr))
2112 return (EROFS);
2113
2114 if (SMB_TREE_HAS_ACCESS(sr, ACE_WRITE_ACL) == 0)
2115 return (EACCES);
2116
2117 if (sr->fid_ofile) {
2118 if (fs_sd->sd_secinfo & SMB_DACL_SECINFO)
2119 access = WRITE_DAC;
2120
2121 if (fs_sd->sd_secinfo & SMB_SACL_SECINFO)
2122 access |= ACCESS_SYSTEM_SECURITY;
2123
2124 error = smb_ofile_access(sr->fid_ofile, cr, access);
2125 if (error != NT_STATUS_SUCCESS)
2126 return (EACCES);
2127 }
2128
2129 switch (sr->tid_tree->t_acltype) {
2130 case ACLENT_T:
2131 target_flavor = _ACL_ACLENT_ENABLED;
2132 break;
2133
2134 case ACE_T:
2135 target_flavor = _ACL_ACE_ENABLED;
2136 break;
2137 default:
2138 return (EINVAL);
2139 }
2140
2141 unnamed_node = SMB_IS_STREAM(snode);
2142 if (unnamed_node) {
2143 ASSERT(unnamed_node->n_magic == SMB_NODE_MAGIC);
2144 ASSERT(unnamed_node->n_state != SMB_NODE_STATE_DESTROYING);
2145 /*
2146 * Streams don't have ACL, any write ACL attempt on a stream
2147 * should be performed on the unnamed stream.
2148 */
2149 snode = unnamed_node;
2150 }
2151
2152 dacl = fs_sd->sd_zdacl;
2153 sacl = fs_sd->sd_zsacl;
2154
2155 ASSERT(dacl || sacl);
2156 if ((dacl == NULL) && (sacl == NULL))
2157 return (EINVAL);
2158
2159 if (dacl && sacl)
2160 acl = smb_fsacl_merge(dacl, sacl);
2161 else if (dacl)
2162 acl = dacl;
2163 else
2164 acl = sacl;
2165
2166 error = acl_translate(acl, target_flavor, smb_node_is_dir(snode),
2167 fs_sd->sd_uid, fs_sd->sd_gid);
2168 if (error == 0) {
2169 if (smb_tree_has_feature(sr->tid_tree,
2170 SMB_TREE_ACEMASKONACCESS))
2171 flags = ATTR_NOACLCHECK;
2172
2173 error = smb_vop_acl_write(snode->vp, acl, flags, cr);
2174 }
2175
2176 if (dacl && sacl)
2177 acl_free(acl);
2178
2179 return (error);
2180 }
2181
2182 acl_type_t
2183 smb_fsop_acltype(smb_node_t *snode)
2184 {
2185 return (smb_vop_acl_type(snode->vp));
2186 }
2187
2188 /*
2189 * smb_fsop_sdread
2190 *
2191 * Read the requested security descriptor items from filesystem.
2192 * The items are specified in fs_sd->sd_secinfo.
2193 */
2194 int
2195 smb_fsop_sdread(smb_request_t *sr, cred_t *cr, smb_node_t *snode,
2196 smb_fssd_t *fs_sd)
2197 {
2198 int error = 0;
2199 int getowner = 0;
2200 cred_t *ga_cred;
2201 smb_attr_t attr;
2202
2203 ASSERT(cr);
2204 ASSERT(fs_sd);
2205
2206 /*
2207 * File's uid/gid is fetched in two cases:
2208 *
2209 * 1. it's explicitly requested
2210 *
2211 * 2. target ACL is ACE_T (ZFS ACL). They're needed for
2212 * owner@/group@ entries. In this case kcred should be used
2213 * because uid/gid are fetched on behalf of smb server.
2214 */
2215 if (fs_sd->sd_secinfo & (SMB_OWNER_SECINFO | SMB_GROUP_SECINFO)) {
2216 getowner = 1;
2217 ga_cred = cr;
2218 } else if (sr->tid_tree->t_acltype == ACE_T) {
2219 getowner = 1;
2220 ga_cred = zone_kcred();
2221 }
2222
2223 if (getowner) {
2224 /*
2225 * Windows require READ_CONTROL to read owner/group SID since
2226 * they're part of Security Descriptor.
2227 * ZFS only requires read_attribute. Need to have a explicit
2228 * access check here.
2229 */
2230 if (sr->fid_ofile == NULL) {
2231 error = smb_fsop_access(sr, ga_cred, snode,
2232 READ_CONTROL);
2233 if (error)
2234 return (EACCES);
2235 }
2236
2237 attr.sa_mask = SMB_AT_UID | SMB_AT_GID;
2238 error = smb_fsop_getattr(sr, ga_cred, snode, &attr);
2239 if (error == 0) {
2240 fs_sd->sd_uid = attr.sa_vattr.va_uid;
2241 fs_sd->sd_gid = attr.sa_vattr.va_gid;
2242 } else {
2243 return (error);
2244 }
2245 }
2246
2247 if (fs_sd->sd_secinfo & SMB_ACL_SECINFO) {
2248 error = smb_fsop_aclread(sr, cr, snode, fs_sd);
2249 }
2250
2251 return (error);
2252 }
2253
2254 /*
2255 * smb_fsop_sdmerge
2256 *
2257 * From SMB point of view DACL and SACL are two separate list
2258 * which can be manipulated independently without one affecting
2259 * the other, but entries for both DACL and SACL will end up
2260 * in the same ACL if target filesystem supports ACE_T ACLs.
2261 *
2262 * So, if either DACL or SACL is present in the client set request
2263 * the entries corresponding to the non-present ACL shouldn't
2264 * be touched in the FS ACL.
2265 *
2266 * fs_sd parameter contains DACL and SACL specified by SMB
2267 * client to be set on a file/directory. The client could
2268 * specify both or one of these ACLs (if none is specified
2269 * we don't get this far). When both DACL and SACL are given
2270 * by client the existing ACL should be overwritten. If only
2271 * one of them is specified the entries corresponding to the other
2272 * ACL should not be touched. For example, if only DACL
2273 * is specified in input fs_sd, the function reads audit entries
2274 * of the existing ACL of the file and point fs_sd->sd_zsdacl
2275 * pointer to the fetched SACL, this way when smb_fsop_sdwrite()
2276 * function is called the passed fs_sd would point to the specified
2277 * DACL by client and fetched SACL from filesystem, so the file
2278 * will end up with correct ACL.
2279 */
2280 static int
2281 smb_fsop_sdmerge(smb_request_t *sr, smb_node_t *snode, smb_fssd_t *fs_sd)
2282 {
2283 smb_fssd_t cur_sd;
2284 cred_t *kcr = zone_kcred();
2285 int error = 0;
2286
2287 if (sr->tid_tree->t_acltype != ACE_T)
2288 /* Don't bother if target FS doesn't support ACE_T */
2289 return (0);
2290
2291 if ((fs_sd->sd_secinfo & SMB_ACL_SECINFO) != SMB_ACL_SECINFO) {
2292 if (fs_sd->sd_secinfo & SMB_DACL_SECINFO) {
2293 /*
2294 * Don't overwrite existing audit entries
2295 */
2296 smb_fssd_init(&cur_sd, SMB_SACL_SECINFO,
2297 fs_sd->sd_flags);
2298
2299 error = smb_fsop_sdread(sr, kcr, snode, &cur_sd);
2300 if (error == 0) {
2301 ASSERT(fs_sd->sd_zsacl == NULL);
2302 fs_sd->sd_zsacl = cur_sd.sd_zsacl;
2303 if (fs_sd->sd_zsacl && fs_sd->sd_zdacl)
2304 fs_sd->sd_zsacl->acl_flags =
2305 fs_sd->sd_zdacl->acl_flags;
2306 }
2307 } else {
2308 /*
2309 * Don't overwrite existing access entries
2310 */
2311 smb_fssd_init(&cur_sd, SMB_DACL_SECINFO,
2312 fs_sd->sd_flags);
2313
2314 error = smb_fsop_sdread(sr, kcr, snode, &cur_sd);
2315 if (error == 0) {
2316 ASSERT(fs_sd->sd_zdacl == NULL);
2317 fs_sd->sd_zdacl = cur_sd.sd_zdacl;
2318 if (fs_sd->sd_zdacl && fs_sd->sd_zsacl)
2319 fs_sd->sd_zdacl->acl_flags =
2320 fs_sd->sd_zsacl->acl_flags;
2321 }
2322 }
2323
2324 if (error)
2325 smb_fssd_term(&cur_sd);
2326 }
2327
2328 return (error);
2329 }
2330
2331 /*
2332 * smb_fsop_sdwrite
2333 *
2334 * Stores the given uid, gid and acl in filesystem.
2335 * Provided items in fs_sd are specified by fs_sd->sd_secinfo.
2336 *
2337 * A SMB security descriptor could contain owner, primary group,
2338 * DACL and SACL. Setting an SD should be atomic but here it has to
2339 * be done via two separate FS operations: VOP_SETATTR and
2340 * VOP_SETSECATTR. Therefore, this function has to simulate the
2341 * atomicity as well as it can.
2342 *
2343 * Get the current uid, gid before setting the new uid/gid
2344 * so if smb_fsop_aclwrite fails they can be restored. root cred is
2345 * used to get currend uid/gid since this operation is performed on
2346 * behalf of the server not the user.
2347 *
2348 * If setting uid/gid fails with EPERM it means that and invalid
2349 * owner has been specified. Callers should translate this to
2350 * STATUS_INVALID_OWNER which is not the normal mapping for EPERM
2351 * in upper layers, so EPERM is mapped to EBADE.
2352 */
2353 int
2354 smb_fsop_sdwrite(smb_request_t *sr, cred_t *cr, smb_node_t *snode,
2355 smb_fssd_t *fs_sd, int overwrite)
2356 {
2357 smb_attr_t set_attr;
2358 smb_attr_t orig_attr;
2359 cred_t *kcr = zone_kcred();
2360 int error = 0;
2361 int access = 0;
2362
2363 ASSERT(cr);
2364 ASSERT(fs_sd);
2365
2366 ASSERT(sr);
2367 ASSERT(sr->tid_tree);
2368 if (SMB_TREE_IS_READONLY(sr))
2369 return (EROFS);
2370
2371 bzero(&set_attr, sizeof (smb_attr_t));
2372
2373 if (fs_sd->sd_secinfo & SMB_OWNER_SECINFO) {
2374 set_attr.sa_vattr.va_uid = fs_sd->sd_uid;
2375 set_attr.sa_mask |= SMB_AT_UID;
2376 access |= WRITE_OWNER;
2377 }
2378
2379 if (fs_sd->sd_secinfo & SMB_GROUP_SECINFO) {
2380 set_attr.sa_vattr.va_gid = fs_sd->sd_gid;
2381 set_attr.sa_mask |= SMB_AT_GID;
2382 access |= WRITE_OWNER;
2383 }
2384
2385 if (fs_sd->sd_secinfo & SMB_DACL_SECINFO)
2386 access |= WRITE_DAC;
2387
2388 if (fs_sd->sd_secinfo & SMB_SACL_SECINFO)
2389 access |= ACCESS_SYSTEM_SECURITY;
2390
2391 if (sr->fid_ofile)
2392 error = smb_ofile_access(sr->fid_ofile, cr, access);
2393 else
2394 error = smb_fsop_access(sr, cr, snode, access);
2395
2396 if (error)
2397 return (EACCES);
2398
2399 if (set_attr.sa_mask) {
2400 orig_attr.sa_mask = SMB_AT_UID | SMB_AT_GID;
2401 error = smb_fsop_getattr(sr, kcr, snode, &orig_attr);
2402 if (error == 0) {
2403 error = smb_fsop_setattr(sr, cr, snode, &set_attr);
2404 if (error == EPERM)
2405 error = EBADE;
2406 }
2407
2408 if (error)
2409 return (error);
2410 }
2411
2412 if (fs_sd->sd_secinfo & SMB_ACL_SECINFO) {
2413 if (overwrite == 0) {
2414 error = smb_fsop_sdmerge(sr, snode, fs_sd);
2415 if (error)
2416 return (error);
2417 }
2418
2419 error = smb_fsop_aclwrite(sr, cr, snode, fs_sd);
2420 if (error) {
2421 /*
2422 * Revert uid/gid changes if required.
2423 */
2424 if (set_attr.sa_mask) {
2425 orig_attr.sa_mask = set_attr.sa_mask;
2426 (void) smb_fsop_setattr(sr, kcr, snode,
2427 &orig_attr);
2428 }
2429 }
2430 }
2431
2432 return (error);
2433 }
2434
2435 #ifdef _KERNEL
2436 /*
2437 * smb_fsop_sdinherit
2438 *
2439 * Inherit the security descriptor from the parent container.
2440 * This function is called after FS has created the file/folder
2441 * so if this doesn't do anything it means FS inheritance is
2442 * in place.
2443 *
2444 * Do inheritance for ZFS internally.
2445 *
2446 * If we want to let ZFS does the inheritance the
2447 * following setting should be true:
2448 *
2449 * - aclinherit = passthrough
2450 * - aclmode = passthrough
2451 * - smbd umask = 0777
2452 *
2453 * This will result in right effective permissions but
2454 * ZFS will always add 6 ACEs for owner, owning group
2455 * and others to be POSIX compliant. This is not what
2456 * Windows clients/users expect, so we decided that CIFS
2457 * implements Windows rules and overwrite whatever ZFS
2458 * comes up with. This way we also don't have to care
2459 * about ZFS aclinherit and aclmode settings.
2460 */
2461 static int
2462 smb_fsop_sdinherit(smb_request_t *sr, smb_node_t *dnode, smb_fssd_t *fs_sd)
2463 {
2464 acl_t *dacl = NULL;
2465 acl_t *sacl = NULL;
2466 int is_dir;
2467 int error;
2468
2469 ASSERT(fs_sd);
2470
2471 if (sr->tid_tree->t_acltype != ACE_T) {
2472 /*
2473 * No forced inheritance for non-ZFS filesystems.
2474 */
2475 fs_sd->sd_secinfo = 0;
2476 return (0);
2477 }
2478
2479
2480 /* Fetch parent directory's ACL */
2481 error = smb_fsop_sdread(sr, zone_kcred(), dnode, fs_sd);
2482 if (error) {
2483 return (error);
2484 }
2485
2486 is_dir = (fs_sd->sd_flags & SMB_FSSD_FLAGS_DIR);
2487 dacl = smb_fsacl_inherit(fs_sd->sd_zdacl, is_dir, SMB_DACL_SECINFO,
2488 sr->user_cr);
2489 sacl = smb_fsacl_inherit(fs_sd->sd_zsacl, is_dir, SMB_SACL_SECINFO,
2490 sr->user_cr);
2491
2492 if (sacl == NULL)
2493 fs_sd->sd_secinfo &= ~SMB_SACL_SECINFO;
2494
2495 smb_fsacl_free(fs_sd->sd_zdacl);
2496 smb_fsacl_free(fs_sd->sd_zsacl);
2497
2498 fs_sd->sd_zdacl = dacl;
2499 fs_sd->sd_zsacl = sacl;
2500
2501 return (0);
2502 }
2503 #endif /* _KERNEL */
2504
2505 /*
2506 * smb_fsop_eaccess
2507 *
2508 * Returns the effective permission of the given credential for the
2509 * specified object.
2510 *
2511 * This is just a workaround. We need VFS/FS support for this.
2512 */
2513 void
2514 smb_fsop_eaccess(smb_request_t *sr, cred_t *cr, smb_node_t *snode,
2515 uint32_t *eaccess)
2516 {
2517 int access = 0;
2518 vnode_t *dir_vp;
2519 smb_node_t *unnamed_node;
2520
2521 ASSERT(cr);
2522 ASSERT(snode);
2523 ASSERT(snode->n_magic == SMB_NODE_MAGIC);
2524 ASSERT(snode->n_state != SMB_NODE_STATE_DESTROYING);
2525
2526 unnamed_node = SMB_IS_STREAM(snode);
2527 if (unnamed_node) {
2528 ASSERT(unnamed_node->n_magic == SMB_NODE_MAGIC);
2529 ASSERT(unnamed_node->n_state != SMB_NODE_STATE_DESTROYING);
2530 /*
2531 * Streams authorization should be performed against the
2532 * unnamed stream.
2533 */
2534 snode = unnamed_node;
2535 }
2536
2537 if (smb_tree_has_feature(sr->tid_tree, SMB_TREE_ACEMASKONACCESS)) {
2538 dir_vp = (snode->n_dnode) ? snode->n_dnode->vp : NULL;
2539 smb_vop_eaccess(snode->vp, (int *)eaccess, V_ACE_MASK, dir_vp,
2540 cr);
2541 return;
2542 }
2543
2544 /*
2545 * FS doesn't understand 32-bit mask
2546 */
2547 smb_vop_eaccess(snode->vp, &access, 0, NULL, cr);
2548 access &= sr->tid_tree->t_access;
2549
2550 *eaccess = READ_CONTROL | FILE_READ_EA | FILE_READ_ATTRIBUTES;
2551
2552 if (access & VREAD)
2553 *eaccess |= FILE_READ_DATA;
2554
2555 if (access & VEXEC)
2556 *eaccess |= FILE_EXECUTE;
2557
2558 if (access & VWRITE)
2559 *eaccess |= FILE_WRITE_DATA | FILE_WRITE_ATTRIBUTES |
2560 FILE_WRITE_EA | FILE_APPEND_DATA | FILE_DELETE_CHILD;
2561 }
2562
2563 /*
2564 * smb_fsop_shrlock
2565 *
2566 * For the current open request, check file sharing rules
2567 * against existing opens.
2568 *
2569 * Returns NT_STATUS_SHARING_VIOLATION if there is any
2570 * sharing conflict. Returns NT_STATUS_SUCCESS otherwise.
2571 *
2572 * Full system-wide share reservation synchronization is available
2573 * when the nbmand (non-blocking mandatory) mount option is set
2574 * (i.e. nbl_need_crit() is true) and nbmand critical regions are used.
2575 * This provides synchronization with NFS and local processes. The
2576 * critical regions are entered in VOP_SHRLOCK()/fs_shrlock() (called
2577 * from smb_open_subr()/smb_fsop_shrlock()/smb_vop_shrlock()) as well
2578 * as the CIFS rename and delete paths.
2579 *
2580 * The CIFS server will also enter the nbl critical region in the open,
2581 * rename, and delete paths when nbmand is not set. There is limited
2582 * coordination with local and VFS share reservations in this case.
2583 * Note that when the nbmand mount option is not set, the VFS layer
2584 * only processes advisory reservations and the delete mode is not checked.
2585 *
2586 * Whether or not the nbmand mount option is set, intra-CIFS share
2587 * checking is done in the open, delete, and rename paths using a CIFS
2588 * critical region (node->n_share_lock).
2589 */
2590 uint32_t
2591 smb_fsop_shrlock(cred_t *cr, smb_node_t *node, uint32_t uniq_fid,
2592 uint32_t desired_access, uint32_t share_access)
2593 {
2594 int rc;
2595
2596 /* Allow access if the request is just for meta data */
2597 if ((desired_access & FILE_DATA_ALL) == 0)
2598 return (NT_STATUS_SUCCESS);
2599
2600 rc = smb_node_open_check(node, desired_access, share_access);
2601 if (rc)
2602 return (NT_STATUS_SHARING_VIOLATION);
2603
2604 rc = smb_vop_shrlock(node->vp, uniq_fid, desired_access, share_access,
2605 cr);
2606 if (rc)
2607 return (NT_STATUS_SHARING_VIOLATION);
2608
2609 return (NT_STATUS_SUCCESS);
2610 }
2611
2612 void
2613 smb_fsop_unshrlock(cred_t *cr, smb_node_t *node, uint32_t uniq_fid)
2614 {
2615 (void) smb_vop_unshrlock(node->vp, uniq_fid, cr);
2616 }
2617
2618 int
2619 smb_fsop_frlock(smb_node_t *node, smb_lock_t *lock, boolean_t unlock,
2620 cred_t *cr)
2621 {
2622 flock64_t bf;
2623 int flag = F_REMOTELOCK;
2624
2625 /*
2626 * VOP_FRLOCK() will not be called if:
2627 *
2628 * 1) The lock has a range of zero bytes. The semantics of Windows and
2629 * POSIX are different. In the case of POSIX it asks for the locking
2630 * of all the bytes from the offset provided until the end of the
2631 * file. In the case of Windows a range of zero locks nothing and
2632 * doesn't conflict with any other lock.
2633 *
2634 * 2) The lock rolls over (start + lenght < start). Solaris will assert
2635 * if such a request is submitted. This will not create
2636 * incompatibilities between POSIX and Windows. In the Windows world,
2637 * if a client submits such a lock, the server will not lock any
2638 * bytes. Interestingly if the same lock (same offset and length) is
2639 * resubmitted Windows will consider that there is an overlap and
2640 * the granting rules will then apply.
2641 */
2642 if ((lock->l_length == 0) ||
2643 ((lock->l_start + lock->l_length - 1) < lock->l_start))
2644 return (0);
2645
2646 bzero(&bf, sizeof (bf));
2647
2648 if (unlock) {
2649 bf.l_type = F_UNLCK;
2650 } else if (lock->l_type == SMB_LOCK_TYPE_READONLY) {
2651 bf.l_type = F_RDLCK;
2652 flag |= FREAD;
2653 } else if (lock->l_type == SMB_LOCK_TYPE_READWRITE) {
2654 bf.l_type = F_WRLCK;
2655 flag |= FWRITE;
2656 }
2657
2658 bf.l_start = lock->l_start;
2659 bf.l_len = lock->l_length;
2660 bf.l_pid = lock->l_file->f_uniqid;
2661 bf.l_sysid = smb_ct.cc_sysid;
2662
2663 return (smb_vop_frlock(node->vp, cr, flag, &bf));
2664 }